Process for preparing acrylic acid from ethylene oxide and carbon monoxide

US9115070B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Marek Pazicky · Ludwigshafen am Rhein, DE
• Christian Raith · Mannheim, DE
• Rocco Paciello · Bad Dürkheim, DE
• Raphael Heinrich Brand · Roßdorf, DE
• Marco Hartmann · Jockgrim, DE
• Klaus Joachim Mueller-Engel · Blankenloch, DE
• Peter Zurowski · Landau, DE
• Wolfgang Fischer · Meerbusch, DE

Key dates

• Filing date: Jul 16, 2013
• Grant date: Aug 25, 2015
• Expiry date: Jul 16, 2033

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G63/90
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A process for preparing acrylic acid from ethylene oxide and carbon monoxide, in which ethylene oxide is carbonylated in an aprotic solvent with carbon monoxide in the presence of a cobalt catalyst system to give poly-3-hydroxypropionate, the cobalt content in the poly-3-hydroxypropionate formed is reduced with the aid of water and/or an aqueous solution as a precipitation and/or wash liquid, and the poly-3-hydroxypropionate is subsequently split by thermolysis to give acrylic acid.