Method for preparing octanal from octenal

The invention relates to the technical field of octanol preparation, and discloses a method for preparing octanal from octenal, and the method comprises the following steps: in the presence of a catalyst, octenal is contacted with hydrogen to carry out hydrogenation reaction; wherein the catalyst is prepared by the following steps: (1) providing alumina microspheres, the particle diameter of which is 200-800 [mu] m, and the coefficient of variation of which is 3-8%; (2) mixing the alumina microspheres with sugar, and carbonizing to obtain a carrier; and (3) loading the transition metal active component on the carrier. By adopting the method for preparing octanal, the conversion rate of octenal and the selectivity of octanal can be improved. 本发明涉及制备辛醇的技术领域，公开了一种由辛烯醛制备辛醛的方法，该方法包括：在催化剂的存在下，使辛烯醛与氢气接触发生加氢反应；其中，所述催化剂由以下方式制备得到：(1)提供氧化铝微球，所述氧化铝微球的颗粒直径为200-800μm，变异系数为3-8％；(2)将氧化铝微球与糖混合进行碳化，得到载体；(3)将过渡金属活性组分负载在载体上。采用本发明的方法制备辛醛，可以提高辛烯醛转化率和辛醛的选择性。