[go: up one dir, main page]

EP1663941A1 - Produit intermediaire a base d'un melange de carbonates et de carbamates organiques et procede de preparation correspondant - Google Patents

Produit intermediaire a base d'un melange de carbonates et de carbamates organiques et procede de preparation correspondant

Info

Publication number
EP1663941A1
EP1663941A1 EP04820943A EP04820943A EP1663941A1 EP 1663941 A1 EP1663941 A1 EP 1663941A1 EP 04820943 A EP04820943 A EP 04820943A EP 04820943 A EP04820943 A EP 04820943A EP 1663941 A1 EP1663941 A1 EP 1663941A1
Authority
EP
European Patent Office
Prior art keywords
ammonia
carbamates
mixture
carbon atoms
general formula
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.)
Withdrawn
Application number
EP04820943A
Other languages
German (de)
English (en)
Inventor
Henning Buchold
Jürgen EBERHARDT
Ulrich Wagner
Hans-Jürgen WÖLK
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.)
Air Liquide Global E&C Solutions Germany GmbH
Original Assignee
Lurgi GmbH
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 Lurgi GmbH filed Critical Lurgi GmbH
Publication of EP1663941A1 publication Critical patent/EP1663941A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G65/00—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
    • C08G65/02—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring
    • C08G65/32—Polymers modified by chemical after-treatment
    • C08G65/321—Polymers modified by chemical after-treatment with inorganic compounds
    • C08G65/324—Polymers modified by chemical after-treatment with inorganic compounds containing oxygen
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C68/00—Preparation of esters of carbonic or haloformic acids
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C69/00—Esters of carboxylic acids; Esters of carbonic or haloformic acids
    • C07C69/96—Esters of carbonic or haloformic acids
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D323/00—Heterocyclic compounds containing more than two oxygen atoms as the only ring hetero atoms
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G65/00—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
    • C08G65/02—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring
    • C08G65/32—Polymers modified by chemical after-treatment
    • C08G65/321—Polymers modified by chemical after-treatment with inorganic compounds
    • C08G65/325—Polymers modified by chemical after-treatment with inorganic compounds containing nitrogen
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L71/00—Compositions of polyethers obtained by reactions forming an ether link in the main chain; Compositions of derivatives of such polymers
    • C08L71/02—Polyalkylene oxides

Definitions

  • the invention relates to an intermediate product consisting of a mixture of organic carbonates and carbamates, which is a valuable starting material for the production of organic carbonates, and a method for producing this intermediate product.
  • Dimethyl carbonate and diphenyl carbonate are intermediates in the chemical industry that are used in a wide range of applications.
  • Dimethyl carbonate is a starting material for aromatic polycarbonates.
  • Dimethyl carbonate is transesterified with phenol to give diphenyl carbonate and converted to aromatic polycarbonate in a melt polymerization with bisphenol (Daniele Delledonne; Franco Rivetti; Ugo Romano: "Developments in the production and application of dimethyl carbonate” Applied Catalysis A: General 221 (2001) 241 - 251).
  • Dimethyl carbonate can be used to improve the octane number of gasoline and replace environmentally problematic additives such as MTBE (Michael A. Pacheco; Christopher L.
  • Dimethyl carbonate has a number of applications in chemical synthesis. At temperatures at or below the boiling point of 90 ° C dimethyl carbonate can be used as a methoxylating agent. At higher temperatures around 160 ° C dimethyl carbonate can be used as a methylating agent (Pietro Tundi; Maurizio Selva: "The Chemistry of Dimethyl Carbonate” Acc. Chem. Res. 35 (2002) 706 - 716).
  • the main process currently used is the reaction of methanol with carbon monoxide and oxygen on a copper chloride contact, described in US Pat. No. 5,210,269 by Enichem (1993). This oxidative carbonylation proceeds via copper methoxy chloride and a subsequent reaction with carbon monoxide to give dimethyl carbonate.
  • the main problem with this process is the deactivation of the catalyst by water. The deactivated catalyst has to be regenerated at great expense or the water content in the reactor has to be kept low.
  • a variant of the oxidative carbonylation is a two-step reaction over methyl nitrite.
  • methyl nitrite is synthesized from methanol, nitrogen monoxide and oxygen, with water being a by-product.
  • gaseous methyl nitrite is reacted with CO in a fixed bed reactor on a palladium chloride catalyst to give dimethyl carbonate; the resulting NO is circulated.
  • This method has the disadvantage that handling corrosive nitric oxide is dangerous.
  • Another possibility for the production of dimethyl carbonate is the transesterification of a cyclic carbonate with methanol.
  • the direct alcoholysis of urea with methanol is another possibility for the production of dimethyl carbonate.
  • the synthesis proceeds in two steps via the methyl carbamate to the dimethyl carbonate.
  • the reaction rate is strongly inhibited by the ammonia formed.
  • chemical and physical methods have been proposed to remove the ammonia formed.
  • a cyclic carbonate (US 5,489,702 Mitsubishi Gas Chemical 1996; US 5,349,077; Mitsubishi Gas Chemical 1994).
  • a diol is reacted with urea and a cyclic alkylene carbonate with 5 or 6 ring atoms is synthesized.
  • the alkylene carbonate is transesterified with methanol. The diol can then be circulated.
  • the intermediate products produced in the alcoholysis must then be transesterified with methanol in order to obtain the dimethyl carbonate as a product.
  • the transesterification is a catalyzed reaction.
  • Basic alkali and alkaline earth metals or oxides are used as heterogeneous catalysts. Examples of alkali or alkaline earth metals in zeolites are in US 6,365,767 Exxon, examples of metal oxides are mentioned in US 6,207,850 Mobil Oil.
  • Ammonia is split off during the reaction and has to be removed.
  • ammonia can be removed from the reaction mixture by various methods, but in the processes known from the prior art, a solid to be disposed of is formed or a large part of the methanol used is also discharged. - Large amounts of methanol must be circulated.
  • a process developed for DMC cannot easily be extended to the synthesis of other carbonates.
  • the intermediate product is a mixture of organic carbonates and carbamates, which are obtained by reacting urea, a substituted urea, a salt or ester of carbamic acid or one of its N-substituted derivatives (alkyl, aryl residues such as methyl, ethyl, Phenyl-, benzyl-)
  • polymeric polyfunctional alcohols such as polyalkylene glycols, polyester polyols or polyether polyols of the general formula I
  • the process according to the invention for producing a mixture of organic carbonates and carbamates consists in that urea, a substituted urea, a salt or ester of carbamic acid or one of its N-substituted derivatives (alkyl, aryl residues such as methyl, ethyl , Phenyl, benzyl)
  • polymeric polyfunctional alcohols such as polyalkylene glycols, polyester polyols or polyether polyols of the general formula I
  • polymeric alcohols polyols
  • Polyols polymeric alcohols
  • Polyols have a significantly higher boiling point than the monoalcohols, diols and the carbonates and carbamates formed therefrom which have been described in the prior art.
  • This is not possible when using the methods known from the prior art, since, during stripping, high proportions of the alcohols used there and of the glycol carbonate or diol carbonate are also expelled from the reaction mixture.
  • polymeric alcohols Due to their water-like polar structure, polymeric alcohols have a higher solubility for urea, substituted ureas, salts and esters of carbamic acid and their N-substituted derivatives than the long-chain monoalcohols or diols previously used, so that the reactions are carried out in a homogeneous solution can be.
  • the solubility and at the same time the boiling point of the mixture can be set in a targeted manner.
  • polymeric alcohols are still liquid at temperatures at which comparatively long monoalcohols or diols are already solid.
  • auxiliaries have an adjustable viscosity, are not very corrosive and are therefore particularly suitable for a circulatory procedure. Furthermore, they are non-toxic and therefore environmentally neutral
  • Polymeric alcohols have a significantly higher chemical, thermal and mechanical stability than the substances previously used, which is a great advantage for recycling (recycling) of these alcohols after the recovery in the second stage, since the losses of polymeric alcohols due to decomposition - or thermal cracking processes are minimal. • Normally, one would not think of using polymeric alcohols for the purpose of intermediate product formation, because polymeric alcohols are multi-component mixtures that are more difficult to process than pure auxiliaries. The multicomponent mixture resulting from the use of polymeric alcohols generally presents difficulties during further processing. However, it is precisely through the use of polymeric alcohols that a procedural advantage can be achieved.
  • the intermediate products obtained have high boiling points, which means that a broad, technically usable range for the free adjustment of pressure and temperature is available to adapt to the production of various organic carbonates or carbamates;
  • - High conversions and yields through simultaneous removal (stripping with gas and / or steam or application of vacuum) of the ammonia formed during the reaction with minimal losses of alcohols, carbonates and carbamates.
  • the reaction does not require a catalyst. However, a further increase in the reaction rate can be achieved by using basic catalysts.
  • the process according to the invention is advantageously carried out at temperatures between 100 and 270 ° C.
  • the process is carried out under normal pressure or reduced pressure and metering in a gas or vapor suitable for expelling the ammonia formed in the presence of catalysts.
  • Alkaline salts, oxides, hydroxides, alcoholates of the first and second main groups or the 1st to 8th subgroups of the periodic table, basic zeolites or polymeric ion exchangers are suitable as catalysts for this.
  • magnesium or zinc catalysts which can be used both as oxide or as acetate, are catalytically active.
  • An important influencing factor is the removal of the ammonia by stripping with gas, steam or vacuum.
  • the mixture prepared in accordance with the invention can be reacted further, for example by transesterification with an alcohol or with a phenol in the presence of a basic catalyst in order to produce an organic carbonate.
  • the invention is illustrated in detail by the experiments below. Experimental setup and implementation
  • Polyethylene glycol is suitable as a reactant because it has a number of interesting properties. In principle, the reaction of this dihydric alcohol with urea can produce two products. These two long chain carbonates are:
  • the catalysts mentioned in the patent literature comprise a number of metal oxides. Powdery oxides and acetates were used in the experiments carried out according to the invention. These were used in mass ratios between 5 and 25 percent by weight. Titanium dioxide, zinc oxide, magnesium oxide and magnesium acetate have been investigated as possible catalysts.
  • the main influencing parameters for the reaction of urea with polyethylene glycol were identified as expulsion of the ammonia formed from the reaction mixture by vacuum or stripping with nitrogen. Working under vacuum was investigated with two tests at a pressure of 300 mbar. A noticeable improvement in the conversion behavior compared to the reaction without expelling the ammonia formed at ambient pressure was found. Even better results were obtained when the reaction mixture was gassed with nitrogen. A variation of the volume flow showed a clear influence on the conversion of urea with polyethylene glycol.
  • the process according to the invention makes it possible to obtain a mixture of high molecular weight organic carbonates and carbamates which are used as auxiliaries or intermediates for a number of chemical syntheses, e.g. can be used for the production of organic carbonates.
  • volume flow of the stripping gas An important influencing variable for achieving high sales is the volume flow of the stripping gas. If the volume flow is sufficiently high, the removal of the ammonia is no longer the rate-determining step.
  • reaction of the mixture of carbonates or carbamates of the polymeric alcohols with methanol produced in the first stage proceeds relatively quickly with a basic catalyst when a slightly increased pressure of about 6 bar is used at a temperature of about 140 ° C.
  • the balance is set in less than 1 hour in batch mode.
  • a catalyst a quaternary ammonium salt was used, which showed good catalytic properties. Even higher reaction rates were achieved by using magnesium methylate.
  • the polymeric alcohol used as the auxiliary alcohol is returned to the first process stage after separation of the diethyl arbonate or the diphenyl carbonate.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Inorganic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
  • Heterocyclic Compounds That Contain Two Or More Ring Oxygen Atoms (AREA)

Abstract

L'invention concerne un produit intermédiaire comprenant un mélange de carbonates et de carbamates organiques, ainsi qu'un procédé permettant de le produire. Selon ce procédé, il est prévu de faire réagir de l'urée, une urée substituée, un sel ou un ester d'acide carbamidique ou un de ses dérivés N-substitués, dans un polyalkylène glycol, un polyester-polyol ou un polyéther-polyol de formule générale (I), dans laquelle R désigne un groupe alkylène à chaîne linéaire ou ramifiée ayant entre 2 et 12 atomes de carbone et n désigne un nombre compris entre 2 et 20 ; ou dans un polyvinylalcool entièrement ou partiellement hydrolysé, de formule générale (II), dans laquelle R' désigne un groupe alkyle, aryle ou acyle ayant entre 1 et 12 atomes de carbone, p et q désignent des nombres compris entre 1 et 20 ; ou dissous dans des mélanges desdits composés, avec un catalyseur alcalin favorisant la séparation d'ammoniac, pour former un mélange de carbonates et de carbamates. L'ammoniac libéré à cette occasion ou l'amine provenant du mélange réactionnel est éliminé(e) par un gaz séparateur.
EP04820943A 2003-09-11 2004-07-16 Produit intermediaire a base d'un melange de carbonates et de carbamates organiques et procede de preparation correspondant Withdrawn EP1663941A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10341952A DE10341952B4 (de) 2003-09-11 2003-09-11 Zwischenprodukt bestehend aus einer Mischung von organischen Carbonaten und Carbamaten und ein Verfahren zu seiner Herstellung
PCT/EP2004/007912 WO2005066111A1 (fr) 2003-09-11 2004-07-16 Produit intermediaire a base d'un melange de carbonates et de carbamates organiques et procede de preparation correspondant

Publications (1)

Publication Number Publication Date
EP1663941A1 true EP1663941A1 (fr) 2006-06-07

Family

ID=34428077

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04820943A Withdrawn EP1663941A1 (fr) 2003-09-11 2004-07-16 Produit intermediaire a base d'un melange de carbonates et de carbamates organiques et procede de preparation correspondant

Country Status (6)

Country Link
US (1) US20070252106A1 (fr)
EP (1) EP1663941A1 (fr)
JP (1) JP2007505053A (fr)
CN (1) CN1849290B (fr)
DE (1) DE10341952B4 (fr)
WO (1) WO2005066111A1 (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004040193B3 (de) * 2004-08-19 2005-10-27 Lurgi Ag Verfahren zur Herstellung von Carbamidsäureestern
AT509621B1 (de) * 2010-03-23 2012-04-15 Univ Innsbruck Verfahren zur herstellung eines stickstoffenthaltenden polysaccharids
EP2679573B1 (fr) * 2012-06-29 2017-12-27 SABIC Global Technologies B.V. Procédé et appareil pour la séparation de diakyle carbonate, eau et alcane
US9822280B2 (en) 2013-06-18 2017-11-21 Dow Global Technologies Llc Crosslinkable coating composition and method of producing the same
US9796815B2 (en) * 2013-07-31 2017-10-24 Dow Global Technologies Llc Process for preparing polycarbamate and reaction product thereof
US10604626B2 (en) 2013-07-31 2020-03-31 Dow Global Technologies, Llc Process for preparing polycarbamate and reaction product thereof
US9683082B2 (en) 2013-07-31 2017-06-20 Dow Global Technologies Llc Process to produce polycarbamate using a gradient feed of urea
US9006379B2 (en) * 2013-07-31 2015-04-14 Dow Global Technologies Llc Process to produce polycarbamate using a gradient feed of urea
EP3033376B1 (fr) * 2013-08-15 2022-12-28 Dow Global Technologies LLC Polycarbamate
CN105452339B (zh) 2013-08-15 2019-07-09 陶氏环球技术有限责任公司 制造聚氨基甲酸酯的方法、由其制造的聚氨基甲酸酯及包含所述聚氨基甲酸酯的涂料组合物
JP6584405B2 (ja) * 2013-08-15 2019-10-02 ダウ グローバル テクノロジーズ エルエルシー ポリカルバメートを生成するためのプロセス、それによって生成されたポリカルバメート、及びポリカルバメートを含むコーティング組成物
EP2949687B1 (fr) 2014-05-29 2016-10-19 Dow Global Technologies Llc Procédés d'alimentation en eau pour la distribution de commande de poids moléculaire et sous-produits de la carbamylation de l'urée
JP6661305B2 (ja) 2014-09-22 2020-03-11 ダウ グローバル テクノロジーズ エルエルシー 一価金属含有触媒、ポリオールおよび尿素化合物のカルバミル化組成物、ならびにこれを使用したカルバミル化プロセス

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3219686A (en) * 1961-12-29 1965-11-23 Millmaster Onyx Corp Preparation of diol dicarbamates with stannic chloride
US3424724A (en) * 1965-10-24 1969-01-28 Ashland Oil Inc Aldehyde-modified carbamates
US4156784A (en) * 1974-12-18 1979-05-29 Basf Aktiengesellschaft Manufacture of carbamates
DE2459765A1 (de) * 1974-12-18 1976-07-01 Basf Ag Verfahren zur herstellung von carbamaten
DE3021554A1 (de) * 1980-06-07 1981-12-24 Basf Ag, 6700 Ludwigshafen Verfahren zur herstellung von carbonaten
US4443622A (en) * 1981-05-15 1984-04-17 West Point Pepperell, Inc. Method for making carbamates
US4443621A (en) * 1983-03-14 1984-04-17 Pfizer Inc. p-Nitrophenyl 3-bromo-2,2-diethoxy-propionate and synthetic utility therefor
US4459397A (en) * 1983-04-25 1984-07-10 Wisconsin Alumni Research Foundation Modified polyether polyol for preparation of polyurethane polymer
JP3374863B2 (ja) * 1993-08-12 2003-02-10 三菱瓦斯化学株式会社 ジアルキルカーボネートの製造方法
US5709950A (en) * 1994-04-29 1998-01-20 Ppg Industries, Inc. Color-plus-clear composite coatings that contain polymers having carbamate functionality
JPH07330686A (ja) * 1994-06-08 1995-12-19 Mitsubishi Gas Chem Co Inc ジアルキルカーボネートの製造方法
US5902894A (en) * 1998-08-26 1999-05-11 Catalytic Distillation Technologies Process for making dialkyl carbonates

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2005066111A1 *

Also Published As

Publication number Publication date
CN1849290A (zh) 2006-10-18
US20070252106A1 (en) 2007-11-01
DE10341952A1 (de) 2005-05-12
JP2007505053A (ja) 2007-03-08
DE10341952B4 (de) 2008-11-20
CN1849290B (zh) 2011-06-15
WO2005066111A1 (fr) 2005-07-21

Similar Documents

Publication Publication Date Title
EP1404740B1 (fr) Procede de fabrication d'oligocarbonate diols aliphatiques
EP0057360B1 (fr) Dérivés d'acide carbonique cycliques, procédé pour leur préparation et leur utilisation comme constituants de copolymérisation pour la préparation de polycarbonates
DE69513159T2 (de) Verfahren zur herstellung von polycarbonaten mit hydroxylendgruppen
DE60112347T2 (de) Verfahren zur Herstellung von Polycarbonatdiolen mit hohem Molekulargewicht
DE68925667T2 (de) Copolyester-Diol-Polycarbonate, Verfahren zu ihrer Herstellung und deren Verwendung
DE10341952B4 (de) Zwischenprodukt bestehend aus einer Mischung von organischen Carbonaten und Carbamaten und ein Verfahren zu seiner Herstellung
EP1663938B1 (fr) Procede de production de carbonates organiques
WO2011012599A1 (fr) Procédé de fabrication de polyétherols à partir d’oxydes d’alkylène
DE2059051C2 (de) Polymethyläther und deren Verwendung
EP3870619B1 (fr) Procédé de production de copolymères séquencés de polyoxyméthylène polyoxyalkylène
DE68914494T2 (de) Oligomer-Carbonat-Kettenstopper und Verfahren zu ihrer Herstellung und zu ihrer Anwendung.
DE602005002950T2 (de) Verfahren zur herstellung von polyetherpolyolen
DE3103136A1 (de) Neue bicyclische ethercarbonate, verfahren zu ihrer herstellung und ihre verwendung
EP1663939B1 (fr) Procede de production de carbonates organiques
DE2448649C3 (de) Verfahren zur Herstellung von aliphatischen oder cycloaliphatischen Diol-Polycarbonaten
DE2842271A1 (de) Esterdiolalkoxylate
EP1485424B2 (fr) Polyethers et utilisation en tant qu'huiles support
EP0057825B1 (fr) Procédé de préparation de carbonates aliphatiques cycliques
DD148957A1 (de) Verfahren zur herstellung von hochmolekularen polyetheralkoholen
EP0166958B1 (fr) Polyétylène-glycols
EP0131164B1 (fr) Procédé pour la préparation de polyestercarbonates à poids moléculaire élevé
DE3506714A1 (de) Verfahren zur kontinuierlichen homologisierung von methanol
DE102004043990A1 (de) Verfahren zur Herstellung von Kohlensäureestern
DE102004040193B3 (de) Verfahren zur Herstellung von Carbamidsäureestern
DE1299426B (de) Verfahren zur Herstellung eines Polyaethergemisches

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20060411

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR

RIN1 Information on inventor provided before grant (corrected)

Inventor name: WAGNER, ULRICH

Inventor name: WOELK, HANS-JUERGEN

Inventor name: EBERHARDT, JUERGEN

Inventor name: BUCHOLD, HENNING

DAX Request for extension of the european patent (deleted)
RBV Designated contracting states (corrected)

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR

17Q First examination report despatched

Effective date: 20090706

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20150203