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首页> 外文期刊>Separation and Purification Technology >Solvent extraction of lanthanum(III),europium(III)and lutetium(III)by bis(4-acyl-5-hydroxypyrazoles)derivatives
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Solvent extraction of lanthanum(III),europium(III)and lutetium(III)by bis(4-acyl-5-hydroxypyrazoles)derivatives

机译：双（4-酰基-5-羟基吡唑）衍生物的溶剂萃取镧（III），eur（III）和lut（III）

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The liquid-liquid extraction of some trivalent rare earths Ln(III)(Ln:La,Eu,Lu),performed from 0.1 M NaNO_3 aqueous solutions by two bis(4-acyl-5-hydroxypyrazoles),1,12-bis(l'-phenyl-3'-methyl-5'-hydroxy-4'-pyrazolyl)-dodecane-1,12-dione(HL-10-LH)and 1,6-bis(l'-phenyl-3'-methyl-5'-hydroxy-4'-pyrazolyl)-hexane-l,6-dione(HL-4-LH),in chloroform,has been studied.The processes of extraction have been deter-mined by the slope analysis method and by analyzing a function that allows the simultaneous treatment of all the experimental points obtained in different conditions.With HL- 10-LH,the stoichiometrics of the extracted species differ for the three lanthanides.The ligands are biscoordinated and tetracoordinated in the extracted complexes of lanthanum and europium,La_2(L-10-L)_2(L-10-LH)_2 and Eu_n(L-10-L)_N(L-10-LH)_n(n = 1,2).They are exclusively biscoordinated in the complex of lutetium,Lu(L-10-LH)_3.The complex of europium extracted by HL-4-LH at weak extraction yields,Eu(L-4-L)(L-4-LH),and the corresponding extraction constant are comparable to the ones obtained for HL-10-LH,whereas polynuclear species are extracted at high extraction yields.The extraction efficiency with HL- 10-LH increases with the ascending atomic number of Ln(La < Eu < Lu).A comparison between HL-10-LH and HPMBP(l-phenyl-3-rnefhyl-4-benzoyl-5-hydroxy-pyrazole)for the same concentration of complexation sites shows that the extraction by HL-10-LH is more effective.Moreover,a better selectivity of extraction was obtained with HL-10-LH.
机译：通过两个双（4-酰基-5-羟基吡唑），1,12-双（0.1N NaNO_3水溶液）对一些三价稀土Ln（III）（Ln：La，Eu，Lu）进行液-液萃取l'-苯基-3'-甲基-5'-羟基-4'-吡唑基）-十二烷-1,12-二酮（HL-10-LH）和1,6-双（l'-苯基-3'-对氯仿中的甲基5'-羟基-4'-吡唑基）-己烷-1,6-二酮（HL-4-LH）进行了研究。斜率分析法确定了提取工艺，通过分析允许同时处理在不同条件下获得的所有实验点的函数。使用HL-10-LH，三种镧系元素的萃取物的化学计量比不同。镧系元素的萃取物中配体是双配位和四配位的和euro，La_2（L-10-L）_2（L-10-LH）_2和Eu_n（L-10-L）_N（L-10-LH）_n（n = 1,2）。它们都是双配位的在-4-的络合物Lu（L-10-LH）_3中相应的提取常数与HL-10-LH的提取常数相当，而多核物质的提取率很高.HL-10-LH的提取效率随Ln（La

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