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投稿时间：2016-10-09 修订日期：2016-10-11 录用日期：2016-10-17 网络发布日期：2017-01-22
投稿时间：2016-10-09 修订日期：2016-10-11 录用日期：2016-10-17 网络发布日期：2017-01-22
中文摘要: 采用加盐萃取法从高酸浸出液中直接分离富集钒，考察了酸度、N235浓度、氯化钠浓度、硫酸钠浓度对N235萃取分离高浓度硫酸溶液中钒的影响，并确定了萃合物的结构。结果表明，Cl-和SO42-对硫酸体系钒的萃取均有一定提高，但Cl-的作用效果更显著。在不加盐的条件下，采用20%N235为萃取剂，磺化煤油为稀释剂，硫酸浓度1 mol/L，萃取时间10 min，相比A/O=1︰1，经单级萃取，硫酸体系中钒的萃取率仅为30%左右；加入一定量的NaCl、Na2SO4后，钒的萃取率分别达到80%、47%。Cl-作用于硫酸体系时，与钒以离子缔和形式形成萃合物(R3N)x?(VO2 ?Cl-)y；SO42-的加入可促进的VO2SO4-的形成，使萃取率提高。
Abstract:Vanadium was extracted from high-acidity leaching solution of stone coal with N235 and addition of inorganic salt. The effects of acidity, and concentration of N235, NaCl, and Na2SO4 on vanadium extraction efficiency in high concentrated H2SO4 solution were investigated. The structure of extracted complex was determined. The results show that vanadium extraction efficiency can be promoted by Cl- and SO42- in concentrated H2SO4 solution. After one-stage extraction under the conditions including 20% N235, initial sulfuric acid concentration of 1 mol/L, extraction time of 10 min, and phase ratio A/O=1, only 30% of vanadium is extracted in H2SO4 system while adding a certain amount of NaCl and Na2SO4 raises vanadium extraction rate to 80% and 47% respectively. NaCl has bigger effect to direct extract vanadium from concentrated H2SO4 solution with production of (R3N)x?(VO2 ?Cl-)y in form of ion association. Vanadium extraction efficiency rises with increase of?VO2SO4- concentration when SO42- concentration is improved.
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基金项目:国家科技支撑计划项目(2015BAB03B05)；国家自然科学基金资助项目（51404174）
| 作者 | 单位 | |
| 谌纯 | 武汉理工大学 资源与环境工程学院 | chen_chun914@163.com |
| 张一敏* | 武汉理工大学 资源与环境工程学院 | zym126135@126.com |
| 黄晶 | 钒资源高效利用湖北省协同创新中心 | |
| 包申旭 | 武汉理工大学 资源与环境工程学院 |
| Author Name | Affiliation | |
| Shenchun | Wuhan University of Technology | chen_chun914@163.com |
| Zhangyimin | zym126135@126.com | |
| Huangjing | ||
| Baoshenxu |
引用文本：
谌纯,张一敏,黄晶,包申旭.高浓度H2SO4体系中Cl-和SO42-对N235萃取钒的影响[J].有色金属（冶炼部分）,2017(2):36-39.
Shenchun,Zhangyimin,Huangjing,Baoshenxu.Effect of Cl- and SO42- on Vanadium Extraction in Concentrated H2SO4 Solution with N235[J].Nonferrous Metals (Extractive Metallurgy),2017(2):36-39.
谌纯,张一敏,黄晶,包申旭.高浓度H2SO4体系中Cl-和SO42-对N235萃取钒的影响[J].有色金属（冶炼部分）,2017(2):36-39.
Shenchun,Zhangyimin,Huangjing,Baoshenxu.Effect of Cl- and SO42- on Vanadium Extraction in Concentrated H2SO4 Solution with N235[J].Nonferrous Metals (Extractive Metallurgy),2017(2):36-39.
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