Title:
【発明の名称】活性触媒を用いた高転化率及び高選択率のγ―ブチロラクトンへの無水マレイン酸の気相接触水素添加方法
Document Type and Number:
Japanese Patent JPH05505975
Kind Code:
A
Abstract:
Vapor phase catalytic hydrogenation of maleic anhydride to gamma-butyrolactone is achieved in a conversion of 95% or more and a selectivity of 80% or more during a prolonged period of production. The process uses an activated catalyst prepared by reducing a catalyst composition comprising 30-65% by weight of CuO, 18-50% by weight of ZnO and 8-22% by weight of Al2O3, and activating the reduced catalyst composition in hydrogen at an activation temperature of at least 400 DEG C., preferably 400 DEG to 525 DEG C., and optimally about 425 DEG C. The process suitably is carried out under predetermined and advantageous process conditions, including a defined molar ratio of hydrogen to maleic anhydride in the vapor reactant stream, a selected pressure during hydrogenation, a defined feed rate space velocity, a predetermined contact time, and a suitable reaction temperature.
Inventors:
Taylor paul dee
De Thomas Wold
Buchanan Donald W. Junior
De Thomas Wold
Buchanan Donald W. Junior
Application Number:
JP50765891A
Publication Date:
September 02, 1993
Filing Date:
April 08, 1991
Export Citation:
Assignee:
ISP INVESTMENTS INC.
International Classes:
B01J23/80; B01J35/10; B01J37/18; C07B61/00; C07D307/33; C07D315/00; (IPC1-7): B01J23/80; B01J35/10; C07D307/33
Attorney, Agent or Firm:
Akihide Sugimura (1 outside)