Method for preparing glycol methyl ether acetate
A technology of ethylene glycol methyl ether and acetate, applied in the preparation of carboxylate, chemical instruments and methods, preparation of organic compounds, etc., can solve the problems of non-recyclable, high toxicity, expensive catalyst, etc., and achieve equipment corrosion The effect of small, small dosage, and cheap catalyst
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Embodiment 1
[0021] Step 1 Preparation of solid base catalyst
[0022] Preparation of alkaline earth metal oxides
[0023] Take CaO powder and roast it in a muffle furnace at 800°C for 5 hours to obtain it;
[0024] Step 2 transesterification reaction
[0025] Add 0.6mol ethyl acetate, 0.1mol ethylene glycol methyl ether, and 0.1g solid alkali catalyst into a 250mL three-necked flask equipped with electromagnetic stirring, a thermometer, a rectifying column, an adapter tube, and a recovery flask, and heat to reflux and stir to make The ethanol produced by the reaction is azeotropically distilled from the upper end of the distillation head, and the reaction stops until the temperature at the upper end of the distillation head is higher than the azeotropic temperature of ethyl acetate and ethanol (that is, no ethanol is distilled out);
[0026] Step 3 Catalyst separation and product purification
[0027] Filter the material obtained in the previous step, and the filtered catalyst is dried...
Embodiment 2
[0029] Except the following differences, all the other are the same as Example 1.
[0030] Preparation of Supported Solid Base Catalyst
[0031] Dissolve 4 grams of KF in 25 grams of water, add 10 grams of Al 2 o 3 , after stirring at 60°C for 1h, rotary steaming to dryness, drying the solid in an oven at 100°C for 12h, and calcining in a muffle furnace at 800°C for 5h; the yield is 95%.
Embodiment 3-8
[0033] Except for the following differences, the others are the same as in Example 2, with KF as the active component and different carriers shown in Table 1.
[0034] Table 1
[0035] Example
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