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作 者:谢新辉[1] 张天发[1] 张红[1] 刘松愈[1]
机构地区:[1]云南大学化学系
出 处:《化工冶金》1998年第1期6-10,共5页
摘 要:研究了1-苯基-3-甲基-4-(α-呋喃甲酰基)-5-吡唑酮(HPMFP,HA)与氧化三正辛基膦(TOPO,B)或氧化三苯基膦(TPPO,B)的甲苯溶液从硝酸介质中对钍(IV)的协同萃取行为.用斜率法确定了HA-TPPO-C6H5CH3体系萃取钍(IV)的协萃配合物组成为ThA4·TP-PO,求得了体系的协萃平衡常数。The synergistic extraction of Th(Ⅳ) from nitrate medium with 1phenyl3methyl4(αfuroyl)5pyrazolone (HPMFP, HA) and trioctylphosphine oxide (TOPO, B) or triphenylphosphine oxide (TPPO, B) in toluene has been studied at (25±0.5)℃. The experiment shows that the ability to extract Th(Ⅳ) using HA and TOPO in toluene is so strong that the appropriate acidic range does not exist for studying the composition of the synergistic extracted species. In HATPPOC6H5CH3 system, by using the slope method, the composition of the synergistic extracted species is shown to be ThA4·TPPO and its synergistic extraction equilibrium constant (lgKs.e) is calculated to be 11.52±0.08. A possible structure of the synergistic extracted species is proposed. Moreover, the extraction ability for Th(IV) with HA and TPPO is also compared among various solvents.
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