Carrier-supported catalyst and process for making it

Details Carrier-supported catalyst and process for making it Carrier-supported catalyst and process for making it

B - Operations, Transporting

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252/69, 260/682.

B01J 23/76 (2006.01) B01J 23/882 (2006.01) B01J 27/19 (2006.01) C07C 5/48 (2006.01) C07C 15/067 (2006.01)

Patent

CA 1128919

ABSTRACT OF THE DISCLOSURE The invention relates to a carrier-supported catalyst comprising oxides of cobalt and phosphorus and at least one of the oxides of molybdenum and potassium in the atomic ratio of Co1P1-2Mo0-0.05K0-0.5 on a porous carrier material, and to a process for making it. To this end, the process provides a) for a dry porous carrier material to he saturated with water up to 40 to 80 % of its predetermined saturation value; b) for the carrier material treated as under a) to be impregnated either at least once with an aqueous solution of water-soluble compounds of cobalt and phosphorus, molybdenum and/or potassium or repeatedly and successive- ly, each impregnation being interrupted by an intermediary drying period as specified under c), with an aqueous solution of a water-soluble com- pound of merely one of the elements aforesaid, the aqueous solution being used in either case in a quantity which is at most necessary for complete saturation; c) for the carrier material to be dried after each impregnation over a period of 2 to 20 hours at 350 to 500 K; and d) for the carrier material treated as described under a) through c) to be sintered over a period of 0.5 to 4 hours at 550 to 1000 K, in a stream of air. The carrier-supported catalyst finds use in the production of styrene by sub- jecting ethylbenzene to oxidative dehydrogenation with molecular oxygen in gas phase.

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