Recovery of vanadium from the precipitate obtained by purifying the wash water formed in refining crude TiCl₄

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• 作者：Mingyu Wang ;   ; ^a ;   ; ^{wmydxx@163.com} ; Xuewen Wang^a ; Puhong Ye^a
• 关键词：TiCl₄ purification ; Vanadium removal ; Vanadium recovery
• 刊名：Hydrometallurgy
• 出版年：2011
• 出版时间：December 2011
• 年：2011
• 卷：110
• 期：1-4
• 页码：40-43
• 全文大小：541 K

文摘

The recovery of vanadium from the precipitate formed from the wash water in the removing vanadium process from crude TiCl₄ with copper wire was investigated by NaOH leaching, followed by ion exchange and precipitation of V₂O₅. The results indicated that this technology was an effective method for the recovery of vanadium from the precipitate. Under the optimum leaching conditions (10 % NaOH leaching for 3 h at 98 ¡ãC with a pulp density of 29 % ), the vanadium leaching could reach 81.5 % . The vanadium in the leach liquor was adsorbed by weak base resin D314, and the loaded resin was eluted by 2 mol/L NaOH. The adsorption and desorption of vanadium was 98.3 % and 99.2 % , respectively. NH₄Cl was used to precipitate vanadium from the desorption liquor, then the ammonium metavanadate was calcined at 550 ¡ãC for 1 h to produce the high purity V₂O₅ powder. The overall vanadium recovery was 79.5 % .