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化学学报
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化学学报 ›› 1964, Vol. 30 ›› Issue (5): 478-487. 上一篇    下一篇

论文

以苯甲酸正丁醇溶液萃取高氯酸氧鈾

鄭威, 吳瑾光, 徐光憲   

  1. 北京大学
  • 投稿日期:1963-11-25 发布日期:2013-06-03

STUDIES ON ORGANOPHOSPHORUS COMPOUNDS Ⅱ. SEPARATION OF ALKYLPHOSPHORIC ACIDS BY PAPER CHROMATOGRAPHY AND PAPER ELECTROPHORESIS

CHENG WEI, WU CHIN-KWANG, HSU KWANG-HSIEN   

  1. Peking University
  • Received:1963-11-25 Published:2013-06-03

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本文研究苯甲酸的正丁醇溶液对高氯酸氧铀的萃取,测得苯甲酸在正丁醇和水相间的平衡常数(A=58),苯甲酸在鲍和正丁醇的水溶液中的电离常数(Ka=6.2×10-5)和萃取反应的平衡常数(K=6.4×10-5)。研究结果证明在水相中除UO22+外,倚有UO2A+,UO2A2,UO2(OH)+和UO2(OH)A共四种格合物(A-表示苯甲酸根),其稳定常数经测定分别为:β10=8.0×102,β20=1.8×105,β01=2.0×109,β11=5.2×1012。以上常数除Kα及β01与文献值一致外,其余似尚无报告。交中提出一种较简便而较严谨的用萃取法测定混合型络合物的稳定常数的数据处理法。

A convenient but rigorous method for evaluating the stability constants of complexes of the mixed-ligand type has been proposed and applied to the determination of the stability constants βij of UO2Ai(OH)i from distribution data. It is found that in the pH range studied there exist five uranyl species in aqueous phase, namely, UO22+, UO2A+, UO2A2, UO2(OH)+, and UO2(OH)A, where A-represents the benzoate ion, with the following stability constants.