Production of hydrochloric acid by removing hydrogen chloride fr

Details Production of hydrochloric acid by removing hydrogen chloride fr Production of hydrochloric acid by removing hydrogen chloride fr

1977-07-29

1978-09-19

Thomas, Earl C.

Chemistry of inorganic compounds

Halogen or compound thereof

Hydrogen halide

423240, 423241, 423481, C01B 708

Patent

active

041155319

ABSTRACT:
Hydrochloric acid having a substantially constant HCl content of 20 to 36% is produced continuously by removing hydrogen chloride from hot combustion gas. To this end, hot combustion gas containing 1 to 10% by volume of HCl and steam, this gas being obtained by the joint combustion of off-gases containing chlorinated hydrocarbons and liquid residues of chlorinated hydrocarbons, is introduced into a quenching zone, and quenched therein, down to a temperature lower than its dew point, by means of cooled hydrochloric acid containing hydrogen chloride in a concentration of 20 to 36%, which concentration corresponds to the concentration of the hydrochloric acid which is to be produced. The resulting gas-liquid mixture is separated in an absorption cooling zone into cooled hydrochloric acid and cooled combustion gas containing 0.1 to 1% by volume of HCl. The cooled hydrochloric acid is introduced into a reservoir zone capable of receiving a multiple of the quantity of hydrochloric acid produced per hour, and recycled from the said reservoir zone to the quenching zone. Additional 20 to 36% hydrochloric acid produced is taken out of the quenching cycle.

REFERENCES:
patent: 2950170 (1960-08-01), Harnisch et al.
patent: 3140155 (1964-07-01), Cull et al.
patent: 3387430 (1968-06-01), Savardi, Jr.
patent: 3666424 (1972-05-01), Cox
patent: 3826816 (1974-07-01), McCormick
patent: 3980758 (1976-09-01), Krumbock et al.
patent: 4018879 (1977-04-01), Winnen

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