Treatment method of butanone residues containing acrylic acid adhesives

Abstract

The invention discloses a treatment method of butanone residues containing acrylic acid adhesives, and belongs to the field of industrial waste resource utilization. The method comprises the specifictreatment steps: 1) adding alkali liquor into butanone distillation residues, heating to obtain a solid and a liquid, and filtering to separate the solid from the liquid to obtain a filter residue andfiltrate; 2) adding the obtained filter residue into an acid / alcohol mixture, treating to obtain a solid-liquid mixture, and carrying out solid-liquid separation to obtain a solid and filtrate; 3) flushing the obtained solid with water to obtain a thermoplastic plastic product and flushing water; 4) neutralizing the filtrate obtained in the step 2) and the flushing water obtained in the step 3) by using sodium hydroxide, distilling to obtain an organic phase and a salt solution, adding the organic phase into the same acid solution as the acid solution in the step 2), reusing the mixed solution as an acid / alcohol mixture into the step (2), and distilling and recycling the salt solution; and 5) extracting and separating the filtrate in the step 1) to obtain an organic phase and a water phase, and rectifying and separating the organic phase to obtain butanone. The method has a simple process and conforms to the green industrial standard.

Description

technical field [0001] The invention belongs to the field of resource utilization of industrial waste, and in particular relates to a method for treating methyl ethyl ketone residue containing acrylic adhesive. Background technique [0002] my country's printed circuit board industry is developing rapidly, and the printed circuit board process is complicated. During the printed circuit board process, butanone is used as a resin cleaning agent to clean the circuit board, resulting in a large amount of butanone waste liquid containing resin. The distillation of the waste liquid can recover butanone for recycling, and the tailings of the distillation also contain a large amount of acrylic resin in addition to the butanone residue. This type of resin is the main component of glue / adhesive, with high viscosity and difficult transfer and handling. The butanone content in the distillation residue of butanone is 30%-60%, and the content of acrylic resin is 40%-70%. for organic matt...

AI Technical Summary

Problems solved by technology

[0003] In the incineration process, due to the presence of a large amount of methyl ethyl ketone in the tailings, it is easy to cause the furnace to deflagrate, resulting in a greater safety risk. Unrecyclable methyl ethyl ketone is a great waste of resources while polluting the environment.

[0004] CN 104031943 A relates to a diketene rectification residue treatment process and relates to the field of chemical industry. It is a diketene distillation residue treatment process, which solves the problem of low extraction rate of acetone in the diketene distillation residue waste liquid in the prior art, low purity, and overall process time. Long, low efficiency, incomplete treatment of liquid residue discharged after treatment, etc., the present invention adopts fermentation treatment after vacuum distillation, and uses biological bacteria to decompose harmful substances. The process is simple, the production efficiency is high, and the wastewater treatment Waste thoroughly

However, this treatment method mainly uses organisms to decompose the pollutants, and there are problems such as the waste residue cannot be utilized as a resource, and the treatment time is long.

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