Process for treating a gas containing a fluorine compound

Details Process for treating a gas containing a fluorine compound Process for treating a gas containing a fluorine compound

1981-11-16

1983-08-16

Thomas, Earl C.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Halogenous component

423489, 423556, B01D 5334

Patent

active

043991130

ABSTRACT:
A process for treating a gas containing a fluorine compound which comprises the steps of contacting said gas with an aqueous solution as an absorbent containing aluminum fluoride and sulfate radical at a concentration of 3 to 30 g/l to absorb the fluorine compound, producing a solid phase including aluminum fluoride hydrate and/or basic aluminum fluoride by adding aluminum hydroxide and/or alumina to the resultant aqueous solution obtained in the absorbing step, and separating said solid phase from a slurry containing said solid phase obtained in the producing step.

REFERENCES:
patent: 4041137 (1977-08-01), Abe et al.
Light Metals 1975, vol. 2, pp. 269-286, "Simple Methods of Crystallizing Fluorides from Effluents of Aluminum Smelter Pot Gas Scrubbers".

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