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:
Jan. 06, 2004
Filed:
Mar. 06, 2003
Applicant:
Inventors:
Kazuhiko Yao, Wakayama, JP;
Kenji Ekawa, Wakayama, JP;
Yoichiro Isota, Wakayama, JP;
Toru Nakaguchi, Wakayama, JP;
Assignee:
Honshu Chemical Industry Co. Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 3/917 ;
U.S. Cl.
CPC ...
C07C 3/917 ;
Abstract
A process for production of 1,1-bis(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane which comprises reacting phenol with 3,3,5-trimethylcyclohexanone in the presence of an acid catalyst wherein the reaction of phenol with 3,3,5-trimethylcyclohexanone is started in a slurry comprising phenol adduct crystals of 1,1-bis(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane and hydrated phenol in the presence of an acid catalyst, and then the reaction is continued in the slurry.