Ethylidene diacetate catalyst and preparation method thereof
A technology of ethylene diacetate and catalyst, applied in chemical instruments and methods, catalysts for physical/chemical processes, carbon monoxide or formate reaction preparation, etc., can solve the problem of low yield and low selectivity of ethylene diacetate , the problem of high selectivity of ethylene diacetate, to achieve the effect of improving activity and stability, improving yield and selectivity
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Embodiment 1
[0023] Preparation of catalyst: Pd(OAc) containing 5.12gPd, containing 2.56gCe and containing 1.39gSb 2 、Ce(OAc) 3 ·5H 2 O and antimony trioxide are fully mixed and dissolved in dilute nitric acid to obtain 500ml of impregnation solution, and 1.0L of spherical SiO with a diameter of 5.6mm 2 The carrier was immersed in the above impregnating solution, and dried at 100°C for 2 hours. 2 The catalyst was obtained by raising the temperature to 500° C. and calcining for 4 h in the atmosphere.
[0024] Synthesis of diethylene acetate: Add 1.5mol acetic acid, 0.05mol catalyst and 0.45mol methyl acetate into a 1.5L titanium reactor, first use argon to exhaust the air in the kettle, then pressurize to 2.0MPa, and then introduce carbon monoxide And hydrogen until the pressure is 8.0MPa, increase the stirring speed to 1500rpm, while stirring and heating to the reaction temperature, control the reaction temperature to 186°C, the molar ratio of carbon monoxide to hydrogen is 2:1, conti...
Embodiment 2
[0047] Preparation of catalyst: PdCl containing 3.05gPd, 1.05gCe and 0.60gSb 2 , Ce(NO 3 ) 3 ·6H 2 O and Cl 5 Sb was fully mixed and dissolved in dilute hydrochloric acid to obtain 500ml of impregnating solution. Immerse 1.0L of activated carbon carrier in the above impregnating solution, let it stand for 2 hours, dry at 80°C, and heat up to 400°C for 4 hours in a He atmosphere to obtain the catalyst.
[0048] Synthesis of diethylene acetate: Add 1.5mol acetic acid, 0.05mol catalyst and 0.45mol methyl acetate into a 1.5L titanium reactor, first use argon to discharge the air in the kettle, then pressurize to 1.0MPa, and then introduce carbon monoxide And hydrogen until the pressure is 2.0MPa, increase the stirring speed to 1500rpm, while stirring and heating to the reaction temperature, control the reaction temperature to 130°C, the molar ratio of carbon monoxide to hydrogen is 1:10, continue the reaction for 3.0h, then stop the reaction.
[0049] Product analysis: The re...
Embodiment 3
[0052] Preparation of catalyst: Pd(NO 3 ) 2 2H 2 O, Ce 2 o 3 and Sb 2 (SO 4 ) 3 Fully mixed and dissolved in dilute nitric acid to obtain 500ml of impregnation solution, 1.0L Al 2 o 3 The carrier was immersed in the impregnating solution, left to stand for 2 hours, dried at 120° C., and then calcined at 600° C. for 4 hours in an Ar atmosphere to obtain the catalyst.
[0053] Synthesis of diethylene acetate: Add 1.5mol acetic acid, 0.05mol catalyst and 0.45mol methyl acetate into a 1.5L titanium reactor, first use argon to exhaust the air in the kettle, then pressurize to 2.0MPa, and then introduce carbon monoxide And hydrogen until the pressure is 10..0MPa, increase the stirring speed to 1500rpm, while stirring and heating to the reaction temperature, control the reaction temperature to 200°C, the molar ratio of carbon monoxide to hydrogen is 10:1, continue the reaction for 10.0h, stop the reaction.
[0054] Product analysis: The reaction mixture obtained from the ab...
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