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Rare Earth Element Recovery Using Monoethanolamine

机译:稀土元素恢复使用单乙醇胺

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Current methods of rare earth element (REE) recovery from industrial solutions are environmentally untenable and have significant waste management challenges. Increasing global REE consumption necessitates the development of new, sustainable means of production. Herein, we report a means of recovering aqueous REEs using monoethanolamine and carbon dioxide as predicted using the Mixed-Solvent Electrolyte thermodynamic model. Validation experiments have demonstrated the > 99% recovery of Nd(3+)as its normal carbonate, with the filtrate containing monoethanolamine hydrogen chloride. Additional experimentation also demonstrated the > 99% recovery of aqueous La(3+)and Y(3+)as their respective normal carbonates. These findings demonstrate that a thermodynamic simulation engine may be used to decrease the number of empirically driven experiments required to develop a new, high yield REE recovery unit operation that is applicable to concentrated and dilute aqueous solutions typical of industrial streams.
机译:从工业解决方案中恢复的稀土元素(REE)的目前的方法是环保的,具有重要的废物管理挑战。增加全球REE消费需要开发新的,可持续的生产手段。在此,我们报告使用单乙醇胺和二氧化碳回收水性REES的方法,如使用混合溶剂电解质热力学模型预测的。验证实验证明了Nd(3+)作为其正常碳酸盐的> 99%的回收率,含有单乙醇胺氯化氢的滤液。另外的实验还证明了La(3+)和y(3+)作为其各自的正常碳酸盐的回收率> 99%。这些发现表明,热力学模拟发动机可用于降低开发新的高产簧片恢复单元操作所需的经验驱动实验的数量,该实验适用于典型的工业流典型的浓缩和稀释的水溶液。

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