Rohm and Haas Company

Nitin Chadda

Scott S Han

Anne Mae Gaffney

Leonard Edward Bogan, Jr

Sanjay Chaturvedi

Mark A Silvano

Daniel J Martenak

Abraham Benderly

Donald Lee Zolotorofe

Andrew Michael Lemonds

Elsie Mae Vickery

Peter David Klugherz

Douglass Sevon

Fernando A P Cavalcanti

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.

Integrated process for preparing a carboxylic acid from an alkane

The present invention relates to an improved alkane (amm)oxidation process in which sulfur-bearing impurities present in the alkane feedstock are removed upstream from the (amm)oxidation reaction.

Method for producing unsaturated carboxylic acids and nitriles

An improved process for the production of unsaturated carboxylic acids and unsaturated nitrites from their corresponding Cto Calkanes, or mixtures of Cto Calkanes and alkenes, that involves a multi-stage reaction system which employs both separation of the oxidation product from one or more intermediate effluent streams, as well as feeding additional oxygen to reaction zones subsequent to the first reaction zone.

Process for the selective (amm)oxidation of lower molecular weight alkanes and alkenes

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Radnor, PA, United States of America

Nitin Chadda