Solubility Data for the KOH鈥揔2CO3鈥揔3VO4鈥揌2O System at (313.15 and 353.15) K

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• 作者：Na Yang ; Hao Du ; Shaona Wang ; Shili Zheng ; Yi Zhang
• 刊名：Journal of Chemical & Engineering Data
• 出版年：2013
• 出版时间：March 14, 2013
• 年：2013
• 卷：58
• 期：3
• 页码：677-681
• 全文大小：277K
• 年卷期：v.58,no.3(March 14, 2013)
• ISSN：1520-5134

文摘

The effective separation of K₃VO₄ and K₂CO₃ from KOH鈥揔₂CO₃鈥揔₃VO₄鈥揌₂O system plays an important role in a new vanadium production process developed by the Institute of Process Engineering, Chinese Academy of Sciences. In order to design an effective separation strategy, the dissolution behavior of K₃VO₄ and K₂CO₃ in KOH鈥揔₂CO₃鈥揔₃VO₄鈥揌₂O system at (313.15 and 353.15) K was investigated, and the solubility isotherms were plotted. In addition, the solubility of K₃VO₄ in KOH solutions was compared with that in K₂CO₃ saturated KOH solutions, and the solubility of K₂CO₃ in KOH solutions was also compared with that in K₃VO₄ saturated KOH solutions. From the solubility data analysis, a method of first separation K₂CO₃ via cooling crystallization followed by separation K₃VO₄ via cooling crystallization in the concentrated alkaline solution was proposed.