HDEHP萃取镓的机理

MECHANISM OF SOLVENT EXTRACTION OF GALLIUM CHLORIDE BY DI-(2-ETHYL HEXYL)PHOSPHATE(HDEHP)

摘要: <正> 引言镓与伴生元素铝、铁和铜的分离可用20％TBP-二甲基溶液从盐酸或硫酸溶液中萃取镓来实现,萃取效率可高达99.9％以上,但必须在浓盐酸条件下进行。Morris用中性磷类萃取剂TBP从盐酸溶液中萃取氯化镓时,观察到溶液中酸度为0.2—0.6 mol/l时,镓
- 氯化镓 ,
- HDEHP ,
- 溶剂萃取 ,
- 平衡常数
Abstract: In the present work, the solvent extraction of gallium (III) from all aqueousphase of chloride by di-(2-ethyl hexyl) phosphaie HDEHI, in benzene isinvestigated. The extractability of gallium chloride is determined as a functionof extraction time, extractant concentration, acidity and, gallium concentration. Itis found that the distribution coefficient for Ga (III) is proportional to thesecond power of the extractant concentration and the inverse second power ofhydrogen ion concentration. Suitable stripping conditions are found. In a pHrange of 1.5--2.2, the mechanism of galliuin extraction can be represented as thefollowing equation Ga~(3+)+Cl~-+2(HA)_(2(o))=GaCl(HA_2)_(2(o))+2H~+At a constant ionic strength(μ=0.025)and temperature(15℃)the correspondingequilibrium constant K is found to be 30.3.
- Galliam Chloride ,
- ,
- HDEHP ,

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[4]	钱和生 HEHEHP萃取镓的机理研究,化学试剂,待发表.
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