Patent · US Active

Process for preparing acrylic acid

US7566804B2 · kind B2 · utility

3Cited by

6References

25Claims

0Family size

Assignee

BASF SE

Inventors

Armin Diefenbacher · Germersheim, DE
Ulrich Hammon · Mannheim, DE
Volker Schliephake · Schifferstadt, DE
Georg Sieder · Bad Dürkheim, DE

Key dates

Filing date	Jan 25, 2008
Grant date	Jul 28, 2009
Priority date	—
Expiry date	Jan 25, 2028

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C51/48
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

A process for preparing acrylic acid, in which an acrylic acid-comprising product gas mixture obtained by catalytic gas phase partial oxidation of a C3 precursor of acrylic acid is fractionally condensed in a condensation column provided with internals ascending into itself with side draw removal of crude acrylic acid and with liquid phase draw removal of acrylic acid-comprising acid water, and acrylic acid present in acid water is taken up into an extractant and then removed from the extractant and recycled into the condensation column, or taken up in aqueous metal hydroxide, or sent to further purification of the crude acrylic acid.

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