Study on the diffusion kinetics of adsorption of heavy rare earth with Cyanex272-P507 impregnated resin  

作　　者：廖春发 聂华平 焦云芬 梁勇 杨少华 

机构地区：[1]School of Materials and Chemistry,Jiangxi University of Science and Technology

出　　处：《Journal of Rare Earths》2010年第S1期120-124,共5页稀土学报（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (5076403);Natural Science Foundation of Jiangxi Province (0450065)

摘　　要：Kinetics of adsorption of heavy rare earth with Cyanex272-P507 impregn ated resin was studied. The influences of temperature,concentration,granularit y of resin on the exchange degree were investigated by the limited bath method. The result showed that the controlling factor of RE3+/H+ diffusion on Cyanex272-P507 extraction resin was particles diffusion. The process of diffuse kinetics f itted well with the expression developed by Body model. The apparent activation energy was determined as 23.20 kJ/mol. The reaction order was 0.452. In addition,the constant of particles diffusion(D0) was 1.352×10-8 m2/S and the entropy of diffusion was-47.055 J/(mol·K).Kinetics of adsorption of heavy rare earth with Cyanex272-P507 impregn ated resin was studied. The influences of temperature,concentration,granularit y of resin on the exchange degree were investigated by the limited bath method. The result showed that the controlling factor of RE3+/H+ diffusion on Cyanex272-P507 extraction resin was particles diffusion. The process of diffuse kinetics f itted well with the expression developed by Body model. The apparent activation energy was determined as 23.20 kJ/mol. The reaction order was 0.452. In addition,the constant of particles diffusion(D0) was 1.352×10-8 m2/S and the entropy of diffusion was-47.055 J/(mol·K).

关 键 词：extraction chromatography impregnated resin kinetics heavy rare earth 

分 类 号：TF845[冶金工程—有色金属冶金]