Method for synthesizing alkyl nitrite
A technology for synthesizing alkyl nitrite and alkyl nitrite, which is applied in the fields of nitrite preparation and organic chemistry, and can solve the problems of low selectivity of alkyl nitrite and high amount of nitric acid produced by reaction
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Embodiment 1
[0034] Such as figure 1 As shown, the reaction raw materials NO and N 2 It enters the tower reactor with packing from 3, methanol enters from 2, oxygen enters from 1, and reacts with NO and methanol through the α-alumina ceramic membrane oxygen distributor with a membrane pore size of 0.48 μm. The height of the ceramic membrane distributor 10% of the reactor height. At a reaction temperature of 50°C, a reaction pressure of 0.1 MPa, a molar ratio of methanol to NO of 10:1, a molar ratio of NO to oxygen of 6:1, and a residence time of reactants of 15 seconds, the reaction produces methyl nitrite. The nitric acid content of the product was determined to be 11 ppm after condensation and gas-liquid separation, and the selectivity of methyl nitrite was 99.6%.
Embodiment 2
[0036] Such as figure 1 As shown, the reaction raw materials NO and N 2It enters the tower reactor with packing from 3, methanol enters from 2, oxygen enters from 1, and reacts with NO and methanol through the α-alumina ceramic membrane oxygen distributor with a membrane pore size of 0.48 μm. The height of the ceramic membrane distributor 10% of the reactor height. At a reaction temperature of 50°C, a reaction pressure of 0.1 MPa, a molar ratio of methanol to NO of 1:1, a molar ratio of NO to oxygen of 6:1, and a residence time of reactants of 15 seconds, methyl nitrite was produced. The nitric acid content of the product was determined to be 46 ppm after condensation and gas-liquid separation, and the selectivity of methyl nitrite was 99.2%.
Embodiment 3
[0038] Such as figure 1 As shown, the reaction raw materials NO and N 2 It enters the tower reactor with packing from 3, methanol enters from 2, oxygen enters from 1, and reacts with NO and methanol through the α-alumina ceramic membrane oxygen distributor with a membrane pore size of 0.48 μm. The height of the ceramic membrane distributor 10% of the reactor height. At a reaction temperature of 50°C, a reaction pressure of 0.1 MPa, a molar ratio of methanol to NO of 1.1:1, a molar ratio of NO to oxygen of 6:1, and a residence time of reactants of 15 seconds, the reaction produces methyl nitrite. The nitric acid content of the product was determined to be 7 ppm after condensation and gas-liquid separation, and the selectivity of methyl nitrite was 99.3%.
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