Isopropenyl acetate synthesis
- Product Name:Isopropenyl acetate
- CAS Number:108-22-5
- Molecular formula:C5H8O2
- Molecular Weight:100.12
64-19-7
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108-22-5
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Yield:108-22-5 99.5%
Reaction Conditions:
Stage #1:acetic acid in water at 800;
Stage #2:acetone in water for 1 h;Temperature;
Steps:
4
Acetic acid into the stainless steel tube, and then heating the heating of acetic acid,The temperature was raised to 800 ° C, so that acetic acid in the stainless steel tube catalytic cracking to generate vinyl ketone gas,The resulting ketene gas is introduced into the cooler,And then to the cooler by adding 30 of water on the ketone gas for the initial cooling treatment,The molar ratio of ketene to water was 3.3: 1, and the dropping speed of water was 40 ml / min.The acetone solution was put into a mixed dish, the molar ratio of acetone solution to ketene was 2: 1.5,While the catalyst was fed into the mixing pan, the molar ratio of catalyst to acetone solution was 1.5: 1,After mixing for 60 min, the mixture was driven into the cooler with a metering pump,So that the mixed solution is subjected to further cooling treatment of the ketene gas obtained by the lysis reaction,While the mixture is evaporated to a gas.The thermostat is subjected to tempering treatment,So that the temperature of the mixed gas in the cooler was maintained at 80 ° C,And then transported to the synthesis reaction tower,The synthesis reactor is filled with a filler,The mixed gas is contacted and mixed with the filler surface in the synthesis reaction column,At the same time, the temperature in the synthesis reactor was raised to 28 ° C,So that the mixed gas in the filler surface reaction reaction gas, reaction 1.5h.The resulting reaction gas is fed to a circulating water condenser,The reaction gas was obtained after 2 hours of condensationThe crude product was purified to give isopropenyl acetate,And then the isopropenyl acetate cooling crystallization,Finally drying the product, the non-condensing reaction gas is sprayed with acetone solution,Acetone solution spray rate of 55ml / min, and then concentrated recovery of acetone absorption solution,And recycling.After the operation of this example, the purity of the isopropenyl acetate product was 99.5%.
References:
Quzhou Xinbu Chemical Technology Co Ltd;Yan, zhaochun CN105777540, 2016, A Location in patent:Paragraph 0050-0055
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108-22-5
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108-22-5
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