Electrically-driven ionic membrane device and butyl acrylate wastewater treatment process

Abstract

The invention discloses an electrically-driven ionic membrane device and a butyl acrylate wastewater treatment process. A cation exchange membrane which an ion selective permeation function, only sodium ions in sodium acrylate are allowed to enter a cathode region from an anode region, and OH <-> and acrylate ions in water are not allowed to pass through. According to the electrically-driven ionic membrane device, under the action of an external direct-current electric field, on the basis of the selective permeability of the electrically-driven ionic membrane, fresh water generated in the physical and chemical process that sodium acrylate and sodium methanesulfonate in butyl acrylate wastewater are migrated to a concentrated water chamber in the device from a fresh water chamber in the device does not need to be adjusted, and can directly enter a biological treatment system so as to be treated and is discharged after reaching the standard after being treated; the generated sodium acrylate strong brine is treated by the electrically-driven homogeneous cation membrane device, acrylic acid and sulfonic acid are generated in an anode chamber and are exchanged by strongly acidic cation exchange resin, and then trace sodium ions in the acid are removed, and the acrylic acid and sulfonic acid are completely recovered.

Description

technical field [0001] The invention relates to an ionic membrane device and a treatment process for butyl acrylate wastewater, in particular to an electrically driven ionic membrane device, an electrically driven cationic membrane device and a treatment process for butyl acrylate wastewater. Background technique [0002] The process for producing butyl acrylate by homogeneous catalysis with p-toluenesulfonic acid or methanesulfonic acid is simple, and is one of the mainstream processes for producing butyl acrylate at present. The process uses acrylic acid and n-butyl ester to react continuously under the catalysis of an organic acid catalyst. During the process, the generated water is continuously separated from the system by azeotropic, thereby producing butyl acrylate. Since the esterification reaction is a reversible reaction, the acrylic acid cannot be completely converted in this reaction. The incompletely reacted acrylic acid is subsequently neutralized and removed b...

AI Technical Summary

Problems solved by technology

In this way, useful resources such as acrylic acid and sodium hydroxide in butyl acrylate wastewater are completely lost, and the biological treatment process is also very unstable, which seriously affects the normal operation of the device.

The incineration method to treat butyl acrylate wastewater is also a relatively common treatment method at present, and the treatment process is simple and effective; however, the shortcomings of this method are also very obvious:

[0005] (1) Incineration needs to consume a large amount of fuel, and the cost is high;

[0006] (2) The sodium salt in the wastewater will affect the incineration efficiency, and the inorganic sodium salt produced will hang on the furnace wall and the flue gas channel, causing the incinerator to malfunction; this method has high treatment cost and low treatment efficiency

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