| 伯胺N1923从盐酸溶液中萃取镉(Ⅱ)的机理 |
| EXTRACTION MECHANISM OF CADMIUM(Ⅱ)FROM HYDROCHLORIDE SOLUTION BY PRIMARY AMINE N1023 |
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| 摘要: 伯胺N1923从HCl介质中可以两种机理萃取Cd(Ⅱ),在微酸性溶液中以配位反应萃取Cd(Ⅱ)生成的化合物为(RNH2)3CdCl2;而在酸性溶液中萃取机理为加合反应,萃合物的组成是(RNH3+)3[CdCl53-],并计算了两种反应的浓度平衡常数及热力学函数. |
| 关键词: 伯胺 萃取机理 镉(Ⅱ) |
| 基金项目: |
| Abstract: The extraction equilibrium of Cd(Ⅱ)from hydrochloride solution by N1923 has been studied. It was found that CdCl2 can be extracted with free amine(RNH2)or its chloride(RNH3Cl)by different extraction mechanism. It belongs to the mechanism of solvated complex with RNH2 as extractant at pH>2 and the extracted complex is(RNH2)3 CdCl2 formed with Cd-N coordination bond. Otherwise, it is adduct reaction between RNH3C1 and CdCl2 produced the complex(RNH3+)3[CdCl53-] while the extractant is RNH3C1. The reactions are as follows, respectively. 3RNH2(o)+CdCl2⇔(RNH2)3CdCl2(o) (RNH3Cl)3(0)+CdCl2⇔(RNH3+)3[CdCl53-](o) The equilibrium constants and thermodynamic founctions of both reactions were calculated. The IR and NMR of the extracted complexes were investigated. |
| Keywords: primary amine extraction mechanism cadmium |
| 投稿时间：1986-08-18 |
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| 乐少明,李德谦,倪嘉缵.伯胺N1923从盐酸溶液中萃取镉(Ⅱ)的机理[J].无机化学学报,1987,3(4):51-59. |
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