Patent · US Expired

Continuous recovery of (meth)acrylic acid

US6413379B1 · kind B1 · utility

13Cited by

10References

9Claims

0Family size

Assignee

BASF SE

Inventors

Otto Machhammer · Mannheim, DE
Susanne Haupt · Offenbach, DE
Volker Schliephake · Schifferstadt, DE
Jürgen Schröder · Ludwigshafen, DE

Key dates

Filing date	Jul 29, 1999
Grant date	Jul 2, 2002
Priority date	—
Expiry date	Jul 29, 2019

Classification

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

Abstract

A process for the continuous recovery of (meth)acrylic acid from a liquid starting mixture containing (meth)acrylic acid, a high-boiling organic solvent and low boilers, medium boilers and high boilers is proposed, the mixture being separated into a first part-stream (a), which, in addition to (meth)acrylic acid, contains the low boilers and a part each of the medium boilers and high boilers, and a second part-stream (b), which contains the predominant part of the (meth)acrylic acid and is completely or virtually completely free of low boilers, and the (meth)acrylic acid being recovered from the part-stream (b).

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