利用弱碱性阴离子交换树脂从硫化后的钨酸钠溶液中吸附除钼.pdf

第24卷第6期
中国有色金属学报
2014年6月
Volume 24 Numbe
The Chinese Journal of Nonferrous Metals
June 2014
文章编号:1004-0609(2014)06-1623-06
利用弱碱性阴离子交换树脂从硫化后的
钨酸钠溶液中吸附除钼
霍广生12,彭超,陈星宇2,廖春华,陈静1
(1.中南大学治金与环境学院,长沙410083:
2.中南大学难治有色金属资源高效利用国家工程实验室,长沙410083)
摘要:弱碱性阴离子交换树脂(伯胺型)可从钨酸盐溶液中优先吸附MoOS,且负载树脂易于用NaOH解吸,
但当钨酸钠溶液中钼含量较低时其对钼的吸附容量很小。为提高其对钼的吸附容量,研究钨酸钠溶液成分及硫化
剂种类对钼吸附行为的影响。结果表明:对于含93g/LWO3的钨酸钠溶液,钼的吸附率和吸附容量随料液中钼浓
度的增加而增大:相对于Na2S,以 NAHS作为硫化剂可明显降低溶液的平衡pH值,显著改善钼的硫化效果,从
而更有利于钼的吸附;对于含85gLWO3、7.6gLMo、100gLNa2CO2的钨酸钠溶液,以NaHS作为硫化剂硫化
后,经动态吸附得到的钨酸钠溶液中,WO3与Mo的质量比达到1970:1,除钼率达9.4%,钨损失率仅为15%,
钼的吸附容量(单位体积的湿树脂吸附的钼的质量)达31mg/mL。经1.0 mol/L NAOH溶液解吸后,钼的解吸率达
97.3%。
关键词:钨;钼;离子交换树脂;硫化;吸附
中图分类号:TF815
文献标志码:A
Removal of Mo from sulfurized tungstate solution by
using alkalescent anion exchange resin
HUO Guang-sheng, PENG Chao CHEN Xing-yu., LIAO Chun-hua CHEN Jing
( 1. School of Metallurgy and Environment, Central South University, Changsha 410083, China;
2. National Engineering Laboratory for Efficient Utilization of Refractory Nonferrous Metals Resources,
Central South University, Changsha 410083, China)
Abstract: Thiomolybdate( Moo SA )has high affinity to alkalescent anion exchange resin(primary amine) and can e
striped with NAOH solution easily, but the adsorption capacity of Mo is very low when Mo content in Na2 solution is
low. To increase the adsorption aaciy ofm the effects of Na WO composition of solution and the kind of sulfurizing
reagent on the adsorption behavior of Mo were studied. The results show that the adsorption rate and adsorption capacity
of Mo increases with increasing Mo concentration for Na WO solution containin 3 L WO The sulfurizing reagent
NAHS, as a alternative to Na S, lowers the equilibrium PH value of solution and favors sulfurizing and adsorbing of Mo
The N W solution containin 85 L WO 7.6 M 100 /Na O sulfurized with NAHS is adsorbed by means
of column test, and mass ratio of WO to Mo of the elution before breakthrough reaches 1970: 1, the removal ratio of Mo
is 99.4%, the loss rate of WO is 1. 5%, and the adsorption capacity of Mo is 31 mg/ML. The stripping ratio of Mo is
97.3% when the loaded resin stripped with 1 mol/L NAOH solution
Key words: tungsten; molybdenum; anion exchange resin; sulfurizing; adsorption
基金项目:国家自然科学基金资助项目(51174232)
收稿日期:2013-10-25;修订日期:2014-01-0
通信作者:霍广生,副教授,博士;电话:13973171259:E-mai:shuo(@csu.edu.cn