Removal of alkyl alkanesulfonate esters from alkanesulfonic...

C - Chemistry – Metallurgy – 07 – C

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C07C 303/44 (2006.01) C07C 309/00 (2006.01)

Patent

CA 2575851

Methods of removing alkyl alkanesulfonate esters from aqueous or anhydrous compositions are provided. The invention provides methods for the conversion of alkyl alkanesulfonate esters of the formula RSO3R~ to the corresponding acids of the formula RSO3H. The alkyl alkanesulfonate esters are present in an organic medium, which may contain significant amounts of water or which may be anhydrous or substantially anhydrous. In some embodiments, the invention provides methods for purifying aqueous or anhydrous alkanesulfonic acids by removing alkyl alkanesulfonate esters.

La présente invention se rapporte à des procédés permettant d'éliminer des esters d'alcanesulfonates d'alkyle de compositions aqueuses ou anhydres. L'invention a trait à des procédés permettant de transformer des esters d'alcanesulfonates d'alkyle représentés par la formule RSO3R' en acides correspondants représentés par la formule RSO3H. Les esters d'alcanesulfonates d'alkyle sont présents dans un milieu organique, lequel peut contenir des quantités importantes d'eau ou peut être anhydres ou sensiblement anhydre. Dans des modes de réalisation, l'invention concerne des procédés permettant de purifier des acides alcanesulfoniques aqueux ou anhydres par l'élimination d'esters d'alcanesulfonates d'alkyle.

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