Back to results
US 7,128,890 B2Granted
Purification of hydrochloric acid obtained as by-product in the synthesis of methanesulfonic acid
AssigneeArkema France
InventorJean Ollivier
Life of this patent
Estimating the term…
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.
Claims4
A process for purifying hydrogen chloride obtained as by-product in the synthesis of methanesulfonic acid comprising:
- passing a gaseous flow of hydrogen chloride obtained from a methanesulfonic acid synthesis reactor through a treatment column, in counter-current mode, with a flow of an aqueous solution of an acid selected from the group consisting of methanesulfonic acid, hydrochloric acid and a mixture thereof, at a temperature of between 80 to 130° C. to remove methanesulfonic chloride from the hydrogen chloride flow.
Dependencies are inferred from the claim text.