Preparation of a catalyst containing copper and silica

Details Preparation of a catalyst containing copper and silica Preparation of a catalyst containing copper and silica

1987-01-30

1988-10-25

Metz, Andrew H.

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Silicon containing or process of making

502243, 502174, 502201, B01J 2108, B01J 2118

Patent

active

047804483

ABSTRACT:
A catalyst containing copper and silica is prepared by a process in which an aqueous alkali metal silicate solution containing from 1 to 26% by weight of SiO.sub.2 is brought to a pH of from 0.5 to 2.0 with nitric acid, an aqueous copper nitrate solution containing from 5 to 15% by weight of Cu is added, after the addition of the nitric acid, so that a clear solution containing from 0.18 to 3.0 moles of Cu per mole of SiO.sub.2 is formed, the resulting solution is mixed with an aqueous alkali metal carbonate solution at from 40.degree. to 80.degree. C., the pH of the mixture being kept at from 7.5 to 8.5, and the precipitated material is separated off, dried, calcined by heating at from 250.degree. to 400.degree. C. and pressed in a conventional manner to give catalyst moldings. The catalyst thus obtained is used for the hydrogenation of dialkyl dicarboxylates to diols.

REFERENCES:
patent: 3494734 (1970-02-01), Nokamura
patent: 3756964 (1973-09-01), Frazee et al.
patent: 4536491 (1985-08-01), Fremont

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