Pd/SiO.sub.2 Hydrogenation catalyst suitable for H.sub.2 O.sub.2

Details Pd/SiO.sub.2 Hydrogenation catalyst suitable for H.sub.2 O.sub.2 Pd/SiO.sub.2 Hydrogenation catalyst suitable for H.sub.2 O.sub.2

1979-02-26

1980-12-23

Dees, Carl F.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

252460, B01J 2906, B01J 2912

Patent

active

042409330

ABSTRACT:
An amorphous silica supported palladium catalyst is provided which also contains a small amount of an additive metal compound selected from an oxide, hydroxide and carbonate of zirconium, thorium, hafnium, cerium, titanium and aluminum. By use of particular preparation conditions and the amount of additive metal salt raw material used, the additive metal compound deposits from solution before or simultaneously with a palladium compound. The additive metal compound deposits on the silica support and serves as a base for the subsequently deposited palladium compound which is later reduced to palladium metal. The described catalyst is particularly suitable as a hydrogenation catalyst in a cyclic process for the manufacture of hydrogen peroxide.

REFERENCES:
patent: 2496265 (1950-02-01), Billisoly
patent: 2914382 (1959-11-01), Holmes et al.
patent: 3030186 (1962-04-01), Kreuz et al.
patent: 3271327 (1966-09-01), McEvoy et al.
patent: 3629145 (1971-12-01), Morikawa et al.
patent: 3684742 (1972-08-01), Pollitzer
patent: 3909452 (1975-09-01), Acres

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