| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method which can reduce a load on production facility due to acidic gas generated during reaction and can shorten reaction time in the production process of a carboxylic acid halide, and further can alleviate bad actions on following processes after the reaction; and to provide a method for effectively control side effects due to hydrogen chloride. <P>SOLUTION: This method for producing the carboxylic acid halide comprises reacting a carboxylic acid with at least one halogenating agent selected from the group consisting of thionyl chloride, oxalyl chloride and phosgene, where the carboxylic acid is reacted with the halogenating agent in the presence of an amide compound (A) to generate the carboxylic acid halide, then the reactant separates into two phases of a phase (T) [mainly including the intended carboxylic acid halide] and a phase (W) [mainly including the acidic component generated from the halogenating agent and the amide compound (A)], and the target is obtained by removing the phase (W). <P>COPYRIGHT: (C)2013,JPO&INPIT |
