Production of phosphorus-containing esters

Details Production of phosphorus-containing esters Production of phosphorus-containing esters

C - Chemistry, Metallurgy

07

F

260/462, 260/458

C07F 9/48 (2006.01) C07F 9/142 (2006.01) C07F 9/32 (2006.01) C07F 9/40 (2006.01)

Patent

CA 1050562

ABSTRACT OF THE DISCLOSURE Production of phosphorus-containing esters of the general formula Image in which X stands for an alkyl group having from 1 to 3 carbon atoms, an aryl group or an alkoxy group having from 3 to 6 carbon atoms, Y stands for an alkoxy group having from 3 to 5 carbon atoms, and Z stands for a hydrogen atom, an alkyl group having from 1 to 3 carbon atoms or an aryl group by reacting phosphohalogen compounds of the general formula Image in which A and B each stand independently of one another, for a chlorine or bromine atom, an alkyl group having from 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 3 to 6 carbon atoms. The phosphorus-containing esters are made by mixing and thereby reacting in an unheated reaction zone in liquid phase the phosphohalogen compound with the aliphatic alcohol and delivering the resulting reaction mixture to the head of a steam-heated packed column; feeding the column's base portion with inert gas travelling upwardly therein countercurrently with respect to the reaction mixture; distilling off overhead hydrogen halide, alcohol in excess and, alkyl halide, if any, together with the inert gas; partially condensing and removing the distilled matter; and removing resulting phosphorus- containing ester flowing downwardly in the column from the column head to the column base, from the column base portion, if ?sired in admixture with alcohol in excess.

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