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EP1352023A1 - Procede permettant de traiter une matiere polymere de polycondensation contaminee - Google Patents

Procede permettant de traiter une matiere polymere de polycondensation contaminee

Info

Publication number
EP1352023A1
EP1352023A1 EP02732087A EP02732087A EP1352023A1 EP 1352023 A1 EP1352023 A1 EP 1352023A1 EP 02732087 A EP02732087 A EP 02732087A EP 02732087 A EP02732087 A EP 02732087A EP 1352023 A1 EP1352023 A1 EP 1352023A1
Authority
EP
European Patent Office
Prior art keywords
polycondensate
intrinsic viscosity
increased
surface layer
polycondensate material
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Withdrawn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
EP02732087A
Other languages
German (de)
English (en)
Inventor
Kurt Müntener
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.)
Richard Frisse GmbH
Original Assignee
Richard Frisse 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 Richard Frisse GmbH filed Critical Richard Frisse GmbH
Publication of EP1352023A1 publication Critical patent/EP1352023A1/fr
Withdrawn legal-status Critical Current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
    • B29B17/04—Disintegrating plastics, e.g. by milling
    • 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
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J11/00—Recovery or working-up of waste materials
    • C08J11/04—Recovery or working-up of waste materials of polymers
    • C08J11/06—Recovery or working-up of waste materials of polymers without chemical reactions
    • 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
    • B29B2017/0213—Specific separating techniques
    • B29B2017/0217—Mechanical separating techniques; devices therefor
    • B29B2017/0224—Screens, sieves
    • 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
    • B29B17/04—Disintegrating plastics, e.g. by milling
    • B29B2017/0424—Specific disintegrating techniques; devices therefor
    • B29B2017/046—Extruder as pressing tool with calibrated die openings for forming and disintegrating pasty or melted 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
    • B29K2067/00—Use of polyesters or derivatives thereof, 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
    • B29K2105/065—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts containing impurities
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • B29L2031/7158—Bottles
    • 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
    • C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
    • C08G63/78—Preparation processes
    • 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
    • C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
    • C08G63/78—Preparation processes
    • C08G63/80—Solid-state polycondensation
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
    • C08J2367/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
    • 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
    • Y02W30/52—Mechanical processing of waste for the recovery of materials, e.g. crushing, shredding, separation or disassembly
    • 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 relates to a method for processing contaminated polycondensate material, e.g. Polyethylene terephthalate, e.g. is used for disposable or reusable bottles.
  • contaminated polycondensate material e.g. Polyethylene terephthalate
  • the invention relates to a method for processing contaminated polycondensate material, e.g. Polyethylene terephthalate, e.g. is used for disposable or reusable bottles.
  • Such a consumer product can e.g. consist of polycondensate, in particular of polyethylene terephthalate (PET), as e.g. is used for bottles. If solid particles get between any hard surface and a relatively soft surface of a PET bottle, they can penetrate into the surface of the relatively soft bottle wall or the bottle bottom due to the friction that occurs between the surfaces. These solid particles are then firmly enclosed in the surface of the bottle wall.
  • PET polyethylene terephthalate
  • a conventional washing method in which a washing liquid containing at least one detergent and kept in motion is not able to remove these enclosed particles from the surface of the PET bottles, which may have been reduced to snippets.
  • Numerous mechanical reprocessing processes aim to use used polycondensate material, such as PET bottles.
  • these methods include surface cleaning, melting, and forming steps to obtain a new product.
  • the particles cause material defects. It is known to remove the larger particles by melt filtration as part of the mechanical reprocessing process.
  • filter sizes are used that remove particles with a size of 60 micrometers or more.
  • Some particularly fine filters can remove particles 30 microns or larger.
  • the extremely small particles pass through these filters, and if they do not cause mechanical defects, they cause them also do not cause mechanical defects, they nevertheless cause optical defects which may not be acceptable for some bottle applications.
  • Melt filtration is therefore unsuitable for removing the extremely fine particles, in particular the solid particles.
  • the invention is therefore based on the object of providing a method in which even the extremely fine particles are removed from the polycondensate material to be processed, which particles cannot be removed economically by conventional melt filtration and while maintaining the quality of the polycondensate material.
  • the fine particles that are mainly trapped directly on and below the surface are removed from the material so that they no longer have to be removed by extremely fine filters.
  • the thickness of the removed surface layer of the polycondensate material corresponds to the maximum size of the enclosed particles to be removed. This can be explained by the fact that a solid particle is only exposed to an external frictional force by which it is pressed into the bottle wall until it has completely penetrated the wall. Since larger particles are removed by melt filtration, the surface removal only affects the enclosed solid particles, the size of which is smaller than the smallest filter opening.
  • the thickness of the surface layer removed before melting is approximately 15 to 30 micrometers. This corresponds to the smallest possible filter openings with which melt filtration in connection with the surface removal can be carried out without having to accept the inefficiency of the process and the impairment of the quality of the polycondensate material.
  • the number of visible defects could be reduced to less than 1 per 1000 m 2 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Sustainable Development (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

L'invention concerne un procédé permettant de traiter une matière polymère de polycondensation contaminée, notamment un polyéthylène-téréphthalate (PET). Ce procédé est caractérisé en ce que l'on retire une couche superficielle de la matière de polycondensation à traiter avant que la matière ne soit fondue et filtrée dans la masse fondue. Eventuellement, on ajoute à ce procédé une étape ultérieure, à savoir l'augmentation de la viscosité intrinsèque par une polycondensation en phase fondue ou en phase solide.
EP02732087A 2001-01-17 2002-01-17 Procede permettant de traiter une matiere polymere de polycondensation contaminee Withdrawn EP1352023A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE2001102062 DE10102062A1 (de) 2001-01-17 2001-01-17 Verfahren zum Aufbereiten von verunreinigtem Polykondensat-Material
DE10102062 2001-01-17
PCT/CH2002/000028 WO2002057347A1 (fr) 2001-01-17 2002-01-17 Procede permettant de traiter une matiere polymere de polycondensation contaminee

Publications (1)

Publication Number Publication Date
EP1352023A1 true EP1352023A1 (fr) 2003-10-15

Family

ID=7670929

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02732087A Withdrawn EP1352023A1 (fr) 2001-01-17 2002-01-17 Procede permettant de traiter une matiere polymere de polycondensation contaminee

Country Status (5)

Country Link
EP (1) EP1352023A1 (fr)
JP (1) JP2004524186A (fr)
DE (1) DE10102062A1 (fr)
MX (1) MXPA03006379A (fr)
WO (1) WO2002057347A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006040430B4 (de) 2006-08-29 2022-06-15 Evonik Operations Gmbh Verfahren zur Spaltung von MTBE
DE102011005608A1 (de) 2011-03-16 2012-09-20 Evonik Oxeno Gmbh Mischoxidzusammensetzungen und Verfahren zur Herstellung von Isoolefinen

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4034459A1 (de) * 1990-10-30 1992-05-07 Hoechst Ag Verfahren zur aufbereitung thermisch beanspruchter polyester-abfaelle
US5958987A (en) * 1996-04-10 1999-09-28 The Coca-Cola Company Process for separating polyester from other materials
DE19710098A1 (de) * 1997-03-12 1998-09-17 Paul Stehning Gmbh Verfahren zur Erzeugung von PET-Recyclat aus Flakes, sowie nach dem Verfahren erzeugtes PET-Produkt
DE19953659A1 (de) * 1999-11-08 2001-05-10 Buehler Ag Verfahren und Vorrichtung zur Dekontamination von Polykondensaten

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO02057347A1 *

Also Published As

Publication number Publication date
MXPA03006379A (es) 2004-12-02
DE10102062A1 (de) 2002-07-18
JP2004524186A (ja) 2004-08-12
WO2002057347A1 (fr) 2002-07-25

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Effective date: 20140318