The present invention relates to the technical field of organic
chemical industry, and discloses a hydroxyethyl
acrylate synthesis method, which comprises: S1, adding
acrylic acid, chloroethanol and
sodium hydroxide into a reaction kettle, electrically stirring, uniformly mixing, heating, heating to 120 DEG C, maintaining the constant temperature, heating for 1.5 H, stopping the reaction, and cooling; s2, placing a Buchner funnel at a
discharge pipe of the reaction kettle, enabling a
solid-liquid mixture to pass through the Buchner funnel, enabling a
solid substance to fall above the Buchner funnel, and enabling liquid to flow out of the Buchner funnel to flow into a container below the Buchner funnel; s3, adding quantitative
diethylene glycol and a proper amount of
hydroquinone into the reaction
mother liquor in the container, and carrying out reduced pressure
distillation to separate out excessive chloroethanol; the condition of reduced pressure
distillation has great influence on the reaction yield, even if a
polymerization inhibitor is added, the yield is reduced due to increase of the concentration of chloroethanol in the later stage of
distillation, higher temperature, product
polymerization and the like, and
diethylene glycol with a higher
boiling point is added, so that the chloroethanol is diluted in a distillation kettle, the
viscosity is reduced, and the temperature is stable and easy to control.