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:
Dec. 01, 2020
Filed:
Oct. 31, 2016
Ptt Global Chemical Public Company Limited, Bangkok, TH;
Sitthiphong Pengpanich, Chatuchak Bangkok, TH;
Papapida Pornsuriyasak, Chatuchak Bangkok, TH;
Suchada Tang-Amornsuksan, Chatuchak Bangkok, TH;
PTT GLOBAL CHEMICAL PUBLIC COMPANY Limited, Bangkok, TH;
Abstract
This invention relates to an ion exchange resin for producing bisphenol with high percent conversion and high percent selectivity to bisphenol, especially 4,4' isopropyhdenediphenol, wherein said ion exchange resin comprising aromatic polymer having sulfonic acid group modified with at least one promoter selected from compounds shown in the structure (I), (II), (III), (IV) or its amine salt: wherein R represents hydrocarbon unit with 1 to 6 carbon atoms selected from alkyl group, alkenyl group, alkynyl group, phenyl group, or optionally hydrocarbon containing carbonyl group having 1 to 6 carbon atoms; X represents heteroatom; n is an integer number from 1 to 4.