Patent · US Expired

Separation of (meth) acrylic acid by rectification

US5961790A · kind A · utility

8Cited by

6References

2Claims

0Family size

Assignee

BASF SE

Inventors

Holger Herbst · Bischofswerda, DE
Gerhard Nestler · Ludwigshafen, DE
Jerry Darlington · Lake Jackson, US
Ulrich Hammon · Mannheim, DE

Key dates

Filing date	Dec 14, 1994
Grant date	Oct 5, 1999
Priority date	—
Expiry date	Dec 14, 2014

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S203/22
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

A process for the separation by rectification of (meth)acrylic acid from a mixture containing (meth)acrylic acid and an inert hydrophobic organic liquid having a boiling point higher than that of (meth)acrylic acid as main constituents and also lower aldehydes as secondary constituents, a primary amine and/or a salt thereof are added.

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