Extraction of platinum metals from hydrochloric acid medium with triphenylphosphine solution in 1,2-dichloroethane.
Extraction of platinum metals with TPP in 1,2-dichloroethane from hydrochloric acid medium has been examined. At hydrochloric acid concentrations higher than 6M, palladium, platinum and osmium are extracted, whereas at low acidity only palladium is quantitatively extracted. Addition of stannous chloride as labilizing agent makes possible a group separation of platinum metals (except osmium). Possible extraction mechanisms are discussed.
Mojski
M
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Department of Analytical Chemistry, Warsaw Technical University, Noakowskiego 3, 00-664 Warsaw, Poland.