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:
Oct. 19, 1999
Filed:
Oct. 17, 1997
Swaminathan Sivaram, Pune, IN;
Vishnu R Ranade, Pune, IN;
Srinivasan Chakrapani, Pune, IN;
Prakash P Wadgonkar, Pune, IN;
Paul D Sybert, Evansville, IN (US);
Gaylord M Kissinger, Evansville, IN (US);
Ashok K Mendiratta, Westlake, OH (US);
General Electric Company, Pittsfield, MA (US);
Abstract
An improved method for the preparation of tris(4-hydroxyphenyl) compounds is provided. In particular, an improved method for preparing 1, 1, 1-tris(4'-hydroxyphenyl)ethane is provided which comprises heating a mixture comprising phenol and 4-hydroxy acetophenone in the presence of effective amounts of an ion exchange catalyst and a mercaptan as a copromoter such that the resulting 1, 1, 1-tris(4'-hydroxyphenyl)ethane is substantially free of various reaction impurities.