Method for synthesizing acrylic alkoxy ethyl ester or methacrylate alkoxy ethyl ester
A technology of alkoxyethyl methacrylate and alkoxyethyl acrylate, which is applied in the field of synthesis of alkoxyethyl acrylate and alkoxyethyl methacrylate, can solve the problem of poor polymerization inhibition effect and product color Deep, large dosage and other problems, to achieve the effect of stable properties, low corrosion, and economical reaction
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example 1
[0029] Add ethylene glycol monomethyl ether (EM) 192g, acrylic acid (AA) 130.5g, newly prepared solid superacid SO 4 2- / TiO 2 25.7g, toluene 104g, phenothiazine-hydroquinone-copper powder composite polymerization inhibitor (mass ratio 1:1:1) 1g, control reaction temperature 120~~136 ℃, keep reactant in boiling state all the time, reflux After 7 hours of reaction, 328.6 g of crude product was obtained. The product is analyzed by gas chromatography, and the composition content is shown in the following table:
[0030] composition
[0031] The one-way esterification rate of acrylic acid is 97.4%.
example 2
[0033] Add ethylene glycol monomethyl ether (EM) 192g, acrylic acid (AA) 130g, newly prepared solid super acid SO 4 2- / TiO 2 32.2g, toluene 110g, phenothiazine-hydroquinone-copper powder composite inhibitor (mass ratio 1:1:1) 1g, control reaction temperature 120~134 ℃, keep reactant in boiling state all the time, reflux reaction 7h, 339.5g of crude product was obtained, and the product was analyzed by gas chromatography, and the composition and content were shown in the following table:
[0034] composition
[0035] The one-way esterification rate of acrylic acid is 99.2%.
example 3
[0037] Add 191.5 g of ethylene glycol monomethyl ether (EM) and 154.8 g of methacrylic acid (MAA) into a 1000 ml three-neck flask with a water separator, reflux condenser, and Φ20×130 packed tower, and newly prepared solid superacid SO 4 2- / TiO 2 20.8g, toluene 103.9g, phenothiazine 0.5g, control the reaction temperature at 120-138°C, keep the reactant in a boiling state, reflux for 7h, and get 311.2g of crude product, the product is analyzed by gas chromatography, the composition and content are shown in the table below :
[0038] composition
[0039] The one-way esterification rate of methacrylic acid was 89.0%.
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