Process for the production and recovery of halonitroalkanes...

Details Process for the production and recovery of halonitroalkanes... Process for the production and recovery of halonitroalkanes...

C - Chemistry, Metallurgy

07

C

C07C 205/08 (2006.01) C07C 201/12 (2006.01) C07C 201/16 (2006.01)

Patent

CA 2139753

A process for the preparation of halonitroalkanes, e.g. bromonitromethane, is disclosed in which a nitroalkane is reacted with an alkali metal base or an alkaline earth metal base, and the resulting nitroalkane salt is halogenated to form the halonitroal- kane in a reaction mixture. The process is improved by acidifying the reaction mixture, preferably to pH = 0-4, and thereafter recovering the halonitroalkane by azeotropic distillation of the reaction mixture. The acidification step increases the amount of halonitroalkane recovered, as compared to prior art processes in which the reaction mixture is distilled without prior acidifica- tion.

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