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伯胺(N1923)-正辛烷在硫酸体系中萃取和反萃Fe(III)机理的研究

刘会洲 , 于淑秋 , 陈家镛

金属学报

对伯胺—正辛烷萃取体系在萃取和反萃过程中有机相组成和水含量的变化用FTIR和光子相关谱进行分析研究。结果表明:伯胺与水相酸作用生成了阳离子型表面活性剂的结构,在有机相中易生成反相胶团。其萃取和反萃过程的实质是反相胶团内外的阳离子交换过程。Fe(Ⅲ)以水合形式萃取入有机相中,Fe(Ⅲ)的水解可能发生在反相胶团的微环境中。

关键词: Fe(Ⅲ) , primary amine (N1923) , extraction , stripping

MECHANISM OF EXTRACTION AND STRIPPING OF Fe(Ⅲ) WITH PRIMARY AMINE N1923 AS EXTRACTANT AND n-OCTANE AS DILUENT

LIU Huizhou , YU Shuqiu , CHEN Jiayong , Institute of Chemical Metallurgy , Academia Sinica , Beijing , China LIU Huizhou , Institute of Chemical Metallurgy , Academia Sinica , Beijing 100080 , China

金属学报(英文版)

Mechanism of extraction of Fe (III) from sulphate solution by primary amine N1923 and stripping of Fe loaded organic phase with dilute H_2SO_4 was investigated. The organic phase was characterized by FT-IR and photon correlation spectroscopy. The composition of extracted species as well as the content of H_2O in organic phase were determined. The dependence of both the rate of extraction and stripping on the formation of reverse micelle in primary amine (N1923)system has been confirmed. It is shown that the extraction of Fe(III) by primary amine sulphate may be related to the adduct formation or cation exchange reaction under different concentrations of H_2SO_4 in aqueous solution.

关键词: Fe(III) , null , null , null

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