Sulfation process

C - Chemistry – Metallurgy – 07 – C

Patent

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Details

C07C 303/24 (2006.01) C07C 305/06 (2006.01)

Patent

CA 2416882

The present invention relates to a sulfation process comprising the steps of: a) reacting a tertiary amine with a sulfation precursor having the formula (I) wherein R1 is C1-C22 alkyl, C7-C22 alkylenearyl, and mixtures thereof; to form an admixture comprising a quaternized amine and a sulfating species; and b) reacting a hydroxyl species with said admixture to form a sulfated hydroxyl species. The process of the present invention is adaptable to sulfating a wide range of alcohols including the hydroxyl unit which terminates a polyalkoxylate moiety which are prevalent in the area of surfactants, inter alia, alkyl ethoxy sulfates.

La présente invention concerne un procédé de sulfatation se décomposant en plusieurs opérations. On commence a) par faire réagir un amine tertiaire avec un précurseur de fulfatation repésenté par la formula (I) dans laquelle R?1¿ est C¿1?-C¿22? alkyle, C¿7?-C¿22? alkylène-aryle, et certains de leurs mélanges de façon à former un adjuvant comprenant un amine quaternairisé et une espèce sulfatante. Il ne reste plus b) qu'à faire réagir une espèce hydroxyle avec ledit adjuvant de façon à former une espèce hydroxyle sulfatée. Le procédé de l'invention convient à la sulfatation d'une vaste gamme d'alcools incluant l'unité hydroxyle en terminaison d'un fragment polyalcoxylate, comme cela est fréquent dans le domaine des tensioactifs tels que les alkyle-éthoxy sulfates.

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