<報文>D2EHPAおよびM2EHPAによるコバルトの溶媒抽出に及ぼす陰イオンの影響

概要

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The effect of anions and ionic strength on solvent extraction of cobalt with D2EHPA and M2EHPA was examined. The organic solvents were made up partly of sodium salt and dissolved into kerosene. The ionic strength was changed from 0.05 to 4.0 by an addition of sodium nitrate, sodium chloride, sodium sulfate or sodium perchlorate. With an increase in ionic strength, equilibrium extraction curves were shifted to a lower pH in perchlorate, nitrate and chloride solutions, but in sulfate solution extraction curves were shifted to a higher pH. At a constant ionic strength the extraction curves were arranged to a higher pH in the order of ClO_4^-, NO_3^-, Cl^- and SO_4^<2->. For the solvent extraction of cobalt in acidic solutions M2EHPA is much better as an extractant than D2EHPA.solvent extractioncobaltD2EHPAM2EHPA
東北大学の論文
1985-09-30