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-(2-ethylhexyl) ester (HEHEHP) combined with [di-(2-ethylhexyl)-phosphoric acid (HDEHP),isopropylphosphonic acid 1-hexyl-4-ethyloctyl ester (HHEOIPP),bis(2,4,4-trimethylpentyl)-phosphinic acid (Cyanex 272......
液膜法快速稀土二分组的研究马湘江,王向德,万印华,张秀娟摘 要:本文首次报道了用液膜法直接自离子矿的电解质浸渗液进行稀土分组的实验室研究.结果表明,以HDEHP作载体,LMS-2作表面活性剂,盐酸作内水相的液膜体系,对于含3%硫酸铵的离子型稀土矿浸渗液(其中加入适量络合剂X)有良好的分组效果.按最佳操作条件经两级间歇式液膜分组处理,萃余液中重稀土组Sm,Eu,Gd,Tb,Dy,Ho,Er,Tm,Yb,Lu的含量大于99.52%,内水相中Y及轻稀土La,Ce,Pr,Nd的含量大于99.98%,均已达到稀土工厂中用萃取法分组的标准.整个过程仅需30分钟,试剂消耗少,操作费用低,是深度开发离子型稀土矿以及对其它来源的混合稀土稀溶液进行深加工的一项有明显应用前景的新方法.关键词:稀土;二分组;液......
-(2-ethylhexyl) ester (HEHEHP) combined with [di-(2-ethylhexyl)-phosphoric acid (HDEHP),isopropylphosphonic acid 1-hexyl-4-ethyloctyl ester (HHEOIPP),bis(2,4,4-trimethylpentyl)-phosphinic acid (Cyanex 272......
)+3H+,通过对P204以及P204-HCl-HAc体系负载La有机相的红外光谱测试分析,确定了P204-HCl-HAc体系萃取La的机理,发现当pH>1时,萃取过程的实质是La离子与基团P-OH遵循阳离子交换机制发生置换,以及与基团P=O发生的络合配位作用,并求得其萃取平衡常数KLa为1×10-0.02.张茂良等[22]研究了AB类协萃体系(HDEHP+Φ2SO)及ABB类三元体系(HDEHP... of neodymium and carrier-free promethium by the mixture of HDEHP and PC88A[J]. Journal of Radioanalytical and Nuclear Chemistry, 1999, 210(2): 555-560. [20] 常宏涛, 吴文远, 王 丹, 边 雪, 涂赣峰. P204-HCl-H3cit体系中镧铈分配比及分离系......
. Synergistic extraction of neodymium and carrier-free promethium by the mixture of HDEHP and PC88A[J]. Journal of Radioanalytical and Nuclear Chemistry, 1999, 210(2): 555-560. [6] 徐光宪. 稀土(上)[M]. 北京: 冶金工业出版社... of HDEHP and PC88A[J]. J Radioanal Nucl Chem, 1999, 240(2): 555-560. [19] DHAMI P S, CHITNIS R R, GOPALAKRISHNAN V. Studies on the partitioning of actinides from high level waste using a mixture of HDEHP......
-(2-ethyl hexyl phosphonic acid (HDEHP) and bis(2,4,4- trimethypentyl)-mono thiophosphinic acid (Cyanex302) [12-18]. The majority of these extractants are performed on a relatively low acid solution (pH≥1... organophosphorus extractant towards other REEs, the turning point emerges at relatively high acidity, such as the turning point of the extraction of HDEHP towards Y, Er, Yb appearing in 8 mol/L HCl solution [25......
-exchange by the mixture of HDEHP and PC88A [J]. Radioanalytical and Nuclear Chemistry, 1999, 240(2): 555-560. [16] SALEH M I, BARI M F, SAAD B. Solvent extraction of lanthanum from acidic nitrae......
of actinides from high lever waste using a mixture of HDEHP and CMPO as extractant[J]. Sci Tech, 2001, 36(2): 325-335. [17] Jia J T, Wu S, Liao C S, et al. Research and application progress......
, DAS N R. Synergistic extraction of neodymium and carrier-free promethium by the mixture of HDEHP and PC88A[J]. J Radioanal Nucl Chem, 1999, 210(2): 555-560. [26] ZHAO J M, SHEN X Y, DEGN F L, WANG F......