A method of preparing a catalyst for producing acrolein by oxidation of propylene at high space velocity, said catalyst is a Mo—Bi—Fe—Co based composite metal oxide. Producing unsaturated aldehyde via partial oxidation of lower unsaturated olefin at high space velocity using said catalyst is suitable for process with or without off-gas recirculating. Said catalyst is prepared by co-precipitation, the reaction conditions for using said catalyst to produce unsaturated aldehyde are, the space velocity of unsaturated lower olefin relative to catalyst being 120˜200 h-1(STP), reaction temperature being 300˜420° C. and absolute pressure being 0.1˜0.5 MPa; a single-stage unsaturated lower olefin conversion ratio of greater than 98.0% and carbon oxide yield of less than 3.3% with an overall yield of unsaturated lower aldehyde and acid of greater than 94.0% are obtained. The process to prepare the said catalyst is simple, easy to be repeated, and capable of industrial scale-up.
一种制备催化剂的方法,用于在高空间速度下氧化
丙烯生产
丙烯醛,该催化剂是一种Mo-Bi-Fe-Co基复合金属氧化物。使用该催化剂通过低不饱和烯烃的部分氧化在高空间速度下生产不饱和醛,适用于带或不带废气回收的工艺。该催化剂是通过共沉淀法制备的,使用该催化剂生产不饱和醛的反应条件是,不饱和低级烯烃相对于催化剂的空间速度为120-200 h-1(STP),反应温度为300-420°C,绝对压力为0.1-0.5 MPa;单级不饱和低级烯烃转化率大于98.0%,碳氧化物产率小于3.3%,总产率不饱和低级醛和酸大于94.0%。制备该催化剂的工艺简单,易于重复,并能够工业化规模化生产。