Process for Recycling Tungsten from the Leach Solution of Organic Oxidation Reaction Systems

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• 作者：Changming Ye ; Peng Jin ; Junxia Liu ; Yiqiang Wen ; Huijuan Wei ; Xiaoguang Zheng ; Xiangyu Wang ; Baojun Li
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2013
• 出版时间：March 13, 2013
• 年：2013
• 卷：52
• 期：10
• 页码：3600-3606
• 全文大小：263K
• 年卷期：v.52,no.10(March 13, 2013)
• ISSN：1520-5045

文摘

Recovering tungsten from the leach solution of adipic acid (ADA) synthesis by oxidizing cyclohexene over tungsten peroxide catalyst is a problem. Herein, a novel process is explored to recover tungsten and recycle catalyst in this production process. The reaction mother liquor of ADA synthesis was treated with triethylamine, and the tungsten peroxide decomposed to tungsten. The acidification of mother liquor with HNO₃ leads to precipitation of tungsten in the form of H₂WO₄. The component of recovered reagent was characterized by X-ray diffraction (XRD) and Fourier transform infrared (FT-IR) spectroscopy. A tungsten recovery of 97% was achieved. The regenerated catalyst was prepared from recovered tungsten. The regenerated catalyst provided a yield of ADA of 94.1%, which is comparable to the 94.5% yield of ADA with fresh catalyst. The effective recovery of tungsten and the excellent performance of regenerated catalyst show that an effective recovery approach has been developed.