- 作者: 蕭欣怡,柯安男
- 作者服務機構: Department of Chemistry, Tunghai University, Taichung, Taiwan, R.O.C.
- 中文摘要: 3-(4-Isopropyl-phenyl)-2-methyl-acrylaldehyde (4IP2MA) was synthesized from propionaldehyde (PA) and para-isopropylbenzaldehyde (IPB) via cross aldol condensation over alkaline earth metal oxides or Al2O3-MgO mixed oxides (AM) at 120-190 °C by using a batch reactor. The catalytic activity is enhanced with the base amounts of both alkaline earth metal oxides and the mixed oxides. The reaction system is free of diffusional limitation at a stirring speed larger than 600 rpm. Increasing the catalyst weight, reaction temperature, reaction time and IPB/PA mol ratio enhances the PA conversion, whereas the 4IP2MA selectivity remains small change except for IPB/PA ratio. Favorable results occur on the PA conversion and the 4IP2MA selectivity for the reaction in nonpolar solvents of cyclohexane and benzene. Reused catalysts of MgO and AM exhibit no catalyst decay. For the formation of 4IP2MA, the reaction mechanism is proposed and the apparent activation energy is calculated.
- 英文摘要: --
- 中文關鍵字: 3-(4-Isopropyl-phenyl)-2-methyl-acryaldehyde; Hydrotalcite; Alkaline earth metal oxide; Para-Isopropylbenzaldehyde; Propionaldehyde.
- 英文關鍵字: --