Process for production of attrition resistant antimony oxide con

Details Process for production of attrition resistant antimony oxide con Process for production of attrition resistant antimony oxide con

1977-05-18

1978-08-15

Dees, Carl F.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

252456, 252459, B01J 3700, B01J 2916

Patent

active

041070852

ABSTRACT:
A process for producing an attrition resistant antimony oxide containing fluidized bed catalyst comprising particles within a controlled particle size distribution comprising: (a) preparing a slurry containing a pentavalent antimony compound, one or more polyvalent metal compounds and a silica sol as essential components; (b) adjusting the pH of the above slurry to not more than 7 and heating the slurry at a temperature of from about 40.degree. C to about 150.degree. C for at least 20 minutes while keeping the mixture in a slurry state to form a slurry containing pentavalent antimony; (c) spray-drying the thus obtained slurry to form substantially spherical particles; (d) separating extremely fine particles and/or coarse particles unsuitable for practical use from the above obtained particles and returning these separated particles to the slurry prior to the spray-drying in step (c) as they are or after the pulverization thereof; and (e) calcining the particles from which the extremely fine particles and/or coarse particles have been removed at a temperature of from about 400.degree. C to about 1100.degree. C.

REFERENCES:
patent: 2665258 (1954-01-01), Lebeis, Jr.
patent: 2831652 (1958-04-01), Gemperle et al.
patent: 3686138 (1972-08-01), Yoshino et al.
patent: 3746659 (1973-07-01), Horzepa

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