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Method for modifying asphalt by using pyrolytic oil heavy fraction of waste printed circuit board

A technology for used circuit boards and printed circuit boards, which is applied in the field of resource utilization of electronic waste, can solve the problems of increasing the cost of asphalt, increasing the use of various road materials, and being expensive, and achieves improved performance and feasibility. The effect of increasing and reducing costs

Inactive Publication Date: 2013-06-12
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But so far, most of the modifiers for asphalt use some expensive polymer materials. Although these materials can greatly improve the performance of asphalt, they increase the cost of asphalt. With the rapid development of urban roads, The use of various road materials is also increasing

Method used

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  • Method for modifying asphalt by using pyrolytic oil heavy fraction of waste printed circuit board

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Put the circuit board with electronic components removed into a pyrolysis furnace, heat it to 450°C, keep it for 1 hour until it is completely pyrolyzed, and collect the pyrolysis oil produced after pyrolysis;

[0024] (2) Fractionate the circuit board pyrolysis oil at atmospheric pressure, and retain the high-temperature heavy fraction of the pyrolysis oil above 340°C. If the equipment conditions permit, the fractionation temperature of the heavy fraction can be increased to 360°C to reduce the volatile components in the heavy fraction;

[0025] (3) Grind and sieve the high-temperature heavy fraction of circuit board pyrolysis oil that is solid at room temperature, and select the heavy fraction powder greater than 200 meshes as an asphalt admixture;

[0026] (4) Add 2 parts by weight of the heavy fraction of circuit board pyrolysis oil as a modifier to 98 parts by weight of hot petroleum asphalt at 130-160°C, heat and stir for 0.5 hours to obtain modified asphalt ....

Embodiment 2

[0029] With embodiment 1, difference is that in the step (1), the heating temperature of the pyrolysis furnace is 500 DEG C, and the holding time is 1.5 hours; in the step (4), the circuit board pyrolysis oil heavy fraction of 5 parts by weight is used as The modifying agent is added to 95 parts by weight of the hot petroleum asphalt at 130-160 DEG C, and the modified asphalt is obtained by stirring for 0.75 hours while maintaining the temperature.

[0030] The softening point of the modified asphalt is 53.1°C, the penetration is 7.24mm, the ductility at 15°C is 42.7cm, the Marshall stability is 19.4kN when the asphalt ratio is 4.5, and the dynamic stability of the rutting test is 10161.29.

Embodiment 3

[0032] With embodiment 1, difference is that in the step (1), the heating temperature of the pyrolysis furnace is 550 ℃, and the holding time is 2 hours; in the step (4), the circuit board pyrolysis oil heavy fraction that is 10 parts by weight is used as The modifying agent is added to 90 parts by weight of the hot petroleum asphalt at 130-160 DEG C, and the modified asphalt is obtained by stirring for 1 hour at heat preservation.

[0033] The softening point of the modified asphalt is 54.7°C, the penetration is 4.48mm, the ductility at 15°C is 37.5cm, the Marshall stability is 18.7kN when the asphalt ratio is 4.5, and the dynamic stability of the rutting test is 12504.72.

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Abstract

The invention discloses a method for modifying asphalt by using pyrolytic oil heavy fraction of a waste printed circuit board. The crushed pyrolytic oil high-temperature heavy fraction powder of the waste printed board, which is used as a modifier is added into the asphalt so as to improve the high temperature performance of road asphalt, and greatly improve rolling resistance and stability of the road asphalt; the high-temperature fraction in the pyrolytic oil of the waste printed circuit board is extracted by fractionation, and is crushed and sieved at high temperature, heavy fraction powder of which the grain size is greater than 200 meshes is used as the asphalt modifier, and 2 to 10 weight parts of pyrolytic oil heavy fraction of the waste printed circuit board, which is used as the modifier is added into 90 to 98 weight parts of petroleum asphalt at the temperature of between 130 and 160 DEG C to form a mixture and the mixture is stirred under the condition of heat preservation for 0.5 and 1 hour to form the modified asphalt; and in the method, all components of a liquid product which is obtained after a circuit board is treated by a pyrolysis method are utilized, the performance of asphalt is improved and the cost of the modified asphalt is reduced.

Description

technical field [0001] The invention relates to a method for modifying asphalt by using the heavy fraction of pyrolysis oil from waste printed circuit boards, and belongs to the technical field of resource utilization of electronic waste. Background technique [0002] Waste printed circuit board (PCB) is the foundation of the electronics industry and an indispensable and important component in various electronic products. Worldwide, the output value of PCB accounts for about 18% of the total output value of the electronic components industry, and the annual sales account for about 19%. It is estimated that WPCB accounts for about 3% of e-waste. Due to the rapid replacement of products in the electronics and information industries, the resulting number of WPCBs is also amazing. Since 2003, my country's PCB production ranks second in the world. So far, about 40% of the world's PCBs are produced in China. [0003] Waste printed circuit board (PCB) is a kind of solid waste wi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08L91/00C10G1/00C10G7/00
Inventor 孙水裕杨帆钟胜宋卫锋戴文灿刘敬勇谢武明李神勇
Owner GUANGDONG UNIV OF TECH
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