【摘要】 本文比较了1-苯基,3-甲基,4-三氟乙酰吡唑酮（5）（代号为HAPZ-8113F,以HA表示）与多种多碳亚砜和双亚砜（以S表示）对于三价铈的协同萃取效应,以二辛基亚砜的协萃能力为最高。并进一步研究了以二辛基亚砜为中性萃取剂,在硝酸和盐酸体系申,和HAPZ-8113F协同萃取Ce（Ⅲ）时的混合萃合物组成。它们分别是:CeAs和CeA₃·NO₃·S以及CeA₂·Cl·HA和CeA₃·Cl·S。从归一化标绘图中推算了各有关的平衡常数。还制得了HAPZ-8113F与钕的固体萃合物及HAPZ-8113F、二甲基亚砜与钕的固体协车合物。它们的组成分别为NdA₃·HA和NdA₃·S。更多还原

【Abstract】 Among the various acyl groups substituted 1-phenyl, 3-methyl, pyrazolones for the extraction of cerium(Ⅲ), it has been found previously that 4-trifluoroacetyl substituted compound, abbreviated as HAPZ-8113F and denoted as HA in this paper, is most efficient. Combined use of certain sulfoxides can further bring up the extraction coefficient. The order of synergistic effect is as follows:TOPO>DOSO>DNpSO≈1,3-DφDSO>l,-2-DφDSO.Through the use of method of normalization in curve plotting, the extracted species in nitric acid medium 13 estimated as a mixtuer of CeA3 and CeA3NO3·S, while in hydrochloric acid medium, it behaves as a mixture of CeA2Cl·HA and CeA3Cl·S. The Synergistic extraction equilibrium coefficients are calculated to be 1gK21= 3034 in HNO3 medium and 1gK21 = 2.86 in HC1 medium respectively, S being di-n-octyl sulfoxide (DOSO) in all cases above,As a comparison, NdA3·HA and NdA3·S have been isotated,S being (CH3)2SO. The corresponding Ce (Ⅲ) compounds are unstable in air, revealed by change of color from light yellow to dark yellow on standing.更多还原