Cleaning production method of 2-(Ethoxyethoxy) ethyl acrylate (EOEOEA) or phenoxyethyl acrylate (PHEA)

Abstract

The invention belongs to the field of photocuring materials and relates to a cleaning production method of 2-(Ethoxyethoxy) ethyl acrylate (EOEOEA) or phenoxyethyl acrylate (PHEA). The method comprises the following steps: (1) carrying out esterification, backflow and dehydration on diethylene Glycol monoethylether or ethylene glycol phenyl ether, acrylic acid, a catalyst, a solvent, a polymerization inhibitor and an antioxidant; (2) adding caustic soda flakes and little water for neutralization; (3) adding a polymagnesium silicate adsorbent for adsorbing and neutralizing the generated salt; (4) reducing pressure for dehydration and removing the solvent; (5) carrying out filter pressing so as to filter polymagnesium silicate and the salt adsorbed by polymagnesium silicate; (6) adding alkaline Ca-based bentonite and calcium oxide for decoloration, micro water removal and trace acid removal; (7) carrying out filter pressing; and (8) detecting product indexes. The cleaning production method disclosed by the invention has high yield and social and environmental benefits, thus thoroughly solving the organic waste water pollution problem during the production process of EOEOEA or PHEA.

Description

technical field [0001] The invention belongs to the field of light-curing materials and relates to a clean production method of ethoxyethoxyethyl acrylate or ethoxyphenyl acrylate. Background technique [0002] With the rapid development of science and technology and the strict restrictions on solvents in environmental protection regulations, more and more people pay attention to photocurable polymer materials. Light-curing materials have excellent properties such as fast curing, low energy consumption, less pollution, and high efficiency, so they are widely used in coatings, printing, and electronics industries, and have developed rapidly in recent years. Ethoxy ethoxy ethyl acrylate (EOEOEA) and ethoxy phenyl acrylate (PHEA) are a new class of photocurable materials——monofunctional photocurable monomers with low viscosity, low irritation, and curable High speed, strong dilution, high transparency and other excellent properties, widely used in photo-curable inks, coatings,...

AI Technical Summary

Problems solved by technology

[0004] ①Most of the catalysts used are sulfuric acid, p-toluenesulfonic acid, methanesulfonic acid and other catalysts, which are usually removed by neutralization, water washing, and layering methods, which will produce a large amount of industrial organic wastewater and pollute the water environment;

[0005] ② During the reaction process, the excess (8%-15%) acrylic acid is completely washed away by water, and is usually removed by neutralization, water washing, and layering methods, which will produce a large amount of industrial organic wastewater with high COD, which is difficult to treat and has high treatment costs. The problem makes the product more expensive to manufacture;

[0006] ③While neutralizing and washing with water, some acrylate products will be taken away, which will reduce the yield and increase the cost

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