电渗析法浓缩含氨铷净化液的研究  

Concentration of ammonia-containing rubidium purification solution by electrodialysis

作　　者：徐欢喜 褚维凡 倪加惠 晋冠平 XU Huan-xi;CHU Wei-fan;NI Jia-hui;JIN Guan-ping(School of Chemistry and Chemical Engineering,Hefei University of Technology,Hefei 230009,China)

机构地区：[1]合肥工业大学化学与化工学院,安徽合肥230009

出　　处：《现代化工》2024年第2期180-183,共4页Modern Chemical Industry

基　　金：安徽省重点研究与发展计划(202104e11020005);青海省重点研究与转化计划(2021-GX-105)。

摘　　要：针对铷净化液浓度低且含氨浓度高的问题,采用分段三级电渗析浓缩工艺对吸附法获得的低浓度含氨铷净化液进行浓缩。考察了不同的电流密度及进料流量对浓缩实验的时间、能耗、相对浓缩率和铷回收率的影响。结果表明,在电流密度为20 mA/cm、流速为130 mL/min时,经过三级浓缩后Rb+质量浓度由26.6 mg/L浓缩到1976.2 mg/L。此外,在浓缩过程中,采用电解除氨的工艺可有效去除该净化液中的氨。Rubidium purification solution suffers the problems of low concentration and high ammonia content.A three-stage electrodialysis concentration process is used to concentrate the low concentration ammonia-containing rubidium purification solution obtained by adsorption method.The influences of different current densities and feed flow rates on the time,energy consumption,relative concentration rate and rubidium recovery of the concentration experiments are evaluated.It is verified that the Rb+concentration is concentrated from 26.6 mg·L-1 to 1976.2 mg·L-1 after experiencing three-stage concentration at a current density of 20 mA·cm-1 and a flow rate of 130 mL·min-1.In addition,ammonia can effectively be removed from this purification solution by using an electrolytic de-ammonia process during the concentration process.

关 键 词：铷净化液 电渗析 浓缩 电解 除氨 

分 类 号：TQ028.74[化学工程]