The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 18, 2023
Filed:
Dec. 16, 2019
Applicant:
Hanwha Solutions Corporation, Seoul, KR;
Inventors:
Namjin Jang, Daejeon, KR;
Eun Jeong Kim, Daejeon, KR;
Sun Uk Lee, Daejeon, KR;
Jong Kwon Lee, Daejeon, KR;
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 51/36 (2006.01); C07C 51/353 (2006.01); C07C 29/149 (2006.01); C07C 29/158 (2006.01); C07C 29/56 (2006.01); B01J 21/06 (2006.01); B01J 23/44 (2006.01); B01J 23/62 (2006.01);
U.S. Cl.
CPC ...
C07C 29/158 (2013.01); C07C 29/149 (2013.01); C07C 29/56 (2013.01); C07C 51/353 (2013.01); C07C 51/36 (2013.01); B01J 21/066 (2013.01); B01J 23/44 (2013.01); B01J 23/626 (2013.01);
Abstract
The present disclosure relates to a method for preparation of 1,4-cyclohexanedimethanol. According to the present disclosure, two step reduction reactions are conducted using terephthalic acid as starting material, and an isomerization process for increasing the rate of trans isomers of CHDA is introduced therebetween, thereby providing a method capable of stably preparing CHDM with high rate of trans isomers.