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- Title
Recovery of V<sub>2</sub>O<sub>5</sub> from Bayer liquor by ion exchange.
- Authors
Zhao, Zhuo; Li, Xiaobin; Zhao, Qingjie
- Abstract
A new technology was developed to recover V2O5 from Bayer spent liquor by ion exchange. The experimental results show that in the conditions of 105°C and 0.20–0.25 mass ratios between CaO in lime and Al2O3 in spent liquor, the precipitation rate of vanadium in Bayer liquor is more than 85%. The vanadium-bearing precipitation is leached by NaHCO3 solution. The leaching rate of vanadium can reach 85% in the conditions of 95°C, 40 g·L−1 of NaHCO3 concentration, and ventilating of CO2. The 201 × 7 type of resin has good adsorption effect on vanadium in the leaching solution. The adsorption rate is more than 94% with the flow rate of 0.09 mL·min−1·g−1 of leaching solution and the temperature of 40–50°C. By using 3 mol·L−1 of NaOH to desorb the saturated resin after adsorption at 40–50°C, a solution with more than 5 g·L−1 of V2O5 can be obtained. After roasting ammonium metavanadate that precipitates from the desorption solution when NH4Cl is added at the temperature of 500–550°C for 2 h, V2O5 with more than 99% of purity is obtained.
- Publication
Rare Metals, 2010, Vol 29, Issue 2, p115
- ISSN
1001-0521
- Publication type
Article
- DOI
10.1007/s12598-010-0020-8