CN105348554A - Method for preparing expandable polystyrene and graphite expandable polystyrene with waste polystyrene - Google Patents
Method for preparing expandable polystyrene and graphite expandable polystyrene with waste polystyrene Download PDFInfo
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- CN105348554A CN105348554A CN201510873408.4A CN201510873408A CN105348554A CN 105348554 A CN105348554 A CN 105348554A CN 201510873408 A CN201510873408 A CN 201510873408A CN 105348554 A CN105348554 A CN 105348554A
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- polystyrene
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- eps
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Abstract
The invention relates to a method for preparing expandable polystyrene and graphite expandable polystyrene with waste polystyrene. The method comprises the following steps: cutting waste polystyrene into small blocks; adding graphite into dichloromethane for ultrasonic dispersion, adding the polystyrene raw material into a dichloromethane solvent or dichloromethane suspension containing graphite, adding an obtained solution into an aqueous surfactant solution, stirring and carrying out temperature programming, separating and washing, so as to obtain expandable polystyrene or graphite expandable polystyrene particles. According to the method for preparing expandable polystyrene and graphite expandable polystyrene with waste polystyrene, provided by the invention, environmental pollution problems directly caused by waste polystyrene or caused during the recovery process of waste polystyrene are effectively solved, the deficiencies that the conventional waste foam is high in recovery cost, low in economic benefit and reduced in product's performance are overcome; besides, the dichloromethane solvent, which can serve as an aqueous surfactant solution of a regenerating medium, can be further recycled, the recovery process and device is simple, industrial production is facilitated, the recovery cost is low, nontoxicity and environmental protection are achieved.
Description
Technical field:
The present invention relates to a kind of by the recycling of waste and old polystyrol, especially waste and old polystyrol is prepared into the method for Expandable Polystyrene (EPS) and graphite Expandable Polystyrene (EPS).
Background technology:
Expandable Polystyrene (EPS) is widely used in the fields such as building, packaging, electronic apparatus, vehicles manufacture and decoration material.It is at present the second that the output of the Expandable Polystyrene (EPS) of raw material production has leapt to world's porous plastics with vinylbenzene, directly go out of use after most Expandable Polystyrene (EPS) goods use, because its quality is light, volume is large, corrosion-resistant and anti-aging, a large amount of discarded Expandable Polystyrene (EPS) is scattered in physical environment and becomes " white pollution " source, causes great destruction to ecotope.Therefore, how reclaiming and recycling discarded Expandable Polystyrene (EPS), is important topic urgently to be resolved hurrily at present.At present, the recycling of domestic and international p-poly-phenyl ethene mainly contains following several method: melting and granulation two-step approach, high-temperature cracking method, make light heat insulation building material and solvent method.Wherein, solvent process is simple, energy consumption is low, directly can obtain polystyrene resin, reclaims the polystyrene obtained and does not rupture owing to can keep former polystyrene molecular chain, very nearly the same with the polystyrene performance prepared with suspension polymerization.The preparation of graphite and polystyrene material is more and more subject to people and pays close attention to, and prepares in the method for graphite polystyrene material main based on situ aggregation method and solution blended process.CN1191868A discloses a kind of method of polystyrene foamed waste de foaming and recycling technique, but the method is the simple froth breaking of p-poly-phenyl vinyl foam, can not obtain high-quality polystyrene, and there is the shortcomings such as equipment complexity, operation inconvenience and power consumption height.CN204196039U discloses a kind of method of polystyrene foam plate recycle device, but exist in removal process due to heating make that polystyrene molecular chain easy fracture, energy consumption are large, in reclaimed materials impurity to deficiencies such as equipment damage are large.CN104327299A discloses a kind of method recycling polystyrene resin foam material, but tangerine oil used is difficult to obtain.CN101701073A discloses a kind of method of functionally remolding waste polystyrene, but the higher energy consumption that to cause in removal process of this method organic reagent used boiling point increases.To sum up, existing method is not poor product quality is exactly that economic benefit is low.
Summary of the invention:
The object of the invention is to for the deficiencies in the prior art, provide a kind of waste and old polystyrol to be prepared into the method for Expandable Polystyrene (EPS) and graphite Expandable Polystyrene (EPS).
The present invention is achieved by the following technical solutions:
Prepare the method for Expandable Polystyrene (EPS) and graphite Expandable Polystyrene (EPS) with waste and old polystyrol, comprise the following steps:
A, cleaning waste and old polystyrol and be cut into small pieces to facilitate enter container dissolve;
B, graphite is joined ultrasonic disperse in methylene dichloride, obtain the methylene dichloride suspension liquid containing graphite;
C, above-mentioned polystyrene raw material joined dichloromethane solvent or containing in the methylene dichloride suspension liquid of graphite, stirring at room temperature is homogeneous to solution, obtain the methylene dichloride of polystyrene or the dichloromethane solution containing graphite;
D, by the methylene dichloride of polystyrene or join in water phase surfactant mixture containing the dichloromethane solution of graphite, stir and temperature programming under certain speed, when temperature reaches 50 ~ 80 DEG C, granules of polystyrene generates;
Add whipping agent after e, separation and washing and obtain Expandable Polystyrene (EPS) or graphite expandable polystyrene particle.
Described graphite is natural graphite, hydrophobically modified graphite or expanded graphite.
In described polystyrene (or graphite polystyrene) solution, the massfraction of polystyrene is 5 ~ 25%.
Described content of graphite is 0 ~ 10% of polystyrene quality.
Described polystyrene (or graphite polystyrene) solution and surfactant soln volume ratio are 1:1 ~ 1:8.
Described tensio-active agent is Sodium dodecylbenzene sulfonate, and its concentration is 1.0 ~ 3.0 × 10
-2mol/L.
Described stirring velocity is 150 ~ 500r/min.
Described heating schedule is temperature rise rate is 0.3 ~ 1 DEG C/min, keeps 30 ~ 60min, then be that 0.1 ~ 0.5 DEG C/min is warming up to 55 DEG C with temperature rise rate after being warming up to 45 DEG C, keeps 10 ~ 30min.
The methylene dichloride and the water phase surfactant mixture that distill gained in preparation process all can recycles.
The present invention's methylene dichloride or the methylene dichloride dissolved polystyrene containing graphite, dichloromethane solvent is as the water phase surfactant mixture reusable edible of regenerating medium; Recovery process and device simply, are easy to suitability for industrialized production; Cost recovery is low, asepsis environment-protecting.
Accompanying drawing illustrates:
The Technology Roadmap of accompanying drawing 1 for utilizing waste and old polystyrol to prepare Expandable Polystyrene (EPS);
The Technology Roadmap of accompanying drawing 2 for utilizing waste and old polystyrol to prepare graphite Expandable Polystyrene (EPS).
Embodiment:
Below in conjunction with drawings and Examples, technical scheme of the present invention is described in further detail.
Prepare the method for Expandable Polystyrene (EPS) and graphite Expandable Polystyrene (EPS) with waste and old polystyrol, comprise the following steps:
A, cleaning waste and old polystyrol and be cut into small pieces to facilitate enter container dissolve;
B, graphite is joined ultrasonic disperse in methylene dichloride, obtain the methylene dichloride suspension liquid containing graphite;
C, above-mentioned polystyrene raw material joined dichloromethane solvent or containing in the methylene dichloride suspension liquid of graphite, stirring at room temperature is homogeneous to solution, obtain the methylene dichloride of polystyrene or the dichloromethane solution containing graphite;
D, by the methylene dichloride of polystyrene or join in water phase surfactant mixture containing the dichloromethane solution of graphite, stir and temperature programming under certain speed, when temperature reaches 50 ~ 80 DEG C, granules of polystyrene generates;
Add whipping agent after e, separation and washing and obtain Expandable Polystyrene (EPS) or graphite expandable polystyrene particle.
Described graphite is natural graphite, hydrophobically modified graphite or expanded graphite.
In described polystyrene (or graphite polystyrene) solution, the massfraction of polystyrene is 5 ~ 25%.
Described content of graphite is 0 ~ 10% of polystyrene quality.
Described polystyrene (or graphite polystyrene) solution and surfactant soln volume ratio are 1:1 ~ 1:8.
Described tensio-active agent is Sodium dodecylbenzene sulfonate, and its concentration is 1.0 ~ 3.0 × 10
-2mol/L.
Described stirring velocity is 150 ~ 500r/min.
Described heating schedule is temperature rise rate is 0.3 ~ 1 DEG C/min, keeps 30 ~ 60min, then be that 0.1 ~ 0.5 DEG C/min is warming up to 55 DEG C with temperature rise rate after being warming up to 45 DEG C, keeps 10 ~ 30min.
The methylene dichloride and the water phase surfactant mixture that distill gained in preparation process all can recycles.
Embodiment 1:
Cleaning waste polystyrene foam is also cut into small pieces, above-mentioned 120g polystyrene raw material is joined in 400mL dichloromethane solvent, stirring at room temperature 10min, it is in the aqueous solution of 1.80 × 10-2mol/L Sodium dodecylbenzene sulfonate that above-mentioned gained solution is joined 2000mL concentration, controlling stirring velocity is 300r/min stirring heating, temperature rise rate 0.5 DEG C/min, when being warming up to 45 DEG C, keep 55min, controlling temperature rise rate is again 0.25 DEG C/min, be warming up to 55 DEG C, keep 25min, filter, washing, obtain white polystyrene particle, particle diameter is 0.5 ~ 1.5mm, retain dichloromethane solvent and the water phase surfactant mixture of distillation gained, recycle in order to next.
Embodiment 2:
Clean waste polystyrene foam and stripping and slicing process, 15g natural graphite is joined in 1000mL methylene dichloride, ultrasonic 5min, then 300g polystyrene raw material is joined in the dichloromethane solvent containing natural graphite, ultrasonic dissolution 5min, it is in the aqueous solution of 1.50 × 10-2mol/L Sodium dodecylbenzene sulfonate that above-mentioned gained solution is joined 2000mL concentration, controlling stirring velocity is 400r/min stirring heating, temperature rise rate 0.45 DEG C/min, when being warming up to 45 DEG C, keep 50min, controlling temperature rise rate is again 0.1 DEG C/min, be warming up to 55 DEG C, keep 25min, filter, washing, obtain black polystyrene particle, particle diameter is 0.5 ~ 1.5mm, retain dichloromethane solvent and the water phase surfactant mixture of distillation gained, recycle in order to next.
Embodiment 3:
Clean waste polystyrene foam and stripping and slicing process, 12g hydrophobically modified graphite is joined in 1000mL methylene dichloride, ultrasonic 5min, then 300g polystyrene raw material is joined in the dichloromethane solvent containing hydrophobically modified graphite, ultrasonic dissolution 5min, it is in the aqueous solution of 1.44 × 10-2mol/L Sodium dodecylbenzene sulfonate that above-mentioned gained solution is joined 2000mL concentration, controlling stirring velocity is 350r/min stirring heating, temperature rise rate 0.40 DEG C/min, when being warming up to 45 DEG C, keep 57min, controlling temperature rise rate is again 0.20 DEG C/min, be warming up to 55 DEG C, keep 30min, filter, washing, obtaining black polystyrene grain diameter is 0.5 ~ 1.5mm, retain dichloromethane solvent and the water phase surfactant mixture of distillation gained, recycle in order to next.
Embodiment 4:
Clean waste polystyrene foam and stripping and slicing process, 3g expanded graphite is joined in 1000mL methylene dichloride, ultrasonic 7min, then 300g polystyrene raw material is joined in the dichloromethane solvent containing hydrophobically modified graphite, ultrasonic dissolution 6min, it is in the aqueous solution of 2.52 × 10-2mol/L Sodium dodecylbenzene sulfonate that above-mentioned gained solution is joined 2000mL concentration, controlling stirring velocity is 450r/min stirring heating, temperature rise rate 0.35 DEG C/min, when being warming up to 45 DEG C, keep 60min, controlling temperature rise rate is again 0.10 DEG C/min, be warming up to 55 DEG C, keep 30min, filter, washing, obtain black polystyrene particle, particle diameter is 0.5 ~ 1.5mm, retain dichloromethane solvent and the water phase surfactant mixture of distillation gained, recycle in order to next.
Embodiment 5:
By gained polystyrene in example 1, add whipping agent according to a conventional method, obtain expandable polystyrene particle.Obtain the pre-granules of polystyrene sent out after expandable polystyrene particle being passed at ambient pressure the water vapour of 90 DEG C or warm air, it is 40 times of polystyrene that the water vapour passing into 120 DEG C after placing 24h under room temperature sealing condition under normal pressure obtains expansion ratio.By gained graphite polystyrene in example 2 ~ 4, in the same way, the graphite polystyrene that expansion ratio is 35 times is obtained.
Claims (9)
1. prepare a method for Expandable Polystyrene (EPS) and graphite Expandable Polystyrene (EPS) with waste and old polystyrol, it is characterized in that, comprise the following steps:
A, cleaning waste and old polystyrol and be cut into small pieces to facilitate enter container dissolve;
B, graphite is joined ultrasonic disperse in methylene dichloride, obtain the methylene dichloride suspension liquid containing graphite;
C, above-mentioned polystyrene raw material joined dichloromethane solvent or containing in the methylene dichloride suspension liquid of graphite, stirring at room temperature is homogeneous to solution, obtain the methylene dichloride of polystyrene or the dichloromethane solution containing graphite;
D, by the methylene dichloride of polystyrene or join in water phase surfactant mixture containing the dichloromethane solution of graphite, stir and temperature programming under certain speed, when temperature reaches 50 ~ 80 DEG C, granules of polystyrene generates;
Add whipping agent after e, separation and washing and obtain Expandable Polystyrene (EPS) or graphite expandable polystyrene particle.
2. prepare the method for Expandable Polystyrene (EPS) and graphite Expandable Polystyrene (EPS) according to waste and old polystyrol according to claim 1, it is characterized in that: described graphite is natural graphite, hydrophobically modified graphite or expanded graphite.
3. prepare the method for Expandable Polystyrene (EPS) and graphite Expandable Polystyrene (EPS) according to waste and old polystyrol according to claim 1, it is characterized in that: in described polystyrene or graphite polystyrene solution, the massfraction of polystyrene is 5 ~ 25%.
4. prepare the method for Expandable Polystyrene (EPS) and graphite Expandable Polystyrene (EPS) according to waste and old polystyrol according to claim 1, it is characterized in that: described quantity of graphite is 0 ~ 10% of polystyrene quality.
5. prepare the method for Expandable Polystyrene (EPS) and graphite Expandable Polystyrene (EPS) according to waste and old polystyrol according to claim 1, it is characterized in that: described is 1:1 ~ 1:8 containing polystyrene or the dichloromethane solution of graphite polystyrene and the volume ratio of water phase surfactant mixture.
6. prepare the method for Expandable Polystyrene (EPS) and graphite Expandable Polystyrene (EPS) according to waste and old polystyrol according to claim 1, it is characterized in that: described tensio-active agent is Sodium dodecylbenzene sulfonate, its concentration is 1.0 ~ 3.0 × 10
-2mol/L.
7. prepare the method for Expandable Polystyrene (EPS) and graphite Expandable Polystyrene (EPS) according to waste and old polystyrol according to claim 1, it is characterized in that: described stirring velocity is 150 ~ 500r/min.
8. the method for Expandable Polystyrene (EPS) and graphite Expandable Polystyrene (EPS) is prepared according to waste and old polystyrol according to claim 1, it is characterized in that: described heating schedule is: after being first warming up to 45 DEG C with temperature rise rate 0.3 ~ 1 DEG C/min, keep 30 ~ 60min, then be warming up to 55 DEG C of maintenance 10 ~ 30min with temperature rise rate 0.1 ~ 0.5 DEG C/min.
9. prepare the method for Expandable Polystyrene (EPS) and graphite Expandable Polystyrene (EPS) according to waste and old polystyrol according to claim 1, it is characterized in that: methylene dichloride and and the separating obtained equal recycle of surfactant soln of in preparation process, distilling gained.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108251069A (en) * | 2018-02-12 | 2018-07-06 | 吉林大学 | A kind of method that microcapsules of storing energy through phase change shell material is prepared with graphite waste and old polystyrol |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005073303A1 (en) * | 2003-12-31 | 2005-08-11 | Eska | Expanded polystyrene solubilisation method |
| CN101701073A (en) * | 2009-11-05 | 2010-05-05 | 吉林大学 | Method for functionally remolding waste polystyrene |
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- 2015-12-03 CN CN201510873408.4A patent/CN105348554A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005073303A1 (en) * | 2003-12-31 | 2005-08-11 | Eska | Expanded polystyrene solubilisation method |
| CN101701073A (en) * | 2009-11-05 | 2010-05-05 | 吉林大学 | Method for functionally remolding waste polystyrene |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108251069A (en) * | 2018-02-12 | 2018-07-06 | 吉林大学 | A kind of method that microcapsules of storing energy through phase change shell material is prepared with graphite waste and old polystyrol |
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Application publication date: 20160224 |