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:
Apr. 13, 1982
Filed:
Jun. 30, 1980
Applicant:
Inventors:
Assignee:
Bayer Aktiengesellschaft, Leverkusen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ; C07C / ; C07C / ; C07C / ;
U.S. Cl.
CPC ...
568719 ; 568712 ; 568717 ; 568721 ; 568731 ; 568735 ; 568737 ; 568741 ; 568743 ; 568771 ; 568767 ; 568650 ; 560 70 ; 560 86 ; 562464 ; 562478 ;
Abstract
An improved process for the preparation of a polyhydric phenol by hydroxylation of a phenol with a peroxidic hydroxylating agent, is disclosed. The improvement resides in that before the hydroxylation, all or some of the mixture to be hydroxylated is treated with a cation exchanger.