Heterogeneous catalysts for alkene hydroformylation reaction and preparation method thereof
A technology of olefin hydroformyl and catalyst, which is applied in the field of preparation of supported metal catalysts, can solve problems such as loss of ligands, loss of ligands and metals, lack of coordination effect, etc., and achieve the effect of improving activity
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Embodiment 1
[0031] Take 5.0g of silica gel, cook for 10 hours, dry at 393K, and set aside. RhCl with a Rh content of 1wt% was prepared separately 3 10.0ml of aqueous solution and Al(NO 3 ) 3 10.0ml aqueous solution, impregnated the above silica gel with these two aqueous solutions at the same time, baked in an oven at 393K for 12 hours after natural drying, then baked in a muffle furnace at 573K for 4 hours, and finally heated it with H at 393K 2 After 4 hours of reduction, 1Rh1Al / SiO with both Rh loading and Al loading at 1wt% was obtained 2 catalyst.
[0032] Take 0.034g of 2-(diphenylphosphine)propyltriethoxysilane and dissolve it in 3.0ml of toluene. Add 0.30g of 1Rh1Al / SiO prepared above 2 catalyst, and then the mixture was stirred at room temperature for 15 hours, and then stirred at reflux for 6 hours in a 383K oil bath. Finally, the refluxed mixture was naturally cooled to room temperature and the solvent was vacuum-extracted at room temperature to obtain DPPPTS-1Rh1Al / SiO ...
Embodiment 2
[0034] Take 5.0g of silica gel, cook for 10 hours, dry at 393K, and set aside. RhCl with a Rh content of 1wt% was prepared separately 3 Aqueous solution 10.0ml and AgNO with Ag content 1wt% 3 10.0ml aqueous solution, impregnated the above silica gel with these two aqueous solutions at the same time, baked in an oven at 393K for 12 hours after natural drying, then baked in a muffle furnace at 573K for 4 hours, and finally heated it with H at 393K 2 After reduction for 4 hours, 1Rh1Ag / SiO with both Rh loading and Ag loading at 1wt% was obtained 2 catalyst.
[0035] Take 0.034g of 2-(diphenylphosphine)propyltriethoxysilane and dissolve it in 3.0ml of toluene. Add 0.30g of 1Rh1Ag / SiO prepared above 2 catalyst, and then the mixture was stirred at room temperature for 15 hours, and then stirred at reflux for 6 hours in a 383K oil bath. Finally, the refluxed mixture was naturally cooled to room temperature and the solvent was vacuum-extracted at room temperature to obtain DPPPTS...
Embodiment 3
[0037] Take 5.0g of silica gel, cook for 10 hours, dry at 393K, and set aside. RhCl with a Rh content of 1wt% was prepared separately 3 Aqueous solution 10.0ml and CuCl with Cu content 1wt% 2 10.0ml aqueous solution, impregnated the above silica gel with these two aqueous solutions at the same time, baked in an oven at 393K for 12 hours after natural drying, then baked in a muffle furnace at 573K for 4 hours, and finally heated it with H at 393K 2 After 4 hours of reduction, 1Rh1Cu / SiO with both Rh loading and Cu loading at 1wt% was obtained 2 catalyst.
[0038] Take 0.034g of 2-(diphenylphosphine)propyltriethoxysilane and dissolve it in 3.0ml of tetrahydrofuran. Add 0.30g of 1Rh1Cu / SiO prepared above 2 catalyst, and then the mixture was stirred at room temperature for 15 hours, and then stirred at reflux for 6 hours in a 383K oil bath. Finally, the refluxed mixture was naturally cooled to room temperature and the solvent was vacuum-extracted at room temperature to obtain...
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