Hydrogen chloride recovery

Details Hydrogen chloride recovery Hydrogen chloride recovery

1976-04-02

1978-09-12

Gantz, Delbert E.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260654A, 260654R, 260659R, 260660, 260662A, 423488, C07C 1700

Patent

active

041137868

ABSTRACT:
Process for recovering hydrogen chloride from a gas withdrawn from an oxychlorination reaction zone which contains hydrogen chloride and water vapor wherein the gas is initially cooled, followed by contacting the gas with a small amount of water to absorb the hydrogen chloride from the gas. The water content is controlled to provide an aqueous hydrogen chloride stream having a hydrogen chloride concentration of from 10% to 20%, with the absorbed aqueous hydrogen chloride being recycled to the oxychlorination reaction. A dilute aqueous hydrogen chloride stream, obtained from another portion of the process, may be employed in the initial cooling step, as a direct quench, resulting in vaporization of the dilute aqueous hydrogen chloride stream and eliminating the necessity for a hydrogen chloride concentrator.

REFERENCES:
patent: 3233978 (1966-02-01), Alkemade
patent: 3453073 (1969-07-01), Sims
patent: 3879481 (1975-04-01), Sze et al.
patent: 3968050 (1976-07-01), Riegel

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