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:
Sep. 29, 2020
Filed:
Feb. 11, 2020
China Petrochemical Development Corporation, Kaohsiung, TW;
Ding-Chi Huang, Kaohsiung, TW;
Yu-Sen Chen, Kaohsiung, TW;
Chih-Wei Chang, Kaohsiung, TW;
Wei-Ying Li, Kaohsiung, TW;
CHINA PETROCHEMICAL DEVELOPMENT CORPORATION, Kaohsiung, TW;
Abstract
A method for producing 9,9-bis(3-phenyl-4-(2-hydroxyethoxy)phenyl)fluorene is provided. The method includes the steps of: performing a condensation reaction with fluorenone and 2-[(2-phenyl)phenoxy]ethanol in the presence of a catalyst and co-catalyst, wherein the catalyst is alkylsulfonic acid, and the co-catalyst is a mercapto-containing compound, thereby effectively reducing the formation of a by-product, such that the product has characteristics of low chroma, high purity, and high yield.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile