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The extraction of divalent cobalt, copper, zinc, and cadmium from hydrochloric acid solutions by tri‐n‐octyl phosphine oxide
Author(s) -
Sato Taichi,
Yamatake Masahiro
Publication year - 1972
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.19723910211
Subject(s) - zinc , chemistry , hydrochloric acid , divalent , cobalt , cadmium , inorganic chemistry , copper , aqueous solution , extraction (chemistry) , phosphine oxide , benzene , nuclear chemistry , phosphine , organic chemistry , catalysis
The partitions of divalent cobalt, copper, zinc and cadmium between hydrochloric acid solutions and solutions of tri‐n‐octyl phosphine oxide (TOPO) in benzene or kerosene have been investigated under different conditions. Further the absorption spectra of both the aqueous and organic phases have been examined, and the infra‐red spectra of the organic phases have been studied. As a result, it is found that the order of the extraction efficiency of TOPO for divalent metals is Zn > Cd > Cu > Co at low aqueous acidity; Zn > Cd > Co > Cu at higher acidity. The mechanism of extraction is discussed on the basis of the results obtained.