Process for producing calcium fluoborate

Chemistry of inorganic compounds – Boron or compound thereof

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C01B 1124, C01B 3506

Patent

active

041573773

ABSTRACT:
Dry calcium fluoborate suitable for use in the manufacture of boron trifluoride is produced by reacting, in an aqueous medium, calcium fluoride, hydrofluoric acid and boric acid followed by removing water from the calcium fluoborate reaction product by purging the reaction product with a dry inert gas such as nitrogen, at a temperature between about 140.degree. to 160.degree. C.

REFERENCES:
patent: 2135460 (1938-11-01), Loder et al.
patent: 2160576 (1939-05-01), Loder
patent: 2163232 (1939-06-01), Baldeschwieler
patent: 2416133 (1947-02-01), Young et al.
patent: 2697027 (1954-12-01), Swinehart et al.
patent: 2805130 (1957-09-01), Wood
patent: 2889370 (1959-06-01), Schechter
patent: 3018162 (1962-01-01), Halbedel et al.
patent: 3246949 (1966-04-01), Ostwald
Topchiev et al., Boron Trifluoride as Catalysts in Org. Chem. Pergammon Press (1959) pp. 13-24.
Booth, H. S. et al., Boron Trifluoride and its Derivatives; John Wiley & Sons, N.Y. 1949; pp. 87-114.
Paris et al., "Bull. Soc. Chim. Fr." 1954 pp. 142-143.

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