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Integrated process for preparing a carboxylic acid from an alkane

Patent ·
OSTI ID:1034167
 [1];  [2];  [3]
  1. Elkins Park, PA
  2. Radnor, PA
  3. Fairless Hills, PA
+ Show Author Affiliations

The present invention relates to an integrated process for producing unsaturated carboxylic acids from the corresponding C.sub.2-C.sub.4 alkane. The process begins with performance of thermally integrated dehydrogenation reactions which convert a C.sub.2-C.sub.4 alkane to its corresponding C.sub.2-C.sub.4 alkene, 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.

Research Organization:
Rohm and Haas Company (Philadelphia, PA)
Sponsoring Organization:
USDOE
DOE Contract Number:
FC36-04GO14272
Assignee:
Rohm and Haas Company (Philadelphia, PA)
Patent Number(s):
8,080,686
Application Number:
12/316,322
OSTI ID:
1034167
Country of Publication:
United States
Language:
English

References (5)

Supported Vanadia Catalysts for Dehydrogenation of Ethylbenzene with CO2 journal December 2005
CO2 Dehydrogenation of Propane over Cr-MCM-41 Catalyst book December 2003
Oxidative dehydrogenation of propane on rare earth vanadates influence of the presence of CO2 in the feed book December 1995
The active role of CO2 at low temperature in oxidation processes: the case of the oxidative dehydrogenation of propane on NiMoO4 catalysts journal March 2003
Opportunities for Catalysis in The 21st Century. A report from the Basic Energy Sciences Advisory Committee report May 2002

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Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY