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Method for preparing waste circuit board activated carbon by vapor process

A technology for waste circuit boards and board activated carbon, which is applied in chemical instruments and methods, carbon compounds, inorganic chemistry, etc., can solve the problems of residual chemicals, waste of resources, and complex components in carbon products, so as to alleviate the shortage of raw material resources and reduce waste and cost reduction

Inactive Publication Date: 2015-05-06
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Non-metallic materials contain a lot of epoxy resin and glass fiber, improper handling will also cause waste of resources
At present, there are mainly the following problems in the process of processing and utilization of non-metallic materials: large output, complex composition, low recycling value and secondary pollution, etc.
The disadvantage of this method is that it is highly corrosive to the equipment, and the carbon product contains residual chemicals and other shortcomings.

Method used

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  • Method for preparing waste circuit board activated carbon by vapor process
  • Method for preparing waste circuit board activated carbon by vapor process
  • Method for preparing waste circuit board activated carbon by vapor process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A method for producing activated carbon from waste circuit boards by water vapor method, the steps are as follows:

[0034] (1) After the waste circuit board is crushed, the metal and non-metal objects are separated by the specific gravity method, and the non-metal objects are crushed to a particle size of 0.2mm×0.2mm to obtain the non-metal powder of the waste circuit board;

[0035] (2) Place the non-metallic powder of waste circuit boards in a carbonization furnace, raise the temperature to 600°C at a rate of 8°C / min under anaerobic conditions, and treat at 600°C for 1.5 hours at a constant temperature to obtain carbonized waste circuit boards plate;

[0036] (3) Take the carbonized waste circuit board in step (2), and raise the temperature to 800°C at a rate of 4°C / min under the protection of water vapor, and the rate of water vapor is 0.6L / min. React at a constant temperature for 60 minutes, cool to room temperature and directly grind and sieve to obtain activated...

Embodiment 2

[0039] A method for producing activated carbon from waste circuit boards by water vapor method, the steps are as follows:

[0040] (1) After the waste circuit board is crushed, the metal and non-metal objects are separated by the specific gravity method, and the non-metal objects are crushed to a particle size of 0.2mm×0.2mm to obtain the non-metal powder of the waste circuit board;

[0041] (2) Place the non-metallic powder of waste circuit boards in a carbonization furnace, raise the temperature to 500°C at a rate of 10°C / min under anaerobic conditions, and carbonize at a constant temperature of 500°C for 2 hours

[0042](3) Take the carbonized waste circuit board in step (2), and raise the temperature to 750°C at a heating rate of 6°C / min under the protection of water vapor, and the rate of water vapor introduction is 0.8L / min. React at a constant temperature for 90 minutes, cool to room temperature and directly grind and sieve to obtain activated carbon from waste circuit ...

Embodiment 3

[0044] A kind of method for the waste and old circuit board activated carbon of water vapor legal system, as described in embodiment 1, difference is:

[0045] Step (2), put the non-metallic powder of the waste circuit board in a carbonization furnace, raise the temperature to 450°C at a heating rate of 6°C / min under anaerobic conditions, and carbonize at a constant temperature of 450°C for 3 hours

[0046] (3) Take the carbonized waste circuit board in step (2), and raise the temperature to 900°C at a rate of 8°C / min under the protection of water vapor, and the rate of water vapor is 1L / min. React at a constant temperature for 30 minutes, cool to room temperature, and directly grind and sieve to obtain activated carbon from waste circuit boards. The prepared activated carbon has a specific surface area of ​​up to 705m 2 / g. The methylene blue adsorption amount was 302 mg / g.

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Abstract

The invention relates to a method for preparing waste circuit board activated carbon by a vapor process, which comprises the following steps: by using non-metal materials in waste circuit boards as a raw material, carbonizing in an existing carbonization furnace for 1-3 hours, heating to 700-900 DEG C to activate for 30-120 minutes under the protection of vapor, and cooling to room temperature to directly obtain the product. The activated carbon is prepared from the non-metal materials in the waste circuit boards by the vapor process; and the method does not use any activator in the preparation process, thereby lowering the production cost of activated carbon and implementing reutilization of waste resources. The prepared activated carbon has favorable adsorbability, thereby providing a new way for recovery and comprehensive utilization of non-metal materials in waste circuit boards.

Description

technical field [0001] The invention relates to a method for preparing activated carbon by using waste circuit boards as raw materials through a steam method, and belongs to the field of preparing activated carbon by secondary utilization of waste resources. Background technique [0002] Activated carbon is a porous material with rich pore structure and huge specific surface area. At the same time, the advantages of stable chemical properties make activated carbon widely used in chemical industry, environmental protection, medicine, food and other fields. [0003] At present, the raw materials used to prepare activated carbon at home and abroad can be divided into five categories: (1) vegetable raw materials; (2) mineral raw materials; (3) various wastes; (4) synthetic fiber materials; (5) organic fiber materials. Among them, the use of various waste materials to prepare activated carbon has received great attention, mainly because the raw materials are cheap, and the use o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/10C01B32/336
Inventor 岳钦艳阚渝姣高宝玉傅凯放高原
Owner SHANDONG UNIV
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