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:
Sep. 28, 1993
Filed:
Sep. 24, 1992
Applicant:
Inventors:
Assignee:
Bayer Aktiengesellschaft, Leverkusen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ; C07C / ;
U.S. Cl.
CPC ...
568747 ;
Abstract
To prepare hydroxydiphenyls, a compound or a mixture of several compounds consisting of completely or partly hydrogenated hydroxydiphenyl is dehydrogenated catalytically in the gas phase, a catalyst being employed which comprises, as the active constituents, a combination of rhodium and one or more other platinum metal(s) from the group comprising platinum, palladium, ruthenium and iridium, and which comprises, as promoters, one or more alkali metal hydroxides and/or alkali metal sulphates, the support of which comprises chromium and manganese.