Patent · US Expired

Separation of (meth)acrylic acid by rectification

US6228227A · kind A · utility

4Cited by

7References

15Claims

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	Mar 24, 1999
Grant date	May 8, 2001
Priority date	—
Expiry date	Mar 24, 2019

Classification

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

Abstract

In 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.