反应详情

温度

75 °C

400 g of methyl methacrylate (4 mole), 152 g of ethylene glycol monomethyl ether (2 mole), 2.75 g of KCN (0.5%) and 0.14 g of hydroquinone monomethyl ether (250 ppm) are added to a 1 liter round-bottomed flask. The batch is heated to about 75° C. and the methyl methacrylate/methanol-azeotrope is distilled-off by way of a 1 m vigreux column at 65° C. temperature at the head of the column. After 4 hours, the trans-esterification is completed. After cooling of the flask, the sump is filtered to remove the potassium cyanide, and the filter residue is washed with a little methyl methacrylate. The filtrate is concentrated at 40° C. under a water jet vacuum. A residue of ethylene glycol monomethylether methacrylate of 260 g = 90% results.

1. customis distilled-off by way of a 1 m vigreux column at 65° C.
2. temperatureAfter cooling of the flask
3. filtrationthe sump is filtered
4. customto remove the potassium cyanide
5. washthe filter residue is washed with a little methyl methacrylate
6. concentrationThe filtrate is concentrated at 40° C. under a water jet vacuum