Production of hydrogen fluoride

Details Production of hydrogen fluoride Production of hydrogen fluoride

1973-08-20

1977-11-01

Stern, Edward

Chemistry of inorganic compounds

Halogen or compound thereof

Hydrogen halide

423472, 423490, C01B 722, C01D 302

Patent

active

040566048

ABSTRACT:
Hydrogen fluoride is recovered from hydrofluosilicic acid by-product of phosphoric acid manufacture. The hydrofluosilicic acid effluent is reacted with ammonia to form ammonium fluoride which is converted to a bifluoride by reaction with an excess of soluble metal fluoride. The bifluoride is readily recoverable and decomposable to yield hydrogen fluoride.

REFERENCES:
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patent: 3101254 (1963-08-01), Cunningham
patent: 3128152 (1964-04-01), Secord et al.
patent: 3140152 (1964-07-01), Rucker et al.
patent: 3195979 (1965-07-01), Burkert et al.
patent: 3323861 (1967-06-01), Toyabe et al.
patent: 3501268 (1970-03-01), Laran et al.
patent: 3551098 (1970-12-01), Flemmert
patent: 3743704 (1973-07-01), West

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