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:
Nov. 15, 1977
Filed:
Oct. 20, 1975
Applicant:
Inventor:
Wolfgang Biedermann, Krefeld-Bockum, DT;
Assignee:
Bayer Aktiengesellschaft, Leverkusen, DT;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ; C07C / ;
U.S. Cl.
CPC ...
2606 / ; 252471 ;
Abstract
Continuous process for production of d,l, menthol by hydrogenation of thymol or other compound having the carbon skeleton of menthol and which is substituted by oxygen (oxygen or hydroxy) in the 4-position. A cobalt-manganese catalyst is used which contains 10 to 40% by weight of manganese based on the total quantity of oxidic cobalt and oxidic manganese. High conversion are obtained and the built up of by-products is low. The catalyst is similarly effective for rearrangement of isomers of menthol to product d,l-menthol.