Aging resistance shape selective catalyst with enhanced activity

Details Aging resistance shape selective catalyst with enhanced activity Aging resistance shape selective catalyst with enhanced activity

1981-12-16

1983-09-06

Dees, Carl F.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

208120, B01J 2906, B01J 3710

Patent

active

044028660

ABSTRACT:
A shape selective catalyst useful in a variety of hydrocarbon conversion processes such as cracking, hydrocracking, hydrofining, isomerization, dewaxing, and the like, is obtained from the process which comprises steaming a precursor crystalline aluminosilicate in the hydrogen or ammonium form having a silica-alumina ratio greater than 12, a constraint index between about 1 and about 12 and an alpha value greater than about 20 in the presence of ammonia to provide a crystalline aluminosilicate having an alpha value of from about 10 to about 150 and therafter ion-exchanging the steamed precursor with an alkali metal cation under conditions effective to further reduce the alpha value of the crystalline aluminosilicate to less than about 10.

REFERENCES:
patent: 3213013 (1965-10-01), Arey, Jr.
patent: 3404086 (1968-10-01), Plank et al.
patent: 3541027 (1970-11-01), Lapides
patent: 4149960 (1979-04-01), Garwood et al.
patent: 4247388 (1981-01-01), Banta et al.
patent: 4284529 (1981-08-01), Shihabi
Ward, Journal of Catalysis, 11, 238-250 (1968).
T. Y. Yan, Journal of Catalysis, 25, 204-211 (1972).
Minachev, et al., Soviet Scientific Reviews, Section B, Chemistry Reviews, vol. 2 1-6 (1980).

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