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:
Jun. 08, 2010
Filed:
Jul. 09, 2007
Applicants:
Jean-luc Dubois, Millery, FR;
Stephanie Serreau, Oullins, FR;
Fabienne Desdevises, Millery, FR;
Inventors:
Assignee:
Arkema France, Colombes, FR;
Primary Examiner:
Int. Cl.
CPC ...
C07C 51/42 (2006.01);
U.S. Cl.
CPC ...
Abstract
The invention relates to a method for preparing acrylic acid by oxidizing propylene and then acrolein, involving the recycling of gases that had not reacted by means of a partial oxidation of the propane, in parallel, at the end of the acrylic acid recovery step, then returning, to the propylene-converting reactor, a gas rich in both propane and propylene having been subjected to a second passage in the acrylic acid recovery column.