Treatment method of butanone residues containing acrylic acid adhesives

A treatment method and adhesive technology, applied in the direction of reagents, plastic recycling, educts, etc., can solve the problems of furnace deflagration, low efficiency, waste, etc.

Active Publication Date: 2020-02-18
WUXI ZHONGTIAN SOLID WASTE DISPOSAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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  • Treatment method of butanone residues containing acrylic acid adhesives
  • Treatment method of butanone residues containing acrylic acid adhesives
  • Treatment method of butanone residues containing acrylic acid adhesives

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Add 500g of alkali solution with a mass fraction of 20% to 100g of butanone distillation residue and heat it at 90°C. After keeping for 6h, the residue solidifies into a whole piece floating on the surface of the solution, and is filtered to separate the solid and liquid to obtain 125g of yellow solid in the upper layer and butanone / water mixed solution 475g, the mixed solution is extracted by glycerin to obtain butanone and alkali solution, the organic phase is recovered by rectification butanone, glycerin is reused as extractant, and the alkali solution after extraction is dissolved by adding 100g of sodium hydroxide solid Reuse. Add 120g of hydrochloric acid / ethylene glycol mixed solution to 125g of yellow solid, hydrochloric acid: ethylene glycol = 1:5, wash away the small molecules, and acidify the existing polymer molecules at the same time, and add 150g of water to wash to obtain 130g of Yellow solid, thermoplastic solid. After the washing water is distilled un...

Embodiment 2

[0035] Add 400g of 40% lye to 200g of methyl ethyl ketone distillation residue and heat it at 70°C. After keeping for 3 hours, the residue solidifies into a whole piece floating on the surface of the solution, filters to separate the solid and liquid, and mixes 250g of the upper yellow solid with methyl ethyl ketone / water Solution 350g, the mixed solution is extracted by dichloromethane to separate butanone and alkali solution, the organic phase is recovered by rectification butanone, dichloromethane is reused as the extraction agent, and the extracted alkali solution is dissolved by adding 160g of sodium hydroxide solid for reuse. Add 500g of sulfuric acid / methanol mixed solution to 250g of yellow solid, sulfuric acid:methanol=1:10, wash away the small molecules, and acidify the existing polymer molecules, and add 300g of clear water to wash to obtain 260g of light yellow solid, namely Thermoplastic solid. After the washing water is distilled at 60°C, 50 g of sulfuric acid i...

Embodiment 3

[0037] Add 330g of 50% lye to 120g of butanone distillation residue and heat it at 90°C for 1 hour, the residue solidifies into a whole piece floating on the surface of the solution, filters to separate the solid and liquid, and mixes 150g of the upper yellow solid with butanone / water Solution 300g, the mixed solution is extracted by dimethylacetamide, butanone and alkali solution are separated, the organic phase is recovered by rectification butanone, dimethylacetamide is reused as the extraction agent, and the extracted alkali solution is 165g sodium hydroxide for reuse. Add 200 g of hydrochloric acid / ethanol mixed solution to 150 g of yellow solid, hydrochloric acid: ethanol = 1:8, wash away the small molecules, and acidify the existing polymer molecules, and add 180 g of clear water to wash to obtain 160 g of light yellow solid, namely Thermoplastic solid. After the washing water is distilled at 60°C, ethanol is separated, and 25g of hydrochloric acid is added for reuse a...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J11/02C08J11/04C08F120/06C08L33/04C08L33/02
CPCC08J11/02C08J11/04C08F120/06C08J2333/04C08J2333/02Y02P20/143Y02W30/62
Inventor 王婧婷马斌斌
Owner WUXI ZHONGTIAN SOLID WASTE DISPOSAL CO LTD
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