Purification of the hydrochloric acid in - product of the synthesis of the methane sulfonic acid

摘要

Process for the purification of the hydrochloric acid in - product of the synthesis of the msa, characterized in that the flow of gaseous hydrogen chloride is removed at the head of the synthesis reactor is brought into contact in a column of treatment, to the other hand, - current, with a flow consisting of an aqueous solution of an acid selected from among methane sulfonic acid, hydrochloric acid or a mixture of these 2 acids, at a temperature of between 80 and 130°C. / p