Method of dehydrating 3-hydroxypropionic acid to form acrylic acid

US10252970B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Tim Blaschke · Stuttgart, DE
• Ortmund Lang · Quirnbach, DE
• Nicolai Tonio Wörz · Darmstadt, DE
• Christian Raith · Mannheim, DE
• Marco Hartmann · Jockgrim, DE
• Marta Zajaczkowski-Fischer · Schifferstadt, DE

Key dates

• Filing date: Aug 21, 2014
• Grant date: Apr 9, 2019
• Expiry date: Sep 11, 2034

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C57/04
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to a process for dehydrating aqueous 3-hydroxypropionic acid to acrylic acid in the liquid phase, wherein aqueous acrylic acid is removed continuously from the liquid phase and the aqueous 3-hydroxypropionic acid and/or the liquid phase have a high content of oligomeric 3-hydroxypropionic acid.