Oxidative synthesis method of glyoxylate
A technology for glyoxylate and oxidation synthesis, which is applied in chemical instruments and methods, preparation of carboxylic acid esters, preparation of organic compounds, etc., and can solve problems such as high reaction temperature and low yield of glyoxylate
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Embodiment 1
[0020] Weigh 6g of a β-type molecular sieve catalyst with a silicon-aluminum ratio of 5 in a fixed-bed reactor, using NO, air and methyl glycolate as raw materials, wherein the molar ratio of NO to the oxygen contained in the air is 6, and the oxygen and ethanol in the air The molar ratio of methyl glycolate is 0.8, the reaction temperature is 80°C, the reaction pressure is 0.2MPa, and the mass space velocity of methyl glycolate is 1h -1 Under the condition of contact with the catalyst, the product is condensed after the reaction, the gas and liquid are separated, and the liquid phase is sampled and analyzed. The reaction results are shown in Table 1.
Embodiment 2
[0022] According to the reaction conditions of [Example 1], only the catalyst is changed to a β-type molecular sieve catalyst containing 0.0005% P with a silicon-aluminum ratio of 5. That is, weigh 6g of a β-type molecular sieve catalyst containing 0.0005% P with a silicon-aluminum ratio of 5 and place it in a fixed-bed reactor, using NO, air and methyl glycolate as raw materials, wherein the molar ratio of NO to oxygen contained in the air is 6 , the molar ratio of oxygen and methyl glycolate in the air is 0.8, at a reaction temperature of 80°C, a reaction pressure of 0.2MPa, and a mass space velocity of methyl glycolate of 1h -1 Under the condition of contact with the catalyst, the product is condensed after the reaction, the gas and liquid are separated, and the liquid phase is sampled and analyzed. The reaction results are shown in Table 1.
Embodiment 3
[0024] According to the reaction conditions of [Example 1], only the catalyst is changed to a β-type molecular sieve catalyst containing 0.05% P with a silicon-aluminum ratio of 5. That is, weigh 6g of a β-type molecular sieve catalyst containing 0.01% P with a silicon-aluminum ratio of 5 and place it in a fixed-bed reactor, using NO, air and methyl glycolate as raw materials, wherein the molar ratio of NO to oxygen contained in the air is 6 , the molar ratio of oxygen and methyl glycolate in the air is 0.8, at a reaction temperature of 80°C, a reaction pressure of 0.2MPa, and a mass space velocity of methyl glycolate of 1h -1 Under the condition of contact with the catalyst, the product is condensed after the reaction, the gas and liquid are separated, and the liquid phase is sampled and analyzed. The reaction results are shown in Table 1.
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