CN1130652A - Process for treatment of waste plastics - Google Patents
Process for treatment of waste plastics Download PDFInfo
- Publication number
- CN1130652A CN1130652A CN95101551A CN95101551A CN1130652A CN 1130652 A CN1130652 A CN 1130652A CN 95101551 A CN95101551 A CN 95101551A CN 95101551 A CN95101551 A CN 95101551A CN 1130652 A CN1130652 A CN 1130652A
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- CN
- China
- Prior art keywords
- cracking
- thing
- low molecular
- molecular fluid
- temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
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- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
Abstract
A process for treating waste plastics includes such technological steps as hot-fusing waste plastics into low-molecular fluid, removing impurities, then cracking and fractionating to obtain useful solvent or solid wax, and features simple technology and low cost.
Description
The present invention relates to a kind of waste plastic be handled to obtain the processing method of useful solvent or solid wax.
Along with science and technology development, plastics have become a kind of emerging material, and the kind of plastics is increasing, and the Application Areas of plastics is also more and more wider.At present, comprise polyethylene, the application of a series of plastics such as polypropylene, polyvinyl chloride, polystyrene and polyester almost spreads all over all respects of industrial and agricultural production and people's daily life.But along with extensive, the extensive application of plastics and plastics, various plastic waste and depleted plastics also produce in a large number.According to incompletely statistics, the plastic waste that produced every year of the whole world just reaches up to ten million tons.These plastic waste kinds are numerous and diverse, multifarious, and what have can reclaiming, but also uneconomical economically; What have can't regenerate at all, has become rubbish, even becomes the public hazards of contaminate environment.Particularly, is mingled in the soil after agricultural plastic film is discarded, owing to the growth that can not natural degradation has a strong impact on farm crop.Can not rant out, the harm of plastic waste has become human very important public hazards and formidable enemy.
Purpose of the present invention promptly is to obtain a kind of plastic waste suitably to be handled to obtain the processing method of useful matter, turns waste into wealth with harm and the realization of eliminating plastic waste, makes the best use of everything.
To achieve these goals, the present invention at first steams the thing fractionation with the further heating pyrolyze of low molecular fluid thing after the impurity elimination and with cracking with plastic waste hot melt under suitable temperature for low molecular fluid thing then, obtains useful liquid solvent or solid wax.Be described in further detail below in conjunction with the technical characterictic of specific embodiment the processing method of treatment of waste plastics of the present invention.
The processing method of treatment of waste plastics of the present invention mainly comprises hot melt, cracking and fractionation three process, and handled plastic waste can comprise polyethylene, polypropylene, polystyrene, tetrafluoroethylene, polyvinyl chloride, polyester etc.For the ease of the processing condition of controlling each operation and the specification of final product, preferably plastic waste is classified and handled respectively.
Hot melt operation among the present invention is carried out in hot melting furnace, and hot melting temperature is different different because of plastics kind, is generally 200-600 ℃.Plastic waste becomes low molecular fluid thing behind hot melt, through hot melt and the further heating pyrolyze in cracking still of the low molecular fluid thing after removing non-plastic contaminant, cracking temperature is also different different because of the plastic waste kind, is generally 600-800 ℃.The fractionation operation utilizes fractionator to carry out, and cracking steams thing can obtain liquid solvent or solid wax after fractionation.Condensing temperature can be selected and controls, generally can be divided into below 100 ℃ according to solvent types with to the requirement of final product specification, 100-300 ℃ and 300-500 ℃ of three condensing temperature intervals.The liquid solvent of gained can be composite in addition according to its concrete purposes after the fractionation.
Embodiment 1: the processing of polyethylene plastic waste
The acid polyethylene plastic film is dropped into hot melting furnace and is heated to 200-600 ℃, and the polyethylene waste plastic film promptly becomes low molecular fluid thing.After removing non-plastic contaminant wherein, will hang down the molecular fluid thing and change cracking still over to and be heated to 600-800 ℃ and carry out cracking.Cracking is steamed thing leads people's fractionator, by below 100 ℃, 100-300 ℃ and 300-500 ℃ of three condensing temperature intervals fractionate out three kinds of fractions.300-500 ℃ of fraction is heavy fraction, and major ingredient is a solid wax.Carbon containing 16-22, fusing point are about 30 ℃, and yield can reach 50%.100-300 ℃ of fraction is liquid solvent oil, can be used as coating or industrial chemicals, carbon containing 10-16, and proportion is about 0.75, and fusing point is about-10 ℃, and yield can reach 32%.Fraction below 100 ℃ is water and low boiling point solvent, and carbon containing is below 10, and proportion is about 0.74, and yield can reach 10%.More than the overall recovery of three kinds of fractions can reach 92%, other can be used as fuel at have an appointment 4% byproduct inflammable gas and residue.
Embodiment 2: the processing of polystyrene plastic waste
Drop into the deposed foam of polystyrene plastics in the hot melting furnace and be heated to 200-600 ℃, the low molecular fluid object behind the hot melt is long-pending obviously to be dwindled.To hang down the molecular fluid thing then changes cracking still over to and is heated to 600-800 ℃ and carry out cracking.Cracking is steamed the logical people's fractionator of thing can fractionate out vinylbenzene and toluene mixed solvent, yield can reach 50% and 40% respectively.
Technology of the present invention is simple, with low cost, and solvent that is obtained after the treatment of waste plastics or solid wax have purposes widely.Therefore, the present invention has good economic benefits and social benefit, can be widely used in to handle various plastic waste.
Claims (3)
1, a kind of processing method that is used for treatment of waste plastics, it is characterized in that comprising hot melt, cracking and fractionation three process, promptly at first the plastic waste hot melt is low molecular fluid thing, then with the low molecular fluid thing cracking after the impurity elimination and cracking is steamed the thing fractionation obtain solvent or solid wax.
2, processing method according to claim 1, it is characterized in that at first polyethylene plastic waste hot melt under 200-600 ℃ temperature being low molecular fluid thing, then under 600-800 ℃ temperature with the low molecular fluid thing cracking after the impurity elimination, then cracking is steamed thing by below 100 ℃, interval fractionation obtains the solvent or the solid wax of different carbon content with 300-500 ℃ of three condensing temperature for 100-300 ℃.
3, processing method according to claim 1, it is characterized in that at first polystyrene plastic waste hot melt under 200-600 ℃ temperature is low molecular fluid thing, then with the cracking and cracking is steamed the thing fractionation get vinylbenzene and toluene mixed solvent under 600-800 ℃ of temperature of the low molecular fluid thing after the impurity elimination.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95101551A CN1130652A (en) | 1995-03-03 | 1995-03-03 | Process for treatment of waste plastics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95101551A CN1130652A (en) | 1995-03-03 | 1995-03-03 | Process for treatment of waste plastics |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1130652A true CN1130652A (en) | 1996-09-11 |
Family
ID=5073976
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95101551A Pending CN1130652A (en) | 1995-03-03 | 1995-03-03 | Process for treatment of waste plastics |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1130652A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002057391A1 (en) * | 2001-01-22 | 2002-07-25 | Chen, Yanping | Method and system of converting waste plastics into hydrocarbon oil |
| CN110684258A (en) * | 2018-07-05 | 2020-01-14 | 成都盛腾科技发展有限公司 | Polyethylene modified material and preparation method thereof |
-
1995
- 1995-03-03 CN CN95101551A patent/CN1130652A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002057391A1 (en) * | 2001-01-22 | 2002-07-25 | Chen, Yanping | Method and system of converting waste plastics into hydrocarbon oil |
| US6774271B2 (en) | 2001-01-22 | 2004-08-10 | Tianfu Jiang | Method and system of converting waste plastics into hydrocarbon oil |
| CN110684258A (en) * | 2018-07-05 | 2020-01-14 | 成都盛腾科技发展有限公司 | Polyethylene modified material and preparation method thereof |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |