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1. WO2022003990 - METHOD FOR PRODUCING HIGH-PURITY BIS(2-HYDROXYETHYL) TEREPHTHALATE, REGENERATED POLY(ETHYLENE TEREPHTHALATE), DECOLORING SOLVENT, AND METHOD FOR PURIFYING BIS(2-HYDROXYETHYL) TEREPHTHALATE

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Publication Number WO/2022/003990
Publication Date 06.01.2022
International Application No. PCT/JP2020/029418
International Filing Date 31.07.2020
IPC
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
C07C 67/54 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
54by distillation
C07C 69/82 2006.1
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
CACYCLIC OR CARBOCYCLIC COMPOUNDS
69Esters of carboxylic acids; Esters of carbonic or haloformic acids
76Esters of carboxylic acids having an esterified carboxyl group bound to a carbon atom of a six-membered aromatic ring
80Phthalic acid esters
82Terephthalic acid esters
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]
  • 株式会社ＪＥＰＬＡＮ JEPLAN, INC. [JP]/[JP]
Inventors
  • ▲高▼尾　正樹 TAKAO Masaki
  • 堺　通 SAKAI Toru
  • 藤田　博 FUJITA Hiroshi
  • 稲田　修司 INADA Shuji
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 HIGH-PURITY BIS(2-HYDROXYETHYL) TEREPHTHALATE, REGENERATED POLY(ETHYLENE TEREPHTHALATE), DECOLORING SOLVENT, AND METHOD FOR PURIFYING BIS(2-HYDROXYETHYL) TEREPHTHALATE
(FR) PROCÉDÉ DE PRODUCTION DE TÉRÉPHTALATE DE BIS(2-HYDROXYÉTHYLE) DE HAUTE PURETÉ, POLY(TÉRÉPHTALATE D'ÉTHYLÈNE) RÉGÉNÉRÉ, SOLVANT DE DÉCOLORATION ET PROCÉDÉ DE PURIFICATION DE TÉRÉPHTALATE DE BIS(2-HYDROXYÉTHYLE)
(JA) 高純度ビス－（２－ヒドロキシエチル）テレフタレートの製造方法、再生ポリエチレンテレフタレート、脱色溶媒およびビス－（２－ヒドロキシエチル）テレフタレートの精製方法
front page image
Abstract
(EN) [Problem] To provide a method for producing high-purity bis(2-hydroxyethyl) terephthalate (BHET), by which high-purity BHET can be easily produced from colored polyester waste. [Solution] A method for producing high-purity BHET according to the present invention comprises: a depolymerization step in which colored polyester waste is depolymerized to obtain a depolymerization product including colored crude BHET; a concentration step in which low-boiling ingredients contained in the depolymerization product are removed to concentrate the BHET; a recovery step in which the BHET is recovered from the crude BHET to obtain medium-purity BHET; a crystallization separation step in which the medium-purity BHET is subjected to crystallization in a decoloring solvent and the crystals are separated, by solid-liquid separation, from the colorant-containing solvent ingredient, thereby obtaining purified BHET; and a solvent removal step in which the solvent remaining in the crystals of the purified BHET is removed to obtain high-purity BHET.
(FR) Le problème décrit par la présente invention concerne un procédé de production de téréphtalate de bis(2-hydroxyéthyle) (BHET) de haute pureté, permettant de produire facilement un BHET de haute pureté à partir de déchets colorés de polyester. La solution de la présente invention porte sur un procédé de production de BHET de haute pureté comprenant : une étape de dépolymérisation, dans laquelle des déchets colorés de polyester sont dépolymérisés pour obtenir un produit de dépolymérisation comprenant du BHET brut coloré ; une étape de concentration, dans laquelle des ingrédients à bas point d'ébullition contenus dans le produit de dépolymérisation sont éliminés pour concentrer le BHET ; une étape de récupération, dans laquelle le BHET est récupéré à partir du BHET brut pour obtenir un BHET de pureté moyenne ; une étape de séparation par cristallisation, dans laquelle le BHET de pureté moyenne est soumis à une cristallisation dans un solvant de décoloration et les cristaux sont séparés, par séparation solide-liquide, de l'ingrédient de solvant contenant un colorant, ce qui permet d'obtenir du BHET purifié ; et une étape d'élimination de solvant, dans laquelle le solvant restant dans les cristaux du BHET purifié est éliminé pour obtenir un BHET de haute pureté.
(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高純度ＢＨＥＴの製造方法を提供すること。 【解決手段】本発明の高純度ＢＨＥＴの製造方法は、着色された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、解重合物中に含まれる低沸点成分を除去してＢＨＥＴを濃縮する濃縮工程と、粗製ＢＨＥＴからＢＨＥＴを回収して中純度ＢＨＥＴを得る回収工程と、中純度ＢＨＥＴを脱色溶媒中で晶析するとともに、結晶と色素を含有する溶媒成分とを固液分離して精製ＢＨＥＴを得る晶析分離工程と、精製ＢＨＥＴの結晶中に残留する溶媒を除去して高純度ＢＨＥＴを得る脱溶媒工程とを有する。
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