CN104693479A - Method for quickly degrading plastics - Google Patents
Method for quickly degrading plastics Download PDFInfo
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- CN104693479A CN104693479A CN201510090903.8A CN201510090903A CN104693479A CN 104693479 A CN104693479 A CN 104693479A CN 201510090903 A CN201510090903 A CN 201510090903A CN 104693479 A CN104693479 A CN 104693479A
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- Prior art keywords
- plastics
- solvent
- products
- dissolved
- reclaimed
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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
Abstract
The invention discloses a method for quickly degrading plastics. The method comprises the following steps: dissolving waste plastics with methylbenzene or DMSO; removing impurities in a dissolved solution by using a filter method; crystallizing and separating plastics from the dissolved solution by using a temperature reduction method; filtering twice or multiple times at different temperatures to respectively filter reclaimed plastics and dissolved products, namely small-molecular-weight plastics, with various molecular weights due to the fact that plastics and dissolved products have different crystallizing temperatures in the dissolved solution. By adopting a recycling and regenerating method comprising steps of dissolving, adsorbing and refining purifying agents, filtering, separating and removing impurities and degrading products, the method has wide raw material adaptability, white color of reclaimed products, high impurity removal rate and high quality; and the method is simple in process flow, and the solvent can be recycled. Most solvent does not need to be evaporated or reclaimed, and energy consumption is low.
Description
Technical field
The present invention relates to a kind of method of degradative plastics, particularly a kind of method utilizing the quick effectively degradative plastics of chemical, belongs to environmental technology field.
Background technology
Plastics are raw material based on synthetic resins or natural resin, adds (or not adding) various additives for plastics, strongthener and filler, and under certain temperature, pressure, the type of making is moulded in processing or crosslinking curing is shaping, the solid material obtained or goods.Plastics refer to resin (or using monomer direct polymerization in the course of processing) as main component, with additives such as softening agent, weighting agent, lubricant, tinting materials for ancillary component, the material of energy flowing forming in the course of processing, be the macromolecular compound of synthesis, freely can change body styles.Utilize the material that raw material monomer is polymerized with synthesis or condensation reaction, be made up of additives such as synthetic resins and filler, softening agent, stablizer, lubricant, colorants, its main component is synthetic resins.
Although it is very large convenient that plastics bring to the life of people, the not soluble recyclability of plastics also annoyings environmentalist always, and people do not know how this reclaims the plastics of degrading waste.
Existing process for recovery and regeneration of waste plastics is that Screw type plastic extruder extruding pelletization at 200 ~ 230 DEG C of temperature reclaims.But this method has the following disadvantages; One is the impurity can not effectively isolated in plastic waste, and two is that the waste product of different colours can not hybrid process, and three is the degraded products that can not be separated in plastic waste.Therefore, the poor product quality that this kind of method reclaims, color is black, and use value is low.In addition, although also develop now a kind of recovery method of thermo-cracking plastic waste.But this kind of method investment is high, and the rate of recovery is low, and the product of recovery is liquid fuel.Low compared with the use value of plastics.
Summary of the invention
For the deficiencies in the prior art, the problem to be solved in the present invention is, provides a kind of method of fast degradation plastics, can impurity in deep removal plastic waste, and can remove color and the degraded product of plastic waste.
In order to solve the problem, the technical solution used in the present invention is as follows:
A method for fast degradation plastics, the method comprises:
With solvent, plastic waste is dissolved, with the impurity in the method filtering lysate filtered, plastics crystallization from lysate is made by the method reducing temperature, different from the Tc of degraded product in lysate according to plastics, carry out twice at different temperature or multiple times of filtration, the plastics of recovery and the degraded product-small-molecular-weight plastics of various molecular weight can be leached respectively.
Further, the method comprises the solvent adding and can dissolve plastic waste at a certain temperature, makes dissolving plastic.
Further, the method also adds solid purificant, the impurity for adsorbing, in refining plastic waste and color, and makes it to be conducive to filtering separation.
Concrete, described temperature is greater than 200 DEG C.
Importantly, described solvent is toluene or DMSO.
By adopting preceding solution, the invention has the beneficial effects as follows:
The present invention is owing to have employed the reclaiming method of dissolving, scavenging agent refining with adsorbents, filtering separation imurity-removal and degraded product, so present method adaptability to raw material is wide, the product colour of recovery is white, and impurity removal percentage is high, and quality is good.And present method technical process is simple, solvent cycle uses.Exhausted most solvent need not evaporate recovery, and energy consumption is low.
Embodiment
Describe embodiments of the present invention in detail below with reference to specific embodiment, to the present invention, how utilisation technology means solve technical problem whereby, and the implementation procedure reaching technique effect can fully understand and implement according to this.
The present embodiment is to reclaim polypropylene waste plastics.
The present embodiment selects aromatic hydrocarbon as solvent.The solvent selected in this routine scheme is toluene.With carclazyte, or bentonite in powder and perlite powder are scavenging agent, join dissolving vessel, then in tank, add solid purificant and solvent by waste polypropylene from charging opening.Solvent and the weight of plastic waste add than being 15 ~ 25: 1, and scavenging agent add-on is 2 ~ 20% of plastic waste.By well heater, the temperature of solvent is risen to 90 ~ 180 DEG C, the temperature of dissolving vessel is raised, starts agitator simultaneously.Lysate is extracted out by pump and is sent into strainer (machine), filters out scavenging agent and impurity at 90 ~ 180 DEG C of temperature.Filtrate extracts feeding interchanger out by pump and water cooler is cooled to 35 ~ 45 DEG C, enters strainer (machine) and carries out second time filtration.Due to cooling, from filtrate, the polypropylene of crystallization is filtered off, and is trapped in secondary filtration filter cake.Secondary filtrate by pump extract out send into water cooler be cooled to further again-1 ~ 30 DEG C enter strainer (machine) carry out third time filtration.The low-molecular-weight polypropylene leached is trapped in the filter cake filtered for three times.Three filtrates are pure solvent, recycle by being pumped back to solvent tank.One time filter cake, secondary filter cake and three filter cakes are respectively charged among three tanks of heating installation, evaporate the solvent wherein contained.In filter cake, the evaporative process of solvent is achieved in that the heating installation opening filter cake tank, keeps the temperature of filter cake tank at 65 ~ 80 DEG C, is evacuated by filter cake tank with vacuum pump, simultaneously from bottom to being blown into rare gas element in it.Evaporate the solvent in filter cake under vacuum.After solvent evaporation, through vacuum pump compression and by water cooler cooling condensation.The solvent of condensation is delivered to solvent tank and is recycled.After solvent evaporation is clean, release waste residue, the acrylic plastering of recovery and degraded product-small-molecular-weight polypropylene respectively from drain hole.
The present embodiment is owing to have employed the reclaiming method of dissolving, scavenging agent refining with adsorbents, filtering separation imurity-removal and degraded product, so present method adaptability to raw material is wide, the product colour of recovery is white, and impurity removal percentage is high, and quality is good.And present method technical process is simple, solvent cycle uses.Exhausted most solvent need not evaporate recovery, and energy consumption is low.
Above-mentioned embodiment; be only and technical conceive of the present invention is described; object is to allow the stakeholder being familiar with technique implement according to this; but above said content does not limit the scope of the invention; every any equivalence done according to spirit of the present invention changes or modifies, and all should fall within protection scope of the present invention.
Claims (5)
1. a method for fast degradation plastics, is characterized in that, the method comprises:
With solvent, plastic waste is dissolved, with the impurity in the method filtering lysate filtered, plastics crystallization from lysate is made by the method reducing temperature, different from the Tc of degraded product in lysate according to plastics, carry out twice at different temperature or multiple times of filtration, the plastics of recovery and the degraded product-small-molecular-weight plastics of various molecular weight can be leached respectively.
2. the method for a kind of fast degradation plastics according to claim 1, is characterized in that, the method comprises the solvent adding and can dissolve plastic waste at a certain temperature, makes dissolving plastic.
3. the method for a kind of fast degradation plastics according to claim 1, it is characterized in that, the method also adds solid purificant, the impurity for adsorbing, in refining plastic waste and color, and makes it to be conducive to filtering separation.
4. the method for a kind of fast degradation plastics according to claim 2, it is characterized in that, described temperature is greater than 200 DEG C.
5. the method for a kind of fast degradation plastics according to claim 2, is characterized in that, described solvent is toluene or DMSO.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510090903.8A CN104693479A (en) | 2015-02-28 | 2015-02-28 | Method for quickly degrading plastics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510090903.8A CN104693479A (en) | 2015-02-28 | 2015-02-28 | Method for quickly degrading plastics |
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| Publication Number | Publication Date |
|---|---|
| CN104693479A true CN104693479A (en) | 2015-06-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510090903.8A Pending CN104693479A (en) | 2015-02-28 | 2015-02-28 | Method for quickly degrading plastics |
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| CN (1) | CN104693479A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105175146A (en) * | 2015-09-27 | 2015-12-23 | 常州市奥普泰科光电有限公司 | Method for preparing flower nutrient soil by degrading agricultural films |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1061420A (en) * | 1990-11-16 | 1992-05-27 | 刘宏仁 | A kind of process for recovery and regeneration of waste plastics |
| CN101307150A (en) * | 2008-07-10 | 2008-11-19 | 昆明理工大学 | Novel method for recovering waste and old polystyrol |
| CN102911396A (en) * | 2012-10-22 | 2013-02-06 | 广东树业环保科技股份有限公司 | Process for recovering waste polyethylene glycol terephthalate (PET) material |
-
2015
- 2015-02-28 CN CN201510090903.8A patent/CN104693479A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1061420A (en) * | 1990-11-16 | 1992-05-27 | 刘宏仁 | A kind of process for recovery and regeneration of waste plastics |
| CN101307150A (en) * | 2008-07-10 | 2008-11-19 | 昆明理工大学 | Novel method for recovering waste and old polystyrol |
| CN102911396A (en) * | 2012-10-22 | 2013-02-06 | 广东树业环保科技股份有限公司 | Process for recovering waste polyethylene glycol terephthalate (PET) material |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105175146A (en) * | 2015-09-27 | 2015-12-23 | 常州市奥普泰科光电有限公司 | Method for preparing flower nutrient soil by degrading agricultural films |
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Application publication date: 20150610 |
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