Title:
METHOD FOR PREPARING ETHYLENE-VINYL ALCOHOL COPOLYMER
Document Type and Number:
WIPO Patent Application WO/2023/121379
Kind Code:
A1
Abstract:
The present invention relates to a method for preparing an ethylene-vinyl alcohol copolymer, which performs a supercritical extraction process after an ethylene-vinyl acetate copolymer is saponified in the presence of an alkali catalyst, thereby minimizing waste liquid generation without complex apparatuses and equipment, such as a multi-stage distillation column or a pipe mixer and a water tank, and effectively removing by-products such as catalyst residues, and thus can efficiently obtain an ethylene-vinyl alcohol copolymer.
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Inventors:
KIM BONGJUNE (KR)
BAEK SE WON (KR)
BAE HYOJIN (KR)
SONG SUNGJIN (KR)
BAEK SE WON (KR)
BAE HYOJIN (KR)
SONG SUNGJIN (KR)
Application Number:
PCT/KR2022/021154
Publication Date:
June 29, 2023
Filing Date:
December 23, 2022
Export Citation:
Assignee:
LG CHEMICAL LTD (KR)
International Classes:
C08F210/02; C08F6/26; C08F8/12; C08F218/06
Foreign References:
| US20060258803A1 | 2006-11-16 | |||
| KR100236896B1 | 2000-01-15 | |||
| KR20030068867A | 2003-08-25 | |||
| US20200087479A1 | 2020-03-19 |
Other References:
JINHYUN KIM ET AL.: "Removal of residual solvent of Paclitaxel using supercritical carbon dioxide", KOREAN JOURNAL BIOTECHNOLOGY BIOENGINEERING, vol. 16, no. 13, 1 January 2001 (2001-01-01), KR , pages 233 - 236, XP009547362, ISSN: 1225-7117
Attorney, Agent or Firm:
YOU ME PATENT AND LAW FIRM (KR)
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