Process for the production and recovery of halonitroalkanes in high yield
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United States of America Patent
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Jan 19, 1993
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N/A
app pub date -
Jul 7, 1992
filing date -
Jul 7, 1992
priority date (Note) -
Expired
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Abstract
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 halonitroalkane 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 acidification.
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