Processes for the production of methyl dithiocarbazinate

Details Processes for the production of methyl dithiocarbazinate Processes for the production of methyl dithiocarbazinate

C - Chemistry, Metallurgy

07

C

C07C 337/02 (2006.01)

Patent

CA 2425014

A process for the production of methyl dithiocarbazinate includes the steps of providing a mixture comprising hydrazine, solvent, carbon disulfide and base; adding methyl bromide to the mixture; cooling the reaction mixture; and recovering methyl dithiocarbazinate. The methyl dithiocarbazinate may be recovered by filtering the reaction mixture to yield a solid methyl dithiocarbazinate retentate and a liquid filtrate; acidifying the filterate with a mineral acid; and adding methyl isobutylketone to the acidified filterate.

L'invention concerne une méthode de production de dithiocarbazinate de méthyle qui comprend les étapes suivantes : utiliser un mélange composé d'hydrazine, de solvant, de disulfure de carbone et d'une base; ajouter du bromométhane au mélange; refroidir le mélange réactif; et récupérer le dithiocarbazinate de méthyle. Le dithiocarbazinate de méthyle peut être récupéré en filtrant le mélange réactif pour obtenir un rétentat solide de dithiocarbazinate méthyle et un filtrat liquide; acidifier le filtrat avec un acide minéral et ajouter de la méthyl isobutyl cétone au filtrat acidifié.

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