中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | 3-methy-2-butene-1-al diisopentenyl acetal | —— | C15H26O2 | 238.37 |
Ga2O3 doped sulfonated tin oxide catalysts were prepared via co-condensation method in ethanol solvent, followed by sulfonation and calcination. The samples were characterized by isothermal nitrogen adsorption/desorption, powder X-ray diffraction (XRD), thermal gravimetric analysis (TG), Raman spectra and DRIFT spectra. The number of acid sites on the catalysts was measured with the potentiometric titration of butyl amine. The results showed that the addition of small amounts of Ga2O3 to sulfonated tin oxide resulted in an enhanced acid site density, which makes Ga2O3 doped sulfonated tin oxide catalysts highly active for aldol reactions. The catalyst containing 1.5% Ga2O3 exhibited much higher activity than those of SO42−/SnO2, SO42−/ZrO2 and H3PO4 in aldol condensation of prenal and prenol for citral precursor, which is a important in fragrance industry. Besides the high activity, the catalyst also exhibited good recyclability, making 1.5% GST an efficient and promising solid catalyst for aldol reactions.