采用共沉淀法公斤级放大制备2批基于Mo-Bi复合氧化物选择氧化生产甲基丙烯醛的催化剂。X射线衍射光谱、傅里叶红外光谱等表征结果表明，所制备催化剂与少剂量合成催化剂具有几乎相同的物化性质；2批催化剂在不同反应温度下的性能评价结果表明，二者也表现出类似的催化活性，由此可见该催化剂放大制备效应不明显，具有优良的可重复性。最后对催化剂进行中试装置长周期性能评价，结果表明，在320~380℃内，虽然催化剂床层热点随预设温度发生移动，但目的产物甲基丙烯醛收率一直保持在83%~93%，催化剂具有优良的温度操作弹性，该催化剂具有良好的工业前景。

Two batches of catalysts for selective oxidation to produce methacrolein are prepared in a kilogram scale by coprecipitation method based on Mo-Bi composite oxides.The characterization results by X-ray diffraction and Fourier transform infrared spectroscopy indicate that the prepared catalysts have almost the same physicochemical properties as the catalyst that is prepared in an experiment scale.The performance evaluation for two batches of catalysts at different reaction temperatures shows that all catalysts exhibit similar catalytic activity,indicating there are no obvious scale-up effects in the amplification preparation process and there is excellent reproducibility.Finally,a long period of performance evaluation is carried out for the catalysts.It is shown that the yield of the target product methacrolein has always remained between 83% and 93% in the temperature range of 320-380℃,although the hot spot of the catalyst bed moves with the preset temperature.It is proved that the catalyst has an excellent temperature operating flexibility,representing a good industrial prospect.

王国梁(1992-),男,硕士生