[go: up one dir, main page]

WO1997036725A1 - Process and plant for treating web-like product waste with at least one meltable component - Google Patents

Process and plant for treating web-like product waste with at least one meltable component Download PDF

Info

Publication number
WO1997036725A1
WO1997036725A1 PCT/EP1997/001495 EP9701495W WO9736725A1 WO 1997036725 A1 WO1997036725 A1 WO 1997036725A1 EP 9701495 W EP9701495 W EP 9701495W WO 9736725 A1 WO9736725 A1 WO 9736725A1
Authority
WO
WIPO (PCT)
Prior art keywords
melting
heated
plant
bitumen
hot
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP1997/001495
Other languages
German (de)
French (fr)
Inventor
Bettina Lindner
Gert Langer
Udo Werner
Peter Bazyli
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to EP97915424A priority Critical patent/EP0892706A1/en
Priority to AU22911/97A priority patent/AU2291197A/en
Publication of WO1997036725A1 publication Critical patent/WO1997036725A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
    • B29B17/02—Separating plastics from other materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2095/00—Use of bituminous materials as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2313/00—Use of textile products or fabrics as reinforcement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2705/00—Use of metals, their alloys or their compounds, for preformed parts, e.g. for inserts
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/62—Plastics recycling; Rubber recycling

Definitions

  • the invention is directed to a process for the treatment of waste, in particular sheet-like products with at least one meltable component, with a shredding step at room temperature, a melting step and a hot grinding step, in particular for the preparation of reinforced bitumen sheet waste.
  • roofing membranes cannot be produced from recycled material, with DD-264 016-A1 adding that the solution technology described there can no longer be used today for environmental reasons.
  • GB-1 558 320 or US Pat. Nos. 4,222,851 or 4,330,340 show further solutions, some of which describe very complex process steps in order to recover the pure bitumen.
  • the object of the invention is therefore to optimize a recovery process for such multi-material systems in such a way that O 97/36725 PC17EP97 / 01495
  • a recycled material is provided which is immediately returned to corresponding webs, e.g. can be processed to bitumen sealing membranes.
  • this object is achieved according to the invention in that the feed material which has been roughly comminuted at ambient temperature is melted in a continuous pass and then freed from the non-meltable constituents in a heated separating device and subsequently in the form of a pressed mass continuous flow is filtered, it being possible, in particular in the case of bitumen sheets, for the coarsely comminuted feed material to be freed from the reinforcements or inlays made of fiber fabric, nonwovens or metal material after melting in a heated separating device and then subsequently pressed as a pressed bitumen mass filtered throughput and fed to a hot grinding plant.
  • the melting step is carried out in a heated trough-screw heat exchanger which is heated, for example, by means of thermal oil, it also being possible to heat the squeezing device provided accordingly, so that a working temperature range of, for example, can be achieved with simple means Can be set between 170 ° and 200 ° C.
  • the pressed bitumen mass is advantageously subjected to a continuous filter process in a further treatment step, for example after an intermediate buffering in a heated stirring tank in order to equalize the mass flow and to prevent the feed pumps installed in the rear part of the plant from running dry, so that, if necessary, coarser coarse solid components can also be discharged , before the mass is reduced in a continuous pass, for example to component dimensions of at most approx. 100 ⁇ m.
  • a circuit tion should be provided with a single and repeated circulation.
  • additives can be added depending on the type of product desired.
  • a peculiarity of the invention can, however, also consist in the fact that liquid fresh bitumen is added to the material in the first melting step in order to achieve a more uniform procedure, but this can also be provided for cleaning the plant.
  • the invention also provides a system which is characterized in that two-shaft comminution machines which run slowly as the comminution device and a heated trough-screw heat exchanger are provided as the melting device and in that between the melting and the Hot grinding device, a heated screw press is arranged as a separating device.
  • the preparation can be carried out in a continuous pass.
  • the material is pre-sorted, cleaned and processed from coarse metals such as sheet metal, nails and aluminum profiles before treatment or the like, freed before the preparation steps according to the invention take place.
  • the units are expediently heated by thermal oils, for example.
  • the heat transfer can take place in a trough screw transmitter which is used as a melting machine operating in continuous operation.
  • the screw can be designed as a hollow screw, which is heated in the core tube, possibly also in the screw flights, with thermal oil.
  • the screw trough or the trough can also be double-walled, again for heating with thermal oil, for example, in order to ensure the desired temperature range between 170 ° and 200 ° C.
  • the material is automatically drawn into the melting unit and melted in a defined processing time, which is calculated based on the length of such screw-trough heat exchangers.
  • a plurality of screws connected in parallel or screws arranged in parallel but connected in series can also be provided.
  • a heated press screw for discharging the carrier material constituents from fiber fabric, nonwovens, metal foils or the like enables a high degree of recovery of the reusable materials, in particular the molten bitumen mass, caused by the hydraulic pressure generated by the press screw via openings in the housing wall can be pressed out continuously.
  • the solids can either be used for the production of new products or can also be used as heating material in order to at least partially generate the energies necessary for the combustion.
  • a heated stirring tank is provided, as is continuous filtering, in order to retain coarse solid components that may have been carried along before the liquid bitumen mass is continuously passed through a hot grinding system to the desired fineness of the solid components it contains, which are usually around 100 ⁇ m maximum.
  • Colloid mills and toothed disk mills are suitable as grinding systems, which achieve the desired degree of fineness of the grain Ensure components compared to the usual treatment steps, since the fiber fabrics, nonwovens, metal foils and comparable materials were previously removed from the process.
  • the system generally designated 1 here is supplied with the material to be treated from a pretreatment stage 2 via the mass flow 3, initially into a coarse comminution 4, which can operate in one or two stages.
  • the material leaving the coarse comminution 4 is fed via a melting section 5, which can be designed as a trough-screw heat exchanger, to a separation system 6, which separates the material to be separated, e.g. separates the fiber fabric, fleece inlays, metal foils or the like from the liquid bitumen mass.
  • the solid constituent is drawn off via path 7, and the liquid bitumen mass is fed via strand 8 directly to a buffer container 9, which is designed as a heated stirred tank.
  • a safety filter 10 can be added to the buffer container 9. be switched as shown in the block diagram. From here the bitumen mass is fed to a hot grinding plant 11 and from there to a stacking container 12.
  • bitumen mass can also be circulated, the corresponding circuit line is designated by 13.
  • the material leaves the plant via the stream 14 in order to be supplied to further processing steps, which are not shown here.

Landscapes

  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

A process and plant for treating web-like product waste with at least one meltable component, said process comprising a crushing stage at room temperature, a melting stage and a hot-grinding stage, is to provide a method of optimising a recycling process for such multi-component systems in such a way that it is possible with technically and financially acceptable means to obtain a recycled material which can be directly processed into corresponding webs, e.g. bitumen sealing webs. This is achieved by the process in that coarsely ground material is melted in a continuous process, then freed of the non-meltable components in a heated separator and finally continously filtered as a pressed-out mass.

Description

"Verfahren und Anlage zur Aufbereitung von Abfällen bahnförmiger Produkte mit wenigstens einer schmelzbaren Komponente'"Process and plant for processing waste from web-like products with at least one meltable component '

Die Erfindung richtet sich auf ein Verfahren zur Aufberei¬ tung von Abfällen, insbesondere bahnförmiger Produkte mit wenigstens einer schmelzbaren Komponente, mit einem Zer¬ kleinerungsschritt bei Raumtemperatur, einem Aufschmelz¬ schritt und einem Heißmahlschritt, insbesondere zur Aufbe¬ reitung von armierten Bitumenbahnen-Abfällen.The invention is directed to a process for the treatment of waste, in particular sheet-like products with at least one meltable component, with a shredding step at room temperature, a melting step and a hot grinding step, in particular for the preparation of reinforced bitumen sheet waste.

Derartige Verfahren sind in unterschiedlichen Ausführungen bekannt. So beispielsweise aus der DE-41 28 014-A1 bzw. der darauf fußenden EP-0 531 622-A1. Eine Zerlegung derartiger Reststoffe mit Befreiung von Dämmstoffen u. dgl. zeigt auch die DE-42 27 159-A1, wobei die DD-264 016-A1 die Rückgewin¬ nung von Teer- bzw. Bitumenfraktionen unter Einsatz von Lö¬ sungsmitteln beschreibt.Such methods are known in different versions. For example from DE-41 28 014-A1 or the EP-0 531 622-A1 based on it. A decomposition of such residues with exemption from insulation and. The like also shows the DE-42 27 159-A1, the DD-264 016-A1 describes the recovery of tar or bitumen fractions using solvents.

Bei der gattungsbildenden DE-41 28 014-A1 wird die Aufbe¬ reitung bitumöser Dichtungsmaterialien beschrieben und auch die Herstellung von Produkten aus dem wiedergewonnenen Ma¬ terial, allerdings lassen sich mit dem dort beschriebenen Verfahren keine Dachbahnen aus recyceltem Material herstel¬ len, da sämtliche Bestandteile im Material verbleiben, was bedeutet, daß auch die Fasermaterialien mit übernommen und gemahlen werden. Zerkleinerte Fasermaterialien haben aber bei Dachbahnen die unangenehme Eigenschaft, daß nicht aus- geschlossen werden kann, daß diese Fasern Durchgangskanäle durch die Dachbahnen bilden, wodurch nicht mehr gewährlei¬ stet ist, daß die Bahnen dicht sind. Auch belasten die Ar¬ mierungsmaterialien zusätzlich die Zerkleinerungswerkzeuge, was zu deren beschleunigtem Verschleiß führt.In the generic DE-41 28 014-A1 the preparation of bituminous sealing materials is described and also the production of products from the recovered material, but no roofing membranes can be made from recycled material with the method described there, since all of them Components remain in the material, which means that the fiber materials are also taken over and ground. Crushed fiber materials have the unpleasant property of roofing membranes that it can be concluded that these fibers form through-channels through the roofing sheets, whereby it is no longer guaranteed that the sheets are tight. The reinforcing materials also put additional strain on the comminution tools, which leads to their accelerated wear.

Auch mit den anderen schon erwähnten Lösungen lassen sich Dachbahnen aus Recycelmaterial nicht herstellen, wobei bei der DD-264 016-A1 hinzukommt, daß die dort beschriebene Lö¬ sungstechnologie heute aus Umweltgründen nicht mehr einzu¬ setzen ist.Even with the other solutions already mentioned, roofing membranes cannot be produced from recycled material, with DD-264 016-A1 adding that the solution technology described there can no longer be used today for environmental reasons.

Weitere Lösungen zeigen die GB-1 558 320 oder die US- 4 222 851 bzw. 4 330 340, wobei dort zum Teil sehr aufwen¬ dige Verfahrensschritte beschrieben sind, um das reine Bi¬ tumen wieder zurückzugewinnen.GB-1 558 320 or US Pat. Nos. 4,222,851 or 4,330,340 show further solutions, some of which describe very complex process steps in order to recover the pure bitumen.

Neben den oben beschriebenen Verfahrensweisen stellen sich ähnliche Probleme auch bei der Aufbereitung z.B. von 01- Papieren, wobei die Papierphase von dem Öl getrennt werden soll. Neben diesen StoffSystemen gibt es auch Folien mit aufkaschierten, zum Teil schmelzbare Bestandteile enthalte¬ nen Folien u. dgl., die zurückgewinnbar sind.In addition to the procedures described above, similar problems also arise in reprocessing e.g. of 01-papers, whereby the paper phase is to be separated from the oil. In addition to these material systems, there are also foils with laminated components, some of which contain fusible components, and foils. Like., Which are recoverable.

Aufgabe der Erfindung ist es daher, ein Rückgewinnungsver¬ fahren für solche MehrstoffSysteme so zu optimieren, daß O 97/36725 PC17EP97/01495The object of the invention is therefore to optimize a recovery process for such multi-material systems in such a way that O 97/36725 PC17EP97 / 01495

- 3 -- 3 -

bei anlagetechnisch und wirtschaftlich vertretbaren Aufwen¬ dungen ein Recycelmaterial bereitgestellt wird, welches un¬ mittelbar wieder zu entsprechenden Bahnen, z.B. zu Bitumen¬ dichtungsbahnen, verarbeitet werden kann.in the case of technically and economically justifiable expenditures, a recycled material is provided which is immediately returned to corresponding webs, e.g. can be processed to bitumen sealing membranes.

Bei einem Verfahren der eingangs bezeichneten Art wird die¬ se Aufgabe gemäß der Erfindung dadurch gelöst, daß das bei Umgebungstemperatur grob zerkleinerte Einsatzmaterial im kontinuierlichen Durchlauf aufgeschmolzen und danach in ei¬ ner beheizten Trennvorrichtung von den nicht-schmelzbaren Bestandteilen befreit und als abgepreßte Masse anschließend im kontinuierlichen Durchlauf gefiltert wird, wobei ins¬ besondere bei Bitumenbahnen vorgesehen sein kann, daß das grob zerkleinerte Einsatzmaterial nach dem Aufschmelzen in einer beheizten Trennvorrichtung von den Armierungen bzw. Einlagen aus Fasergewebe, Vliesen oder Metallmaterial be¬ freit und als abgepreßte Bitumenmasse anschließend im kon¬ tinuierlichen Durchlauf gefiltert und einer Heißmahlanlage zugeführt wird.In a method of the type mentioned at the outset, this object is achieved according to the invention in that the feed material which has been roughly comminuted at ambient temperature is melted in a continuous pass and then freed from the non-meltable constituents in a heated separating device and subsequently in the form of a pressed mass continuous flow is filtered, it being possible, in particular in the case of bitumen sheets, for the coarsely comminuted feed material to be freed from the reinforcements or inlays made of fiber fabric, nonwovens or metal material after melting in a heated separating device and then subsequently pressed as a pressed bitumen mass filtered throughput and fed to a hot grinding plant.

Mit der Erfindung ist es möglich, im kontinuierlichen Ver¬ fahren Abfallmaterial, welches bei der Herstellung von bahnartigen Mehrstoffartikeln anfällt, dies gilt insbeson¬ dere auch für die Herstellung von Bitumenbahnen, oder aus Altmaterial, z.B. von Gebäudeab1 issen, einen entsprechenden wertvollen Einsatzstoff zur unmittelbaren Produktion von neuen bahnförmigen Artikeln, wie Bitumendichtungsbahnen, zu gewinnen und ggf. unter Beimischung von Zusatzstoffen einen Einsatzstoff zur Produktion anderer Produkte bereitzustel¬ len.With the invention it is possible in the continuous Ver¬ drive waste material which occurs in the production of sheet-like multicomponent articles, this is insbeson particular also for the production of bituminous membranes or from scrap material, for example issen of Gebäudeab 1, a corresponding valuable feedstock for the immediate production of to win new sheet-like articles, such as bitumen sealing sheets, and, if necessary, to add a feedstock for the production of other products with the addition of additives.

Ausgestaltungen der Erfindung ergeben sich aus den Unter¬ ansprüchen.Embodiments of the invention result from the subclaims.

Zweckmäßig kann es dabei sein, wenn der Aufschmelzschritt in einem beheizten Trog-Schnecken-Wärmeübertrager vorgenom¬ men wird, der beispielsweise mittels Thermalöl beheizt ist, wobei auch die nachfolgend vorgesehene Auspreßeinrichtung entsprechend beheizt werden kann, so daß sich mit einfachen Mitteln ein Arbeitstemperaturbereich von beispielsweise 170° bis 200°C einstellen läßt.It may be expedient if the melting step is carried out in a heated trough-screw heat exchanger which is heated, for example, by means of thermal oil, it also being possible to heat the squeezing device provided accordingly, so that a working temperature range of, for example, can be achieved with simple means Can be set between 170 ° and 200 ° C.

Vorteilhaft wird die abgepreßte Bitumenmasse beispielsweise nach einer Zwischenpufferung in einem beheizten Rührtank zur Vergleichmäßigung des Massenstromes und zur Vermeidung des Trockenlaufens der im hinteren Anlageteil installierten Förderpumpen in einem weiteren Behandlungsschritt einem kontinuierlichen Filterprozeß unterzogen, so daß ggf. noch mitgeschleppte gröbere Festbestandteile ausgeschleust wer¬ den können, bevor die Masse im kontinuierlichen Durchlauf z.B. auf Komponentenabmessungen von maximal ca. 100 μm zer¬ kleinert wird. Hier kann erfindungsgemäß eine Kreislauffüh- rung vorgesehen sein mit einer einmaligen und mehrmaligen Umwälzung.The pressed bitumen mass is advantageously subjected to a continuous filter process in a further treatment step, for example after an intermediate buffering in a heated stirring tank in order to equalize the mass flow and to prevent the feed pumps installed in the rear part of the plant from running dry, so that, if necessary, coarser coarse solid components can also be discharged , before the mass is reduced in a continuous pass, for example to component dimensions of at most approx. 100 μm. According to the invention, a circuit tion should be provided with a single and repeated circulation.

Es versteht sich von selbst, daß in einem beheizbaren Mi¬ scher Zuschlagstoffe je nach Art des gewünschten Produktes zugegeben werden können. Eine Besonderheit der Erfindung kann aber auch darin bestehen, daß dem Material im ersten Aufschmelzschritt flüssiges Frischbitumen zugeführt wird, um eine Vergleichmäßigung der Verfahrensweise zu erreichen, dies kann aber auch zur Reinigung der Anlage vorgesehen sein.It goes without saying that, in a heatable mixer, additives can be added depending on the type of product desired. A peculiarity of the invention can, however, also consist in the fact that liquid fresh bitumen is added to the material in the first melting step in order to achieve a more uniform procedure, but this can also be provided for cleaning the plant.

Zur Lösung der erfindungsgemäßen Aufgabe sieht die Erfin¬ dung auch eine Anlage vor, die sich dadurch auszeichnet, daß als Zerkleinerungsvorrichtung langsam laufende Zweiwel¬ len-Zerkleinerungsmaschinen und als AufSchmelzvorrichtung ein beheizter Trog-Schnecken-Wärmeübertrager vorgesehen sind und daß zwischen der Aufschmelz- und der Heißmahlvor¬ richtung als Abtrenneinrichtung eine geheizte Schnecken¬ presse angeordnet ist.In order to achieve the object according to the invention, the invention also provides a system which is characterized in that two-shaft comminution machines which run slowly as the comminution device and a heated trough-screw heat exchanger are provided as the melting device and in that between the melting and the Hot grinding device, a heated screw press is arranged as a separating device.

Mit einer erfindungsgemaßen Anlage wird insbesondere er¬ reicht, daß die Aufbereitung im kontinuierlichen Durchlauf vorgenommen werden kann. Natürlich wird das Material vor der Behandlung verarbeitungsgerecht vorsortiert, gereinigt und von groben Metallen, wie Blech, Nägeln, Alu-Profilen od. dgl., befreit bevor die erfindungsgemäßen Aufberei- tungsschritte erfolgen.With a plant according to the invention it is achieved in particular that the preparation can be carried out in a continuous pass. Of course, the material is pre-sorted, cleaned and processed from coarse metals such as sheet metal, nails and aluminum profiles before treatment or the like, freed before the preparation steps according to the invention take place.

Zweckmäßig wird die Heizung der Aggregate durch beispiels¬ weise Thermalöle vorgenommen. So kann, wie erfindungsgemäß vorgesehen, die Wärmeübertragung in einem Trog-Schnecken- Übertrager, der als im Dauerbetrieb arbeitende Schmelzma¬ schine eingesetzt wird, erfolgen. Die Schnecke kann als Hohlschnecke ausgebildet sein, die im Kernrohr, ggf. auch in den Schneckengängen, mit Thermalöl beheizt ist. Auch kann die Schneckenwanne bzw. der Trog doppelwandig ausge¬ führt sein, wiederum zur Beheizung mit beispielsweise Ther¬ malöl, um den gewünschten Temperaturbereich zwischen 170° und 200°C zu gewährleisten.The units are expediently heated by thermal oils, for example. Thus, as provided in accordance with the invention, the heat transfer can take place in a trough screw transmitter which is used as a melting machine operating in continuous operation. The screw can be designed as a hollow screw, which is heated in the core tube, possibly also in the screw flights, with thermal oil. The screw trough or the trough can also be double-walled, again for heating with thermal oil, for example, in order to ensure the desired temperature range between 170 ° and 200 ° C.

Durch diese Art der Behandlung über einen beheizten Schnek- kenförderer wird das Material automatisch in das Schmelz¬ aggregat eingezogen und in einer definierten Bearbeitungs¬ zeit aufgeschmolzen, die sich nach der Länge derartiger Schnecken-Trog-Wärmeübertrager errechnet.With this type of treatment using a heated screw conveyor, the material is automatically drawn into the melting unit and melted in a defined processing time, which is calculated based on the length of such screw-trough heat exchangers.

Natürlich können neben einer vergleichsweise langen Schnek- ke auch eine Mehrzahl parallel geschalteter Schnecken oder parallel angeordnete, aber hintereinander geschaltete Schnecken vorgesehen sein. Das Vorsehen einer beheizten Preßschnecke zum Austragen der Trägermaterial-Bestandteile aus Fasergewebe, Vliesstoffen, Metallfolien od. dgl. ermöglicht einen hohen Grad an Rück¬ gewinnung der wiederverwendbaren Materialien, insbesondere der schmelzflüssigen Bitumenmasse, die durch den von der Preßschnecke erzeugten hydraulischen Druck über Öffnungen in der Gehäusewand kontinuierlich ausgepreßt werden kann.Of course, in addition to a comparatively long screw, a plurality of screws connected in parallel or screws arranged in parallel but connected in series can also be provided. The provision of a heated press screw for discharging the carrier material constituents from fiber fabric, nonwovens, metal foils or the like enables a high degree of recovery of the reusable materials, in particular the molten bitumen mass, caused by the hydraulic pressure generated by the press screw via openings in the housing wall can be pressed out continuously.

Die Feststoffe können entweder zur Herstellung neuer Pro¬ dukte herangezogen werden oder aber auch als Heizstoff ver¬ wendet werden, um ggf- die für die Verbrennung notwendigen Energien wenigstens teilweise zu erzeugen.The solids can either be used for the production of new products or can also be used as heating material in order to at least partially generate the energies necessary for the combustion.

Erfindungsgemäß ist auch vorgesehen, daß zur Vergleichmäßi¬ gung des Massenstromes und/oder zur Vermeidung des Trocken¬ laufens nachgeschalteter Anlageteile, insbesondere nachge¬ schalteter Förderpumpen, ein beheizter Rührtank vorgesehen ist ebenso wie eine kontinuierliche Filterung, um evtl. noch mitgeschleppte gröbere Festbestandteile zurückzuhal¬ ten, bevor die flüssige Bitumenmasse im kontinuierlichen Durchlauf durch eine Heißmahlanlage auf die gewünschte Feinheit der enthaltenen festen Komponenten gebracht wird, die üblicherweise bei maximal ca. 100 μm liegen.According to the invention, it is also provided that, in order to equalize the mass flow and / or to avoid the dry running of downstream system parts, in particular downstream pumping systems, a heated stirring tank is provided, as is continuous filtering, in order to retain coarse solid components that may have been carried along before the liquid bitumen mass is continuously passed through a hot grinding system to the desired fineness of the solid components it contains, which are usually around 100 μm maximum.

Als Mahlanlagen bieten sich Kolloid-Mühlen und Zahnschei¬ ben-Mühlen an, die den angestrebten Feinheitsgrad der Korn- ponenten gegenüber den üblichen Behandlungsschritten ge¬ währleisten, da die Fasergewebe, Vliesstoffe, Metallfolien und vergleichbare Materialien vorher dem Prozeß entzogen wurden.Colloid mills and toothed disk mills are suitable as grinding systems, which achieve the desired degree of fineness of the grain Ensure components compared to the usual treatment steps, since the fiber fabrics, nonwovens, metal foils and comparable materials were previously removed from the process.

Die Erfindung ist nachstehend anhand der Zeichnung bei¬ spielsweise näher erläutert, die in vereinfachter Darstel¬ lung das Fließbild einer erfindungsgemäßen Anlage zeigt.The invention is explained in more detail below with reference to the drawing, for example, which shows the flow diagram of a system according to the invention in a simplified representation.

Der hier allgemein mit 1 bezeichneten Anlage wird das zu behandelnde Material aus einer Vorbehandlungsstufe 2 über den Massenstrom 3 zugeführt, und zwar zunächst in eine Grobzerkleinerung 4, die sowohl einstufig als auch zweck¬ mäßig zweistufig arbeiten kann.The system generally designated 1 here is supplied with the material to be treated from a pretreatment stage 2 via the mass flow 3, initially into a coarse comminution 4, which can operate in one or two stages.

Das die Grobzerkleinerung 4 verlassende Material wird über eine Aufschmelzstrecke 5, die als Trog-Schnecken-Wärmeüber¬ trager ausgebildet sein kann, einer Trennanlage 6 zuge¬ führt, die das abzutrennende Material, z.B. das Fasergewe¬ be, Vlieseinlagen, Metallfolien od. dgl., von der flüssigen Bitumenmasse trennt. Der Feststoffbestandteil wird über den Weg 7 abgezogen, die flüssige Bitumenmasse über den Strang 8 unmittelbar einem Pufferbehälter 9, der als beheizter Rührtank ausgebildet ist, zugeführt.The material leaving the coarse comminution 4 is fed via a melting section 5, which can be designed as a trough-screw heat exchanger, to a separation system 6, which separates the material to be separated, e.g. separates the fiber fabric, fleece inlays, metal foils or the like from the liquid bitumen mass. The solid constituent is drawn off via path 7, and the liquid bitumen mass is fed via strand 8 directly to a buffer container 9, which is designed as a heated stirred tank.

Dem Pufferbehälter 9 kann ein Sicherheitsfilter 10 nachge- schaltet sein, wie dies in dem Prinzipschaltbild wiederge¬ geben ist. Von hier aus wird die Bitumenmasse einer Hei߬ mahlanlage 11 zugeführt und von dort einem Stapelbehälter 12.A safety filter 10 can be added to the buffer container 9. be switched as shown in the block diagram. From here the bitumen mass is fed to a hot grinding plant 11 and from there to a stacking container 12.

Wie gestrichelt in der Figur dargestellt, kann die Bitumen¬ masse auch im Kreislauf geführt werden, die entsprechende Kreislaufleitung ist mit 13 bezeichnet. Schließlich verläßt das Material über den Strom 14 die Anlage, um weiteren, hier nicht näher dargestellten Verarbeitungsschritten zuge¬ führt zu werden. As shown in dashed lines in the figure, the bitumen mass can also be circulated, the corresponding circuit line is designated by 13. Finally, the material leaves the plant via the stream 14 in order to be supplied to further processing steps, which are not shown here.

Claims

Patentansprüche; Claims; 1. Verfahren zur Aufbereitung von Abfällen, insbesondere bahn¬ förmiger Produkte mit wenigstens einer schmelzbaren Kompo¬ nente, mit einem Zerkleinerungsschritt bei Raumtemperatur, einem Aufschmelzschritt und einem Heißmahlschritt, dadurch gekennzeichnet, daß das bei Umgebungstemperatur grob zerkleinerte Einsatz¬ material im kontinuierlichen Durchlauf aufgeschmolzen und danach in einer beheizten Trennvorrichtung von den nicht¬ schmelzbaren Bestandteilen befreit und als abgepreßte Masse anschließend im kontinuierlichen Durchlauf gefiltert wird.1. A process for the treatment of waste, in particular web-shaped products with at least one fusible component, with a comminution step at room temperature, a melting step and a hot milling step, characterized in that the feed material coarsely comminuted at ambient temperature is melted in a continuous pass and then freed from the non-meltable constituents in a heated separation device and then filtered as a pressed mass in a continuous pass. 2. Verfahren nach Anspruch 1 zur Aufbereitung von armierten Bitumenbahnen-Abfällen, dadurch gekennzeichnet, daß das grob zerkleinerte Einsatzmaterial nach dem Auf¬ schmelzen in einer beheizten Trennvorrichtung von den Ar¬ mierungen bzw. Einlagen aus Fasergewebe, Vliesen oder Me¬ tallmaterial befreit und als abgepreßte Bitumenmasse an¬ schließend im kontinuierlichen Durchlauf gefiltert und ei¬ ner Heißmahlanlage zugeführt wird.2. The method according to claim 1 for the processing of reinforced bitumen web waste, characterized in that the coarsely comminuted feed after melting in a heated separating device from the reinforcements or deposits made of fiber fabric, nonwovens or metal material and freed as the pressed bitumen mass is then filtered in a continuous pass and fed to a hot grinding plant. 3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Aufschmelzschritt in einem beheizten Trog-Schnecken- Wärmeübertrager vorgenommen wird.3. The method according to claim 1 or 2, characterized in that the melting step is carried out in a heated trough screw heat exchanger. 4. Verfahren nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die Abtrennung der Armierungs- bzw. Einlagematerialien in einer geheizten Schneckenpresse vorgenommen wird.4. The method according to any one of the preceding claims, characterized in that the separation of the reinforcement or insert materials is carried out in a heated screw press. 5. Verfahren nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß eine Mehrzahl von parallel und/oder hintereinander an¬ geordneten Schnecken eingesetzt wird.5. The method according to any one of the preceding claims, characterized in that a plurality of screws arranged in parallel and / or one behind the other is used. 6. Verfahren nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß das die Schneckenpresse schmelzflüssig verlassende Bi¬ tumenmaterial einmal bzw. mehrmals im Kreislauf dem Hei߬ mahlschritt unterzogen wird.6. The method according to any one of the preceding claims, characterized in that the bi-tumen material leaving the screw press in molten form is subjected to the hot milling step once or several times in a cycle. 7. Verfahren nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß dem aus dem Heißmahlschritt kommenden Material weitere Zusatzstoffe zugemischt werden.7. The method according to any one of the preceding claims, characterized in that the material coming from the hot grinding step further additives are mixed. 8. Verfahren nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß dem Material im Aufschmelzschritt flüssiges Frischbitu¬ men zugeführt wird.8. The method according to any one of the preceding claims, characterized in that liquid fresh bitumen is supplied to the material in the melting step. 9. Anlage zur Durchführung des Verfahrens nach einem der An¬ sprüche 1 bis 8, insbesondere zur Aufbereitung von armier¬ ten Bitumenbahnen-Abfällen oder anderer, mit wenigstens ei¬ ner aufschmelzbaren Beschichtung versehenen bandförmigen Abfällen, mit einer Zerkleinerungsvorrichtung, einer Auf- schmelzvorrichtung und einer Heißmahlvorrichtung, dadurch gekennzeichnet, daß als Zerkleinerungsvorrichtung (4) langsam laufende Zweiwellen-Zerkleinerungsmaschinen und als Aufschmelzvor- richtung (5) ein beheizter Trog-Schnecken-Wärmeübertrager vorgesehen sind und daß zwischen der Aufschmelz- (5) und der Heißmahlvorrichtung (11) als Abtrenneinrichtung (6) eine geheizte Schneckenpresse angeordnet ist.9. Plant for carrying out the method according to one of claims 1 to 8, in particular for processing armored bitumen sheet wastes or other band-shaped wastes provided with at least one meltable coating, with a comminution device, a melting device and a hot grinding device, characterized in that as the shredding device (4) slowly running two-shaft shredding machines and as the melting device (5) a heated trough screw heat exchanger are provided and that between the melting (5) and the hot grinding device (11) as Separating device (6) a heated screw press is arranged. 10. Anlage nach Anspruch 9, dadurch gekennzeichnet, daß der Schneckenpresse (6) ein Pufferbehälter (9), vor¬ zugsweise ein beheizter Rührtank, und/oder ein Sicherheits¬ filter (10) nachgeordnet sind.10. Plant according to claim 9, characterized in that the screw press (6) a buffer tank (9), preferably a heated stirred tank, and / or a Sicherheits¬ filter (10) are arranged downstream. 11. Anlage nach Anspruch 9 oder 10, dadurch gekennzeichnet, daß der AufSchmelzvorrichtung (5) eine Einrichtung zur Zu- führung von Frischbitumen und/oder Additiven zugeordnet ist. 11. Plant according to claim 9 or 10, characterized in that the melting device (5) has a device for supplying management of fresh bitumen and / or additives is assigned.
PCT/EP1997/001495 1996-04-01 1997-03-25 Process and plant for treating web-like product waste with at least one meltable component Ceased WO1997036725A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP97915424A EP0892706A1 (en) 1996-04-01 1997-03-25 Process and plant for treating web-like product waste with at least one meltable component
AU22911/97A AU2291197A (en) 1996-04-01 1997-03-25 Process and plant for treating web-like product waste with at least one meltable component

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19612971.0 1996-04-01
DE1996112971 DE19612971C1 (en) 1996-04-01 1996-04-01 Continuous processing of reinforced bitumen waste

Publications (1)

Publication Number Publication Date
WO1997036725A1 true WO1997036725A1 (en) 1997-10-09

Family

ID=7790130

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1997/001495 Ceased WO1997036725A1 (en) 1996-04-01 1997-03-25 Process and plant for treating web-like product waste with at least one meltable component

Country Status (4)

Country Link
EP (1) EP0892706A1 (en)
AU (1) AU2291197A (en)
DE (1) DE19612971C1 (en)
WO (1) WO1997036725A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0988952A1 (en) * 1998-09-22 2000-03-29 Performance Roof Systems S.A. en abrégé P.R.S. Process for recycling a membrane and extruder therefor
NL1011106C2 (en) * 1999-01-21 2000-07-24 Modiglass Modified Asphalt Method and device for recycling bitumen-containing materials, more in particular bituminous roofing materials.
WO2021213792A1 (en) * 2020-04-22 2021-10-28 Soprema Installation and method for treating composite materials based on thermoplastic materials

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1005029C2 (en) * 1997-01-17 1998-07-20 Modiglass Modified Asphalt Method and device for recycling bitumen-containing materials, more in particular bituminous roofing materials.
DE10031047C2 (en) * 2000-06-26 2003-05-15 Hamme Christina Method and device for producing a free-flowing bulk material
NL1029511C2 (en) * 2005-07-13 2007-01-16 Esha Group B V Method and device for recycling bituminous roofing waste, as well as mass obtained by such a method and casting formed from such a mass.
DE102006004148B4 (en) * 2006-01-27 2010-07-29 Rco Recycling-Centrum Gmbh Process and recycling plant for recycling bituminous materials and novel bitumen material
FR2904976A1 (en) * 2006-08-16 2008-02-22 Ab2A Sarl Recycling bitumen sheets comprises attaining sufficient temperature of bitumen sheets to form liquid, horizontally pressing the sheets to expel maximum of bitumen and to prevent sliding of a sheet framework
NL1033423C2 (en) * 2007-02-19 2008-08-20 Esha Group B V Device and method for recycling bituminous roofing waste.

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5431488A (en) * 1977-08-15 1979-03-08 Japan Synthetic Rubber Co Ltd Treatment of rubber
US4269693A (en) * 1978-05-30 1981-05-26 Hastie Anthony M B Process for recovering bitumen from waste bituminous products
SU907042A1 (en) * 1979-12-20 1982-02-23 Ленинградский Ордена Октябрьской Революции И Ордена Трудового Красного Знамени Технологический Институт Им Ленсовета Coating composition
JPS5927007A (en) * 1982-08-04 1984-02-13 株式会社千代田ア−ル・アンド・デイ Forcible air stream melting method of asphalt waste material
JPS5976302A (en) * 1982-10-22 1984-05-01 株式会社渡辺組 Warm water type asphalt regenerating apparatus
JPH02144187A (en) * 1988-11-22 1990-06-01 Kyushu Nozawa Kk Treatment equipment of waste asphalt aggregate
JPH04227095A (en) * 1990-06-01 1992-08-17 Nakage:Kk Treatment of industrial waste and resin concrete product
JPH04319409A (en) * 1991-04-17 1992-11-10 Akashi Tokushu Bosui Kogyo Kk Material manufactured from waste material as raw material and manufacture thereof
DE4128014A1 (en) * 1991-08-23 1993-02-25 Ruetgerswerke Ag METHOD FOR THE REUSE OF RESIDUES OF BITUMINOUS SEALING MATERIALS
DE4329459A1 (en) * 1993-09-01 1995-03-02 Leuna Werke Gmbh Bitumen modifier, and process for the preparation thereof
US5518606A (en) * 1994-08-01 1996-05-21 Phillips Petroleum Company Method for treating pitch

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4330340A (en) * 1978-03-07 1982-05-18 Carlton Wayne H Process to recycle bituminous roofing refuse into solid fuel and other energy-related products
US4222851A (en) * 1978-11-06 1980-09-16 Dravo Corporation Recovery of asphalt shingle components by solvent extraction
DD264016A1 (en) * 1987-07-17 1989-01-18 Fahlberg List Veb METHOD FOR RECOVERING TEAR OR BITUMEN FRACTIONS
DE4227159A1 (en) * 1992-08-17 1994-02-24 Ruetgerswerke Ag Process for the preparation of residues of bituminous roof waterproofing

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5431488A (en) * 1977-08-15 1979-03-08 Japan Synthetic Rubber Co Ltd Treatment of rubber
US4269693A (en) * 1978-05-30 1981-05-26 Hastie Anthony M B Process for recovering bitumen from waste bituminous products
SU907042A1 (en) * 1979-12-20 1982-02-23 Ленинградский Ордена Октябрьской Революции И Ордена Трудового Красного Знамени Технологический Институт Им Ленсовета Coating composition
JPS5927007A (en) * 1982-08-04 1984-02-13 株式会社千代田ア−ル・アンド・デイ Forcible air stream melting method of asphalt waste material
JPS5976302A (en) * 1982-10-22 1984-05-01 株式会社渡辺組 Warm water type asphalt regenerating apparatus
JPH02144187A (en) * 1988-11-22 1990-06-01 Kyushu Nozawa Kk Treatment equipment of waste asphalt aggregate
JPH04227095A (en) * 1990-06-01 1992-08-17 Nakage:Kk Treatment of industrial waste and resin concrete product
JPH04319409A (en) * 1991-04-17 1992-11-10 Akashi Tokushu Bosui Kogyo Kk Material manufactured from waste material as raw material and manufacture thereof
DE4128014A1 (en) * 1991-08-23 1993-02-25 Ruetgerswerke Ag METHOD FOR THE REUSE OF RESIDUES OF BITUMINOUS SEALING MATERIALS
DE4329459A1 (en) * 1993-09-01 1995-03-02 Leuna Werke Gmbh Bitumen modifier, and process for the preparation thereof
US5518606A (en) * 1994-08-01 1996-05-21 Phillips Petroleum Company Method for treating pitch

Non-Patent Citations (9)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Section Ch Week 7916, Derwent World Patents Index; Class A, AN 79-30406B (16), XP002034828 *
DATABASE WPI Section Ch Week 8251, Derwent World Patents Index; Class C08, AN 82-11038J (51), XP002034825 *
DATABASE WPI Section Ch Week 8412, Derwent World Patents Index; Class LQ, AN 84-072083 (12), XP002034826 *
DATABASE WPI Section Ch Week 8423, Derwent World Patents Index; Class HQ, AN 84-143804 (23), XP002034827 *
DATABASE WPI Section Ch Week 9239, Derwent World Patents Index; Class ALP, AN 92-320872 (39) *
DATABASE WPI Section Ch Week 9251, Derwent World Patents Index; Class AL, AN 92-421718 (51) *
PATENT ABSTRACTS OF JAPAN vol. 14, no. 386 (C - 0750) 21 August 1990 (1990-08-21) *
PATENT ABSTRACTS OF JAPAN vol. 16, no. 575 (C - 1011) 15 December 1992 (1992-12-15) *
PATENT ABSTRACTS OF JAPAN vol. 17, no. 144 (M - 1386) 23 March 1993 (1993-03-23) *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0988952A1 (en) * 1998-09-22 2000-03-29 Performance Roof Systems S.A. en abrégé P.R.S. Process for recycling a membrane and extruder therefor
WO2000016955A1 (en) * 1998-09-22 2000-03-30 Performance Roof Systems S.A. Method for recycling a membrane and extruding machine for implementing said method
NL1011106C2 (en) * 1999-01-21 2000-07-24 Modiglass Modified Asphalt Method and device for recycling bitumen-containing materials, more in particular bituminous roofing materials.
WO2000043184A1 (en) * 1999-01-21 2000-07-27 Modiglass Modified Asphalt- Und Glassmatmachines Ltd. Method and apparatus for the recycling of bituminous materials, more in particular of bituminous roofing materials
WO2021213792A1 (en) * 2020-04-22 2021-10-28 Soprema Installation and method for treating composite materials based on thermoplastic materials
FR3109534A1 (en) * 2020-04-22 2021-10-29 Soprema Installation and process for the treatment of composite products based on thermoplastic materials
US12257742B2 (en) 2020-04-22 2025-03-25 Soprema Installation and method for treating composite materials based on thermoplastic materials

Also Published As

Publication number Publication date
AU2291197A (en) 1997-10-22
EP0892706A1 (en) 1999-01-27
DE19612971C1 (en) 1997-06-26

Similar Documents

Publication Publication Date Title
DE69422933T2 (en) DEVICE FOR TREATING PROCESS MATERIAL, E.g. WASTE
EP0859693B1 (en) Process and device for the processing of building components from mixed plastics materials and other building materials mixed therewith and the use thereof
EP2419255B1 (en) Method and apparatus for recycling plastic materials
DE2335385C3 (en)
DE60300809T2 (en) Apparatus for recovering plasterboard
EP1813360B1 (en) Method and installation for the recycling of materials containing bitumen and manufactured bitumen material
WO2010052016A2 (en) Method for separating individual valuable materials from mixed, in particular milled, plastic waste
DD255888A5 (en) METHOD AND DEVICE FOR PREPARING HOUSEHOLDS, TISSUE AND OTHER DGL. WASTE
EP0892706A1 (en) Process and plant for treating web-like product waste with at least one meltable component
EP0791396B1 (en) Effective sorting of plastics
EP3973092A1 (en) Method and device for regenerating a solvent of cellulose from a spinning process
DE3323161A1 (en) Device for the thermal decomposition of polymeric materials
EP0531622B1 (en) Method for recycling waste products of bituminous waterproofing materials
DE2719792A1 (en) TREATMENT FACILITY FOR WASTE MATERIALS
DE4106812C2 (en) Process for recovering the constituents of materials present in the form of a composite of at least two firmly bonded layers of different plastics, and arrangements for carrying out the process
DE4446129A1 (en) Processing of wet particulate material
DE10100896C1 (en) Air extraction, from oriented strand board press, has a sieve to separate gas/solid phase from liquid in suction lines and grinder and sieve following cyclone separator for trouble-free disposal of impurities in extracted air
DE4218443C2 (en) Process for material recycling of interior trim parts of vehicles
EP1757672B1 (en) Process for treating bituminous composite material
DE102006012521B3 (en) Method and device for producing shaped articles, in particular sheets, from lignocellulose-containing fibers
EP0027277A1 (en) Methods for manufacturing mineral-wool mats or slaps and equipment for carrying them out
WO2003010371A2 (en) Method and device for classifying valuable material comprising at least one fibrous fraction
EP0074346A2 (en) Method and plant for comminuting and cleaning plastics waste materials, particularly plastics sheets
EP0594165A1 (en) Method for the recycling of thermoplastic waste and plant for carrying out this method
DE19507513A1 (en) Recovering plastic and metal from scrap insulated cables

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AL AM AU AZ BB BG BR BY CA CN CZ EE GE HU IS JP KE KG KP KR KZ LK LR LS LT LV MD MG MK MN MW MX NO NZ PL RO RU SD SG SI SK TJ TM TR TT UA UG US UZ VN AM AZ BY KG KZ MD RU TJ TM

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH KE LS MW SD SZ UG AT BE CH DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN ML MR NE SN TD TG

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
WWE Wipo information: entry into national phase

Ref document number: 1997915424

Country of ref document: EP

NENP Non-entry into the national phase

Ref country code: JP

Ref document number: 97534896

Format of ref document f/p: F

WWP Wipo information: published in national office

Ref document number: 1997915424

Country of ref document: EP

NENP Non-entry into the national phase

Ref country code: CA

WWW Wipo information: withdrawn in national office

Ref document number: 1997915424

Country of ref document: EP