低温固相反应法制备碱式碳酸锆

Zirconium basic carbonate preparation by low-temperature solid-phase reaction method

采用氧氯化锆和碳酸钠为原料进行低温固相反应,得到碱式碳酸锆钠前驱物,前驱物经过加稀盐酸和除杂后得到碱式碳酸锆。对碱式碳酸锆进行了红外光谱分析,并通过条件实验,研究了球磨时间、球磨转速对产物粒度和调酸pH对产物杂质含量的影响.结果表明:在对原料采用锆珠球磨、球磨转速150 r/min、球磨时间为2 h,对前驱物调酸除杂pH值稳定在3.9～4.1的最佳工艺条件下,制备的碱式碳酸锆产品平均粒度大约11μm,粒度分布均匀、分散性好、活性强、纯度高.

Sodium zirconium basic carbonate precursor is prepared using zirconyl chloride and sodium carbonate as raw materials by low-temperature solid-phase reaction. Zirconium basic carbonate ＇s men produced by adding dilute hydrochloric acid and cleaning on the precursor. This paper studies the effects of milling time and milling speed on the product granularity by performing infrared spectroscopy on the zirconium basic carbonate. The effect of acid pH degree on the product impurity content is also studied. The results show that the average particle size of zirconium basic carbonate products is around 11 Ixm with characteristics of uniform particle size distribution, good dispersion, strong activity and high purity under the optimal technical conditions （zirconium beads milling, milling speed with 150 r/min, milling time for 2 h, acid pH value amounting to 3.9-4.1）.