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本文用单十四烷基磷酸酯(P-538,H_2RPO_4)分别和 PMBP、MiBK、DMSO、TBP、P-204 或 P-507组成的混合萃取剂的氯仿溶液,处理层析纸作为固定相,硫酸溶液用作展开剂,研究对稀土元素的协萃效应及其与非稀土元素的分离,实验表明二元异类协萃体系中,以 PMBP 的协萃效应最为显著,MiBk 和 DMSO 几无协萃效应,而 TBP 对 P-538萃取稀土有反协萃效应。二元同类协萃体系中,P-204的协萃效应较 P-507的好。根据协萃图的最高点提出协萃物的可能组成为 Ln(PMBP)_3·3P-538和 Ln(HRPO_4)_3·3H_2RPO_4·(2-3)P-204。测定了稀土及 UO_2~(2+)、Th~(4+)、Sc~(3+)、Al~(3+)、Fe~(3+)、Cu~(2+)、Hg~(2+)、Pb~(2+)等八种金属离子在0.325 mol/LH_2SO_4溶液中展开时的 R_F 值,除 Fe~(3+)、Al~(3+)外,其它金属离子都能获得良好的分离.
In this paper, we use the tetradecyl phosphate (P-538, H_2RPO_4) and PMBP, MiBK, DMSO, TBP, P-204 or P-507 mixed extractant chloroform solution, the treatment of chromatography paper as the stationary phase, Sulfuric acid solution was used as developing solvent to study the synergistic effect of rare earth elements and their separation from non-rare earth elements. Experiments show that the synergistic effect of PMBP is the most significant in the binary heterogeneous synergistic system. Effect, while TBP has an anti-synergistic effect on the extraction of P-538 rare earth. In the same system, the synergistic effect of P-204 is better than that of P-507. According to the highest point of the map, the possible components of the extract are Ln (PMBP) _3 · 3P-538 and Ln (HRPO_4) _3 · 3H_2RPO_4 · (2-3) P-204. The contents of rare earths and rare earth elements such as UO 2 2+, Th 4+, Sc 3+, Al 3+, Fe 3+, Cu 2 +, Hg 2 +, Pb 2+ and other metal ions in 0.325 mol / LH 2 SO 4 solution, except for Fe 3+ and Al 3+, The separation.