{"title":"The Chemistry of Protactinium. VI : A Study of the Sulfato-Complex of Pa(IV) by Means of TTA-Benzene Extraction","authors":"T. Mitsuji","doi":"10.1246/BCSJ.41.115","DOIUrl":null,"url":null,"abstract":"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).","PeriodicalId":21586,"journal":{"name":"Science reports of the Research Institutes, Tohoku University. Ser. A, Physics, chemistry and metallurgy","volume":"43 1","pages":"129"},"PeriodicalIF":0.0000,"publicationDate":"1968-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"4","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Science reports of the Research Institutes, Tohoku University. Ser. A, Physics, chemistry and metallurgy","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1246/BCSJ.41.115","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 4
Abstract
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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