US 11,834,395 B2
Method for preparing hydrogenated bisphenol A
Kee Yoon Roh, Daejeon (KR); Jung Hee Jang, Daejeon (KR); Je Young Park, Daejeon (KR); and Nam Hyun Cho, Daejeon (KR)
Assigned to KOREA KUMHO PETROCHEMICAL CO., LTD., Seoul (KR)
Filed by KOREA KUMHO PETROCHEMICAL CO., LTD., Seoul (KR)
Filed on Sep. 14, 2022, as Appl. No. 17/944,676.
Claims priority of application No. 10-2021-0122926 (KR), filed on Sep. 15, 2021.
Prior Publication US 2023/0084194 A1, Mar. 16, 2023
Int. Cl. C07C 29/20 (2006.01)
CPC C07C 29/20 (2013.01) [C07C 2601/14 (2017.05)] 6 Claims
 
1. A method for preparing hydrogenated bisphenol A, comprising:
(a) heating a reactor in which bisphenol A, a solvent, and a ruthenium supported catalyst are added;
(b) supplying hydrogen into the reactor to react; and
(c) blocking the supply of hydrogen to react,
wherein the reaction temperature in each of steps (b) and (c) is 140 to 160° C.,
the reaction time in step (c) is 60 to 90 minutes, and
a ratio of trans/trans isomer of hydrogenated bisphenol A in a product of step (c) is 51.58% or more.