THE INFLUENCE OF SOLVENT ON THE EXTRACTION OF SOME NON-FERROUS METALS BY ALIPHATIC NON-CHELATING ALDOXIMES

ABSTRACT The influence of different solvents on the extraction ability of aliphatic non - chelating aldoximes with respect to CuCl2, NiCl2 and CoCl2 has been investigated with heptanaloxime as an example. The effect of carbon tetrachloride, toluene, chloroform, 1,2-dichloroethane, caprylic acid on syn-antiisomerization and aggregation of heptanaloxime has been studied and the constants of these processes have been calculated. It has been shown also it was aldoxime anti - isomer that formed the extracted complex with metals. The equation of state of non-chelating aldoximes in the extraction systems has been deduced. Taking into account the processes which occur in the organic and aqueous phases, the effective extraction constants have been computed for extraction of metals from hydrochloric acid solutions by heptanaloxime in the different solvents. Their values were found to decrease in the order: CCl4 > toluene chloroform > 1,2-dichloroethane. For chlorine substituted hydrocarbons the correlations between...