Eliminating ammonia emissions during rare earth separation through control of equilibrium acidity in a HEH(EHP)-Cl system

Eliminating ammonia emissions during rare earth separation through control of equilibrium acidity in a HEH(EHP)-Cl system
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通过控制 HEH(EHP)-Cl 系统中的平衡酸度消除稀土分离过程中的氨排放

DOI:
10.1039/c3gc40470f
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发表时间:
2013-06
期刊:
影响因子:
9.8
通讯作者:
Long Zhiqi
Long Zhiqi
中科院分区:
化学1区
文献类型:
--
作者:
WangLiangshi;Huang Xiaowei;Yu Ying;Xiao Yanfei;Long Zhiqi

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本文研究开发了一种新的环境友好的稀土分离方法。一种用于控制HEH(EHP)-Cl系统中的平衡酸度的技术在稀土分离期间实现无氨排放,同时获得具有高稀土负载的有机相。首先在HEH(EHP)-Cl体系中研究了平衡酸度控制技术的模拟模型,以确定逆流萃取体系的萃取平衡和质量平衡,从而优化多组分体系中的质量分布。使用这些结果,在HEH(EHP)-Cl系统中分离Gd和Tb的中试试验使用所提出的平衡酸度控制技术进行,并且没有皂化,以验证该过程,并表明该方法使用工业分离过程获得无氨排放物。
This paper investigates the development of a new environmentally friendly approach for rare earth separation. A technique for controlling equilibrium acidity in a HEH(EHP)-Cl system achieves ammonia-free emissions during rare earth separation while obtaining an organic phase with high rare earth loading. A simulated model of the proposed equilibrium acidity control technology is first studied in a HEH(EHP)-Cl system to determine the extraction equilibrium and mass balances for a counter current extraction system, so as to optimize the mass distribution in the multi-component system. Using these results, a pilot test separating Gd and Tb in a HEH(EHP)-Cl system is conducted using the proposed equilibrium acidity control technology, and without saponification, to verify the process and show that the method obtains ammonia-free emissions using an industrial separation process.
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