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:
Jul. 21, 2020
Filed:
Sep. 27, 2017
Lotte Chemical Corporation, Seoul, KR;
Sung Min Kim, Daejeon, KR;
Mi Sun Cha, Daejeon, KR;
Seong Hwan Choi, Daejeon, KR;
Young Heon Choi, Daejeon, KR;
Sung Joon Park, Daejeon, KR;
Chan Yeong Yun, Daejeon, KR;
Young Jong Seo, Daejeon, KR;
LOTTE CHEMICAL CORPORATION, Seoul, KR;
Abstract
The present invention relates to a method for preparing 1,3-cyclohexanedicarboxylic acid capable of exhibiting excellent activity, of enhancing the reaction efficiency and economic efficiency by using a catalyst having improved durability under the reaction conditions of high temperature and strong acid, of achieving excellent conversion rates by allowing most of reactants to participate in the reaction, and of obtaining products having high purity while minimizing by-products within a shorter period of time. The method for preparing 1,3-cyclohexanedicarboxylic acid may include: reducing isophthalic acid in the presence of a metal catalyst fixed to a silica support and containing a palladium (Pd) compound and a copper (Cu) compound in a weight ratio of 1:0.1 to 0.5.