Phase separation in solvent extraction of cobalt from acidic sulfate solution using synergistic mixture containing dinonylnaphthalene sulfonic acid and 2-ethylhexyl 4-pyridinecarboxylate ester  

采用HDNNS/4PC协萃体系从硫酸盐中萃取钴过程中的相分离（英文）

作　　者：Ting HUANG Yong-xi WANG Hui-ping HU Fang HU Yu-qing LUO Shi-jun LIU 黄婷;王永茜;胡慧萍;胡芳;罗雨晴;刘士军(中南大学化学化工学院,长沙410083)

机构地区：[1]College of Chemistry and Chemical Engineering,Central South University,Changsha 410083,China

出　　处：《Transactions of Nonferrous Metals Society of China》2019年第5期1107-1116,共10页中国有色金属学报（英文版）

基　　金：Project(2014CB643401) supported by the National Basic Research Program of China;Project(51674294) supported by the National Natural Science Foundation of China;Project(2016TP1007) supported by the Hunan Provincial Science and Technology Plan,China

摘　　要：Phase separation rate is a critical character in determining the usefulness of a solvent extraction system in hydrometallurgy. A survey of the synergistic mixture containing dinonylnaphthalene sulfonic acid (HDNNS) and 2-ethylhexly 4-pyridinecarboxylate ester (4PC) for the extraction of cobalt from acidic single metal sulfate solution was carried out to suggest how the physicochemical properties and the morphology of the reverse micelles in the loaded organic phase affect the phase separation. The results show that effective parameters affecting the phase separation are the viscosity and the excess water uptake of the loaded organic phase. It is obvious that the specific settling rate (SSR) decreases with the apparent increase of these two parameters. The measurement of small angle X-ray scattering (SAXS) proves that the morphology of the reversed micelles in the loaded organic phase changes evidently with the change of the specific settling rate (SSR).相分离速率是决定溶剂萃取体系在湿法冶金中得到应用的关键。研究二壬基萘磺酸和4-吡啶甲酸异辛酯协同混合体系从单金属硫酸盐溶液中萃取钴的相分离,探索负载有机相的物理化学性质以及反胶束的形态对相分离的影响。结果表明,负载有机相的黏度及増溶水量是影响相分离的主要因素。随着这两个因素的增加,混合澄清速率明显降低。X射线小角散射(SAXS)测量结果证实负载有机相中反相胶束的形貌会随混合澄清速率的变化而变化。

关 键 词：synergistic solvent extraction phase separation specific settling rate reverse micelle COBALT 

分 类 号：TF816[冶金工程—有色金属冶金]