Catalyst – solid sorbent – or support therefor: product or process – Zeolite or clay – including gallium analogs – And additional al or si containing component
Patent
1988-08-25
1989-09-19
Dees, Carl F.
Catalyst, solid sorbent, or support therefor: product or process
Zeolite or clay, including gallium analogs
And additional al or si containing component
502 64, B01J 2928
Patent
active
048681466
ABSTRACT:
A surface-inactive shape selective metallosilicate catalyst, useful for the conversion of lower molecular weight olefins to liquid hydrocarbons such as gasoline, distillate, and high viscosity lube oils, is prepared by forming a silica shell on a medium pore metallosilicate core by crystallizing silica in the presence of fluoride ion onto the surface of the core.
A novel catalyst composition is provided comprising an inner core portion and an outer portion disposed as a porous shell around the inner portion, wherein the inner portion consists essentially of metallosilicate zeolite having a medium pore structure, such as ZSM-5 or ZSM-23, and the outer portion comprising a fluoride-containing crystalline shell consisting essentially of silica substantially free of acid sites and having substantially the same crystalline structure as the inner core portion.
REFERENCES:
patent: 4145315 (1979-03-01), Rodewald
patent: 4444902 (1984-04-01), Chang et al.
Chu Pochen
Schwartz Albert B.
Dees Carl F.
McKillop Alexander J.
Mobil Oil Corporation
Speciale Charles J.
Wise L. Gene
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