支撑液膜法提取稀土的动力学
来源期刊：中南大学学报(自然科学版)1994年第4期
论文作者：刘又年 舒万艮 黄可龙
文章页码：535 - 539
关键词：稀土元素; 动力学方程; 支撑液膜
Key words：rare earth elements; kinetics equation; supported liquid membrane
摘 要：研究了以聚丙稀为支撑膜、以二(2－乙基已基)磷酸为载体提取稀土的支撑液膜体系,通过实验确定了料液的PＨ值、载体浓度等与稀土离子渗透系数之间的关系;建立了动力学方程;并计算了料液－膜测传质边界层的厚度和稀土配合物在膜内的扩散系数.
Abstract: Separation of rare earths from rare earth ore leach solution with di-(2－ethylhexyl)phos-phoric acid as extractant is carried out with supported liquid membrane,The kinetics of ex-traction can be expressed,as a function of aciditv of the feed solution and the concentrationof membrane carries. The coupled-transport model describing the permeability coefficient of Re3+ is derived.The experimental results are in agreement with the theoretical value.
