<報文>塩化ランタン-塩酸-酸性有機リン酸化合物系における抽出挙動および分配係数の推定

概要

論文の詳細を見る
Equilibrium data were obtained for the extraction of lanthanum from lanthanum chloride and hydrochloric acid solutions by di-2-ethylhexyl phosphoric acid and 2-ethylhexyl phosphonic acid mono-2-ethylhexyl ester in kerosene, respectively. A method of predicting the distribution coefficients thermodynamically was attempted. A thermodynamic equation for the distribution coefficient was derived by taking the extraction mechanism and lanthanum chloride complexation into account. The apparent equilibrium constant for the extraction reaction was determined from the equilibrium data. The distribution coefficients were predicted only from the initial values of the experimental conditions by using Bromley's equation for estimation of activity coefficients. The distribution coefficients predicted were in good agreement with those obtained experimentally.solvent extractionprediction of distribution coefficientslanthanumdi-2-ethylhexyl phosphoric acid2-ethylhexyl phosphonic acid mono-2-ethylhexyl ester
東北大学の論文
1988-03-25