JPS60248646A - ポリエステル屑の解重合方法 - Google Patents

ポリエステル屑の解重合方法

Info

Publication number
JPS60248646A
JPS60248646A JP59104482A JP10448284A JPS60248646A JP S60248646 A JPS60248646 A JP S60248646A JP 59104482 A JP59104482 A JP 59104482A JP 10448284 A JP10448284 A JP 10448284A JP S60248646 A JPS60248646 A JP S60248646A
Authority
JP
Japan
Prior art keywords
depolymerization
polyester
glycol
bht
reaction system
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.)
Granted
Application number
JP59104482A
Other languages
English (en)
Japanese (ja)
Other versions
JPH0331190B2 (cg-RX-API-DMAC7.html
Inventor
Akiharu Fujita
藤田　昭春
Minako Satou
美奈子 佐藤
Masashige Murakami
村上　雅茂
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.)
Toray Industries Inc
Original Assignee
Toray Industries Inc
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 Toray Industries Inc filed Critical Toray Industries Inc
Priority to JP59104482A priority Critical patent/JPS60248646A/ja
Priority to US06/735,837 priority patent/US4609680A/en
Priority to EP19850303572 priority patent/EP0174062A3/en
Priority to KR1019850003586A priority patent/KR850008352A/ko
Priority to CN85106299.7A priority patent/CN1004004B/zh
Publication of JPS60248646A publication Critical patent/JPS60248646A/ja
Publication of JPH0331190B2 publication Critical patent/JPH0331190B2/ja
Granted legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L23/00—Control, warning or like safety means along the route or between vehicles or trains
    • 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
    • C08J11/10—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation
    • C08J11/18—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation by treatment with organic material
    • C08J11/22—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation by treatment with organic material by treatment with organic oxygen-containing compounds
    • C08J11/24—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation by treatment with organic material by treatment with organic oxygen-containing compounds containing hydroxyl groups
    • 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
    • C08J11/10—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation
    • C08J11/18—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation by treatment with organic material
    • 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
    • Y02W30/62—Plastics recycling; Rubber recycling

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Polyesters Or Polycarbonates (AREA)
  • Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
JP59104482A 1984-05-25 1984-05-25 ポリエステル屑の解重合方法 Granted JPS60248646A (ja)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP59104482A JPS60248646A (ja) 1984-05-25 1984-05-25 ポリエステル屑の解重合方法
US06/735,837 US4609680A (en) 1984-05-25 1985-05-20 Process for the depolymerization of polyester scrap
EP19850303572 EP0174062A3 (en) 1984-05-25 1985-05-21 Process for the depolymerization of polyester scrap
KR1019850003586A KR850008352A (ko) 1984-05-25 1985-05-24 폴리에스테르 부스러기(屑)의 해중합(解重合)방법
CN85106299.7A CN1004004B (zh) 1984-05-25 1985-08-21 聚酯碎屑的解聚法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP59104482A JPS60248646A (ja) 1984-05-25 1984-05-25 ポリエステル屑の解重合方法
CN85106299.7A CN1004004B (zh) 1984-05-25 1985-08-21 聚酯碎屑的解聚法

Publications (2)

Publication Number Publication Date
JPS60248646A true JPS60248646A (ja) 1985-12-09
JPH0331190B2 JPH0331190B2 (cg-RX-API-DMAC7.html) 1991-05-02

Family

ID=76224748

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59104482A Granted JPS60248646A (ja) 1984-05-25 1984-05-25 ポリエステル屑の解重合方法

Country Status (5)

Country Link
US (1) US4609680A (cg-RX-API-DMAC7.html)
EP (1) EP0174062A3 (cg-RX-API-DMAC7.html)
JP (1) JPS60248646A (cg-RX-API-DMAC7.html)
KR (1) KR850008352A (cg-RX-API-DMAC7.html)
CN (1) CN1004004B (cg-RX-API-DMAC7.html)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6214893B1 (en) 1997-11-14 2001-04-10 Mitsubishi Heavy Industries, Ltd. Polyester decomposition process and polyester monomerization system
WO2021200754A1 (ja) 2020-03-31 2021-10-07 ユニチカ株式会社 二軸延伸ポリエステル樹脂系フィルム及びその製造方法
CN115443304A (zh) * 2020-04-13 2022-12-06 伊士曼化工公司 化学回收着色塑料混合物
JP2023027592A (ja) * 2021-08-17 2023-03-02 ユニチカ株式会社 再生ポリエステル樹脂及び再生ポリエステル樹脂の製造方法
JP2023028055A (ja) * 2021-08-18 2023-03-03 ユニチカ株式会社 再生ポリエステル繊維

Families Citing this family (72)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5236959A (en) * 1992-03-12 1993-08-17 Hoechst Celanese Corporation Process for recycling polyester/cotton blends
US5223544A (en) * 1992-03-31 1993-06-29 Shell Oil Company Process for the removal of foreign materials from a post-consumer plyethylene terephthalate feed stream
MX9604038A (es) * 1994-03-11 1997-09-30 Monsanto Co Composiciones de poliester recirculado retardadoras de llama.
US5710315A (en) * 1994-05-27 1998-01-20 E. I. Du Pont De Nemours And Company Monomer recovery process for contaminated polymers
US5532404A (en) * 1994-05-27 1996-07-02 E. I. Du Pont De Nemours And Company Monomer recovery process for contaminated polymers
US5559159A (en) * 1995-12-07 1996-09-24 Eastman Chemical Company Process including depolymerization in polyester reactor for recycling polyester materials
US5635584A (en) * 1995-12-07 1997-06-03 Eastman Chemical Company Process including glycolysis and subsequent purification for recycling polyester materials
DE19643479B4 (de) * 1996-10-22 2006-04-20 Zimmer Ag Verfahren zur Herstellung von Polyethylenterephthalat aus Polyethylenterephthalat-Abfall
US6410607B1 (en) 1999-02-10 2002-06-25 Eastman Chemical Company Glycolysis process for recycling of post-consumer pet
FR2825701B1 (fr) * 2001-06-08 2003-09-12 Ct D Etudes Sur Le Recyclage D Procede de synthese de diols par alcoolyse de polyesters en milieu fondu en reacteur discontinu ou continu, application au recyclage des polyesters
KR100430627B1 (ko) * 2001-07-10 2004-05-10 주식회사 코오롱 알칼리 이용성 폴리에스테르의 제조방법
KR100866819B1 (ko) * 2001-10-16 2008-11-04 데이진 가부시키가이샤 Ｐｅｔ 보틀의 리사이클 방법
US20030134915A1 (en) * 2001-12-17 2003-07-17 Scantlebury Geoffrey Raymond Production of transparent polyester using waste
JPWO2003051815A1 (ja) * 2001-12-18 2005-04-28 株式会社アイエス ポリエステルのエチレングリコール分解生成溶液の脱イオン処理方法
CN100503700C (zh) * 2003-02-27 2009-06-24 聚酯回收有限公司 聚对苯二甲酸乙二酯的去污染方法
US7297721B2 (en) * 2003-06-20 2007-11-20 Futura Polyesters Limited Process for controlled polymerization of a mixed polymer
US7812077B2 (en) * 2003-12-17 2010-10-12 Sabic Innovative Plastics Ip B.V. Polyester compositions, method of manufacture, and uses thereof
US8067493B2 (en) * 2003-12-30 2011-11-29 Sabic Innovative Plastics Ip B.V. Polymer compositions, method of manufacture, and articles formed therefrom
US7807745B2 (en) * 2006-01-27 2010-10-05 Sabic Innovative Plastics Ip B.V. Molding compositions containing polycarbonate and modified polybutylene terephthalate (PBT) random copolymers derived from polyethylene terephthalate (PET)
WO2005092963A1 (en) * 2004-03-26 2005-10-06 Do Gyun Kim Recycled method for a wasted polymer which is mixed polyester polyamide and reclaimed materials thereof
US8680167B2 (en) * 2006-01-27 2014-03-25 Sabic Innovative Plastics Ip B.V. Molding compositions containing fillers and modified polybutylene terephthalate (PBT) random copolymers derived from polyethylene terephthalate (PET)
US7923506B2 (en) * 2006-01-27 2011-04-12 Sabic Innovative Plastics Ip B.V. Molding compositions containing modified polybutylene terephthalate (PBT) random copolymers derived from polyethylene terephthalate (PET)
US7902264B2 (en) * 2006-01-27 2011-03-08 Sabic Innovative Plastics Ip B.V. Polytrimethylene terephthalate (PTT) derived from polyethylene terephthalate (PET) and containing PET residues
WO2007089653A2 (en) * 2006-01-27 2007-08-09 General Electric Company Molding compositions containing polyalkylene terephthalates and modified polybutylene terephthalate (pbt) random copolymers derived from pet
US7902263B2 (en) * 2006-01-27 2011-03-08 Sabic Innovative Plastics Ip B.V. Process for making polybutylene terephthalate (PBT) from polyethylene terephthalate (PET)
EP1979403B1 (en) * 2006-01-27 2009-12-30 General Electric Company Articles derived from compositions containing modified polybutylene terephthalate (pbt) random copolymers derived from polyethylene terephthalate (pet)
US7799836B2 (en) * 2006-03-01 2010-09-21 Sabic Innovative Plastics Ip B.V. Process for making polybutylene terephthalate (PBT) from polyethylene terephthalate (PET)
US8309656B2 (en) * 2006-07-26 2012-11-13 Sabic Innovative Plastics Ip B.V. Elastomer blends containing polycarbonates and copolyetheresters derived from polyethylene terephthalate, method of manufacture, and articles therefrom
US7799838B2 (en) * 2006-07-26 2010-09-21 Sabic Innovative Plastics Ip B.V. Elastomer blends of polyesters and copolyetheresters derived from polyethylene terephthalate, method of manufacture, and articles therefrom
US7799892B2 (en) * 2008-05-02 2010-09-21 Sabic Innovative Plastics Ip B.V. Method of making polybutylene terephthalate and compositions and articles comprising the same
US7928150B2 (en) * 2008-05-06 2011-04-19 Sabic Innovative Plastics Ip B.V. Process for the manufacture of lonomeric polybutylene terephthalate from polyethylene terephthalate, and compositions and articles thereof
US20100168317A1 (en) * 2008-12-30 2010-07-01 Cahoon-Brister Kristen Poly(butylene terephthalate) compositions, methods of manufacture, and articles thereof
US20100168328A1 (en) * 2008-12-30 2010-07-01 Ganesh Kannan Process for the manufacture of polycyclohexane dimethylene terephthalate copolymers from polyethylene terephthalate, and compositions and articles thereof
US7910657B2 (en) * 2008-12-30 2011-03-22 Sabic Innovative Plastics Ip B.V. Process for the manufacture of polybutylene terephthalate copolymers from polyethylene terephthalate, and compositions and articles thereof
US20100168321A1 (en) * 2008-12-30 2010-07-01 Cahoon-Brister Kristen Poly(butylene terephthalate) compositions, methods of manufacture, and articles thereof
US8138244B2 (en) * 2008-12-30 2012-03-20 Sabic Innovative Plastics Ip B.V. Reinforced polyester compositions, method of manufacture, and articles thereof
KR101240338B1 (ko) 2010-04-19 2013-03-07 웅진케미칼 주식회사 폐폴리에스테르를 이용한 재생 폴리에스테르 단섬유 및 그 제조방법
US8686072B2 (en) 2010-06-29 2014-04-01 Sabic Innovative Plastics Ip B.V. Flame resistant polyester compositions, method of manufacture, and articles therof
US8716378B2 (en) 2010-06-29 2014-05-06 Sabic Innovative Plastics Ip B.V. Flame resistant polyester compositions, method of manufacture, and articles thereof
US9458354B2 (en) 2010-10-06 2016-10-04 Resinate Technologies, Inc. Polyurethane dispersions and methods of making and using same
CN103703086A (zh) 2011-06-10 2014-04-02 克里斯托弗·M·费利斯 透明涂层，丙烯酸类涂层
US9234074B2 (en) 2012-04-20 2016-01-12 Perpetual Global Technologies Limited Flakes of ester mixtures and methods for their production
CN102731760B (zh) * 2012-07-17 2014-03-26 龙福环能科技股份有限公司 一种将回收聚酯瓶片料熔体醇解后再聚合的方法
US9732026B2 (en) 2012-12-14 2017-08-15 Resinate Technologies, Inc. Reaction products containing hydroxyalkylterephthalates and methods of making and using same
US9255194B2 (en) 2013-10-15 2016-02-09 International Business Machines Corporation Methods and materials for depolymerizing polyesters
CN104710601B (zh) * 2015-01-23 2016-08-24 树业环保科技股份有限公司 废旧pet材料脱色回收制备高纯pet切片的方法及制品
US9815808B2 (en) 2016-02-29 2017-11-14 Regents Of The University Of Minnesota Recovery of monomer from polyurethane materials by depolymerization
US12522695B2 (en) 2019-10-08 2026-01-13 Eastman Chemical Company Catalyst systems for crystallizable reactor grade resins with recycled content
CA3154880A1 (en) 2019-10-25 2021-04-29 Mark Allen Peters Copolyesters produced from recycled copolyesters
IT201900025039A1 (it) 2019-12-20 2021-06-20 Garbo S R L Processo per purificare il bis(2-idrossietil)tereftalato.
CN115397904B (zh) 2020-04-13 2025-12-05 伊士曼化工公司 化学回收塑料干细料
MX2022012764A (es) 2020-04-13 2022-11-07 Eastman Chem Co Reciclaje quimico de materiales que comprenden alfombra automotriz de desecho.
US11814492B2 (en) 2020-12-02 2023-11-14 International Business Machines Corporation Polyester recycling process with pre-reaction purification
JP7784658B2 (ja) * 2021-08-18 2025-12-12 ユニチカ株式会社 再生ポリエステル樹脂及び再生ポリエステル樹脂の製造方法
JP2023028056A (ja) * 2021-08-18 2023-03-03 ユニチカ株式会社 熱接着性芯鞘型複合繊維
JP7784657B2 (ja) * 2021-08-18 2025-12-12 ユニチカ株式会社 再生ポリエステル樹脂及び再生ポリエステル樹脂の製造方法
EP4402202A4 (en) 2021-09-16 2025-07-09 Circ Llc PROCESS FOR FORMING A POLYESTER FROM A REGENERATED DIACID FORMED FROM THE DEPOLYMERIZATION OF A WASTE MATERIAL
DE102021212695A1 (de) 2021-11-11 2023-05-11 Thyssenkrupp Ag Vorrichtung und verfahren zur herstellung eines polyester-depolymerisats sowie vorrichtung und verfahren zur herstellung eines polyesters
EP4276131A1 (en) 2022-05-10 2023-11-15 Polymetrix AG Method for the preparation of a polyester
US20250353985A1 (en) 2022-05-10 2025-11-20 Polymeterix AG Monomer recycling of polyesters
IT202200016851A1 (it) 2022-08-05 2024-02-05 Chempet Srl Processo per purificare bis(2-idrossietil)tereftalato ottenuto da depolimerizzazione di rifiuti contenenti polietilene tereftalato.
EP4342942B1 (en) 2022-09-20 2024-07-10 revalyu Resources GmbH Process for recycling polyethylene terephthalate determined by intrinsic viscosity of polyethylene terephthalate
ES2987897T3 (es) 2022-09-20 2024-11-18 Revalyu Resources Gmbh Proceso para reciclar tereftalato de polietileno utilizando un intervalo de temperatura seleccionado para elprocesamiento de oligómeros
EP4342946B1 (en) 2022-09-20 2024-07-17 revalyu Resources GmbH Process for recycling polyethylene terephthalate using a washing reactor
EP4342945B1 (en) 2022-09-20 2024-07-17 revalyu Resources GmbH Process for recycling polyethylene terephthalate using different mono-ethylene glycol levels
ES2987870T3 (es) 2022-09-20 2024-11-18 Revalyu Resources Gmbh Proceso para reciclar tereftalato de polietileno utilizando un gradiente de concentración de impurezas
ES2987868T3 (es) 2022-09-20 2024-11-18 Revalyu Resources Gmbh Proceso para reciclar tereftalato de polietileno utilizando material filtrante de partículas porosas
EP4342943B1 (en) 2022-09-20 2024-07-17 revalyu Resources GmbH Process for recycling polyethylene terephthalate using a selected feedstock
ES2987865T3 (es) 2022-09-20 2024-11-18 Revalyu Resources Gmbh Proceso para reciclar tereftalato de polietileno utilizando coordenadas de color específicas para el procesamiento de oligómeros
US12401563B2 (en) 2023-01-08 2025-08-26 Keysight Technologies, Inc. Methods, systems, and computer readable media for detecting network service anomalies
SE546629C2 (en) * 2023-06-30 2025-01-02 Rewin Textiles AB Process and system for mixed fabric rejuvination
EP4549486A1 (en) 2023-10-31 2025-05-07 Polymetrix AG Monomer recycling of polyesters

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB610136A (en) * 1946-03-28 1948-10-12 Royden Lewis Heath Degradation of aromatic linear polyesters
BE637964A (cg-RX-API-DMAC7.html) * 1962-09-27
NL301426A (cg-RX-API-DMAC7.html) * 1962-12-06
NL128500C (cg-RX-API-DMAC7.html) * 1963-11-12 1900-01-01
GB1221657A (en) * 1967-06-29 1971-02-03 Agfa Gevaert Nv Preparation of moulding material starting from polyethylene terepthalate
US3884850A (en) * 1970-02-13 1975-05-20 Fiber Industries Inc Continuous atmospheric depolymerization of polyester
JPS5027510B2 (cg-RX-API-DMAC7.html) * 1971-12-03 1975-09-08
US4439549A (en) * 1982-11-22 1984-03-27 Texaco Inc. Novel aromatic polyester polyol mixtures made from polyethylene terephthalate residues and alkylene oxides
US4485196A (en) * 1983-09-26 1984-11-27 Texaco Inc. Liquid phase polyols which are alkylene oxide adducts of terephthalic esters from recycled polyethylene terephthalate

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6214893B1 (en) 1997-11-14 2001-04-10 Mitsubishi Heavy Industries, Ltd. Polyester decomposition process and polyester monomerization system
WO2004087627A1 (ja) * 1997-11-14 2004-10-14 Nobuo Ishihara ポリエステルの分解方法及びポリエステルのモノマー化装置
WO2021200754A1 (ja) 2020-03-31 2021-10-07 ユニチカ株式会社 二軸延伸ポリエステル樹脂系フィルム及びその製造方法
KR20230011919A (ko) 2020-03-31 2023-01-25 유니티카 가부시끼가이샤 이축연신 폴리에스테르 수지계 필름 및 그 제조방법
US12503549B2 (en) 2020-03-31 2025-12-23 Unitika Ltd. Biaxially-stretched polyester resin film and manufacturing method for same
CN115443304A (zh) * 2020-04-13 2022-12-06 伊士曼化工公司 化学回收着色塑料混合物
JP2023027592A (ja) * 2021-08-17 2023-03-02 ユニチカ株式会社 再生ポリエステル樹脂及び再生ポリエステル樹脂の製造方法
JP2023028055A (ja) * 2021-08-18 2023-03-03 ユニチカ株式会社 再生ポリエステル繊維

Also Published As

Publication number Publication date
JPH0331190B2 (cg-RX-API-DMAC7.html) 1991-05-02
EP0174062A2 (en) 1986-03-12
CN85106299A (zh) 1987-02-18
CN1004004B (zh) 1989-04-26
EP0174062A3 (en) 1987-05-27
US4609680A (en) 1986-09-02
KR850008352A (ko) 1985-12-16

Similar Documents

Publication Publication Date Title
JPS60248646A (ja) ポリエステル屑の解重合方法
US3689461A (en) Process for the preparation of linear condensation polyesters
US4020049A (en) Process for preparing polyester resin
US3496220A (en) Esterification process
US5331066A (en) Process for producing polyester ether copolymer
US4124566A (en) Process for preparing polyesters
US5854377A (en) Continuous preparation of thermoplastic polyesters
US6429278B1 (en) Process for manufacture of polyesters based on 1,4-cyclohexanedimethanol and isophthalic acid
JP2002293903A (ja) 環状ポリエステルオリゴマーの製造方法、およびポリエステルの製造方法
US4546169A (en) Process for preparation of polyester polyols utilizing polyalkylene terephthalate
KR20230020406A (ko) 올리고머 폴리에틸렌 테레프탈레이트(pet) 기재를 제조하기 위한 방법
JP2004137292A (ja) 共重合ポリエステル
JP3720858B2 (ja) ２，６−ナフタレンジカルボン酸から高分子量ポリエステル樹脂を製造する方法
JP3385735B2 (ja) ポリエステルの製造方法
JP4306038B2 (ja) ポリブチレンテレフタレートの製造法
JPH07118208A (ja) テレフタル酸のエステル化方法
KR20250100327A (ko) 저온 메탄올리시스 해중합 기술에 의해 제조되는 리사이클 디메틸테레프탈레이트(dmt) 및 리사이클 에틸렌글리콜(eg)을 이용한 리사이클 폴리에스테르의 제조방법
KR102766336B1 (ko) 화학적 재활용 pet의 제조 방법
JPS5827782B2 (ja) エステルカホウホウ
US20230203242A1 (en) A method for manufacturing an oligomeric polyethylene terephthalate (pet) substrate
JP4390968B2 (ja) ポリエステルの製造方法
JPS58160314A (ja) ポリエステルの製造方法
WO2026077546A1 (en) Production of rpet suitable for rpet bottles for the beverage industry by the use of chemical recovered bhet
JP3034682B2 (ja) 結晶性芳香族ポリエステルの製造法
JPS6012362B2 (ja) アリ−レンエステル系重合体の製法

Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees