Patent · US Expired

Continuous process for producing gamma-butyrolactone by catalytic hydrogenation of maleic anhydride

US4025534A · kind A · utility

5Cited by

1References

12Claims

0Family size

Assignee

Deutsche Texaco Aktiengesellschaft · DE

Inventors

Lothar Sandhack
Werner Webers · Dinslaken, DE
Georg Michalczyk
Karl-Heinz Gluzek · Alpen, DE

Key dates

Filing date	Jan 12, 1976
Grant date	May 24, 1977
Priority date	—
Expiry date	Jan 12, 1996

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01J23/8913
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

A continuous process for producing gamma-butyrolactone by hydrogenating maleic anhydride in two stages in the presence of a catalyst composed of cobalt oxide and palladium on a support of silica. The hydrogenation is performed at a hydrogen pressure of 100 to 125 atmospheres and at a temperature of 50.degree. to 100.degree. C. in the first stage and at 190.degree. to 220.degree. C. in the second stage.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.