Preparation of coated catalysts

Details Preparation of coated catalysts Preparation of coated catalysts

1980-03-03

1981-10-27

Shine, W. J.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

252461, 252467, 252469, 252470, 252477R, 427215, 562534, 562535, B01J 2322, B01J 2328, B01J 2330, B01J 2372

Patent

active

042972477

ABSTRACT:
A coated catalyst comprising (a) an inert carrier having a particle diameter of not less than 100 .mu.m and a surface area of up to 20 m.sup.2 /g and (b) a coating which firmly adheres to the outer surface and in the edge zone, near the surface, of the carrier particles, and which contains the catalytic material, can be prepared by applying the catalytic material in the form of a powder of particle size not more than 300 .mu.m, in the presence of water, to the vigorously agitated carrier by a process wherein catalytically active material in an amount of from 1 to 40 g/minute/liter of carrier, and water in a weight ratio of catalytic material to water of from 1:1 to 30:1, are applied continuously and spatially separate from one another, each at a constant speed, onto the carrier particles, which may or may not have been pre-moistened with water in an amount of up to 95% of the particle absorbency, in such a way that the water content of the coating which forms is less than the maximum degree of saturation of the coating of catalytic material.

REFERENCES:
patent: 3956377 (1976-05-01), Dolhyj et al.
patent: 4077912 (1978-03-01), Dolhyj et al.

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