Method for preparing anisaldehyde
An anisaldehyde and ozonation technology, applied in the direction of ozonolysis preparation, organic chemistry, etc., to achieve the effects of facilitating industrial production, solving equipment corrosion, and long half-life
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Embodiment 1
[0026] (1) Mix anethole, acetone and water with a mass ratio of 20:20:1 to obtain reaction raw materials; 3 h -1 The flow rate of every kilogram of reaction raw materials is fed into ozone and oxygen mixed gas to carry out ozonation reaction; after the ozonation reaction is completed, continue to pass oxygen gas for 15 minutes to drive out excess ozone to obtain an ozonated reaction liquid; in the ozone and oxygen mixed gas, ozone The mass percentage content is 5%;
[0027] The height-to-diameter ratio of the bubbling reaction tower (made of glass) is 10:1, and a condensation jacket is added outside the bubbling reaction tower, and the condensation area is 0.32m 2 For each kilogram of reaction raw material, a gas distributor is installed at the bottom of the bubbling reaction tower, the aperture of the gas distributor is 50 μm, and the bubbling area of the gas distributor is 0.008m 2 For every kilogram of reaction raw material, a low-temperature reflux condensing device is...
Embodiment 2
[0030] (1) Mix anethole, acetone and water with a mass ratio of 20:88:12 to obtain the reaction materials; 3 h -1 The flow rate of every kilogram of reaction raw materials is fed into ozone and oxygen mixed gas, and the ozonation reaction is carried out for 1.0h; After the ozonation reaction is completed, continue to pass oxygen for 15min to drive out excess ozone to obtain an ozonated reaction liquid; the ozone and oxygen mixed gas The mass percent composition of ozone in the medium is 5%;
[0031] The height-to-diameter ratio of the bubbling reaction tower is 20:1, and a condensation jacket is added outside the bubbling reaction tower, and the condensation area is 0.50m 2 / kg reaction raw materials, the bottom of the bubbling reaction tower is equipped with a gas distributor, the aperture of the gas distributor is 5μm, and the bubbling area of the gas distributor is 0.01m 2 / kg of reaction raw materials, the top of the bubbling reaction tower is equipped with a low-tempe...
Embodiment 3
[0034] (1) Mix anethole, methyl ethyl ketone and water with a mass ratio of 20:51:9 to obtain the reaction raw materials; add the reaction raw materials into the bubbling reaction tower, control the reaction temperature at 25°C, and use 0.24m 3 h -1 The flow rate of every kilogram of reaction raw materials is passed into ozone and oxygen mixed gas, and carries out ozonation reaction 1.2h; After ozonation reaction finishes, continue to pass oxygen 25min to drive out excess ozone, obtain ozonated reaction liquid; Described ozone and oxygen mixed gas The mass percent composition of ozone in the medium is 2%;
[0035] The height-to-diameter ratio of the bubbling reaction tower is 20:1, and a condensation jacket is added outside the bubbling reaction tower, and the condensation area is 0.50m 2 / kg reaction raw materials, the bottom of the bubbling reaction tower is equipped with a gas distributor, the aperture of the gas distributor is 5μm, and the bubbling area of the gas distr...
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