Method for wet oxidation separation of glass fiber and epoxy resin in WPCB non-metallic powder

A technology of glass fiber and non-metal powder, which is applied in the field of wet oxidation separation of glass fiber and epoxy resin in WPCB non-metal powder, which can solve the problems of polluting the environment, destroying the structure of crosslinking agent, and difficult to handle non-metal powder, and achieves The reaction is easy to operate, realizes resource utilization, and is suitable for batch processing

Pending Publication Date: 2019-04-19
SHANGHAI SECOND POLYTECHNIC UNIVERSITY +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The invention uses a high-temperature and high-pressure reactor, cooperates with the use of expansion agents and oxidants, destroys the crosslinking agent structure of glass fiber-reinforced epoxy resin composite materials, efficiently separates glass fibers and epoxy resin and recycles resources, and solves the problem of WPCB non-metallic powder It is difficult to deal with and pollute the environment, and at the same time realize its deep resource reuse value

Method used

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  • Method for wet oxidation separation of glass fiber and epoxy resin in WPCB non-metallic powder
  • Method for wet oxidation separation of glass fiber and epoxy resin in WPCB non-metallic powder
  • Method for wet oxidation separation of glass fiber and epoxy resin in WPCB non-metallic powder

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Effect test

Embodiment 1

[0022] Sieve WPCB non-metallic powder to obtain WPCB non-metallic particles with a particle size between 1 and 4mm, soak in 10% dilute nitric acid solution in a water bath at 70°C for 6 hours, then filter, and vacuum-dry the filter residue in an oven at 105°C 4h. Weigh the mass after drying as m 1 (2g) non-metallic powder, 48g acetic acid (expanding agent), 19.2g ZnCl 2 (Oxidant) mixed, placed in a 100ml hydrothermal kettle lining, put into an oven for reaction, the oven temperature was set at 190°C, and the reaction time was 20h. After the reaction is finished, the product is successively filtered with ethyl acetate and water to obtain the gray-brown non-metallic powder residue mass m 2 (1.2474g); The filtrate is extracted by ethyl acetate, and the extract is concentrated under reduced pressure by a rotary evaporator to obtain a brown epoxy resin solid mass m 3 (0.5526g), the epoxy resin that reclaims obtains is through Fourier transform infrared analyzer (potassium bromid...

Embodiment 2

[0034] Sieve WPCB non-metallic powder to obtain WPCB non-metallic particles with a particle size between 1 and 4mm, soak in 10% dilute nitric acid solution in a water bath at 70°C for 6 hours, then filter, and vacuum-dry the filter residue in an oven at 105°C 4h. Weigh the mass after drying as m 1 (2g) of non-metallic powder, 48g ethanol (swelling agent) and 19.2g ZnCl 2 (Oxidant) mixed, placed in a 100ml hydrothermal kettle lining, put into an oven for reaction, the oven temperature was set at 190°C, and the reaction time was 20h. After the reaction is finished, the product is successively filtered with ethyl acetate and water to obtain the gray-brown non-metallic powder residue mass m 2 (1.2730g); The filtrate is extracted by dichloromethane, and the extract is concentrated under reduced pressure by a rotary evaporator to obtain a brown epoxy resin solid mass m 3 (0.5270g), the epoxy resin that reclaims obtains is through Fourier transform infrared analyzer (potassium bro...

Embodiment 3

[0038] Sieve WPCB non-metallic powder to obtain WPCB non-metallic particles with a particle size between 1 and 4mm, soak in 10% dilute nitric acid solution in a water bath at 70°C for 6 hours, then filter, and vacuum-dry the filter residue in an oven at 105°C 4h. Weigh the mass after drying as m 1 (2g) of non-metallic powder, 40g acetic acid (expanding agent) and 8g CuCl 2 (Oxidant) mixed, placed in a 100ml hydrothermal kettle lining, put into an oven for reaction, the oven temperature is set at 220°C, and the reaction time is 20h. After the reaction is finished, the product is successively filtered with ethyl acetate and water to obtain the gray-brown non-metallic powder residue mass m 2 (1.3262g); The filtrate is extracted by ethyl acetate, and the extract is concentrated under reduced pressure by a rotary evaporator to obtain a brown epoxy resin solid mass m 3 (0.4378g), the epoxy resin that reclaims obtains is through Fourier transform infrared analyzer (potassium bromi...

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Abstract

Belonging to the technical field of resource recycling of electronic waste, the invention in particular relates to a method for wet oxidation separation of glass fiber and epoxy resin in WPCB non-metallic powder. The method includes: soaking non-metallic powder obtained by subjecting WPCB to mechanical crushing and sorting and metal recovery with a dilute nitric acid solution fully, conducting filtering and drying, then performing mixing with an expansion agent and an inorganic oxidant and carrying out wet high-temperature oxidation reaction, and subjecting the obtained product to follow-up treatment, thus obtaining high purity glass fiber and epoxy resin solid respectively. The molecular structure and characteristic functional group of the recovered epoxy resin do not change. The separated glass fiber (containing a small amount of organic ingredients) is employed to modify plastic, and the modified composite plastic shows performance superior to the original plastic, thus realizing the resource recycling value of WPCB non-metallic powder. The method mainly covers the chemical degradation separation method of WPCB non-metallic materials, the experimental scheme is environmentally friendly, and the separation effect is good.

Description

technical field [0001] The invention relates to the technical field of recycling and utilization of electronic waste resources, in particular to a method for wet oxidation separation of glass fiber and epoxy resin in WPCB non-metallic powder. Background technique [0002] Circuit boards (PCBs) are key components of electrical and electronic equipment. With the acceleration of technological innovation and the intensification of market competition, the update rate of electronic and electrical equipment is accelerated, and the life of electronic products is shortened, so the output of waste printed circuit boards WPCB has increased significantly. The data shows that the annual production of WPCB in the world is about 2.70 million tons, and the annual production of WPCB in mainland China alone has risen sharply at a rate of 14.4%. WPCB is mainly composed of metal and non-metal materials such as copper and tin. Among them, non-metallic materials account for 70% to 80% of its to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J11/26C08J11/24C08J11/16C08L23/06C08L67/02C08L23/12C08K9/06C08K7/14C08L63/00
CPCC08J11/16C08J11/24C08J11/26C08J2363/00C08K7/14C08K9/06C08L2207/062C08L23/06C08L67/02C08L23/12Y02W30/62
Inventor 苑文仪杨雨涵李英顺沈燕军王晓岩郑炯莉王临才王景伟张承龙白建峰
Owner SHANGHAI SECOND POLYTECHNIC UNIVERSITY
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