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. 07, 2020
Filed:
May. 29, 2018
Hydrogenation method for preparing hydrogenated bisphenol-a having a higher trans/trans isomer ratio
Nan Ya Plastics Corporation, Taipei, TW;
Te-Chao Liao, Taipei, TW;
Jung-Jen Chuang, Taipei, TW;
Chung-Yu Chen, Taipei, TW;
Chia-Ruey Tsai, Taipei, TW;
Sung-Chieh Chao, Taipei, TW;
NAN YA PLASTICS CORPORATION, Taipei, TW;
Abstract
A hydrogenation method for preparing HBPA includes placing a BPA reaction liquid into a hydrogenation vessel with a hollow-shaft stirrer installed inside; starting the hollow-shaft stirrer to stir the BPA reaction liquid and simultaneously allowing hydrogen gas evenly distributed over and contact well with the BPA reaction liquid; in the presence of a single-metallic Ru/Al2O3 hydrogenation catalyst to proceed with a catalytic hydrogenation at low temperature and low pressure to produce HBPA, the HBPA has a yield of 99.7% or more, and particularly having a trans/trans isomer ratio above 63%.