CN1061420A - A kind of process for recovery and regeneration of waste plastics - Google Patents
A kind of process for recovery and regeneration of waste plastics Download PDFInfo
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- CN1061420A CN1061420A CN90109251A CN90109251A CN1061420A CN 1061420 A CN1061420 A CN 1061420A CN 90109251 A CN90109251 A CN 90109251A CN 90109251 A CN90109251 A CN 90109251A CN 1061420 A CN1061420 A CN 1061420A
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- plastics
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- plastic waste
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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
The invention provides a kind of method of reclaiming plastic waste.Present method is applicable to the solubility plastic waste.The characteristics of present method are, with solvent plastic waste are dissolved under 80～200 ℃ of conditions, add the decolorizing purification agent simultaneously, and the impurity in the absorption lysate then, filters out impurities and scavenging agent with filtering method.The temperature of dividing gradient to reduce filtrate is again carried out secondary filtration and three filtrations, leaches the plastics and the degraded product that will reclaim---small molecular weight plastics.Three filtrates are that pure solvent can be recycled.Remove solvent in the filter cake with the decompression heating vaporization, can obtain the plastic prod and the small molecular weight plastics of waste residue, recovery respectively.Present method adaptability to raw material is wide, the impurity removal percentage height, and the product colour of recovery is white, quality good, and is fit to large-scale continuous production.
Description
The present invention relates to a kind of process for recovery and regeneration of waste plastics.
Existing process for recovery and regeneration of waste plastics is that screw plastics extruder extruding pelletization under 200～230 ℃ of temperature reclaims.But this method has the following disadvantages; The one, can not isolate the impurity in the plastic waste effectively, the 2nd, the waste product of different colours can not hybrid process, and the 3rd, can not separate the degraded product in the plastic waste.Therefore, the poor product quality that this kind method reclaims, color is black, and use value is low.In addition, according to " plastic news " first phase in 1989 report, developed a kind of recovery method of thermo-cracking plastic waste abroad.But the investment of this kind method is high, and the rate of recovery is low, and the product of recovery is a liquid fuel.Use value than plastics is low.
The impurity that task of the present invention is that exploitation is a kind of in can the deep removal plastic waste, and can remove the color and the degraded product of plastic waste makes the plastic waste quality of recovery approach the reclaiming method of new plastic.
Method of the present invention is applicable to the solvent soluble plastic waste.
Task of the present invention is finished by following method.Can both be dissolved in a certain solvent according to the solubility plastic waste, and its solubility with temperature and plastic waste molecular weight and the characteristics that change, in plastic waste, add high-temperature solvent,, and in lysate, add the solid purificant to adsorb impurity and color in the plastic waste its dissolving.Then, under solvent temperature, filter, isolate the solid purificant that is adsorbed with impurity.Contain dissolved plastics and low-molecular-weight degraded product in the filtrate.When reducing the temperature of filtrate, the macromolecule plastics can be separated out because of the first crystallization of the decline of the solubleness in lysate, at this moment carry out the second time and filter, and leach the plastics that will reclaim.Degraded product is less because of its molecular weight, and the solubleness in lysate is big, also stays in the secondary filtrate.Reduce the temperature of secondary filtrate again, filter for the third time, leach degraded product.Three times filtrate is a pure solvent, can be used as novel solvent and recycles.Remove the solvent in filter cake, secondary filter cake, three filter cakes, can obtain the plastic prod of waste residue, recovery and the degraded product of small molecular weight respectively.Remove the solvent in the filter cake, can use heating vaporization.
The present invention is owing to adopted dissolving, scavenging agent refining with adsorbents, filtering separation to remove the reclaiming method of impurity and degraded product, so present method adaptability to raw material is wide, the product colour of recovery is white, the impurity removal percentage height, and quality is good.And present method technical process is simple, and solvent cycle is used.Exhausted most solvent needn't evaporate recovery, and energy consumption is low.Because of present method does not have the High Temperature High Pressure process, thereby general machinery equipment is promptly applicable, and can carry out large-scale continuous production.Idiographic flow synoptic diagram of the present invention is provided by accompanying drawing.
Fig. 1 is the process flow diagram of the design according to the present invention.
Be example to reclaim wasting polypropylene plastic below, in conjunction with Fig. 1, the details and the working condition of the concrete device that foundation the present invention is proposed are elaborated.
Reclaim polypropylene waste plastics, select for use aromatic hydrocarbon as solvent.The solvent of selecting for use in this routine scheme is a toluene.With carclazyte, perhaps bentonite in powder and perlite powder are scavenging agent, and waste polypropylene is joined the dissolving vessel (2) from charging opening (1), add solid purificant and solvent then in jar (2).Solvent adds than being 10～30: 1 with the weight of plastic waste, and the scavenging agent add-on is 1～30% of a plastic waste.By well heater (5) temperature of solvent is risen to 80～200 ℃, the temperature of dissolving vessel (2) is raise, start agitator (3) simultaneously.Lysate is extracted out by pump (4) and is sent into strainer (machine) (6), filters out scavenging agent and impurity under 80～200 ℃ of temperature.Filtrate sends into interchanger (8) by pump (7) extraction and water cooler (9) is cooled to 25～50 ℃, enters strainer (machine) (10) and carries out the filtration second time.The polypropylene that crystallization is separated out from filtrate owing to lower the temperature is filtered off, and is trapped in the secondary filtration filter cake.The secondary filtrate is extracted out by pump (11) and is sent into water cooler (12) and further be cooled to-10～40 ℃ again and enter strainer (machine) (13) and filter for the third time.The low-molecular-weight polypropylene that leaches is trapped in three filtering filter cakes.Three filtrates are pure solvent, send back to solvent tank by pump (14) and 2. recycle.Filter cake, secondary filter cake and three filter cakes are respectively charged among three jars (15), (16), (17) of heating installation, evaporate the solvent that wherein contains.The evaporative process of solvent is achieved in that the heating installation of opening filter cake jar (15), (16), (17) in the filter cake, the temperature that keeps the filter cake jar is at 55～85 ℃, with vacuum pump (18) filter cake jar (15), (16), (17) are evacuated, in it, are blown into rare gas element simultaneously from the bottom.Under vacuum condition, evaporate the solvent in the filter cake.After the solvent evaporation, through vacuum pump (18) compression and by water cooler (19) cooling condensation.The solvent of condensation is delivered to solvent tank (20) and is recycled.After solvent evaporation is clean, emit the acrylic plastering and the degraded product-small molecular weight polypropylene of waste residue, recovery respectively from drain hole (21), (22), (23).
Claims (3)
1, a kind of process for recovery and regeneration of waste plastics.It is characterized in that plastic waste being dissolved with solvent.With the impurity in the filtering method filtering lysate.With the reduction method of temperature plastics crystallization from lysate is separated out.Different according to plastics with the Tc of degraded product in lysate, under different temperature, carry out twice or multiple times of filtration, can leach the plastics of recovery and the degraded product of various molecular weight-small molecular weight plastics respectively.
2, by the described process for recovery and regeneration of waste plastics of claim 1, it is characterized in that adding the solvent that can dissolve plastic waste at a certain temperature, made dissolving plastic.
3, by the described process for recovery and regeneration of waste plastics of claim 1, it is characterized in that having added solid purificant, be used for adsorbing, making with extra care the impurity and the color of plastic waste, and make it to help filtering separation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN90109251A CN1061420A (en) | 1990-11-16 | 1990-11-16 | A kind of process for recovery and regeneration of waste plastics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN90109251A CN1061420A (en) | 1990-11-16 | 1990-11-16 | A kind of process for recovery and regeneration of waste plastics |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1061420A true CN1061420A (en) | 1992-05-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN90109251A Pending CN1061420A (en) | 1990-11-16 | 1990-11-16 | A kind of process for recovery and regeneration of waste plastics |
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| Country | Link |
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| CN (1) | CN1061420A (en) |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101100528B (en) * | 2007-06-25 | 2011-03-30 | 张强 | Decoloration and regeneration using method for polyvinyl butyral (PVB) resin colorant |
| CN102256760A (en) * | 2008-12-18 | 2011-11-23 | 金敬洙 | Method for waste eps recycling |
| CN101575421B (en) * | 2009-06-24 | 2012-11-21 | 合肥工业大学 | Method for recovering polypropylene in leftovers of filament tow mouth bar of waste polypropylene |
| CN102786712A (en) * | 2012-07-20 | 2012-11-21 | 合肥工业大学 | Device regenerating waste and old thermosetting plastics, and technology thereof |
| CN103524780A (en) * | 2013-08-26 | 2014-01-22 | 深圳百亿莱实业有限公司 | Method for extracting polyethylene from polyethylene white garbage |
| CN104693479A (en) * | 2015-02-28 | 2015-06-10 | 江苏高科物流科技股份有限公司 | Method for quickly degrading plastics |
| CN104710601A (en) * | 2015-01-23 | 2015-06-17 | 广东树业环保科技股份有限公司 | Method for preparing highly pure PET slice through decoloring recovery of waste PET materials, and product thereof |
| CN105061735A (en) * | 2015-08-19 | 2015-11-18 | 树业环保科技股份有限公司 | Method for manufacturing PET film through recycling waste PET material |
| CN109679137A (en) * | 2018-12-20 | 2019-04-26 | 树业环保科技股份有限公司 | A kind of the reclaiming system and technique of waste and old polycarbonate |
| CN113862018A (en) * | 2020-06-30 | 2021-12-31 | 中国石油化工股份有限公司 | Method and system for producing vehicle fuel from waste plastics |
| CN114479901A (en) * | 2020-10-28 | 2022-05-13 | 中国石油化工股份有限公司 | Waste plastic pretreatment method and system |
| CN114507540A (en) * | 2020-10-28 | 2022-05-17 | 中国石油化工股份有限公司 | Recovery processing method and system for waste plastics |
| CN115920959A (en) * | 2021-10-01 | 2023-04-07 | 南亚塑胶工业股份有限公司 | Ionic liquid catalyst and its preparation method |
| CN116000047A (en) * | 2021-10-22 | 2023-04-25 | 中国石油化工股份有限公司 | Combined pretreatment method and system for waste plastics |
| CN116023962A (en) * | 2021-10-26 | 2023-04-28 | 中国石油化工股份有限公司 | Method and system for pyrolyzing waste plastic tube furnace |
-
1990
- 1990-11-16 CN CN90109251A patent/CN1061420A/en active Pending
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101100528B (en) * | 2007-06-25 | 2011-03-30 | 张强 | Decoloration and regeneration using method for polyvinyl butyral (PVB) resin colorant |
| CN102256760A (en) * | 2008-12-18 | 2011-11-23 | 金敬洙 | Method for waste eps recycling |
| CN101575421B (en) * | 2009-06-24 | 2012-11-21 | 合肥工业大学 | Method for recovering polypropylene in leftovers of filament tow mouth bar of waste polypropylene |
| CN102786712A (en) * | 2012-07-20 | 2012-11-21 | 合肥工业大学 | Device regenerating waste and old thermosetting plastics, and technology thereof |
| CN102786712B (en) * | 2012-07-20 | 2014-04-30 | 合肥工业大学 | Device for regenerating waste and old thermosetting plastics, and technology thereof |
| CN103524780B (en) * | 2013-08-26 | 2016-01-20 | 深圳百亿莱实业有限公司 | Poly extracting method in polyethylene white garbage |
| CN103524780A (en) * | 2013-08-26 | 2014-01-22 | 深圳百亿莱实业有限公司 | Method for extracting polyethylene from polyethylene white garbage |
| CN104710601B (en) * | 2015-01-23 | 2016-08-24 | 树业环保科技股份有限公司 | Method and the goods preparing high-purity PET section are reclaimed in the decolouring of waste PET material |
| CN104710601A (en) * | 2015-01-23 | 2015-06-17 | 广东树业环保科技股份有限公司 | Method for preparing highly pure PET slice through decoloring recovery of waste PET materials, and product thereof |
| CN104693479A (en) * | 2015-02-28 | 2015-06-10 | 江苏高科物流科技股份有限公司 | Method for quickly degrading plastics |
| CN105061735A (en) * | 2015-08-19 | 2015-11-18 | 树业环保科技股份有限公司 | Method for manufacturing PET film through recycling waste PET material |
| CN109679137A (en) * | 2018-12-20 | 2019-04-26 | 树业环保科技股份有限公司 | A kind of the reclaiming system and technique of waste and old polycarbonate |
| CN113862018A (en) * | 2020-06-30 | 2021-12-31 | 中国石油化工股份有限公司 | Method and system for producing vehicle fuel from waste plastics |
| CN114479901A (en) * | 2020-10-28 | 2022-05-13 | 中国石油化工股份有限公司 | Waste plastic pretreatment method and system |
| CN114507540A (en) * | 2020-10-28 | 2022-05-17 | 中国石油化工股份有限公司 | Recovery processing method and system for waste plastics |
| CN114507540B (en) * | 2020-10-28 | 2023-05-05 | 中国石油化工股份有限公司 | Recovery processing method and system for waste plastics |
| CN114479901B (en) * | 2020-10-28 | 2023-06-09 | 中国石油化工股份有限公司 | Pretreatment method and system for waste plastics |
| CN115920959A (en) * | 2021-10-01 | 2023-04-07 | 南亚塑胶工业股份有限公司 | Ionic liquid catalyst and its preparation method |
| CN116000047A (en) * | 2021-10-22 | 2023-04-25 | 中国石油化工股份有限公司 | Combined pretreatment method and system for waste plastics |
| CN116023962A (en) * | 2021-10-26 | 2023-04-28 | 中国石油化工股份有限公司 | Method and system for pyrolyzing waste plastic tube furnace |
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