论文部分内容阅读
许多磷酸酯、膦酸酯、亚膦酸酯和膦氧化物已被证明是铀的高效萃取剂,其中TBP和D2EHPA等已在实际中获得广泛的应用,为了寻求萃取性能更好的萃取剂,目前对于其它的各种有机磷化合物也进行了广泛的研究。由于大多数体系是在硝酸介质中进行的,因此某些磷有机化合物对于硝酸的萃取也有了若干报导,本文用报告提出的对应溶液法对于膦酸氢二丁酯(Dibutyl hydrogen phosphonate)HP(0)(OC_4H_9)_2,萃取硝酸的行为进行了研究,并发现了一些新的情况,卽当用膦酸氢二丁酯作为萃取剂时,硝酸的平均络合数不仅是水相硝酸浓度的函数,而且是萃取剂浓度的函数,这一结果表明必须考虑HNO_3·(?)S型的络合物的存在,这在前人的文献中尚无报导。
Many phosphates, phosphonates, phosphonates and phosphine oxides have been proved to be efficient uranium extraction solvents. Among them, TBP and D2EHPA have been widely used in practice. In order to find extractants with better extraction performance, Various other organophosphorus compounds have also been studied extensively. Since most of the systems are carried out in nitric acid medium, some phosphorus organic compounds have also reported on the extraction of nitric acid. In this paper, the corresponding solution method reported in this report is applied to the preparation of Dibutyl hydrogen phosphonate HP (0 ) (OC_4H_9) _2, extraction of nitric acid was studied and some new cases were found. When using dibenzyl hydrogen phosphonate as extractant, the average complexation number of nitric acid is not only a function of the concentration of nitric acid in aqueous phase , But also a function of the concentration of the extractant. This result indicates that the presence of the complex of type HNO 3 · (?) S must be considered, which has not been reported in previous literature.