CN102391657B - Method for modifying asphalt by using pyrolytic oil heavy fraction of waste printed circuit board - Google Patents
Method for modifying asphalt by using pyrolytic oil heavy fraction of waste printed circuit board Download PDFInfo
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- CN102391657B CN102391657B CN 201110292102 CN201110292102A CN102391657B CN 102391657 B CN102391657 B CN 102391657B CN 201110292102 CN201110292102 CN 201110292102 CN 201110292102 A CN201110292102 A CN 201110292102A CN 102391657 B CN102391657 B CN 102391657B
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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
The present invention relates to a kind of method of using waste and old printed circuit board pyrolysis oil last running modifying asphalt, belong to the application technology as the second resource field of electron wastes.
Background technology
Waste and old printed circuit board (PCB) is the basis of electronic industry, is indispensable vitals in each electronic product.Worldwide, the output value of PCB accounts for 18% left and right of electronic component gross industrial output value, and annual sales amount accounts for 19%.According to estimates, WPCB shared proportion in electron wastes is 3% left and right.Because the model change of electronics and information industry gets very soon, the quantity of the WPCB that thereupon produces is also very surprising.Occupy the second in the world since the output of China PCB in 2003, up to the present, the whole world approximately 40% PCB all at domestic product.
Waste printed circuit board (PCB) is a kind of solid waste that has a large capacity and a wide range, and contains 40% the metal of having an appointment, 30% plastics and 30% indifferent oxide in useless PCB, and wherein metal partly has: the precious metals such as gold, palladium, platinum, silver; The rare metal such as rhodium, selenium; The plain metals such as copper, aluminium, iron, nickel, lead, tin and zinc, particularly wherein metallic copper content surpasses 20%, and resourcebility is strong.
At present in old circuit board, the recovery of the high price metal such as copper remains the main direction of old circuit board recycling.And the recycling of nonmetal part research is less, and is in the face of growing environmental stress, the recycling of non-metallic material, extremely urgent.
Utilize pyrolysis method treatment circuit plate, resin part in circuit card effectively can be separated with metal and glass fibre, and be changed into the polymer pyrolysis oil, make the recycling of resin become possibility.Organic pyrolysis oil is rich in many macromolecular organics learns thing, and pyrolysis oil is one of primary product of organic matter pyrolysis, has purposes widely.Studies show that: the pyrolysis oil complicated component, boiling spread is large, and calorific value is high, has the character of similar crude oil.Little when treatment scale, when pyrolysis oil output is low, it is acted as a fuel utilizes simple possible.By normal pressure fractionation pyrolysis oil, obtain light naphthar, heavy naphtha, light petroleum gas and 4 kinds of cuts of heavy oil gas.High temperature cut with higher thermal value is sold as lower grade fuel oil, reclaims use through appropriate hydrogenation and deoxidation, the low temperature fraction petroleum naphtha of processed and the main component that light petroleum gas can be used as gasoline and diesel oil.And heavy constituent can first be carried out the light constituent processing, reduces heavy constituent content, more last residue is used as road bitumen, realizes the total composition reuse of pyrolysis oil.In addition, also having the scholar to propose to contain phenol and isopropyl-phenol etc. in pyrolysis oil is all important Organic Chemicals, is widely used in the fields such as plastics, medicine, agricultural chemicals, dyestuff, coating.Therefore, wiring board pyrolysis oil character is analysed in depth, can be proposed according to this more rationally effectively to utilize method, be conducive to improve the economy that pyrolytic process reclaims abandoned printed circuit board.
Pitch is to pave the way and the huge material of construction of other building field usage quantitys, because the properties of unfilled bitumen can not satisfy now building needs, so there is very early the scholar to carry out research to the asphalt modification field.But up to the present, properties-correcting agent for pitch mostly adopts some expensive macromolecular materials, although these materials can increase substantially the properties of pitch, but increased the use cost of pitch, along with the high speed development of urban road, the usage quantity of various roads with material also increased day by day.Due to resource exhaustion and various raw-material price increase, finding a kind of with low cost and properties-correcting agent that can increase substantially asphalt performance is scholars' research work in nearly stage.
In the recycling of pyrolysis oil, light constituent is low because of boiling point, contains more macromolecule organic for purifying and utilizing, and the recycling difficulty is lower; And the high temperature cut in pyrolysis oil is solid-state under normal temperature, contains a large amount of condensed ring class materials, part of coke and solid residue, find and reasonably utilize approach very difficult.By the high temperature last running in circuit board pyrolytic oil is back to use in road bitumen, as pavement material, on the one hand, can conscientiously improve the high-temperature stability of bituminous pavement, evade the high drawback of traditional asphalt properties-correcting agent valency; On the other hand, the great demand of road construction high speed development to pitch also provides the approach that utilizes of sufficient reuse space and safety for circuit board pyrolytic oil last running.
Summary of the invention
The invention provides a kind of method of using waste and old printed circuit board pyrolysis oil last running modifying asphalt, realize that asphalt performance promotes, reduce the asphalt modifier cost, realize circuit board pyrolytic process in total composition efficient recovery and the resource conversion of pyrolysis oil, for the recycling of total composition after the circuit card vacuum pyrolysis lays the foundation.
For achieving the above object, technical scheme of the present invention adopts following steps:
(1) waste and old circuit board that will remove electronic devices and components is put into pyrolysis oven, is heated to 400～800 ℃, kept 1～1.5 hour, until pyrolysis fully, and collect the pyrolysis oil that produces after pyrolysis;
(2) waste circuit board pyrolytic oil is carried out the normal pressure fractionation, keep pyrolysis oil high temperature last running more than 340 ℃, if appointed condition allows, can improve last running cut point to 360 ℃, make that in heavy constituent, the volatilizable component of low temperature reduces;
(3) be under normal temperature solid-state waste circuit board pyrolytic oil high temperature last running broken, grind and sieve, choose greater than 200 purpose last running powder as asphalt modifier;
(4) be that to join parts by weight as properties-correcting agent be that in the petroleum pitch of 130～160 ℃ of 90～98 parts, insulated and stirred 0.5～1 hour obtains modifying asphalt for the waste circuit board pyrolytic oil last running of 2～10 parts with parts by weight.
The parts by weight of above-mentioned steps (4) PetroChina Company Limited. pitch are 98 parts, and the parts by weight of waste circuit board pyrolytic oil last running are 2 parts.
In step 4, for different purposes and requirement, can by changing the ratio of pitch and properties-correcting agent, reach change pitch penetration degree, softening temperature, the stability of ductility and asphalt.
Beneficial effect of the present invention is:
(1) effectively fill up the blank of high temperature heavy constituent comprehensive utilization of resources in circuit board pyrolytic oil, meet the requirement of the current recycling economy development of China, and higher resource organic efficiency is arranged.
(2) join in pitch as properties-correcting agent with this pyrolysis oil heavy constituent, can increase substantially each performance of pitch and asphalt.
(3) with the waste printed circuit board pyrolysis product as properties-correcting agent, decrease the cost of asphalt modifier, the feasibility that asphalt modifier widely applies in engineering is increased.
Description of drawings
Fig. 1 is the schematic flow sheet of the inventive method.
Embodiment
Further illustrate the present invention below by embodiment.
Embodiment 1
(1) circuit card that will remove electronic devices and components is put into pyrolysis oven, is heated to 450 ℃, kept 1 hour, until pyrolysis fully, and collect the pyrolysis oil that produces after pyrolysis;
(2) circuit board pyrolytic oil is carried out the normal pressure fractionation, keep pyrolysis oil high temperature last running more than 340 ℃, if appointed condition allows, can improve last running cut point to 360 ℃, to reduce volatilizable component in heavy constituent;
(3) grind and sieve being solid-state circuit board pyrolytic oil high temperature last running under normal temperature, choosing greater than 200 purpose last running powder as the pitch admixture;
(4) be that to join parts by weight as properties-correcting agent be that in the hot petroleum pitch of 130～160 ℃ of 98 parts, insulated and stirred 0.5 hour obtains modifying asphalt for the circuit board pyrolytic oil last running of 2 parts with parts by weight.
51.9 ℃ of this modifying asphalt softening temperatures, penetration degree 7.31mm, 15 ℃ of ductilities are 51.4cm, and bitumen aggregate ratio is that 4.5 o'clock Marshall stabilitys are 16.8kN, and rut experiment dynamic stability is 9893.43.
Embodiment 2
With embodiment 1, difference is that in step (1), the pyrolysis oven Heating temperature is 500 ℃, and the hold-time is 1.5 hours; Be that to join parts by weight as properties-correcting agent be that in the hot petroleum pitch of 130～160 ℃ of 95 parts, insulated and stirred 0.75 hour obtains modifying asphalt for the circuit board pyrolytic oil last running of 5 parts with parts by weight in step (4).
53.1 ℃ of this modifying asphalt softening temperatures, penetration degree 7.24mm, 15 ℃ of ductilities are 42.7cm, and bitumen aggregate ratio is that 4.5 o'clock Marshall stabilitys are 19.4kN, and rut experiment dynamic stability is 10161.29.
Embodiment 3
With embodiment 1, difference is that in step (1), the pyrolysis oven Heating temperature is 550 ℃, and the hold-time is 2 hours; Be that to join parts by weight as properties-correcting agent be that in the hot petroleum pitch of 130～160 ℃ of 90 parts, insulated and stirred 1 hour obtains modifying asphalt for the circuit board pyrolytic oil last running of 10 parts with parts by weight in step (4).
54.7 ℃ of this modifying asphalt softening temperatures, penetration degree 4.48mm, 15 ℃ of ductilities are 37.5cm, and bitumen aggregate ratio is that 4.5 o'clock Marshall stabilitys are 18.7kN, and rut experiment dynamic stability is 12504.72.
Claims (2)
1. a method of using waste and old printed circuit board pyrolysis oil last running modifying asphalt, is characterized in that comprising the steps:
(1) waste and old circuit board that will remove electronic devices and components is put into pyrolysis oven, is heated to 400～800 ℃, kept 1～1.5 hour, until pyrolysis fully, and collect the pyrolysis oil that produces after pyrolysis;
(2) waste circuit board pyrolytic oil is carried out the normal pressure fractionation, keep pyrolysis oil high temperature last running more than 360 ℃;
(3) be under normal temperature solid-state waste circuit board pyrolytic oil high temperature last running broken, grind and sieve, choose greater than 200 purpose last running powder as asphalt modifier;
(4) be that to join parts by weight as properties-correcting agent be that in the petroleum pitch of 130～160 ℃ of 90～98 parts, insulated and stirred 0.5～1 hour obtains modifying asphalt for the waste circuit board pyrolytic oil last running of 2～10 parts with parts by weight.
2. method according to claim 1 is characterized in that: the parts by weight of above-mentioned steps (4) PetroChina Company Limited. pitch are 98 parts, and the parts by weight of waste circuit board pyrolytic oil last running are 2 parts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 201110292102 CN102391657B (en) | 2011-09-29 | 2011-09-29 | Method for modifying asphalt by using pyrolytic oil heavy fraction of waste printed circuit board |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110292102 CN102391657B (en) | 2011-09-29 | 2011-09-29 | Method for modifying asphalt by using pyrolytic oil heavy fraction of waste printed circuit board |
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| CN102391657A CN102391657A (en) | 2012-03-28 |
| CN102391657B true CN102391657B (en) | 2013-06-12 |
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| CN108424662A (en) * | 2018-03-29 | 2018-08-21 | 郑州航空工业管理学院 | A kind of road Biological asphalt material and preparation method thereof |
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| JP5509514B2 (en) * | 2005-11-21 | 2014-06-04 | 日立化成株式会社 | Epoxy resin molding material for sealing and electronic component device |
| CN102190896B (en) * | 2010-03-15 | 2013-02-20 | 上海新禹固废处理有限公司 | Method for recycling waste electronic circuit board and recycled asphalt by using same |
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Non-Patent Citations (3)
| Title |
|---|
| 孙冬雪.废轮胎热解油重质馏分制备的道路沥青老化性能研究.《燃料化学学报》.2011,第39卷(第5期), |
| 孙路石.废弃印刷线路板的热解机理及产物回收利用的实验研究.《中国优秀博硕士学位论文全文数据库（博士）工程科技I辑》.2005, * |
| 废轮胎热解油重质馏分制备的道路沥青老化性能研究;孙冬雪;《燃料化学学报》;20110515;第39卷(第5期);第396页第2栏、第399页第2栏结论部分 * |
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