引用本文:
董殿权, 张凤宝, 张国亮, 刘亦凡. LiAlTiO4的合成及对Li+的离子交换选择性[J]. 应用化学,
2005, 22(7): 754-758.
Citation: DONG Dian-Quan, ZHANG Feng-Bao, ZHANG Guo-Liang, LIU Yi-Fan. Synthesis of LiAlTiO4 and Its Selectivity to Li+ Exchange[J]. Chinese Journal of Applied Chemistry, 2005, 22(7): 754-758.
Citation: DONG Dian-Quan, ZHANG Feng-Bao, ZHANG Guo-Liang, LIU Yi-Fan. Synthesis of LiAlTiO4 and Its Selectivity to Li+ Exchange[J]. Chinese Journal of Applied Chemistry, 2005, 22(7): 754-758.
LiAlTiO4的合成及对Li+的离子交换选择性
摘要:
用共沉淀/热结晶方法合成出尖晶石型无机离子交换剂LiAlTiO4,对其进行了酸改型,测定了其对碱金属离子的饱和交换容量、分配系数和pH滴定曲线等离子交换性,并对其进行了X射线衍射分析。结果表明,用不同浓度HNO3溶液处理LiAlTiO4时,Li+的抽出率在28%~72%,Al3+的浸出率为6.8%以下;酸型交换剂LiAlTi-700(H)对Li+的饱和交换容量高于其它碱金属离子的饱和交换容量,达到4.29 mmol/g(即30.03 mg/g);LiAlTi-700(H)对Li+的选择性高于其它碱金属离子。说明LiAlTi-700(H)对Li+具有较强的记忆性和离子交换选择性,是一种有应用前景的锂离子筛。
English
Synthesis of LiAlTiO4 and Its Selectivity to Li+ Exchange
Abstract:
The ion-exchanger LiAlTiO4 of spinel type was prepared by means of the common precipitation/hydrothermal crystallization method,then was acid-modified.Its ion-exchange proporties for alkali ions such as saturation capacity of exchange,distribution coefficient and the pH titration curve were determind.LiAlTiO4 was characterized by virtue of X-ray diffraction method.The acid treatment of LiAlTiO4 causes Li+ extraction ratio to change from 28% to 72%,while the dissolution of Al is less than 6.8%.This inorgnic ion-exchanger (LiAlTiO4-700) has the saturation capacity of exchange for Li higher than those for other alkali ions,the saturation capacity of exchange for Li+ reaches to 4.29 mmol/g (30.03 mg/g);LiAlTiO4-700(H) has a higher selectivity of ion exchange for Li+ than for other alkali ions.These result show LiAlTiO4-700(H) has better memory and selectivity of ion exchange,and higher capacity of ion exchange for Li+.It is a kind of prospective ionic sieve for Li+.
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Key words:
- complex oxide
- / lithium
- / ion exchange
- / inorganic ion exchanger
- / spinel type
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