Patent · US Expired

Preparation of acrylic acid and esters

US5817865A · kind A · utility

41Cited by

11References

7Claims

0Family size

Assignee

BASF SE

Inventors

Otto Machhammer · Mannheim, DE
Toni Dockner
Gerd-Jurgen Engert · Ludwigshafen, DE
Theo Proll · Bad Dürkheim, DE

Key dates

Filing date	Jan 3, 1997
Grant date	Oct 6, 1998
Priority date	—
Expiry date	Jan 3, 2017

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02P20/582
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

A process for preparing acrylic acid and/or esters comprises the steps of: PA1 (a) catalytic gas phase oxidation of propene and/or acrolein to acrylic acid to obtain a gaseous reaction product comprising acrylic acid, PA1 (b) solvent absorption of the reaction product, PA1 (c) distillation of the solvent loaded with acrylic acid to obtain a crude acrylic acid and the solvent, PA1 (d) purification of the crude acrylic acid by crystallization and PA1 (e) optionally esterification of the crystalline acrylic acid.

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