Preparation of calcium fluoride from fluosilicic acid solutions

Details Preparation of calcium fluoride from fluosilicic acid solutions Preparation of calcium fluoride from fluosilicic acid solutions

1979-04-12

1981-04-28

Thomas, Earl C.

Chemistry of inorganic compounds

Silicon or compound thereof

Oxygen containing

423341, 423321R, 423462, 423490, C01B 3310, C01B 3324

Patent

active

042645638

ABSTRACT:
A fluosilicate material is added to a suspension of lime in water heated to a temperature at or near its boiling point to form a solid calcium fluoride product in which the silicon present in the fluosilicate material is in chemical combination with calcium. The amount of calcium in the suspension is in excess of stoichiometric for conversion of CaF.sub.2 of all of the fluorine in the fluosilicate and is sufficient to form chemical compounds of calcium and silicon from silicon in the fluosilicate.

REFERENCES:
patent: 2780523 (1957-02-01), Gloss
patent: 2914474 (1959-11-01), Hillyer et al.
patent: 3551332 (1970-12-01), Baumann et al.
patent: 3907978 (1975-09-01), Spreckelmeyer
patent: 4031193 (1977-06-01), Becher et al.
patent: 4136199 (1979-01-01), Mills
patent: 4171342 (1979-10-01), Hilko et al.

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