Purification of hydrochloric acid obtained as by-product in...

Details Purification of hydrochloric acid obtained as by-product in... Purification of hydrochloric acid obtained as by-product in...

2006-10-31

2006-10-31

Nguyen, Ngoc-Yen (Department: 1754)

Chemistry of inorganic compounds

Halogen or compound thereof

Hydrogen halide

C423S24000R, C423S243010, C423S245100, C562S120000

Reexamination Certificate

active

07128890

ABSTRACT:
Process for purifying the hydrochloric acid obtained as by-product in the synthesis of MSA, characterized in that the gaseous flow of hydrogen chloride evacuated from the top of the synthesis reactor is placed in contact in a treatment column, counter-currentwise, with a flow consisting of an aqueous solution of an acid chosen from methanesulfonic acid, hydrochloric acid or a mixture of these two acids, at a temperature of between 80 and 130° C.

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