Title:
METHOD FOR PURIFYING WASTE N-METHYL-2-PYRROLIDONE MIXTURE SOLUTION
Document Type and Number:
WIPO Patent Application WO/2021/006598
Kind Code:
A1
Abstract:
The present invention relates to a method for purifying a waste N-methyl-2-pyrrolidone (hereinafter referred to as NMP) mixture solution and, more specifically, to a method for purifying a waster NMP mixture solution by using a base. According to the present invention, by applying the base to the waste NMP mixture solution, NMS and GBL can be simultaneously removed to collect high-purity NMP.
Inventors:
SHIM SUNG WON (KR)
Application Number:
PCT/KR2020/008854
Publication Date:
January 14, 2021
Filing Date:
July 07, 2020
Export Citation:
Assignee:
JAEWON IND CO LTD (KR)
EM TECH CO LTD (KR)
EM TECH CO LTD (KR)
International Classes:
C07D207/267
Foreign References:
| KR950017953A | 1995-07-22 | |||
| KR20130064021A | 2013-06-17 | |||
| KR20150085065A | 2015-07-22 | |||
| KR20180069284A | 2018-06-25 | |||
| US20130150591A1 | 2013-06-13 | |||
| KR20150085065A | 2015-07-22 | |||
| KR20180069284A | 2018-06-25 | |||
| US2964535A | 1960-12-13 | |||
| KR20150069284A | 2015-06-23 |
Other References:
See also references of EP 3932905A4
Attorney, Agent or Firm:
KIM, Jeongeun (KR)
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