Dimethyl carbonate supported catalyst directly synthesized by methanol and carbon dioxide
A supported catalyst, the technology of dimethyl carbonate, is applied in the preparation of carbon dioxide or inorganic carbonate, metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, etc., and can solve the difference in catalytic effect. , unstable catalytic performance, easy deactivation and other problems, to achieve the effect of simple preparation steps and use methods, easy recovery and reuse, and inhibition of agglomeration
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Embodiment 1
[0025] Weigh 30 g of 300-mesh white-gray refined diatomite carrier with an electronic balance, soak it in 5% dilute hydrochloric acid, stir and wash for 24 hours. Then it was washed with deionized water until neutral, and dried at 120°C for 10 hours.
[0026] Use an electronic analytical balance to accurately weigh 5g of the above-mentioned processed diatomite carrier, 0.3110gNi(NO 3 ) 2 ·6H 2 O, 0.5165g Cu(NO 3 ) 2 ·3H 2 O, 30mL of 25% ammonia water were all placed in a 150mL single-necked round-bottomed flask, stirred at room temperature for 24 hours, then ultrasonically dispersed for 3 hours, then evaporated to dryness at 70°C, dried at 100°C for 12 hours, ground and dried at 300°C Mesh sieve. Finally, it was calcined in a muffle furnace at 350°C for 3 hours, and in a tube reduction furnace under 5% H 2 / 95%N 2 Reductive activation at 600°C for 1 hour.
[0027] Weigh 2.5g of the above-mentioned reduction-activated catalyst and load it on the catalytic bed of the MR...
Embodiment 2
[0029] As in Example 1, but diatomaceous earth, Ni(NO 3 ) 2 ·6H 2 O, Cu(NO 3 ) 2 ·3H 2 The amount of O added was 5g, 0.6220g and 1.0330g respectively; the catalyst bed temperature in the catalytic process was 130°C.
Embodiment 3
[0031] As in Example 1, but diatomaceous earth, Ni(NO 3 ) 2 ·6H 2 O, Cu(NO 3 ) 2 ·3H 2 The amount of O added was 5g, 0.9330g and 1.5495g respectively; the catalyst bed temperature in the catalytic process was 140°C.
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