镤的化学性质。Pa(IV)磺化配合物的tta -苯萃取研究

Science reports of the Research Institutes, Tohoku University. Ser. A, Physics, chemistry and metallurgy Pub Date : 1968-01-01 DOI:10.1246/BCSJ.41.115

T. Mitsuji

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引用次数: 4

摘要

研究了Pa (IV)在高氯酸盐、氯化物和硫酸盐溶液(pH 0.4-1.1)中的萃取行为。在高氯酸盐和氯化物溶液中，萃取平衡可以写为:Pa(OH)_2^2++4HT\ightleftharpoonsPaT_4+2H_2O+2H^+。而在硫酸盐溶液中，TTA萃取平衡可以写为:Pa(SO_4)(OH)^++4HT\ightleftharpoonsPaT_4+HSO_4^-+H_2O+2H^+。在离子强度为0.50(温度:10±0.5°C)时，上述反应的平衡常数为320。

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The Chemistry of Protactinium. VI : A Study of the Sulfato-Complex of Pa(IV) by Means of TTA-Benzene Extraction

The behavior of Pa (IV) during extraction with TTA was investigated in perchlorate, chloride, and sulfate solutions (pH 0.4–1.1). In perchlorate and chloride solutions, the extraction equilibrium may be written as:Pa(OH)_2^2++4HT\ightleftharpoonsPaT_4+2H_2O+2H^+On the other hand, the extraction by TTA from the sulfate solution may be described as:Pa(SO_4)(OH)^++4HT\ightleftharpoonsPaT_4+HSO_4^-+H_2O+2H^+Therefore, the formation of the sulfato-complex of Pa(IV) is considered to occur as follows:Pa(OH)_2^2++HSO_4^-\ightleftharpoonsPa(SO_4)(OH)^++H_2OThe equilibrium constant for the above reaction has been determined to be 320 at the ionic strength of 0.50 (temperature: 10±0.5°C).

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Science reports of the Research Institutes, Tohoku University. Ser. A, Physics, chemistry and metallurgy

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