Catalyst for synthesizing glycol from hydrogenation of methyl glycolate, and preparation method and application thereof
A technology of methyl glycolate and catalyst, which is applied to a catalyst for synthesizing ethylene glycol by hydrogenation of methyl glycolate, a preparation method and an application field, can solve the problems of long process flow and high cost of raw materials in the production process of oxalate, and achieve stable catalyst stability. Good performance, simple preparation method and low production cost
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Embodiment 1
[0018] Weigh 6.20 g of copper nitrate and 2.7 g of nickel nitrate respectively, add the above salts into deionized water, and impregnate 16 g of zirconia in equal volume. The zirconia impregnated with the solution was placed at room temperature for 4 h, dried at 35 °C for 3 h, dried at 110 °C for 7 h, and calcined at 500 °C for 5 h. The obtained sample was subjected to a space velocity of 6000 h -1 , H at a pressure of 0.5 MPa 2 Under the atmosphere, the temperature was raised to 400 °C at a rate of 3 ml / min, and the temperature was maintained for 4 h. After the sample temperature dropped to room temperature, the O 2 0.5% O by volume 2 / N 2 at 1800h -1 Passivation at space velocity for 3 h. The obtained catalyst has a copper percentage of 9.0 wt%, a nickel percentage of 3.0 wt%, and a carrier zirconia of 88.0 wt%.
[0019] 2 ml of the above-mentioned catalyst was loaded into a fixed-bed tubular reactor. The catalyst was placed at a space velocity of 3500 h -1 , H at...
Embodiment 2
[0021] Weigh 11.52 g of copper nitrate and 0.83 g of manganese nitrate respectively, add the above salts into deionized water, and impregnate 12 g of silicon dioxide in equal volume. The silica impregnated with the solution was left at room temperature for 3 h, dried at 50 °C for 5 h, dried at 110 °C for 8 h, and calcined at 400 °C for 6 h. The obtained sample was subjected to a space velocity of 5000 h -1 , H at a pressure of 0.9 MPa 2 Under the atmosphere, the temperature was raised to 450 °C at a rate of 0.5 ml / min, and the temperature was maintained for 6 h. After the sample temperature dropped to room temperature, the O 2 1.0% O by volume 2 / N 2 at 1500h -1 Passivation at space velocity for 2 h. The obtained catalyst has a copper percentage of 20.0 wt%, a manganese percentage of 1.2 wt%, and a carrier silica of 78.8 wt%.
[0022] 2 ml of the above-mentioned catalyst was loaded into a fixed-bed tubular reactor. The catalyst was placed at a space velocity of 4000 ...
Embodiment 3
[0024] Weigh 10.80 g of copper nitrate and 0.94 g of cobalt nitrate respectively, add the above salts into deionized water, and impregnate 16 g of zirconia in equal volume. The zirconia impregnated with the solution was left at room temperature for 5 h, dried at 60 °C for 3 h, dried at 120 °C for 6 h, and calcined at 600 °C for 3 h. The obtained sample was subjected to a space velocity of 3500 h -1 , H at a pressure of 0.5 MPa 2 Under the atmosphere, the temperature was raised to 500 °C at a rate of 2 ml / min, and the temperature was maintained for 3 h. After the sample temperature dropped to room temperature, the O 2 1.5% O by volume 2 / N 2 at 2000h -1 Passivation at space velocity for 3 h. The obtained catalyst has a copper percentage of 15.0 wt%, a cobalt percentage of 1.0 wt%, and a carrier zirconia of 84.0 wt%.
[0025] 2 ml of the above-mentioned catalyst was loaded into a fixed-bed tubular reactor. The catalyst was placed at a space velocity of 3000 h -1 , H a...
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