Abstract

Interfacial separation of components of extractants based on di-(2-ethylhexyl)phosphoric acid (di-2EHPA) in toluene and a mixture of di-2EHPA with trioctylamine in toluene has been studied in the course of treatment with aqueous sodium hydroxide solutions yielding an organic phase and an aqueous colloidal solution of di-2EHPA sodium salt. Conditions have been found for the isolation of almost pure di-2EHPA and toluene, as well as di-2EHPA and a trioctylamine solution in toluene. The aqueous colloidal solutions have been studied by conductometry, dynamic light scattering, and ¹H-NMR spectroscopy. The considered systems are promising to be used in hydrometallurgy for improving parameters of extraction of metals and their concentrating in re-extracts.

中文翻译：

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含二（2-乙基己基）磷酸钠胶体溶液的系统中有机相组分的界面分离

摘要

在氢氧化钠水溶液处理过程中，研究了基于甲苯中二（2-乙基己基）磷酸（di-2EHPA）和di-2EHPA与三辛胺的混合物的萃取剂组分的界面分离。有机相和二-2EHPA钠盐的胶体水溶液。已经找到了分离几乎纯的di-2EHPA和甲苯，di-2EHPA和三辛胺在甲苯中的溶液的条件。胶体水溶液已通过电导测定，动态光散射和¹ H-NMR光谱进行了研究。所考虑的系统有望用于湿法冶金，以改善金属的提取参数及其在再提取物中的浓缩。