Silica microspheres, method of improving attrition resistance

Details Silica microspheres, method of improving attrition resistance Silica microspheres, method of improving attrition resistance

1990-09-25

1992-07-07

Group, Karl

Chemistry of inorganic compounds

Silicon or compound thereof

Oxygen containing

423584, 501 53, 501 80, 501133, 502261, 502262, C01B 3312

Patent

active

051281147

ABSTRACT:
High-strength, non-agglomerated uniform porous microspheres of silica produced by spray drying a mixture comprising a colloidal silica sol and an additive selected from ammonium citrate or urea; an attrition resistant catalytic composite consisting essentially of metal crystallites such as palladium, platinum-palladium on said silica microsphere and method for preparing the same; and an improved process for making hydrogen peroxide from the direct combination of hydrogen and oxygen in the presence of said attrition resistant catalytic composite.

REFERENCES:
patent: 3301635 (1965-07-01), Bergna et al.
patent: 3591518 (1971-07-01), McMillan
patent: 4010242 (1977-03-01), Iler et al.
patent: 4376724 (1983-03-01), Mita et al.
patent: 4420420 (1983-12-01), Mita et al.
patent: 4832938 (1989-05-01), Gosser et al.
patent: 4913966 (1990-04-01), Garvey et al.
"Adsordents, Catalysts, Supports and Their Manufacture", Jeemusu (1989) Chemical Abstract Japan JP 01307444 (Dec. 12, 1989).

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