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1. WO2022004359 - METHOD FOR PRODUCING BIS-(2-HYDROXYETHYL)TEREPHTHALATE AND METHOD FOR PRODUCING RECYCLED POLYETHYLENE TEREPHTHALATE

Publication Number WO/2022/004359
Publication Date 06.01.2022
International Application No. PCT/JP2021/022690
International Filing Date 15.06.2021
IPC
C08J 11/00 2006.1
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H142
11Recovery or working-up of waste materials
C08J 11/08 2006.1
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H142
11Recovery or working-up of waste materials
04of polymers
06without chemical reactions
08using selective solvents for polymer components
C08J 11/10 2006.1
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H142
11Recovery or working-up of waste materials
04of polymers
10by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation
C08J 11/16 2006.1
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H142
11Recovery or working-up of waste materials
04of polymers
10by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation
16by treatment with inorganic material
C07C 67/52 2006.1
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
CACYCLIC OR CARBOCYCLIC COMPOUNDS
67Preparation of carboxylic acid esters
48Separation; Purification; Stabilisation; Use of additives
52by change in the physical state, e.g. crystallisation
C08G 63/183 2006.1
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
63Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
02Polyesters derived from hydroxy carboxylic acids or from polycarboxylic acids and polyhydroxy compounds
12derived from polycarboxylic acids and polyhydroxy compounds
16Dicarboxylic acids and dihydroxy compounds
18the acids or hydroxy compounds containing carbocyclic rings
181Acids containing aromatic rings
183Terephthalic acids
CPC
C07C 67/52
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
CACYCLIC OR CARBOCYCLIC COMPOUNDS
67Preparation of carboxylic acid esters
48Separation; Purification; Stabilisation; Use of additives
52by change in the physical state, e.g. crystallisation
C07C 67/54
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
CACYCLIC OR CARBOCYCLIC COMPOUNDS
67Preparation of carboxylic acid esters
48Separation; Purification; Stabilisation; Use of additives
52by change in the physical state, e.g. crystallisation
54by distillation
C07C 69/82
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
CACYCLIC OR CARBOCYCLIC COMPOUNDS
69Esters of carboxylic acids; Esters of carbonic or haloformic acids
76Esters of carboxylic acids having a carboxyl group bound to a carbon atom of a six-membered aromatic ring
80Phthalic acid esters
82Terephthalic acid esters
C08G 63/183
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
63Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
02Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds
12derived from polycarboxylic acids and polyhydroxy compounds
16Dicarboxylic acids and dihydroxy compounds
18the acids or hydroxy compounds containing carbocyclic rings
181Acids containing aromatic rings
183Terephthalic acids
C08J 11/00
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G
11Recovery or working-up of waste materials
C08J 11/08
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G
11Recovery or working-up of waste materials
04of polymers
06without chemical reactions
08using selective solvents for polymer components
Applicants
  • 株式会社シンテック SHINTECH CORPORATION [JP]/[JP]
  • 日本環境設計株式会社 JEPLAN, INC. [JP]/[JP]
Inventors
  • ▲高▼尾 正樹 TAKAO Masaki
  • 堺 通 SAKAI Toru
  • 山原 慧 YAMAHARA Kei
  • 稲田 修司 INADA Shuji
  • 藤田 博 FUJITA Hiroshi
Agents
  • 特許業務法人IPX IPX PATENT PARTNERS
Priority Data
2020-11171929.06.2020JP
Publication Language Japanese (ja)
Filing Language Japanese (JA)
Designated States
Title
(EN) METHOD FOR PRODUCING BIS-(2-HYDROXYETHYL)TEREPHTHALATE AND METHOD FOR PRODUCING RECYCLED POLYETHYLENE TEREPHTHALATE
(FR) PROCÉDÉ DE PRODUCTION DE BIS-(2-HYDROXYETHYL)TÉRÉPHTALATE ET PROCÉDÉ DE PRODUCTION DE POLYÉTHYLÈNE TÉRÉPHTHALATE RECYCLÉ
(JA) ビス-(2-ヒドロキシエチル)テレフタレートの製造方法および再生ポリエチレンテレフタレートの製造方法
Abstract
(EN) [Problem] To provide a method for producing bis-(2-hydroxyethyl)terephthalate (BHET), the method being capable of simply producing a BHET with high purity from a colored polyester waste. [Solution] A method for producing a BHET according to the present invention comprises: a depolymerization step for mixing a polyester waste colored by a pigment, with a monoethylene glycol and a depolymerization catalyst, and depolymerizing the polyester waste to obtain a depolymerized product containing a crude colored BHET; a pigment decomposition/removal step for adding a pigment decomposition agent to the depolymerized product and cooling and centrifuging the resultant mixture, thereby separating extracted solids and the decomposed product of the pigment and removing at least a portion of the decomposed product from the depolymerized product; a concentration step for removing a low boiling-point component containing monoethylene glycol from the depolymerized product from which at least a portion of the decomposed product has been removed, and concentrating the crude BHET; and a collection step for collecting, by distillation, BHET from the concentrated crude BHET to obtain a BHET having higher purity than the crude BHET.
(FR) Le problème à résoudre par la présente invention est de fournir un procédé de production de bis-(2-hydroxyéthyl)téréphtalate (BHET), le procédé étant capable de produire simplement un BHET avec une pureté élevée à partir de déchets de polyester coloré. La solution selon la présente invention porte sur un procédé de production d'un BHET comprenant : une étape de dépolymérisation pour mélanger un déchet de polyester coloré par un pigment, avec un monoéthylène glycol et un catalyseur de dépolymérisation, et dépolymériser les déchets de polyester pour obtenir un produit dépolymérisé contenant un BHET coloré brut; une étape de décomposition/élimination de pigment pour ajouter un agent de décomposition de pigment au produit dépolymérisé et refroidir et centrifuger le mélange résultant, ce qui permet de séparer les solides extraits et le produit décomposé du pigment et d'éliminer au moins une partie du produit décomposé du produit dépolymérisé; une étape de concentration pour éliminer un composant à bas point d'ébullition contenant du monoéthylène glycol à partir du produit dépolymérisé à partir duquel au moins une partie du produit décomposé a été éliminée, et concentrer le BHET brut; et une étape de collecte pour collecter, par distillation, BHET à partir du BHET brut concentré pour obtenir un BHET ayant une pureté supérieure à celle du BHET brut.
(JA) 【課題】着色されたポリエステル廃棄物から高純度のビス-(2-ヒドロキシエチル)テレフタレート(BHET)を簡便に製造し得るBHETの製造方法を提供すること。 【解決手段】本発明のBHETの製造方法は、色素により着色されたポリエステル廃棄物と、モノエチレングリコールおよび解重合触媒とを混合し、ポリエステル廃棄物を解重合して、着色した粗製BHETを含む解重合物を得る解重合工程と、解重合物に色素分解剤を添加するとともに冷却し、遠心分離することにより、析出した固形分と色素の分解物とを分離し、解重合物から分解物の少なくとも一部を除去する色素分解除去工程と、分解物の少なくとも一部が除去された解重合物から、モノエチレングリコールを含有する低沸点成分を除去して、粗製BHETを濃縮する濃縮工程と、濃縮された粗製BHETから、BHETを蒸留により回収して、粗製BHETより純度の高いBHETを得る回収工程とを有する。
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