Brinks Hofer Gilson & Lione
Process for the preparation of gamma-butyrolactone
 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. 
Research Institute of Petroleum Processing SINOPEC China Petrochemical Corporation
C
C07D
inventional
Xinjie Guoqiang Weisun Lishan Haijing Xiangwei Jinghui
Zhang Gao Feng Tong Wang Li Deng