Synthesis method of hydroxyethyl acrylate

Abstract

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.

Description

technical field [0001] The invention relates to the technical field of organic chemical industry, in particular to a method for synthesizing hydroxyethyl acrylate. Background technique [0002] 2-Hydroxyethyl acrylate is an organic compound with the molecular formula C5H8O3, a colorless liquid. Soluble in general organic solvents, miscible with water. Copolymers can be used as fiber treatment agents, thermosetting coatings, adhesives with high bond strength, rubbers with both heat resistance and oil resistance (such as acrylic copolymer rubber), paper processing agents, lubricant additives, and acrylamide. The copolymer can be used as a thickener, the copolymer with vinyl ether can be used as a substitute for floor wax, and the copolymer with divinylbenzene can be used as an ion exchange resin. [0003] In the process of traditionally synthesizing hydroxyethyl acrylate, with the growth of time, the polymer increases, and the amount of chloroethanol added needs to be reason...

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Problems solved by technology

[0005] Aiming at the deficiencies in the prior art, the present invention provides a kind of synthetic method of hydroxyethyl acrylate, which solves the problem that in the process of one-step synthesis of hydroxyethyl acrylate, as time increases, the number of polymers increases, and the problem of chlorohydrin needs to be reasonably controlled. The amount of addition, once the chlorohydrin is less, it is easy to make the reaction solution viscous; in addition, the temperature has a greater impact on the reaction

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