Process for production of organic disulfides

C - Chemistry – Metallurgy – 07 – C

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C07C 319/24 (2006.01) C07C 321/14 (2006.01)

Patent

CA 2320937

An aqueous solution of basic mercaptide salt and water-soluble peroxide are mixed together in a reaction zone and maintained under reaction conditions effective to produce a vapor phase comprising organic disulfide, and concurrently vapor phase is recovered from the reaction zone. The process is highly efficient and enables production of organic disulfides in high yield and purity. Not only is the process very easy and simple to carry out, but in addition the process (i) eliminates the need for forming an organic phase of liquid organic disulfide product and conducting a separation between such product and the total aqueous phase used in the reaction, (ii) enables efficient control of a highly exothermic reaction, and (iii) minimizes alkanesulfonic acid salt formation during the reaction.

On mélange une solution aqueuse de sel de mercaptide de base et un peroxyde soluble dans l'eau dans une zone de réaction et on les maintient dans des conditions de réaction effectives pour produire une phase vapeur comprenant un bisulfure organique, la phase vapeur étant simultanément récupérée dans la zone de réaction. Le procédé est d'une grande efficacité et permet de produire des bisulfures organiques à rendement et pureté élevés. Le procédé est non seulement très simple et facile à réaliser, mais en outre, il permet: (i) d'éliminer la nécessité de former une phase organique de produit bisulfure liquide et d'effectuer une séparation de ce produit avec la phase aqueuse totale dans la réaction, (ii) d'effectuer une régulation efficace d'une réaction hautement exothermique, et (iii) de réduire la formation de sel d'acide alcanesulfonique pendant la réaction.

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