Process for purifying an alkanesulfonyl chloride and the...

Details Process for purifying an alkanesulfonyl chloride and the... Process for purifying an alkanesulfonyl chloride and the...

C - Chemistry, Metallurgy

07

C

C07C 309/80 (2006.01) C07C 303/02 (2006.01) C07C 303/22 (2006.01) C07C 303/44 (2006.01) C07C 309/04 (2006.01)

Patent

CA 2202396

This process for purifying an alkanesulfonyl chloride (CAS) to decrease its sulfate content involves washing the alkanesulfonyl chloride in water or an aqueous solution of an acid with a pH of -0.57 to 7, then separating the purified alkanesulfonyl chloride from the aqueous phase. The purified CAS thus obtained results, through total hydrolysis, in alkanesulfonic acid with a low sulphuric acid content.

Ce procédé de purification d'un chlorure d'alcane-sulfonyle (CAS) pour en diminuer la teneur en sulfates consiste à laver le chlorure d'alcanesulfonyle par de l'eau ou par une solution aqueuse d'un acide ayant un pH compris entre -0,57 et 7, puis à séparer ensuite le chlorure d'alcanesulfonyle ainsi purifié de la phase aqueuse. Le CAS purifié ainsi obtenu conduit par hydrolyse totale à de l'acide alcanesulfonique à faible teneur en acide sulfurique.

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