Process for producing carboxylic acid chloride

摘要

Disclosed is a process for producing a carboxylic acid chloride by reacting phosgene with a carboxylic acid or an anhydride thereof, which comprises effecting the reaction in the presence of a homopolymer or copolymer of a monomer represented by formula (I) or (II) below, a copolymer of the monomers represented by formulae (I) and (II) below, or a copolymer of at least one monomer selected from the group sensisting of the monomers represented by formulae (I) and (II) below with another monomer copolymerizable therewith: CH2=CHNR1COR2 (I) CH2=CR3CONR4R5 (II). In these formulae R1, R2, and R4 each represents an alkyl group containing from 1 to 3 carbon atoms, or an alkylene group containing from 3 to 5 carbon atoms provided that R1 with R2, and R4 with R5 may each combine to form a ring structure through >N-CO- or >N- in the molecule; R3 and R5 each represents a hydrogen atom or an alkyl group containing from 1 to 3 carbon atoms; and the alkyl groups and alkylene groups may have substituents which are inactive under the polymerization and chlorination reaction conditions.