Aqueous pH Values Research Articles

Aqueous phase solubilities and partition data for commercial copper extractants

The aqueous solubilities of purified samples of several commercial metal extractants have been determined, and the influence of the important variables of temperature and aqueous phase pH value on the solubility has been studied. The distribution isotherm between n-heptane and an aqueous phase has been constructed for one of the reagents, and, by use of vapour-phase osmometry data relating to the degree of self-association in the organic phase, the partition coefficient of the monomeric form obtained. The presence of lower-molecular-weight oximes, which are not removed in the purification process, causes considerable experimental difficulty.