Patent · US Expired

Method for separating maleic anhydride from maleic anhydride-containing mixtures by stripping

US6329532A · kind A · utility

0Cited by

4References

8Claims

0Family size

Assignee

BASF SE

Inventors

Rolf Pinkos · Bad Dürkheim, DE
Ralf-Thomas Rahn · Mannheim, DE

Key dates

Filing date	Aug 14, 2000
Grant date	Dec 11, 2001
Priority date	—
Expiry date	Aug 14, 2020

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C67/08
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

The invention relates to a process for the separation of maleic anhydride from the maleic anhydride-containing reactor offgases from the preparation of maleic anhydride by the oxidation of hydrocarbons, in which this gas stream is brought into contact with a high-boiling, inert absorbent for maleic anhydride and maleic anhydride is separated from the resultant liquid absorbate phase by vapor stripping, where the stripping agent used is an alcohol, and at least some of the maleic anhydride is reacted with the alcohol to give the ester.

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