Abstract

The kinetics of sorption and regeneration from industrial nitric acid–phosphoric acid solutions with the use of ion-exchange resins like KU-2 has been studied for both individual rare-earth elements (REEs) and their mixtures with the measurement of sorption and regeneration isotherms. The high rate of the mentioned processes enables the use of these resins in pulsed columns with a fluidized resin bed. It has been shown that the efficiency of sorption columns can be improved by decreasing the volume of equipment and a one-time sorbent load. It has been established that the specific solution flow rate (10–12 m³/(m² h)) in a pulsed column is 4–5 times higher than in standard columns with a continuous sorbent bed. The use of pulsed columns provides a six- to sevenfold decrease in the one-time sorbent load. The measured data of on the sorption of REEs on sulfocationites may be used for the design of industrial pulsed columns.

中文翻译：

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在脉冲柱中研究使用硫酸盐从硝酸-磷酸溶液中吸附稀土元素的过程

摘要

使用离子交换树脂（如 KU-2）从工业硝酸-磷酸溶液中吸附和再生的动力学已针对单个稀土元素 (REE) 及其混合物进行了吸附和再生等温线测量. 上述方法的高速率使这些树脂能够在带有流化树脂床的脉冲柱中使用。已经表明，可以通过减少设备体积和一次性吸附剂负载来提高吸附柱的效率。已经确定，比溶液流速（10-12 m ³ /（m ²h)) 在脉冲色谱柱中的含量是具有连续吸附剂床的标准色谱柱的 4-5 倍。使用脉冲色谱柱可将一次性吸附剂负载量减少 6 到 7 倍。REEs在硫酸盐上的吸附测量数据可用于工业脉冲柱的设计。