一种绿色提取工艺,用于选择性回收基于疏水性贝他因衍生物离子液体的Sc(iii)
Xiang Su1, Huipeng Liu1, Gang Tian1
1School of Chemistry and Environmental Engineering, Pingdingshan University Pingdingshan Henan 467000 PR China m13526718841@163.com.
RSC advances
|February 7, 2024
概括
两种新的离子液体[Laur][Tf2N]和[Coca][Tf2N]被合成用于高效的 (Sc(iii)) 提取. 这些疏水性液体实现了96%以上的回收,并使其能够从稀土中分离出来,在多个循环中显示出高稳定性.
科学领域:
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
- 分离科学 分离科学
背景情况:
- 对于其在先进技术中的使用而言,有效的回收 (Sc(iii)) 是至关重要的.
- 离子液体 (ILs) 为选择性金属提取提供可调节的特性.
- 需要开发具有成本效益和稳定的ILs来恢复.
研究的目的:
- 为了合成和描述新的疏水性碳酸酸离子液体,用于Sc(iii) 提取.
- 评估合成ILs的提取效率,机制和剥离性能.
- 评估使用这些ILs从其他稀土元素中分离Sc(iii) 的潜力.
主要方法:
- 合成了两种新的离子液体:[劳瑞尔贝他因][bis(三甲硫尼尔) 胺] ([劳尔][Tf2N]) 和[可卡米多贝他因][bis(三甲硫尼尔) 胺] ([可卡][Tf2N]).
- 描述IL的特性,包括热稳定性,疏水性和粘度.
- 优化Sc(iii) 提取条件 (时间,度,pH) 和使用光谱学 (IR,13C NMR) 和斜率分析调查提取机制.
- 评估ILs的剥离效率和可回收性.
主要成果:
- [Laur][Tf2N]和[Coca][Tf2N]都表现出极好的热稳定性 (>250°C) 和疏水性.
- 在最佳条件下,获得了超过98.7%的[Laur][Tf2N]和96.0%的[Coca][Tf2N]的提取效率.
- 证实了阴离子交换机制,并通过稀释酸实现了高效的剥离.
- 在五个循环中,ILs表现出高稳定性和可回收性,而无显著的效率损失.
- 由于不同pH值的提取效率不同,可以从其他稀土中选择性地分离Sc(iii).
结论:
- 合成的碳素酸离子液体[Laur][Tf2N]和[Coca][Tf2N]对于的提取非常有效.
- 这些IL提供了一个有希望的,稳定的和可回收的解决方案,用于从稀土混合物中回收和分离.
- 从两表面活性剂的成本效益高的合成使得这些IL对工业应用具有吸引力.
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