Process for crystallizing calcium nitrate

Details Process for crystallizing calcium nitrate Process for crystallizing calcium nitrate

1975-05-12

1977-02-15

Wolk, Morris O.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Alkaline earth metal

23304, 423395, C01F 1144

Patent

active

040083098

ABSTRACT:
Large-sized calcium nitrate tetrahydrate particles are obtained by dissolving phosphate rock in concentrated nitric acid, cooling the resulting solution, intentionally terminating the crystallization of the calcium nitrate tetrahydrate when only 40 to at most 60% of the calcium in solution has been crystallized, to form a mother liquor, recovering a portion of the mother liquor equivalent to 20 to 80% of the solution by removing the calcium nitrate crystals therefrom; combining the remainder of the suspension with the separated mother liquor and recovering the crystals with a particle size of from 70 to 1100 microns.

REFERENCES:
patent: 1816285 (1931-07-01), Johnson
patent: 1939351 (1933-12-01), Johnson
patent: 2252280 (1941-08-01), Balz
patent: 2609271 (1952-09-01), Plusje
patent: 2813777 (1957-11-01), Swenson
patent: 3205062 (1965-09-01), Gattiker et al.

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