Patent · US Active

Rectificative separation of an acrylic acid-containing liquid

US7560590B2 · kind B2 · utility

0Cited by

10References

15Claims

0Family size

Assignee

BASF SE

Inventors

Frank Hoefer · Bad Dürkheim, DE
Volker Schliephake · Schifferstadt, DE
Klaus Joachim Mueller-Engel · Blankenloch, DE

Key dates

Filing date	Sep 14, 2004
Grant date	Jul 14, 2009
Priority date	—
Expiry date	Mar 11, 2027

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C51/44
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

A process for rectificatively separating an acrylic acid-containing liquid, by withdrawing an acrylic acid-rich stream from the rectification column above the feed point and polymerization-inhibiting the upper section of the rectification column by means of diacrylic acid.

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