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Hydroformylalion of 1-heptene catalyzed by homogeneous and heterogeneous Ru3(CO)12 catalyst has been investigated. Ru3(CO)12 almost has no activity when the reaction temperature is below 60℃, and nearly stable activity when over 100℃. The maximum selectivity for aldehyde is obtained at 120℃ and V/I values of aldehyde and alcohol decrease rapidly with increasing temperature. Supported Ru3(CO)12 catalysts modified with NaBH4 or KOH have higher activity and selectivity for aldehyde. Compared with supported Ru3(CO)12 catalysis, Ru3(CO)12/Co2(CO)g/γ-Al2O3 has high activity and selectivity. When PPh3 or (NKt4)Cl is added to the reaction system, the selectivity for aldehyde and the .N/I ratio increase. The FT-IR spectra of catalysts alter reaction show that Ru3(CO)12 is transformed to a hydrocarbonyl complex [HRu3(CO)11]-, and (NEt4)Cl promotes the formation of |HRu3(CO)11|- and stabilizes it.
Hydroformylalion of 1-heptene catalyzed by homogeneous and heterogeneous Ru3 (CO) 12 catalyst has been investigated. Ru3 (CO) 12 has almost no activity when the reaction temperature is below 60 ℃, and nearly stable activity when over 100 ℃. Compared Ru Ru (CO) 12 with modified Ru3 (CO) 12 catalysts Modified with NaBH4 or KOH with higher activity and selectivity for aldehyde. catalysis, Ru3 (CO) 12 / Co2 (CO) g / γ-Al2O3 has high activity and selectivity. When PPh3 or (NKt4) Cl is added to the reaction system, the selectivity for aldehyde and the. The FT-IR spectra of catalysts alter reaction show that Ru3 (CO) 12 is transformed to a hydrocarbonyl complex [HRu3 (CO) 11] -, and (NEt4) Cl promotes the formation of | HRu3 (CO) 11 | it