醇醛物质的量比对不饱和醛催化氢转移反应的影响

摘要

The influence of isopropanol/citral ratio on the reaction rate of citral and isopropanol hydrogen transfer reaction catalyzed by ZrO2/SiO2 was investigated. The results showed that the boiling point of reaction mixtures lowered with the increase of isopropanol/citral ratio under the experimental condition.The conversion of citral and selectivity to aim product were obviously influenced by isopropanol/citral ratio.The change of boiling point caused by the change of isopropanol/citral ratio could be the main influencing factor of the reaction rate. The optimum isopropanol/citral mole ratio of 5 and the experimental apparent activation energy of 100.5 kJ · mol -1 were attained.%探讨了ZrO2/SiO2催化柠檬醛和异丙醇的氢转移反应醇醛物质的量比对反应速率的影响.结果表明,实验条件下,反应混合物的沸点随醇醛物质的量比的增大而降低;柠檬醛转化率和目标产物选择性明显受醇醛物质的量比的影响,醇醛物质的量比变化导致混合物沸点的改变可能是影响反应速率的主要因素.研究条件下,反应最适宜的醇醛物质的量比为5,表观活化能为100.5 kJ·mol-1.