Behavior of Dialkyl Phosphorodithioic Acids in Liquid Extraction Systems

Abstract

The solubility and acidity of the diethyl, dilsopropyl, di-n-butyl, and dilsobutyl esters of phosphorodithioic acid in water and the distribution of each between CCI4, methyl isobutyl ketone, or n-amyl acetate and HCl-NaCl solutions have been studied.From the data, the acid dissociation constants and the partition coefficients were calculated. No evidence was found for dimerization of dialkyl phosphorodithioic acids in the organic phase. These constants are discussed,together with data for the dialkyl phosphates. The acid dissociation constant is somewhat iarger and the partition coefficient is much iarger when comparing di-n-butyl phosphorodithioic acid with di-n-butyl phosphate.