Compositions – Preservative agents – Anti-oxidants or chemical change inhibitants
Patent
1976-04-20
1977-10-04
Garvin, Patrick P.
Compositions
Preservative agents
Anti-oxidants or chemical change inhibitants
252412, 2604653, B01J 2392, C07C12102
Patent
active
040523322
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 pentahydrate in the resultant solution.
REFERENCES:
patent: B260945 (1975-01-01), Hausweiller et al.
patent: 3236782 (1966-02-01), Koch
patent: 3629148 (1971-12-01), Dominik et al.
patent: 3746657 (1973-07-01), Miller et al.
patent: 3766092 (1973-10-01), Honda et al.
patent: 3882159 (1975-05-01), Callahan et al.
patent: 3956181 (1976-05-01), Grasselli et al.
D'Amore Michael Brian
Sleight Arthur William
E. I. Du Pont de Nemours and Company
Garvin Patrick P.
Konopka P. E.
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