采用HTLcs前驱体制备的丙酮一步法制MIBK催化剂

Catalyst derived from HTLcs for one-step synthesis of methyl isobutyl ketone from acetone

采用共沉淀法制备Cu Mg A1三元类水滑石,进而煅烧得到CuO MgO Al2O3催化剂用于丙酮加氢一步合成甲基异丁基酮(MIBK)反应。研究了催化剂活性组分配比及反应条件对转化率和选择性的影响,经筛选得到催化剂体系的最佳组成为:n(Cu)∶n(Mg)∶n(Al)=4∶16∶10,适宜的反应条件为:温度240℃,n(H2)∶n(丙酮)=2.5,液空速为4.8mL/h·g,在该条件下丙酮转化率达73.88%,MIBK选择性达55.23%。

Cu-Mg-A1 hydrotalcite-like compounds were prepared by coprecipitation,and then CuO-MgO-Al_2O_3 catalyst for one-step synthesis of methyl isobutyl ketone from acetone and hydrogen at atmospheric pressure were obtained by calcining Cu-Mg-A1 hydrotalcite-like compounds.The influence of catalyst composition and reaction condition on the conversion of acetone and selectivity of MIBK was investigated.It was found that the best catalyst composition was n(Cu)∶n(Mg)∶n(Al)=4∶16∶10 and the conversion of acetone was 73.88%and that the selectivity of MIBK was 55.23% at the optimum reaction conditions of temperature 240?℃,H_2/acetone molar ratio 2.5 and liquid space velocity 4.8?mL acetone/h·g.