Title:
ISOMERIZATION METHOD OF CYCLOHEXANE DICARBOXYLIC ACID
Document Type and Number:
WIPO Patent Application WO/2021/112405
Kind Code:
A1
Abstract:
The present invention relates to an isomerization method of a cyclohexane dicarboxylic acid (CHDA) and, more specifically, to a method for preparing a trans-cyclohexane dicarboxylic acid (t-CHDA) from a cis-cyclohexane dicarboxylic acid (c-CHDA) by means of catalytic isomerization. Particularly, an implemented embodiment of the present invention provides a method for preparing, in high efficiency and high yield and at a low cost, a CHDA having a high t-CHDA content from a CHDA mainly comprising c-CHDA, by means of an isomerization catalyst comprising zirconia and having a BET specific surface area of 50 m 2/g or greater.
Inventors:
LEE JONG KWON (KR)
JANG NAMJIN (KR)
KIM EUN JEONG (KR)
LEE SUN UK (KR)
JANG NAMJIN (KR)
KIM EUN JEONG (KR)
LEE SUN UK (KR)
Application Number:
PCT/KR2020/014713
Publication Date:
June 10, 2021
Filing Date:
October 27, 2020
Export Citation:
Assignee:
HANWHA SOLUTIONS CORP (KR)
International Classes:
C07C51/353; A61K31/194; B01J21/06; B01J35/10; C07C51/50; C07C61/09
Domestic Patent References:
| WO1994010124A1 | 1994-05-11 |
Foreign References:
| KR101208050B1 | 2012-12-04 | |||
| JP2000191602A | 2000-07-11 | |||
| KR20190076389A | 2019-07-02 | |||
| US5286903A | 1994-02-15 |
Other References:
See also references of EP 4071132A4
Attorney, Agent or Firm:
YOU ME PATENT AND LAW FIRM (KR)
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