The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 25, 2015
Filed:
Jul. 16, 2013
Basf SE, Ludwigshafen, DE;
Marek Pazicky, Heidelberg, DE;
Christian Raith, Mannheim, DE;
Rocco Paciello, Bad Duerkheim, DE;
Raphael Heinrich Brand, Rossdorf, DE;
Marco Hartmann, Woerth, DE;
Klaus Joachim Mueller-Engel, Stutensee, DE;
Peter Zurowski, Landau, DE;
Wolfgang Fischer, Lingenfeld, DE;
BASF SE, Ludwigshafen, DE;
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.