Continuous production device for hydroxyethyl (methyl)acrylate

Abstract

The invention discloses a continuous production device for hydroxyethyl (methyl)acrylate. The continuous production device comprises a batching tank, a metering tank, a tubular reactor, a condenser, an intermediate finished product tank, a vacuum spray absorption tower, a short-path distillation kettle, a finished product tank and a distillation kettle, wherein (methyl)acrylic acid, a catalyst anda polymerization inhibitor pass through the batching tank and enter the tubular reactor; ethylene oxide passes through the metering tank and enters the tubular reactor; a reaction mixed solution enters the condenser for condensation and separation, wherein excess ethylene oxide returns to the metering tank from the condenser, and a semi-finished product enters the intermediate finished product tank and the vacuum spray absorption tower from the condenser, returns to the batching tank from the top of the vacuum spray absorption tower, and is delivered to the short-path distillation kettle fromthe bottom of the vacuum spray absorption tower; the discharge outlet of the short-path distillation kettle is divided into three ways, wherein a first way is to the finished product tank, and a second way is to return to the short-path distillation kettle; and a residual solution from the short-path distillation kettle enters the distillation kettle through a third way. The continuous productiondevice provided by the invention has the following advantages: a reaction temperature is low; side reactions are reduced; the loss of raw materials is reduced; the conversion rate of the raw materials is improved; and continuous production is realized.

Description

technical field [0001] The invention relates to the technical field of organic compound production equipment, in particular to a continuous production equipment of hydroxyethyl (meth)acrylate. Background technique [0002] (Meth) hydroxyethyl acrylate is an important class of chemical raw materials. Due to the unique structure of different carbon chain double bonds, hydroxyl groups and ester groups, it can be used as a polymerizable monomer to form a variety of polymers through homopolymerization and copolymerization. Polymers are firmly bonded, not easy to peel off, flexible and elastic at room temperature, and have good water resistance, so they are widely used in the synthesis of (meth)acrylic resins, photocurable resins, optical resins, coatings, etc. [0003] At present, the industrial production of hydroxyethyl (meth)acrylate is mainly to add ferric thiocyanate, tetramethylammonium chloride, etc. and a little hydroquinone to (meth)acrylic acid, stir and heat to 90°C, ...

AI Technical Summary

Problems solved by technology

[0003] At present, the industrial production of hydroxyethyl (meth)acrylate is mainly to add ferric thiocyanate, tetramethylammonium chloride, etc. and a little hydroquinone to (meth)acrylic acid, stir and heat to 90°C, , and react with ethylene oxide gas for about 2 hours, cool the reaction product to 60°C, add a small amount of hydroquinone and distill it under reduced pressure, collect 86-89°C (0.67kPa) fractions to obtain the finished product, with a yield of 80% Above, the disadvantage of this kind of equipment is that ethylene oxide is flammable and explosive, and has strict requirements on production equipment

At present, for the industrial production of hydroxyethyl (meth)acrylate, the existing equipment has problems such as serious pollution and inability to realize continuous production.

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