CN103224646A - Novel technological method for recovering waste polystyrene foam plastics - Google Patents
Novel technological method for recovering waste polystyrene foam plastics Download PDFInfo
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- CN103224646A CN103224646A CN2013101792766A CN201310179276A CN103224646A CN 103224646 A CN103224646 A CN 103224646A CN 2013101792766 A CN2013101792766 A CN 2013101792766A CN 201310179276 A CN201310179276 A CN 201310179276A CN 103224646 A CN103224646 A CN 103224646A
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- mixed solvent
- waste
- solvent
- porous plastics
- hexene
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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 relates to a novel technological method for recovering waste polystyrene foam plastics. The novel technological method comprises the following steps of: a, crushing the waste polystyrene foam plastics to form particles; b, adding a solvent and stirring the polystyrene foam plastic particles with the solvent being added; c, filtering; d, adding a precipitator to the filtrate produced in the step c; e, filtering, namely filtering the mixture obtained in the step d, wherein granular materials are recovered polystyrene foam plastic particles; and f, fractionating, namely fractionating the solution obtained after filtration in the step e, and separating ingredients in the mixed solvent and the precipitator. As the mixed solvent and the precipitator are used in a matching manner, the technological method is simple to operate; and in addition, the cost of the recovered waste polystyrene foam plastics is greatly reduced as the mixed solvent and the precipitator can be circularly used, and the recycling of the waste polystyrene foam plastics can be facilitated; and therefore the technological method has higher social and economic benefits.
Description
Technical field
The present invention relates to a kind of processing method, be specifically related to waste and old polyphenyl hexene porous plastics and reclaim new process.
Background technology
Polystyrene foamed plastics with light weight, intensity height, corrosion-resistant, to advantages such as the water vapour barrier property are good, become the main raw of packaging industry, be referred to as by people " White Revolution ".Along with the development of industrial economy and improving constantly of living standards of the people, plastics occupy the status that becomes more and more important in people work life.Meanwhile, waste plastic also is on the increase, and pollution problem is following, white pollution, white garbage have occurred.Recycling to waste old polystyrene foamed plastic not only helps preserving the ecological environment, and China's economy and society are continued to develop healthily to have important practical significance.Scientific and Technological Institutes Of Zhejiang's journal (the 22nd the 2nd phase of volume, in April, 2010) in Kan Deng " the polystyrene foamed plastics recovery technical study " recovery polystyrene foamed plastics of the prior art has been made detailed elaboration, with toluene/methylene dichloride is mixed solvent dissolving EPS, pass through the recovery of precipitation/precipitator method prepared granules of polystyrene then, having disclosed the preferred process condition in the literary composition is: the volume of toluene mark is 80% in toluene/methylene dichloride mixed solvent, 40 ℃ of solvent temperatures, EPS particle volume 1.0cm3; Adopt in the precipitation method technology and add hydrodistillation and remove solvent; In the precipitator method technology, the consumption of precipitation agent is 1.5 times of volumes of quantity of solvent, and precipitation temperature is a room temperature, sedimentation time lh.Although the rate of recovery is higher in the aforesaid method, technical problems such as technology is loaded down with trivial details, complicated operation, cost recovery height, meeting generation secondary pollution.
Summary of the invention
Technology is loaded down with trivial details in order to solve in the prior art, complicated operation, cost recovery height, can produce the technical problem of secondary pollution, the invention provides a kind of waste old polystyrene foamed plastic and reclaim new process, can be implemented in and simplify technical process, simple to operate and greatly reduce the cost that waste old polystyrene foamed plastic reclaims on the basis that guarantees the rate of recovery; And secondary pollution.
Waste and old polyphenyl hexene porous plastics reclaims new process, may further comprise the steps:
A. waste and old polyphenyl hexene porous plastics is pulverized, formed particle;
B. add solvent, and the polyphenyl hexene foam grain that has added solvent is stirred, the two is fully contacted;
C. filter: the solution that stirs is filtered; Sending filter residue back to step a finishes in the particulate state polyphenyl hexene porous plastics of back formation;
D. the filtrate that produces among the step c is added precipitation agent, and solution is stirred, resolves;
E. filter: the resulting mixture in the steps d is filtered, and the particulate material after the filtration is the polyphenyl hexene foam grain after the recovery;
F. fractionation: carry out fractionation to filtering the resulting solution in back among the step e, the composition in mixed solvent and the precipitation agent can be separated, thereby realize recycling of mixed solvent, precipitation agent.
The present invention utilizes being used of mixed solvent and precipitation agent, just realized easily waste and old polyphenyl hexene porous plastics is reclaimed technical process, simple to operate, and the cost that greatly reduces the waste and old polyphenyl hexene porous plastics of recovery of mixed solvent that can be recycled and precipitation agent, can promote that the recovery of waste and old polyphenyl hexene porous plastics is had higher society and economic benefit.
Embodiment:
Waste and old polyphenyl hexene porous plastics reclaims new process, may further comprise the steps:
A. waste and old polyphenyl hexene porous plastics is pulverized, formed particle;
B. add mixed solvent, and the polyphenyl hexene foam grain that has added solvent is stirred, the two is fully contacted;
C. filter: the solution that stirs is filtered; Sending filter residue back to step a finishes in the particulate state polyphenyl hexene porous plastics of back formation;
D. the filtrate that produces among the step c is added precipitation agent, and solution is stirred, resolves;
E. filter: the resulting mixture in the steps d is filtered, and the particulate material after the filtration is the polyphenyl hexene foam grain after the recovery;
F. fractionation: carry out fractionation to filtering the resulting solution in back among the step e, the composition in mixed solvent and the precipitation agent can be separated, thereby realize recycling of mixed solvent, precipitation agent.
For making step f be easier to realize, the composition of described mixed solvent and being constructed as follows:
(toluene): V (ethylene dichloride)=(0.8 ~ 0.9): (0.1 ~ 0.2), the composition scope of toluene is between 0.8 ~ 0.9, and the formation of ethylene dichloride is chosen between 0.1 ~ 0.2, and the per-cent of toluene and the shared mixed solvent of ethylene dichloride adds up to 1; When mixed solvent used, the solvent temperature scope was between 40 ~ 62 ℃, and dissolution time is 20 minutes ~ 40 minutes.
Can learn through test card repeatedly, when mixed solvent is that the rate of recovery of the polyphenyl hexene porous plastics under following proportioning and the Working environment is the highest: (toluene): V (ethylene dichloride)=0.84:0.16, solvent temperature is 50 ℃, and dissolution time is 30min, and solubleness is about 0.60g/mL.Use above-mentioned mixed solvent, be aided with under the situation of suitable precipitation agent, the rate of recovery of p-poly-phenyl hexene porous plastics can be up to more than 94%.
Through repetition test, to select the concentration that accounts for the solvent volume 40% ~ 55% that produces among the step c for use be 85% ~ 98% ethanol to employed precipitation agent in the steps d.
Employed precipitation agent best results when to account for the solvent volume 50%, the concentration that produce among the step c be 95% ethanol in the steps d had both guaranteed the rate of recovery of polyphenyl hexene porous plastics can not cause the alcoholic acid waste again.
Protection scope of the present invention is not limited only to the disclosed technical scheme of specific embodiments part, and all (toluene): V (ethylene dichloride) that utilized all fall into protection scope of the present invention as the technical scheme that mixed solvent reclaims waste and old polyphenyl hexene porous plastics.
Claims (5)
1. waste and old polyphenyl hexene porous plastics reclaims new process, may further comprise the steps
A. waste and old polyphenyl hexene porous plastics is pulverized, formed particle;
B. add mixed solvent, and the polyphenyl hexene foam grain that has added solvent is stirred, the two is fully contacted;
C. filter: the solution that stirs is filtered; Sending filter residue back to step a finishes in the particulate state polyphenyl hexene porous plastics of back formation;
D. the filtrate that produces among the step c is added precipitation agent, and solution is stirred, resolves;
E. filter: the resulting mixture in the steps d is filtered, and the particulate material after the filtration is the polyphenyl hexene foam grain after the recovery;
F. fractionation: carry out fractionation to filtering the resulting solution in back among the step e, the composition in mixed solvent and the precipitation agent can be separated, thereby realize recycling of mixed solvent, precipitation agent.
2. waste and old polyphenyl hexene porous plastics according to claim 1 reclaims new process, it is characterized in that: the composition of employed mixed solvent and being constructed as follows among the step b: (toluene): V (ethylene dichloride)=(0.8 ~ 0.9): (0.1 ~ 0.2), the composition scope of toluene is between 0.8 ~ 0.9, the formation of ethylene dichloride is chosen between 0.1 ~ 0.2, and the per-cent of toluene and the shared mixed solvent of ethylene dichloride adds up to 1; When mixed solvent used, the solvent temperature scope was between 40 ~ 62 ℃, and dissolution time is 20 minutes ~ 40 minutes.
3. waste and old polyphenyl hexene porous plastics according to claim 2 reclaims new process, it is characterized in that: (toluene): V (ethylene dichloride)=0.84:0.16, and solvent temperature is 50 ℃, and dissolution time is 30min, and solubleness is 0.60g/mL.
4. waste and old polyphenyl hexene porous plastics according to claim 1 reclaims new process, it is characterized in that: to select for use and account for the solvent volume 40% ~ 55%, the concentration that produce among the step c be 85% ~ 98% ethanol to employed precipitation agent in the steps d.
5. waste and old polyphenyl hexene porous plastics according to claim 5 reclaims new process, it is characterized in that: precipitation agent is 95% ethanol with accounting for the solvent volume 50%, the concentration that produce among the step c.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101792766A CN103224646A (en) | 2013-05-15 | 2013-05-15 | Novel technological method for recovering waste polystyrene foam plastics |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013101792766A CN103224646A (en) | 2013-05-15 | 2013-05-15 | Novel technological method for recovering waste polystyrene foam plastics |
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| CN2013101792766A Pending CN103224646A (en) | 2013-05-15 | 2013-05-15 | Novel technological method for recovering waste polystyrene foam plastics |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015199561A1 (en) | 2014-06-25 | 2015-12-30 | Laboratorium Czystych Technologii Acren Sp. Z O.O. | Process for recycling waste thermal insulation materials |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1749297A (en) * | 2005-10-20 | 2006-03-22 | 中南大学 | Method for recovering waste polystyrene foam plastic |
| CN101307150A (en) * | 2008-07-10 | 2008-11-19 | 昆明理工大学 | Novel method for recovering waste and old polystyrol |
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2013
- 2013-05-15 CN CN2013101792766A patent/CN103224646A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1749297A (en) * | 2005-10-20 | 2006-03-22 | 中南大学 | Method for recovering waste polystyrene foam plastic |
| CN101307150A (en) * | 2008-07-10 | 2008-11-19 | 昆明理工大学 | Novel method for recovering waste and old polystyrol |
Non-Patent Citations (1)
| Title |
|---|
| 张治国等: "聚苯乙烯泡沫塑料回收工艺研究", 《浙江科技学院学报》, vol. 22, no. 2, 30 April 2010 (2010-04-30), pages 120 - 124 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015199561A1 (en) | 2014-06-25 | 2015-12-30 | Laboratorium Czystych Technologii Acren Sp. Z O.O. | Process for recycling waste thermal insulation materials |
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Application publication date: 20130731 |