Process for the production of granulated dicalcium phosphate dih

Details Process for the production of granulated dicalcium phosphate dih Process for the production of granulated dicalcium phosphate dih

1991-03-01

1992-04-28

Langel, Wayne

Chemistry of inorganic compounds

Phosphorus or compound thereof

Oxygen containing

C01B 2532

Patent

active

051087286

ABSTRACT:
A process is disclosed for the production of granulated dicalcium phosphate dihydrate from fine-grained, powered dicalcium phosphate dihydrate, wherein 80 t0 95% of dicalcium phosphate dihydrate with a grain size of less than 120 .mu.m and 20 to 5% of calcium hydroxide with a grain size of less than 120 .mu.m are dry mixed and continuously sprayed and granulated in a fluidized bed with 20 to 50% of water, relative to the amount of solids, in which is contained an amount of phosphoric acid sufficient for the neutralization of the calcium hydroxide. The granulate obtained is dried at a temperature of 150.degree. to 200.degree. C., and the portions of coarse and fine grained material are optionally sieved off.

REFERENCES:
patent: 3294486 (1966-12-01), Cremer et al.
patent: 3304249 (1967-02-01), Katz
patent: 3467495 (1965-12-01), Nielsson
patent: 3467497 (1969-09-01), Nielsson
patent: 3620753 (1971-11-01), Cremer et al.
patent: 4166839 (1991-09-01), Skauli et al.
patent: 4675188 (1987-06-01), Chu

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