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:
Oct. 30, 2001
Filed:
Dec. 23, 1998
Rashmikant Maganlal Contractor, Wilmington, DE (US);
Mark William Andersen, Charlottesville, VA (US);
Daniel Campos, Wilmington, DE (US);
Gerard Hecquet, Courbevoie, FR;
Charlotte Pham, Saverne, FR;
Michel Simon, St. Avold, FR;
Mireille Stojanovic, Paris, FR;
Roland Kotwica, Pontpoint, FR;
Jean-Pierre Schirmann, Oullins, FR;
Other;
Abstract
An improved method for the selective vapor phase oxidation of acrolein to acrylic acid in a recirculating solids reactor system using a particulate molybdenum vanadate multimetal oxide as oxidant involving specific reactant concentrations (preferably 5 mol % to 30 mol % propylene, 0 to 20 mol % oxygen, 0 to 70 mol % water, and the remainder inert gas), solids particle size (20 to 300 micrometers), temperature (250 to 450° C.) and gas (1 to 15 seconds) and solids (2 to 60 seconds) residence times. Such a process leads to improved selectivity, conversion and solids conversion ratio.