Patent · US Active

Process and plant for recovering acrylic acid

US9701612B2 · kind B2 · utility

0Cited by

3References

11Claims

0Family size

Assignee

BASF SE

Inventors

Ulrich Hammon · Mannheim, DE
Thomas Walter · Dallas, US
Markus Ottenbacher · Wilhelmsfeld, DE
Frank Huetten · Mannheim, DE

Key dates

Filing date	Sep 18, 2015
Grant date	Jul 11, 2017
Priority date	—
Expiry date	Sep 18, 2035

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01J2219/24
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A process for recovering acrylic acid, including: a) division of a heated mother acid stream in direction of an absorption a condensation column and a dissociation column; b) feeding of a heated mother acid substream as runback to the dissociation column; c) feeding-in of at least one stripping gas stream to the dissociation column; d) feeding-in of a secondary component stream comprising oligomeric acrylic acid from the absorption column to the dissociation column; e) dissociation of part of oligomeric acrylic acid in the dissociation column to give monomeric acrylic acid; f) removal of secondary components comprised in the secondary component stream in the dissociation column; g) discharge of monomeric acrylic acid as gas mixture with introduced circulating stripping gas stream from the dissociation column; and h) feeding-in of the gas mixture to the absorption column.

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