PRODUCTION OF PHOSPHORUS-CONTAINING ESTERS

摘要

PRODUCTION OF PHOSPHORUS-CONTAINING ESTERS Production of phosphorus-containing esters of the general formula: in which X stands for an alkyl group having from 1 to 3 carbon atoms, an aryl group or an alkoxy group having from 1 to 6 carbon atoms, Y stands for an alkoxy group having from 1 to 6 carbon atoms, and Z stands for a hydrogen atom, an alkyl group having from 1 to 3 carbon atoms, an aryl group or an alkoxy group having from 1 to 6 carbon atoms. The esters are produced by reacting one or more phosphorus halides of the general formula: in which A and B stand independently from one another, for a chlorine or bromine atom, an alkyl group havingfrom 1 to 3 carbon atoms or an aryl group, C stands for a chlorine or bromine atom and D stands for a free pair of electrons or an oxygen atom, with aliphatic alcohols having from 1 to 6 carbon atoms. More particularly the phosphorus halide(s) and the aliphatic alcohol are heated to boiling in a reaction zone, at temperatures within the range 50 and 200.degree.C, the resulting hydrogen halide and alcohol in excess are passed to the upper portion of the reaction zone, condensed therein and removed therefrom; and resulting phosphorus-containing ester is delivered, if desired with an excess of aliphatic alcohol, to the lower portion of the reaction zone and removed therefrom.