Carbon Monoxide Vapor Phase Synthesis of Oxalate Catalyst
A carbon monoxide, gas phase synthesis technology, applied in the direction of carbon monoxide or formate reaction preparation, physical/chemical process catalyst, metal/metal oxide/metal hydroxide catalyst, etc., can solve the problem of oxalate conversion rate of nitrite Low yield, low catalyst activity and other problems, to achieve the effect of improving utilization rate and catalytic activity, good dispersion and high adsorption ratio
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Embodiment 1
[0030] Take 60 g of the alumina support calcined at 1100° C. for 4 hours. Dissolve 0.3 g of palladium chloride in 30 ml of deionized water containing 0.1% fatty alcohol polyoxyethylene ether phosphate, add sodium carbonate after dissolving to adjust the pH to 4.0 to obtain impregnation solution I. Slowly add the impregnating solution I into the carrier, and turn the carrier to make the solution impregnate evenly, so as to prepare the catalyst precursor. The catalyst precursor is aged in the air for 20 hours, then dried at 80°C, then roasted in a muffle furnace at 450°C, and then placed in a reactor where the temperature is programmed to rise to 300°C and reduced by hydrogen for 8 hours to obtain carbon monoxide gas-phase synthesis of oxalate Catalyst cat-1A.
[0031] See Table 1 for the palladium dispersion, palladium grain average particle size, and carbon monoxide adsorption test results of the analytical test catalyst.
Embodiment 2
[0033] Take 60 g of the alumina support calcined at 1100° C. for 4 hours. Dissolve 0.3 g of palladium chloride in 30 ml of deionized water containing 0.1% fatty alcohol polyoxyethylene ether phosphate, add sodium carbonate after dissolving to adjust the pH to 2.0 to obtain impregnation solution I. Slowly add the impregnating solution I into the carrier, and turn the carrier to make the solution impregnate evenly, so as to prepare the catalyst precursor. The catalyst precursor is aged in the air for 20 hours, then dried at 80°C, then roasted in a muffle furnace at 450°C, and then placed in a reactor where the temperature is programmed to rise to 300°C and reduced by hydrogen for 8 hours to obtain carbon monoxide gas-phase synthesis of oxalate Catalyst cat-2A.
[0034] See Table 1 for the palladium dispersion, palladium grain average particle size, and carbon monoxide adsorption test results of the analytical test catalyst.
Embodiment 3
[0036] Take 60 g of the alumina support calcined at 1100° C. for 4 hours. Dissolve 0.3 g of palladium chloride in 30 ml of deionized water containing 0.01% fatty alcohol polyoxyethylene ether phosphate, add sodium carbonate after dissolving to adjust the pH to 4 to obtain impregnation solution I. Slowly add the impregnating solution I into the carrier, and turn the carrier to make the solution impregnate evenly, so as to prepare the catalyst precursor. The catalyst precursor is aged in the air for 20 hours, then dried at 80°C, then roasted in a muffle furnace at 450°C, and then placed in a reactor where the temperature is programmed to rise to 300°C and reduced by hydrogen for 8 hours to obtain carbon monoxide gas-phase synthesis of oxalate Catalyst cat-3A.
[0037] See Table 1 for the palladium dispersion, palladium grain average particle size, and carbon monoxide adsorption test results of the analytical test catalyst.
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