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:
Jul. 22, 1980
Filed:
Sep. 15, 1978
Applicant:
Inventors:
Hermann Seifert, Cologne, DE;
Helmut Waldmann, Leverkusen, DE;
Wulf Schwerdtel, Leverkusen, DE;
Wolfgang Swodenk, Odenthal-Gloebusch, DE;
Assignee:
Bayer Aktiengesellschaft, Leverkusen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ; C07C / ;
U.S. Cl.
CPC ...
568771 ; 568803 ;
Abstract
A process for the production of pyrocatechol and hydroquinone by the hydroxylation of phenol in the nucleus with hydrogen peroxide, wherein phenol is reacted at the start of the reaction with substantially anhydrous hydrogen peroxide and wherein the reaction is carried out in the presence of a strong acid.