Patent Number: 6,166,248

Title: Process for the separation of acrylic acid

Abstract: A process for isolating acrylic acid forward during catalytic gas phase oxidation of propene, which entails separating acrylic acid from the gas phase oxidation reaction using an absorbent containing biphenyl, diphenyl ether or dimethyl phthalate; and extracting acrylic acid from acid water of the gas phase reaction with a solvent containing biphenyl, diphenyl ether or dimethyl phthalate.

Inventors: Heida; Bernd (Ellerstadt, DE), Thiessen; Fritz (Ludwigshafen, DE), Hammon; Ulrich (Mannheim, DE), Dams; Albrecht (Wachenheim, DE)

Assignee: BASF Aktiengesellschaft

International Classification: C07C 51/42 (20060101); C07C 51/48 (20060101); C07C 051/16 (); C07C 241/00 ()

Expiration Date: 12/26/2017