Title:
METHOD FOR PRODUCING BIS-2-HYDROXYETHYL TEREPHTHALATE THROUGH CONTINUOUS DEPOLYMERIZATION
Document Type and Number:
WIPO Patent Application WO/2024/014723
Kind Code:
A1
Abstract:
The present invention relates to a method for producing bis-2-hydroxyethyl terephthalate, the method comprising the steps of: (1) adding a waste polyester raw material into a co-extruder to obtain a co-extrudate; (2) adding the co-extrudate into a reactor with an agitation shaft and depolymerizing same to obtain a first reaction product; (3) adding the first reaction product into a first continuous stirred tank reactor and depolymerizing same to obtain a second reaction product; and (4) adding the second reaction product into a second continuous stirred tank reactor and depolymerizing same to obtain a third reaction product.
Inventors:
KIM JI-HUN (KR)
PARK KWANG-WOO (KR)
LEE SEONG-KI (KR)
LEE JOONG KI (KR)
JIN YUNTAE (KR)
PARK KWANG-WOO (KR)
LEE SEONG-KI (KR)
LEE JOONG KI (KR)
JIN YUNTAE (KR)
Application Number:
PCT/KR2023/008268
Publication Date:
January 18, 2024
Filing Date:
June 15, 2023
Export Citation:
Assignee:
SK CHEMICALS CO LTD (KR)
International Classes:
C07C67/48; C07C69/82; C08J11/24
Domestic Patent References:
| WO2020149798A1 | 2020-07-23 |
Foreign References:
| JP2003055300A | 2003-02-26 | |||
| JP2002332379A | 2002-11-22 | |||
| KR20190026737A | 2019-03-13 | |||
| KR20210067554A | 2021-06-08 | |||
| KR102504202B1 | 2023-02-27 | |||
| KR20220068991A | 2022-05-26 |
Attorney, Agent or Firm:
FIRSTLAW P.C. (KR)
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