Patent · US Expired

Continuous separation of maleic anhydride from gaseous reaction mixtures

US4562283A · kind A · utility

7Cited by

7References

2Claims

0Family size

Assignee

BASF SE

Inventors

Rolf Schnabel · Schifferstadt, DE
Hans-Martin Weitz · Bad Dürkheim, DE

Key dates

Filing date	Dec 14, 1984
Grant date	Dec 31, 1985
Priority date	—
Expiry date	Dec 14, 2004

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C51/573
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

Maleic anhydride is separated off from gaseous reaction mixtures by a continuous process in which the gaseous reaction mixture containing the maleic anhydride is brought into contact with butanol, the gaseous substances obtained in this procedure are brought into contact with butyl maleate by a countercurrent method, and the liquid product is removed from the bottom.

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