Solvent extraction separate of zinc and cadmium from magnesium and calcium in sulfuric acid medium by mixing extractants

作     者：LI Xiao-hui AI Xian-bin HE Li JI Shao-shi HU Miao DING Jian-nan LI Feng 李晓晖;艾仙斌;何力;计少石;胡淼;丁建南;李凤

作者机构：Institute of Biological ResourcesJiangxi Academy of ScienceNanchang 330096China Institute of EnergyJiangxi Academy of ScienceNanchang 330096China Kopper Chemical Industrial Corp.Ltd.Chongqing 401221China 

出 版 物：《Journal of Central South University》 (中南大学学报（英文版）)

年 卷 期：2017年第24卷第10期

页      面：2253-2259页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070302[理学-分析化学] 0703[理学-化学] 070301[理学-无机化学] 

基　　金：Projects(20151BBG70009,20151BBE50115)supported by Jiangxi Science and Technology Projects,China Projects(2014-YYB-06,2014-YYB-11)supported by Scientific Research and Development Project of Jiangxi Academy of Sciences,China 

主　　题：synergistic extraction cadmium zinc Mextral V10 aromatic hydroxamic 

摘      要：Synergistic extraction has been proven to enhance extractability and selectivity for the separation of cadmium and zinc from magnesium and calcium in the sulfuric acid medium with Mextral V10 and Mextral 622H(aromatic hydroxamic)mixtures diluted in *** of Mextral V10 and 622H are highly selective for Zn and Cd over Mg and Ca compared with the single Mextral V10,resulting in larger synergistic shifts for zinc and cadmium with theΔpH_(50(Zn–Ca))values increasing substantially from0.83 to 1.73 pH units andΔpH_(50(Cd–Ca))values increasing from 0.63 to 2.13 p H *** aqueous to organic ratio(A/O ratio),the saponification ratio of Mextral V10 and extracting agent concentration were studied on the effect of metal ions extraction,which helped to increase the organic capacity of metal *** Mc Cabe-Thiele plot for Cd and Zn extraction with 5%(volume fraction)Mextral V10 and 5%Mextral 622H extractants mixture indicate the necessity of only one theoretical stages at an A/O ratio of 1.5:*** stage extraction simulation test conducted at pH 6.50 shows that Cd and Zn reach the extraction of 99.6%and 97.9%,respectively,and only low levels of magnesium and calcium are extracted in the organic *** extracted Zn^(2+)or Cd^(2+)-organic species are Zn(A_1)(A_2)or Cd(A_1)(A_2)with the mixture system by slope analysis.