Method for preparing disodium 2.2'-dithiobis(ethanesulphonate)

Details Method for preparing disodium 2.2'-dithiobis(ethanesulphonate) Method for preparing disodium 2.2'-dithiobis(ethanesulphonate)

C - Chemistry, Metallurgy

07

C

C07C 319/24 (2006.01) C07C 319/02 (2006.01) C07C 323/66 (2006.01)

Patent

CA 2416007

The invention concerns a novel method for industrial preparation of disodium 2,2'-dithiobis(alkylsulphonates), and in particular disodium 2,2'-dithiobis(ethanesulphate) (dimesna). Said novel method is summarised by the reaction diagram (A). In diagram (A), Hal represents a halogen atom, and preferably a bromine atom; M represents a sodium or potassium atom; and n represents an integer ranging between 0 and 2.

La présente invention concerne un nouveau procédé de préparation industrielle de 2,2'-dithiobis(alkylsulfonates) de disodium, et en particulier du 2,2'-dithiobis(éthanesulfonate) de disodium (dimesna). Ce nouveau procédé est résumé dans le schéma réactionnel (A). Dans le schéma (A), Hal représente un atome halogène, et de préférence un atome de brome, M représente un atome de sodium ou de potassium et n représente un entier de 0 à 2.

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