1-苯基-3-甲基-4-丁酰基吡唑酮-5与中性萃取剂协同萃取Yb(Ⅲ)的研究

1-苯基-3-甲基-4-丁酰基吡唑酮-5与中性萃取剂协同萃取Yb(Ⅲ)的研究

SYNERGISTIC EXTRACTION OF Yb(Ⅲ) WITH 1- PHENYL-3-METHYL 4-BUTYRYL-PYRAZOLONE 5 AND DIPHENYL SULFOXIDE, TRIBUTYL PHOSPHATE AND TRIBUTYL PHOSPHINE OXIDE

摘要

摘要: 本文用斜率法和等摩尔系列法研究了1-苯基-3-甲基-4-丁酰基吡唑酮-5(简称PMBuP或HA)单独萃取Yb(Ⅲ),及其与DPSO,TBP和TBPO协同萃取Yb(Ⅲ)的机理。确定了萃合物的组成为Yb·As·HA,Yb·As·DPSO,Yb·As·TBP和Yb·As·TBPO。当强协萃剂TBPO在浓度较高时,有可能生成Yb·As·2TBPO,还测得萃取平衡常数为:1gK_(c(HA))=-2.97,1gK_(C(HA+DPSO))=0.873,1gK_(C(HA+TBP))=0.526,1gK_(C(HA+TBPO))=2.25。PMBuP的萃取能力比PMBP弱很多,但协萃效应强于PMBP。

Abstract: The mechanism of chelate and synergistic extraction of Yb3+ ion with solutions of 1-phenyl-3-methyl-4-butyryl-pyrazrolone-5 (PMBuP or HA)-C6H5CH3,PMBuP-diphenylsulfoxide(DPSO)-C6H5CH3,PMBuP-tributyl phosphate (TBP) -C6H5CH3 and PMBuP-tributyl phosphine oxide (TBPO) -C6H5CH3 were investigated by the slope msthod and the equimolecular system method.The formulas of the extracted species are shown to be Yb-A3·HA, Yb·A3·DPSO, Yb·A3·TBP and Yb·A3·TBPO, When the concentration of TBPO increases, the formula of the extracted species might consist of Yb·A3·2TBPO.The logarithms of the extraction equilibrium constants calculated from the experimental data (25±0.5℃) are as follows.lgKc=-2.97 (Yb3+/HC1O4, NaClO4 (μ=0.1) /HA-C6H5CH3 system) : lgKc=-0.873(Yb3+/HC1O4, NaClO4 (μ = 0.1 ) /HA-DPSO-C6H5CH3 system), lgKc = 0.526 (Yb3+/HClO4, NaClO4 (μ=0.1 ) /HA-TBP-C6H5CH3 system) . lgKc = 2.25 (Yb3+/HC1O4, NaClO4 (μ=0.1) /HA-TBPO-C6H5CH3 system) .The extraction power of PMBuP is smaller than that of PMBP; the syner-gistic effect of PMBuP, however, is slightly higher than that of PMBP.

HTML全文

参考文献(5)

施引文献

资源附件(0)