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Green recycling method for non-metallic materials in circuit board waste

A non-metallic material, circuit board technology, applied in recycling technology, plastic recycling, chemical instruments and methods, etc., can solve the problems of complex circuit board components, reduce environmental protection value, consume large acids, etc., achieve easy distillation recovery, improve Recycling efficiency, reducing the effect of waste acid generation

Inactive Publication Date: 2021-08-13
JINGGANGSHAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the components of waste circuit boards after metal recycling are relatively complex, containing a certain amount of glass fiber and flame retardants, and a certain amount of residual metal. Therefore, using this method requires a large amount of acid consumption, and the waste acid produced will also produce secondary pollution, which reduces its environmental protection value to a certain extent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Under the condition of stirring at 50°C, add 10 g of waste (non-metallic waste of circuit board) after recycling metal from the circuit board (the mass fraction of the resin is 50%) to 20 g of dichloroethane solution, stir rapidly for 0.5 h, and carry out uniform Disperse to obtain 30g of dispersion A; slowly add 2g of chloromethyl methyl ether into dispersion A, continue stirring at 10°C for 3h to obtain dispersion B; dropwise add 20mL of acetone to form dispersion C, perform centrifugation, dry, and collect . The quaternization treatment was carried out with 30% trimethylamine solution to obtain a porous ion exchange resin with an ion exchange capacity of 1.2 mmol / g. If the chloromethylation modification time is adjusted to 2 h, a porous ion exchange resin with an ion exchange capacity of 1.2 mmol / g is obtained.

Embodiment 2

[0027] Under the condition of stirring at 30°C, add 10g of waste materials (the mass fraction of which is 50% of the resin) from circuit board recycling to 20g of dichloroethane solution, stir rapidly for 0.5h, and uniformly disperse to obtain 30g of dispersion A ; Add 3 g of chloromethyl methyl ether slowly to dispersion A, and continue stirring at 10°C for 0.5 h to obtain dispersion B; add 20 mL of acetone dropwise to form dispersion C, which is centrifuged, dried, and collected. The quaternization treatment was carried out with 30% trimethylamine solution to obtain a porous ion exchange resin with an ion exchange capacity of 1.4 mmol / g.

Embodiment 3

[0029] Under the condition of stirring at 50°C, add 10 g of scrap metal recovered from circuit boards (the mass fraction of resin is 50%) to 20 g of methylene chloride solution, stir rapidly for 0.5 h, and uniformly disperse to obtain 30 g of dispersion A; Slowly add 3 g of chloromethyl ethyl ether to dispersion A, and continue stirring at 10°C for 2 h to obtain dispersion B; add 20 mL of acetone dropwise to form dispersion C, which is centrifuged, dried, and collected. The quaternization treatment was carried out with 30% trimethylamine solution to obtain a porous ion exchange resin with an ion exchange capacity of 1.4 mmol / g.

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PUM

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Abstract

The invention provides a green recycling method of non-metallic materials in circuit board waste, which comprises the following steps: treating the circuit board waste by using a swelling agent, then adding a chloromethylation reagent for modification, then solidifying and separating out by using acetone, drying, and then soaking by using a trimethylamine solution to obtain cation exchange resin. According to the method, the recycling efficiency of non-metallic materials of the circuit board is greatly improved, a sulfonating reagent is not used, the use amount of acid and generation of waste acid are reduced, the swelling agent is easy to recycle, and the anion exchange resin with high performance is obtained under the mild condition. Therefore, environmental pollution caused by circuit board waste recovery and treatment is remarkably reduced, and waste is turned into wealth.

Description

technical field [0001] The invention belongs to the technical field of comprehensive utilization of solid waste, and relates to a method for green recycling of non-metallic materials in circuit board waste, in particular to a method for preparing anion exchange resin from circuit board waste, especially suitable for epoxy resin and Green recycling of phenolic resin type circuit boards. Background technique [0002] With the development of society, the progress of science and technology, and the upgrading of electronic products, the output of circuit board waste is huge. At the same time, a large amount of leftovers will be generated during the processing of circuit board products, which has become an important environmental problem in China and the world. At present, there are many studies on the recycling of metal components in circuit boards, and the technology is relatively mature, while there are relatively few studies on the recycling and safe disposal of non-metallic m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J11/04C08G59/14C08G8/28C08L63/00C08L61/14C08K7/14B01J41/13
CPCC08J11/04C08G8/28C08G59/1494C08G59/1477C08G59/1438B01J41/13C08J2363/00C08J2361/14C08K7/14Y02W30/62Y02P20/143
Inventor 韩润林
Owner JINGGANGSHAN UNIVERSITY
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