| N263萃取分离锌铁及其热力学研究 |
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| 引用本文： | 丁家杰,谈定生,王俊杰,陈哲,李启文,杨健,丁伟中.N263萃取分离锌铁及其热力学研究[J].矿产保护与利用,2021,41(4):70-77. |
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| 作者姓名： | 丁家杰 谈定生 王俊杰 陈哲 李启文 杨健 丁伟中 |
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| 作者单位： | 上海大学 材料科学与工程学院,上海200444;上海大学 材料科学与工程学院,上海200444;上海大学省部共建高品质特殊钢冶金与制备国家重点实验室,上海200444 |
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| 摘 要： | 研究了用N263从氯化物体系中萃取Zn2+、Fe2+和Fe3+，考察了振荡时间、萃取剂浓度、改性剂浓度、相比（O/A）、盐酸浓度对Zn2+、Fe2+和Fe3+萃取率的影响。结果表明，在有机相组成为20% N263+20%正己醇+60% 260#溶剂油、相比O/A=1 GA6FA 1、振荡时间5 min和25℃条件下，Zn2+、Fe2+和Fe3+的单级萃取率分别为90.97%、0.79%和75.85%，分离系数βZn2+/Fe2+和βZn2+/Fe3+分别为1 260和3.21。经过2级逆流萃取，水相中Zn2+浓度从9.61 g/L降至0.36 g/L，负载有机相采用0.5 mol/L H2SO4反萃，Zn2+的反萃率为41.86%，Fe3+的反萃率大于97%。N263萃取金属离子的机理是阴离子交换反应，计算了萃取反应相关的热力学函数值，结果表明，N263萃取Zn2+为放热反应，Fe3+的萃取反应为吸热反应，常温下Zn2+和Fe3+的萃取反应均可自发进行。
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| 关 键 词： | N263 溶剂萃取 锌 铁 分离 |
| 收稿时间： | 2021-08-06 |
Extraction Separation of Zinc and Iron with N263 and Its Thermodynamics |
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| DING Jiajie,TAN Dingsheng,WANG Junjie,CHEN Zhe,LI Qiwen,YANG Jian,DING Weizhong.Extraction Separation of Zinc and Iron with N263 and Its Thermodynamics[J].Conservation and Utilization of Mineral Resources,2021,41(4):70-77. |
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| Authors: | DING Jiajie TAN Dingsheng WANG Junjie CHEN Zhe LI Qiwen YANG Jian DING Weizhong |
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| Affiliation: | 1.School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China2.State Key Laboratory of Advanced Special Steel, Shanghai University, Shanghai 200444, China |
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| Abstract: | The extraction of zinc and iron with N263 from chloride solution was studied. The effects of oscillation time, extractant concentration, modifier concentration, phase ratio(O/A), and hydrochloric acid concentration on the extraction rate of zinc and iron were investigated. The results showedthe extraction rate of Zn2+, Fe2+ and Fe3+ were 90.97%, 0.79% and 75.85%, respectively, and the separation coefficient of βZn2+/Fe2+and βZn2+/Fe3+ were 1 260 and 3.21, respectively, under the conditions of extractant composition of 20% N263+20% n-hexanol+60% 260# solvent oil, phase ratio(O/A) of 1 GA6FA 1, oscillation time of 5 min, 25 ℃. Meanwhile, the concentration of zinc in the aqueous phasedecreased from 9.61 g/L to 0.36 g/L by two-stage countercurrent extraction. The stripping rate of Zn2+ was 41.86% and more than 97% of Fe3+ was stripped with 0.5 mol/L sulfuric acid. Additionally, the mechanism of extraction of metal ions by N263 is anion exchange reaction. The extraction equilibrium isotherms of zinc and iron were plotted, and the thermodynamic functions of the extraction reaction were calculated. The results indicated that the extraction of Zn2+ by N263 is exothermic, and the extraction of Fe3+ is endothermic. The extraction of Zn2+ and Fe3+ can proceed spontaneously at room temperature. |
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