Catalysts for para-ethyltoluene dehydrogenation

Details Catalysts for para-ethyltoluene dehydrogenation Catalysts for para-ethyltoluene dehydrogenation

B - Operations, Transporting

01

J

252/69, 260/682.

B01J 23/86 (2006.01) C07C 5/333 (2006.01) C07C 15/18 (2006.01)

Patent

CA 1208622

CATALYSTS FOR PARA-ETHYLTOLUENE DEHHOROGENATION ABSTRACT Para-ethyltoluene dehydrogenation catalyst compositions and processes for using such catalysts are provided. The catalyst compositions comprise a catalytically active iron compound, e.g., iron oxide; a potassium catalyst promoter, e.g., potassium carbonate; an optional chromium compound stabilizer, e.g., chromic oxide, and a gallium compound, e.g., gallium trioxide. Utilization of particular amounts of gallium compound in dehydrogenation catalyst compositions of this type will provide a catalyst especially suitable for promoting the selective dehydrogenation of para-ethyltoluene to form para-methylstyrene with sustained catalyst activity, with minimized aromatic ring loss and with minimal formation of "popcorn" polymer from the reaction effluent.

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