EXTRACTION OF INDIUM(III) FROM CHLORIDE AND NITRATE MEDIA WITH 3-PHENYL-4-BENZOYLISOXAZOL-5-ONE, HPBI, AND TRI-N-OCTYLPHOSPHINE OXIDE

The extraction processes of indium(III) from media of various complexi ng ability, chloride and nitrate, in toluene or chloroform. have been elucidated. Indium is extracted from 1 M nitrate medium as In(PBI), wi th HPBI alone and as In(PBI)(3)(TOPO)(2) with TOPO-HPBI mixtures, whil e it is extracted from 1 M chloride medium as In(PBI)(3) and InCl4(PBI )(3-x)(TOPO)(2). The complexation of In in the aqueous phases, the ext raction of nitric acid and various solute-solute and solute-diluent in teractions in the organic phases must be taken into account ill the pr ocesses. The results me compared with those obtained previously with 1 -phenyl-3-methyl-4-benzoyl-pyrazol-5-one under the same conditions.