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:
Dec. 20, 2011
Filed:
Dec. 11, 2008
Abraham Benderly, Elkins Park, PA (US);
Nitin Chadda, Radnor, PA (US);
Douglass Sevon, Fairless Hills, PA (US);
Abraham Benderly, Elkins Park, PA (US);
Nitin Chadda, Radnor, PA (US);
Douglass Sevon, Fairless Hills, PA (US);
Rohm and Haas Company, Philadelphia, PA (US);
Abstract
The present invention relates to an integrated process for producing unsaturated carboxylic acids from the corresponding C-Calkane. The process begins with performance of thermally integrated dehydrogenation reactions which convert a C-Calkane to its corresponding C-Calkene, and which involve exothermically converting a portion of an alkane to its corresponding alkene by oxidative dehydrogenation in an exothermic reaction zone, in the presence of oxygen and a suitable catalyst, and then feeding the products of the exothermic reaction zone to an endothermic reaction zone wherein at least a portion of the remaining unconverted alkane is endothermically dehydrogenated to form an additional quantity of the same corresponding alkene, in the presence of carbon dioxide and an other suitable catalyst. The alkene products of the thermally integrated dehydrogenation reactions are then provided to a catalytic vapor phase partial oxidation process for conversion of the alkene to the corresponding unsaturated carboxylic acid or nitrile. Unreacted alkene and carbon dioxide are recovered from the oxidation product stream and recycled back to the thermally integrated dehydrogenation reactions.