Process for preparing calcium fluoride from hexafluoro silicic a

Details Process for preparing calcium fluoride from hexafluoro silicic a Process for preparing calcium fluoride from hexafluoro silicic a

1975-02-14

1977-06-21

Stern, Edward

Chemistry of inorganic compounds

Halogen or compound thereof

Binary fluorine containing compound

423335, 423438, C01F 1122, C01B 3314

Patent

active

040311937

ABSTRACT:
Disclosed is a process for the preparation of calcium fluoride comprising reacting hexafluoro silicic acid with calcium carbonate in the presence of sulfate or aluminum ions within a pH range of between about 2 and 6 and separating the calcium fluoride precipitate from the resulting aqueous silica sol.

REFERENCES:
patent: 2410043 (1946-10-01), Breton et al.
patent: 2914474 (1959-11-01), Hillyer et al.
patent: 3551332 (1970-12-01), Baumann et al.

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