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:
Jun. 10, 1997
Filed:
Aug. 09, 1995
Applicant:
Inventors:
Lishan Tong, Beijing, CN;
Haijing Wang, Beijing, CN;
Weisun Feng, Beijing, CN;
Guoqiang Gao, Beijing, CN;
Xiangwei Li, Beijing, CN;
Jinghui Deng, Beijing, CN;
Xinjie Zhang, Beijing, CN;
Assignees:
China Petrochemical Corporation, China, CN;
Research Institute of Petroleum Processing SINOPEC, China, CN;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
549325 ; 502307 ;
Abstract
A process for vapor phase hydrogenation of maleic anhydride and/or succinic anhydride to .gamma.-butyrolactone, comprising contacting an alcoholic solution of a feedstock anhydride with reduced Cu-Zn-Cr-Zr catalyst under the conditions of hydrogenation.