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. 10, 1991
Filed:
Sep. 14, 1990
Applicant:
Inventors:
Chihiro Miyazawa, Kurashiki, JP;
Kazunari Takahashi, Kurashiki, JP;
Hiroshi Kameo, Kurashiki, JP;
Shinji Isogai, Kurashiki, JP;
Masayuki Otake, Yokohama, JP;
Assignee:
Mitsubishi Kasei Corporation, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
549325 ; 549326 ; 502213 ;
Abstract
A process for producing a lactone by reacting in a hydrogenation reaction zone a dicarboxylic acid, a dicarboxylic acid anhydride and/or a dicarboxylic acid ester with hydrogen in a liquid phase using a solvent in the presence of a catalyst comprising ruthenium and an organic phosphine, which process comprises the following steps (1) to (6):