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
复制标题
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
中科院分区:
文献类型:
--
作者:
WangLiangshi;Huang Xiaowei;Yu Ying;Xiao Yanfei;Long Zhiqi
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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