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化学学报
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化学学报 ›› 1989, Vol. 47 ›› Issue (1): 67-70. 上一篇    下一篇

研究论文

2-乙基己基膦酸单(2-乙基己基)酯对两价金属离子的萃取平衡

黄可龙;舒万艮;张祥麟   

  1. 中南工业大学化学系
  • 发布日期:1989-01-15

Extraction equilibria of divalent metal ions by mono (2-ethylhexyl)-2-ethylhexylphosphate

HUANG KELONG;SHU WANGEN;ZHANG XIANGLIN   

  • Published:1989-01-15

PDF

549

被引次数

20 | 5

本文报导用2-乙基己基膦酸单(2-乙基己基)酯在煤油溶剂中萃取Sn(II),Pb(II), Zn(II)和Cd(II)等的平衡, 应用斜率法研究了萃取平衡; 合成了与Zn(II)和Pb(II)固体萃合物, 在元素分析和有关离子分析的基础上结合最小二乘法线性回归探讨了萃取机理及有关萃合物组成; 考察了在加入三辛基氧化膦(TOPO)时, 2,乙基己基膦酸单(2-乙基己基)酯对金属离子萃取性能的影响.

关键词: 锌, 萃取剂, 镉, 溶剂萃取, 铅, 锡, 萃取平衡, 最小二乘法, 磷酸单(乙基己基)酯

The extration of Sn(II), Pb(II), Zn(II) and Cd(II) from aqueous solution containing HCl or HNO3 by the title extractant (I, HA) in kerosine was investigated at 20 ?1? Under these conditions, I is an efficient extractant for the extration of Sn(II). The extractability by I in kerosine decreases in the order Sn(II) ?Zn(II) > Pb(II) > Cd(II). With HA denoting the monomeric mol. of the extractant, the compns. of the extracted species in kerosine are SnA2?HA, PbA2?HA, PbA2?HA, ZnA2譎A, ZnA2?HA and CdA2?HA resp. The extration distribution ratio of Zn, Cd and Pb with a mixture of I and TOPO in kerosine decreased slightly, showed the absence of the synergistic effect of TOPO.

Key words: ZINC, EXTRACTIVE AGENT, CADMIUM, SOLVENT EXTRACTION, LEAD, TIN, EXTRACTION EQUILIBRIUM, LEAST SQUARE METHODS, MONO (ETHYLHEXYL) PHOSPHORIC ACID

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