Method for pyrolysis oil debromination and lightening of waste circuit board

A waste circuit board and pyrolysis oil technology, which is applied to chemical instruments and methods, solid waste removal, and hydrocarbon oil treatment, can solve environmental secondary pollution, a large amount of waste gas, waste liquid and waste residue, and are not fully utilized. problem, to achieve the effect of high porosity, large specific surface area and good catalytic effect

Active Publication Date: 2017-12-15
GUANGDONG POLYTECHNIC OF ENVIRONMENTAL PROTECTION ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional treatment methods of WPCBs mainly include mechanical physical method, chemical method and pyrometallurgy, etc. The purpose is to recover the valuable metals in them. The remaining non-metallic parts are not fully utilized, and it is easy to produce a large amount of waste gas, waste liquid and waste residue, which is harmful to the environment. cause secondary pollution
The pyrolysis technology can effectively separate metals, organic matter and glass fibers, and has attracted much attention and research in recent years, especially the vacuum pyrolysis treatment technology. However, WPCBs contain halogen-containing flame retardants, resulting in thermal Pyrolysis oil contains a large amount of bromine-containing substances, which seriously hinders the further utilization of pyrolysis oil

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A kind of composite additive, by the CaCO of the molecular sieve 5A of 30 parts by weight and 70 parts by weight 3 composition.

[0022] A method for debromination and lightening of waste circuit board pyrolysis oil, comprising the following steps:

[0023] S1. The circuit board of the electronic components is removed and broken, the non-metal powder is extracted and put into the pyrolysis furnace, and the composite additive is added, wherein the composite additive is mixed evenly and then the non-metal powder is added to fully mix;

[0024] S2. After the feeding is completed, heat the pyrolysis furnace to 400°C and keep it for 2 hours until it is completely pyrolyzed, and the pyrolysis oil produced after pyrolysis is collected;

[0025] The weight ratio of non-metallic powder and composite additive is 1:1.

Embodiment 2

[0027] A kind of composite additive, by the molecular sieve 5A of 50 parts by weight and the CaCO of 50 parts by weight 3 composition.

[0028] A method for debromination and lightening of waste circuit board pyrolysis oil, comprising the following steps:

[0029] S1. Remove the electronic components and break the circuit board, extract the non-metallic powder and put it into the pyrolysis furnace, and add compound additives, among which molecular sieve 5A is first added and mixed with the non-metallic powder evenly before adding CaCO 3 , CaCO 3 Do not mix with non-metallic powders;

[0030] S2. After the feeding is completed, heat the pyrolysis furnace to 450°C and keep it for 1.5 hours until complete pyrolysis, and collect the pyrolysis oil produced after pyrolysis;

[0031] The weight ratio of non-metal powder and composite additive is 1:2.

Embodiment 3

[0033] A kind of composite additive, by the CaCO of the molecular sieve 5A of 80 parts by weight and 20 parts by weight 3 composition.

[0034] A method for debromination and lightening of waste circuit board pyrolysis oil, comprising the following steps:

[0035] S1. Remove the circuit board of the electronic components and break, extract the non-golden powder and put it into the pyrolysis furnace, and add compound additives, among which CaCO 3 First add and mix with non-golden powder evenly, then add molecular sieve 5A, molecular sieve 5A is not mixed with non-golden powder;

[0036]S2. After the feeding is completed, heat the pyrolysis furnace to 500°C and keep it for 1 hour until it is completely pyrolyzed, and the pyrolysis oil produced after pyrolysis is collected;

[0037] The weight ratio of non-metallic powder to composite additive is 2:1.

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Abstract

The invention discloses a method for pyrolysis oil debromination and lightening of a waste circuit board. The method comprises the following steps that S1, the waste circuit board is crushed, nonmetal powder is extracted and put into a pyrolysis furnace, and a composite additive is added; and S2, the material is heated to be 400-500 DEG C for 1-2 h till the material is completely pyrolyzed, and pyrolysis oil is collected, wherein the composite additive comprises following components of, by weight, 10-90 parts of molecular sieve 5A and 10-90 parts of CaCO3. Pyrolysis oil dehalogenation and lightening of the waste circuit board can be simultaneously realized, the method can be widely used for treating and disposing or recycling of the waste circuit board, and good application prospects are achieved.

Description

technical field [0001] The invention belongs to the technical field of recycling waste circuit boards, and in particular relates to a method for debromination and lightening of waste circuit board pyrolysis oil. Background technique [0002] Printed Circuit Boards (PCB for short) is a thermosetting composite material. As the core component of electronic products, it is widely used in many industrial fields such as electronic components and electric control. With the development of science and technology, the frequency of replacement and elimination of electronic products has accelerated, leading to an increase in the amount of PCB waste. According to the estimate of the United Nations University, in 2005, the e-waste in EU countries was as high as 9.1 million tons, and it was increasing at a rate of 2.5% to 2.7% every year. In 2008, China's output of printed circuit boards was as high as 26% of the world's total, occupying the first place in the world. At the same time, wa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00C10G1/00C08J11/16
CPCC10G1/00C08J11/16C10G2300/1003B09B3/40Y02W30/62Y02W30/82
Inventor 杨帆孙水裕叶子玮林伟雄陈楠纬李保庆任随周蔡焕然
Owner GUANGDONG POLYTECHNIC OF ENVIRONMENTAL PROTECTION ENG
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