P_(204)—正辛烷萃取和反萃Fe(Ⅲ)机理的研究

CIESC Journal

P_(204)—正辛烷萃取和反萃Fe(Ⅲ)机理的研究

刘会洲,于淑秋,陈家镛

中国科学院化工冶金研究所,中国科学院化工冶金研究所,中国科学院化工冶金研究所北京 ,北京 ,北京

出版日期:1991-06-25 发布日期:1991-06-25

Mechanism of Extraction and Stripping of Iron (Ⅲ) with HDEHP as Extractant and n-Octane as Diluent

Liu Huizhou, Yu Shuqiu and Chen Jiayong (Institute of Chemical Metallurgy, Academia Sinica, Beijing)

Online:1991-06-25 Published:1991-06-25

摘要/Abstract

摘要： 本文研究了P_(204)-正辛烷萃取体系,在硫酸介质中萃取和反萃Fe(Ⅲ)的规律.从胶体化学和结构化学的角度,通过对P_(204)-正辛烷负荷铁有机相组成、水含量的变化规律以及傅里叶变换红外光谱和动态光散射的测定表明,P_(204)萃取铁的过程是反相胶团形成过程,而反萃过程是反相胶团被破坏的过程.从而提出了一个新的可能的萃取反应机理.

Abstract: Di (2-ethylhexyl) phosphoric acid (HDEHP) is an extractant with wide applications. Through the investigation of the typical extractant systems by FT-IR and photon correlation spectroscopy and measurements of the composition and water content in the extracted organic phase, the results showed that iron (Ⅲ) was extracted mainly in unhydrated form. The extraction of iron(Ⅲ) with HDEHP was through the formation of reverse micelle in the organic phase. HDEHP in an inert solvent was in dimer form H2A2 and it probably would be converted to monomer form during extraction. The stripping of iron(Ⅲ) in the organic phase with high concentration sulfuric acid was through a process of destruction of the reverse micelle formed during ex-traction.

刘会洲,于淑秋,陈家镛. P_(204)—正辛烷萃取和反萃Fe(Ⅲ)机理的研究 [J]. CIESC Journal.

Liu Huizhou, Yu Shuqiu and Chen Jiayong (Institute of Chemical Metallurgy, Academia Sinica, Beijing). Mechanism of Extraction and Stripping of Iron (Ⅲ) with HDEHP as Extractant and n-Octane as Diluent[J]. .