WO2002059189A3 - Method for separating polystyrene and polyethylene terephthalate - Google Patents

Method for separating polystyrene and polyethylene terephthalate Download PDF

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Publication number
WO2002059189A3
WO2002059189A3 PCT/US2001/050739 US0150739W WO02059189A3 WO 2002059189 A3 WO2002059189 A3 WO 2002059189A3 US 0150739 W US0150739 W US 0150739W WO 02059189 A3 WO02059189 A3 WO 02059189A3
Authority
WO
WIPO (PCT)
Prior art keywords
polyethylene terephthalate
polystyrene
solution
dissolving
solvent
Prior art date
Application number
PCT/US2001/050739
Other languages
French (fr)
Other versions
WO2002059189A2 (en
Inventor
Nicholas Edward Kob Iii
Original Assignee
Du Pont
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 Du Pont filed Critical Du Pont
Priority to AU2002246886A priority Critical patent/AU2002246886A1/en
Publication of WO2002059189A2 publication Critical patent/WO2002059189A2/en
Publication of WO2002059189A3 publication Critical patent/WO2002059189A3/en

Links

Classifications

    • 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
    • C08J11/08—Recovery or working-up of waste materials of polymers without chemical reactions using selective solvents for polymer components
    • 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
    • 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
    • B29B2017/0203—Separating plastics from plastics
    • 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
    • B29B2017/0293—Dissolving the materials in gases or liquids
    • 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
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/04—Polymers of ethylene
    • B29K2023/06—PE, i.e. polyethylene
    • B29K2023/0608—PE, i.e. polyethylene characterised by its density
    • B29K2023/0633—LDPE, i.e. low density polyethylene
    • 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
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/04—Polymers of ethylene
    • B29K2023/06—PE, i.e. polyethylene
    • B29K2023/0608—PE, i.e. polyethylene characterised by its density
    • B29K2023/065—HDPE, i.e. high density polyethylene
    • 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
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/10—Polymers of propylene
    • B29K2023/12—PP, i.e. polypropylene
    • 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
    • B29K2025/00—Use of polymers of vinyl-aromatic compounds or derivatives thereof as moulding material
    • B29K2025/04—Polymers of styrene
    • B29K2025/06—PS, i.e. polystyrene
    • 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
    • B29K2067/003—PET, i.e. poylethylene terephthalate
    • 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

Landscapes

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

Abstract

An improved method of recovering and recycling polystyrene and polyethylene terephthalate from a mixed plastic waste stream involving dissolving the polystyrene in a dibasic organic acid ester solvent (e.g., a mixture of dimethyl adipate, dimethyl glutarate, and dimethyl succinate) at a temperature range of 0 °C to less than 160 °C without dissolving the polyethylene terephthalate and then after separating and recovering the polystyrene solution, dissolving the polyethylene terephthalate in the same solvent at a temperature range of from 160 °C to 225 °C. The polystyrene can be conveniently isolated from solution by evaporation of solvent while the polyethylene terephthalate can be isolated from solution by cooling and precipitation.
PCT/US2001/050739 2000-11-08 2001-10-22 Method for separating polystyrene and polyethylene terephthalate WO2002059189A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2002246886A AU2002246886A1 (en) 2000-11-08 2001-10-22 Method for separating polystyrene and polyethylene terephthalate

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US70812500A 2000-11-08 2000-11-08
US09/708,125 2000-11-08

Publications (2)

Publication Number Publication Date
WO2002059189A2 WO2002059189A2 (en) 2002-08-01
WO2002059189A3 true WO2002059189A3 (en) 2002-10-03

Family

ID=24844458

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2001/050739 WO2002059189A2 (en) 2000-11-08 2001-10-22 Method for separating polystyrene and polyethylene terephthalate

Country Status (3)

Country Link
AU (1) AU2002246886A1 (en)
TW (1) TW558562B (en)
WO (1) WO2002059189A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004018287B4 (en) 2004-04-15 2006-04-27 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Process for recycling polyesters or polyester mixtures from polyester-containing waste

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2226318A (en) * 1988-12-23 1990-06-27 Ici Plc Non-attritive method for making polyester particles
WO1991003515A1 (en) * 1989-09-11 1991-03-21 Rensselaer Polytechnic Institute Polymer recycling by selective dissolution
JP2000044724A (en) * 1998-05-27 2000-02-15 Stylo Japan:Kk Solvent for plastics and collection of plastics
WO2001036523A1 (en) * 1999-11-18 2001-05-25 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Method for reclaiming polyester or polyester mixtures

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2226318A (en) * 1988-12-23 1990-06-27 Ici Plc Non-attritive method for making polyester particles
WO1991003515A1 (en) * 1989-09-11 1991-03-21 Rensselaer Polytechnic Institute Polymer recycling by selective dissolution
JP2000044724A (en) * 1998-05-27 2000-02-15 Stylo Japan:Kk Solvent for plastics and collection of plastics
WO2001036523A1 (en) * 1999-11-18 2001-05-25 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Method for reclaiming polyester or polyester mixtures

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Week 0019, Derwent World Patents Index; AN 2000-218082, XP002205060 *

Also Published As

Publication number Publication date
WO2002059189A2 (en) 2002-08-01
AU2002246886A1 (en) 2002-08-06
TW558562B (en) 2003-10-21

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