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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 19    No. 3    June 2009

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Removal of vanadium from ammonium molybdate solution by ion exchange
LI Qing-gang(李青刚)1, 2, ZHANG Qi-xiu(张启修)2, ZENG Li(曾 理)2,
XIAO Lian-sheng(肖连生)1, 2, YANG Ya-nan(杨亚男)2

1. State Key Laboratory of Metallurgy and Materials of Rare Metal, Central South University,
Changsha 410083, China;
2. School of Metallurgical Science and Engineering, Central South University, Changsha 410083, China

Abstract:The separation techniques of vanadium and molybdenum were summarized, and a new method of removal V(Ⅴ) from Mo(Ⅵ) by adsorption with chelate resin was presented. Nine kinds of chelate resins were used to investigate the adsorbent capability of V(Ⅴ) in ammonium molybdate solution with static method. The test results show that DDAS, CUW and CW-2 resins can easily adsorb V(Ⅴ) in ammonium molybdate solution, but hardly adsorb Mo(Ⅵ). The dynamic experimental results show more than 99.5% of V(Ⅴ) can be adsorbed, and the adsorption rate of Mo(Ⅵ) is less than 0.27% at 294−296 K for 60 min at pH 7.42−8.02. The mass ratio of V to Mo decreases to l/5 0000 in the effluent from 1/255 in the initial solution. The loaded resin can be desorbed by 5% NH3∙H2O solution, and the vanadium desorption rate can reach 99.6%. The max concentration of vanadium in desorbed solution can reach 20 g/L, while the concentration of molybdenum is less than 0.8 g/L.

 

Key words: ammonium molybdenum; vanadium; chelate resin; ion exchange; separation

ISSN 1672-7029
CN 43-1423/U

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