Process for the continuous recovery of hydrogen fluoride gas

Details Process for the continuous recovery of hydrogen fluoride gas Process for the continuous recovery of hydrogen fluoride gas

1989-07-07

1991-07-16

Lewis, Michael L.

Chemistry of inorganic compounds

Halogen or compound thereof

Hydrogen halide

423488, C01B 719

Patent

active

050323717

ABSTRACT:
A continuous process for the recovery of anhydrous hydrogen fluoride gas by contacting an aqueous solution of an alkali metal fluoride in hydrofluoric acid with a sulfur-containing dehydrating stream. The dehydrating stream preferably consists of sulfur trioxide dissolved in sulfuric acid. The desired product is obtained in high yield and purity.

REFERENCES:
patent: 2939766 (1960-06-01), Churchill
patent: 4120939 (1978-10-01), Ehlig

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