Silver catalyst for ethylene epoxidation

Details Silver catalyst for ethylene epoxidation Silver catalyst for ethylene epoxidation

1975-12-29

1978-07-25

Shine, W. J.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

252476, 26034834, B01J 2104, B01J 2366

Patent

active

041028201

ABSTRACT:
A novel, stable, activated silver catalyst useful in the vapor phase epoxidation of ethylene with an oxygen-containing epoxidizing agent is provided. The novel catalyst is prepared by impregnating certain inorganic porous supports with a silver caboxylate/amine complex impregnating solution of a silver carboxylate solubilized in an amine-containing complexing agent selected from:
(a) diamines wherein at least one amino moiety is primary or secondary, but no more than one is primary;
(b) polyamines containing at least three amino moieties wherein at least one is primary or secondary; or
(c) amino ethers containing at least one ether linkage and at least one amino moiety which is primary or secondary;
And heating the impregnated support at temperatures of from about 50.degree. C to about 300.degree. C to evaporate volatiles, decompose the complex and activate the catalyst. The novel catalyst shows excellent mechanical strength and superior yield and selectivity in air epoxidation processes.

REFERENCES:
patent: 3702259 (1972-11-01), Nielsen

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