(中国科学院化工冶金研究所, 北京 100080)
摘 要: 用酸性硫脲溶液从载钯P-950哌啶树脂解吸钯的动力学研究结果表明，该解吸过程的动力学遵循Boyd液膜扩散方程，解吸钯的速率随盐酸浓度的增加而下降；当温度升高时，解吸速率增加；提高硫脲浓度，有利于钯的解吸。实验测得的液膜扩散系数 K =7.30×10-2 s-1, 解吸表观活化能Ea=19.03 kJ/mol。
关键字: 阴离子交换树脂 钯 解吸动力学
（Institute of Chemical Metallurgy, Chinese Academy of Sciences, 100080 Beijing）
Abstract:Kinetics of palladium desorption from a new type resin (P-950) in acidic thiourea solution was investigated. The experimental results demonstrated that the desorption of palladium-thiourea complex from the resin can be described by Boyd's diffusion equation of liquid film. The desorption rate of palladium reduced remarkably with the increase of HCl concentration; the increase of thiourea concentration and temperature accelerated the desorption of palladium- thiourea complex. The distribution coefficent of the desorption K =7.30×10-2 s-1 and the apparent activation energy of the desorption Ea=19.03 kJ/mol were obtained based on the experimental results.
Key words: anion exchange resin palladium desorption kinetics
