草酸氧钒制取试验研究

Experimental Study on Preparation of Vanadyl Oxalate

以五氧化二钒和草酸为原料,制备了高品质草酸氧钒。研究了反应温度、反应时间和草酸配加系数对草酸氧钒溶液品质及反应过程的影响。结果表明：液固反应体系中,草酸与五氧化二钒质量配比2∶1,反应温度50~60℃的条件下,可制得满足技术目标的草酸氧钒溶液。使用XRD、SEM及EDS对草酸氧钒固体进行了表征,衍射图谱与VOC2O4·5H2O基本吻合,原辅料满足草酸中Na含量小于0.01%等条件时,可制得高品质草酸氧钒。

Vanadyl oxalate with high quality was prepared using vanadium pentoxide and oxalic acid as raw materials, and the effects of reaction temperature and time, and adding coefficient of oxalic acid on thequality of vanadyl oxalate solution and reaction process were investigated. The results show that vanadyl oxalate solution satisfying the technical targets can be obtained under the following conditions： 2 ： 1 ofmass ratio for oxalic acid to vanadium pentoxide and 50 - 60 ℃ of reaction temperature. The vanadyl oxalate solid was characterized by XRD ,SEM and EDS. It is indicated that the XRD pattern fits well with that of VOC2O4 · 5H2O, and vanadyl oxalate with high quality can be p, repared when the content of Na forraw materials is less than 0.01%.