Nickel catalyst, preparation method thereof and synthesis method of pyrimidine derivative
The technology of a nickel catalyst and synthesis method, which is applied in the field of synthesis of pyrimidine derivatives, can solve the problems of low yield, poor environmental protection, and high cost of pyrimidine derivatives, so as to improve selectivity and catalytic efficiency, and improve yield and purity Effect
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[0030] Another aspect of the present application also provides a preparation method of the nickel catalyst provided by the present application. The preparation method of the nickel catalyst includes: in the presence of a carrier, a soluble nickel salt and an aqueous alkaline solution are subjected to a precipitation reaction, so that the precipitation reaction The product is loaded in the carrier to obtain a precursor; the precursor is calcined to obtain a nickel catalyst.
[0031] In the above preparation method, during the precipitation reaction, the nickel ions react with the alkaline substance in the alkaline aqueous solution to form a precipitate (the composition of the precipitate varies according to the type of the alkaline reagent). Since the carrier used has a relatively high specific surface area, the above-mentioned precipitates will be adsorbed in the carrier. The precipitate is then decomposed by a roasting process to form nickel oxide.
[0032] In a preferred em...
Embodiment 1-1
[0052] The preparation method of nickel oxide-loaded activated carbon is as follows: add 30g of nickel chloride to a 500ml three-necked bottle, add 200g of water and stir to dissolve, then add 200g of activated carbon (200-250 mesh, specific surface area is 1800m 2 / g), then add 150g of 20% sodium carbonate aqueous solution, stir and react at 55±5°C for 3 hours, cool down, filter, wash with deionized water twice, dry, and decompose and activate at a high temperature of 400°C to obtain 210g of nickel oxide loaded activated carbon Catalyst, the loading capacity of nickel oxide is 7.5%, denoted as catalyst A1, specific surface area 2500m 2 / g.
Embodiment 1-2
[0054] The difference from Example 1-1 is that the carrier is diatomaceous earth.
[0055] Nickel oxide supported diatomite catalyst, the loading capacity of nickel oxide is 6.3%, recorded as catalyst A2, the specific surface area is 110m 2 / g.
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