Catalyst regeneration

Details Catalyst regeneration Catalyst regeneration

B - Operations, Transporting

01

J

252/53

B01J 23/92 (2006.01) B01J 27/28 (2006.01)

Patent

CA 1092592

E.I. du Pont de Nemours and Company (D'Amors, Michael B. & Sleight, Arthur W.) ABSTRACT Process for regenerating a spent catalyst, which catalyst contains potassium, cobalt, nickel, iron, bismuth, phosphorus and molybdenum and sufficient oxygen to satisfy the valence of the other elements therein, on a support, e.g., silicon oxide, wherein at least a portion of the molybdenum has been lost during ammoxidation, comprising impregnating said catalyst with bismuth and molybdenum in solution so that at least some of the molybdenum lost is replaced, e.g., a typical impregnating solution is prepared by dissolving molybdenum trioxide and phosphoric acid in water, adding nitric acid and finally dissolving bismuth nitrate pentahy- drate in the resultant solution.

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