首页|组氨酸选择性络合-浊点萃取除铝研究

组氨酸选择性络合-浊点萃取除铝研究

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离子吸附型稀土矿浸出工艺中,稀土浸出的同时也会有大量的铝、铁等非稀土杂质随之浸出.选用组氨酸作为络合剂选择性络合铝离子,再加入非离子表面活性剂,利用浊点萃取法萃取分离稀土料液中的铝离子,考察溶液pH、反应温度、萃取平衡时间、组氨酸的用量、组氨酸反应时间及Triton X-114的用量对除铝效果的影响,结果显示M组氨酸∶M铝=3∶1,将溶液pH调至4.5,恒温40 ℃,反应10 min后加入10 mL Triton X-114,平衡时间10 min,铝离子单次萃取率可达70.85％,稀土萃取率仅为4.45％.确定了组氨酸与铝离子的反应方程式,通过多次萃取研究,组氨酸络合萃取溶液中铝离子的最低萃取浓度cAl=0.0539 g/L±0.003 g/L,分离系数β(AVRE)=52.19,说明利用组氨酸作为络合剂与浊点萃取方法相结合时,混合溶液中铝离子能有效与稀土离子分离.
Study on the Removal of Aluminum by Histidine Selective Complexation-cloud Point Extraction
In the ion adsorption type rare earth ore leaching process,the leaching of rare earth is accompanied by the leaching of a large amount of aluminum,iron,and other non-rare earth impurities.Use histidine as a complexing agent to se-lectively complex aluminum ions,and then non-ionic surfactants are added to extract and separate aluminum ions from the rare earth feed solution using cloud point extraction.The effects of solution pH,reaction temperature,equilibrium time,amount of histidine,reaction time,and amount of Triton X-114 on the effect of aluminum removal are investigated,and the results show that the substance ratio of histidine added to aluminum is 3∶1.The pH of the solution is adjusted to 4.5,the constant tem-perature is 40 ℃,and 10 mL Triton X-114 is added after 10 min of reaction.After 10 min of equilibration time,the single ex-traction rate of aluminum ions could reach 70.85％and the loss rate of rare earth is only 4.45％.The reaction equation of his-tidine with aluminum ions was determined,and the lowest extraction concentration of aluminum ions in the histidine complex extraction solution,cA1=0.0539 g/L±0.003 g/L,and the separation coefficient,β(AVRE)=52.19,were studied by multiple extractions,indicating that the aluminum ions in the mixed solution can be effectively separated from the rare earth ions when using histidine as a complexing agent in combination with the cloud point extraction method.

rare earthhistidineselective complexationcloud point extractionaluminum removal

高亮、李金辉、温耀儒、龙光武、高阳、刘晋彪、王瑞祥、徐志峰

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江西理工大学材料冶金化学学部,江西 赣州 341000

赣州市绿色冶金与过程强化工程技术研究中心,江西 赣州 341000

自然资源部离子型稀土资源与环境重点实验室,江西 赣州 341000

赣州澳克泰工具技术有限公司,江西 赣州 341000

江西应用技术职业学院,江西 赣州 341000

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稀土 组氨酸 选择性络合 浊点萃取 除铝

国家自然科学基金项目国家自然科学基金项目国家重大项目研发计划项目国家重大项目研发计划项目江西省科技厅重大项目江西省离子型稀土资源绿色开发与高值利用国家重点实验室培育计划江西省高等学校井冈学者特聘教授岗位

51974140520640182019YFC19084042019YFC190840520192ACB7001720194AFD44003

2024

10.3724/S1004-0277.202403003

稀土
中国稀土学会 包头稀土研究院

稀土

CSTPCD北大核心
影响因子：1.172
ISSN：1004-0277
年,卷(期)：2024.45(3)
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