Production process of chlorine

Details Production process of chlorine Production process of chlorine

C - Chemistry, Metallurgy

01

B

23/318

C01B 7/04 (2006.01) C01B 7/07 (2006.01)

Patent

CA 1260228

ABSTRACT Chlorine is produced by oxidizing byproduced hydrogen chloride. An offgas containing hydrogen chloride as a byproduct is reacted with oxygen at 300 - 500°C in the presence of a catalyst which contains chromic oxide (Cr2O3) as a principal component. The resulting gas is cooled rapidly and then washed with water to recover vaporized chromium. The hydrogen chloride is then absorbed in water to recover it as an aqueous hydrochloric acid solution. The still remaining portion of the resultant gas is washed with sulfuric acid to remove water from the same, followed by compression and cooling. The resulting liquefied chlorine is separated. The still remaining gas composed principally of oxygen is thereafter returned to the oxidation step.

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