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. 16, 1997
Filed:
Oct. 15, 1996
Applicant:
Inventors:
Assignee:
Bayer AG, Leverkusen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
521 32 ; 521 33 ; 568196 ; 568718 ; 568721 ; 568722 ; 568723 ; 568727 ; 568728 ;
Abstract
The invention relates to the synthesis of bisphenols from monophenols and carbonyl compounds such as aldehydes and ketones with concentrated mineral acids such as hydrochloric acid and/or hydrogen chloride gas as acid catalysts and a mercaptan as cocatalyst, which is fixed by an ion-pair bond to a matrix insoluble in the reaction medium.