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Rare Earth Extraction Process in Sulfates Using Saponified Extractants by A Barrier Agent
Author(s): 
Pages: 533-537
Year: Issue:  5
Journal: Journal of the Chinese Rare Earth Society

Keyword:  阻断剂硫酸复盐萃取皂化稀土;
Abstract: 硫酸稀土溶液是稀土分离过程中的重要中间产品,皂化剂引入的Na+,NH4+等离子易导致硫酸稀土复盐沉淀,制约了皂化萃取剂在硫酸体系中萃取稀土元素的工业应用.提出了一个在硫酸体系中引入阻断剂实现皂化萃取稀土的工艺设想,并给出了阻断剂的选取方法.利用萃取分离过程中一价阳离子、阻断剂离子和稀土离子按萃取顺序在槽体中形成的自然分布,隔断一价阳离子与稀土离子的接触,从而避免了难溶硫酸稀土复盐的生成,为工业实现硫酸体系皂化萃取稀土提供了可能.
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