Process for reactivating platinum catalysts

Details Process for reactivating platinum catalysts Process for reactivating platinum catalysts

B - Operations, Transporting

01

J

252/87

B01J 23/42 (2006.01) B01J 23/96 (2006.01) B01J 37/20 (2006.01) C01B 21/14 (2006.01)

Patent

CA 1043761

ABSTRACT OF THE DISCLOSURE A process for rejuvenating platinum catalysts is disclosed. It comprises treating a platinum catalyst having reduced activity and selectivity (a) in a first stage with an acid solution of a sulfur compound which liberates sulfurous acid in acid medium, and a hydroxylammonium salt, said treatment being conducted in the absence of oxidizing agents capable of oxidizing sulfurous acid to sulfate, and (b) in a second stage with an acid solution of platinum (II) or platinum (IV) compounds in the presence of hydrogen. -2-

221827

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