Regeneration of hydrochloric acid

Details Regeneration of hydrochloric acid Regeneration of hydrochloric acid

1997-07-15

1998-12-08

Nguyen, Ngoc-Yen

Chemistry of inorganic compounds

Halogen or compound thereof

Hydrogen halide

423 83, 423DIG1, 429129, C01B 701

Patent

active

058465103

ABSTRACT:
A process for forming an aqueous chloride leachant from a spent aqueous chloride leach liquor which process comprises passing a spent aqueous chloride leach liquor and gases containing hydrogen chloride through a preconcentrator to form a concentrated aqueous chloride leach liquor by partial evaporation of water therefrom and absorption of hydrogen chloride; withdrawing a portion of the concentrated aqueous chloride leach liquor; roasting the remainder of the concentrated aqueous chloride leach liquor to generate a metal oxide, and gases containing hydrogen chloride; and passing the gases containing hydrogen chloride to the preconcentrator.

REFERENCES:
patent: 3529931 (1970-09-01), Moklebust
patent: 3852430 (1974-12-01), Lienau et al.
patent: 4083693 (1978-04-01), Hansen
patent: 4178176 (1979-12-01), Tolley
Conners, "Hydrochloric Acid Regeneration as Applied to the Steel & Mineral Processing Industries", CIM Bulletin, Feb. 1975, pp. 75-81.

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