CN101165084A - Plastic-aluminum separating agent and plastic-aluminum separating method - Google Patents
Plastic-aluminum separating agent and plastic-aluminum separating method Download PDFInfo
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- CN101165084A CN101165084A CNA200710132936XA CN200710132936A CN101165084A CN 101165084 A CN101165084 A CN 101165084A CN A200710132936X A CNA200710132936X A CN A200710132936XA CN 200710132936 A CN200710132936 A CN 200710132936A CN 101165084 A CN101165084 A CN 101165084A
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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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Abstract
The present invention relates to aluminum-plastic separating agent and aluminum-plastic separating process, and belongs to the field of composite aluminum-plastic material recovering technology. The aluminum-plastic separating agent consists of formic acid and dichloromethane as the main components as non-ionic surfactant. The aluminum-plastic separating process with the aluminum-plastic separating agent includes the steps of crushing and washing composite aluminum-plastic material, compounding aluminum-plastic separating agent liquid, soaking, taking out, centrifugally separating, washing and drying. The present invention has high aluminum-plastic separating efficiency, less environmental pollution and low cost, and is suitable for industrial recovery of waste composite aluminum-plastic material.
Description
Technical field
The present invention relates to a kind of separating agent, especially a kind of being used for carried out isolating separating agent to the aluminium and the plastics of waste aluminium plastic compound packaging material, the invention still further relates to simultaneously and use this separating agent that aluminium plastic compound packaging material is carried out isolating method, belong to composite aluminium plastic material separation technical field.
Background technology
Aluminium plastic compound packaging material is used for the packing of the various article of daily life in a large number with its good resistance light heat preservation property.But a large amount of aluminium plastic compound packaging materials of discarding and can't degrading with the back produces have not only lost a large amount of aluminium and plastics resource, and environment have been polluted.According to national departments concerned statistics, this type of depleted aluminium plastic compound packaging material every year is up to 3,000,000 tons.
Be Sweden Tetrapack company in maximum aluminium plastic compound packaging material (soft packaging) supplier of China at present, so the overwhelming majority is the aluminium plastic compound packaging material that Tetrapack company produces in the depleted aluminium plastic compound packaging material.According to applicant's repetition test and with the exchanging of the relevant technologies personnel of the said firm, the lamination layer structure of aluminium plastic compound packaging material that can basic confirmation the said firm mainly is: press from both sides one deck aluminium foil layer in the two-layer LDPE (Low-density polyethylene plastics) thin film layer; The material of aluminium foil layer is the simple substance fine aluminium, and its surface is formed with thin aluminium sesquioxide (Al
2O
3) layer; Sealed polyethylene plastic is bonding with the aluminium sesquioxide layer after by the hot pressing fusion.In addition, another kind of possible situation is, between aluminium foil and the plastic film layers by powerful organic binder bond layer is bonding but not hot pressing is bonding.No matter which kind of of above-mentioned two kinds of structures, combining between aluminium foil layer and the plastic film layers is all very firm.Just because of this, the separation of plastic-aluminum is very difficult, is difficult to for a long time a large amount of depleted aluminium plastic compound packaging materials are recycled.
Existing method to aluminium in the aluminium plastic compound packaging material and plastics recycling mainly contains: 1) with the depleted aluminium plastic compound packaging material with the mechanical disintegration and the melting of heating after, be used to make article such as flowerpot or blow-off pipe, obviously this method is low to the recovery utilization rate of aluminium and plastics; 2) the depleted aluminium plastic compound packaging material is burned, the burning-off plastics stay aluminium, and this method can only reclaim aluminium, and of a high price; 3) utilize the thermal plasma stove, all vaporizing up to 15000 degree plastic-aluminum to the high temperature of 50000 degree, al composition sinking founding becomes aluminium ingot, and plastics vaporizations is risen after being condensed into jelly as industrial chemicals, but this method investment is huge; 4) the depleted aluminium plastic compound packaging material is put in the solution that contains separate substance soaked, utilize separate substance to penetrate behind the plastic film layers, thereby aluminium foil is separated with plastics film the dissolving of aluminium sesquioxide layer.This kind method cost is minimum, the rate of recovery is the highest, is the important development direction that waste aluminium plastic compound packaging material is recycled therefore.
Understand the above-mentioned the 4th according to the applicant) plant that normally used separate substance is acid or alkali in the existing recovery method, the main nitric acid that adopts of acid, alkali mainly adopts caustic soda (NaOH
2); Wherein especially to adopt acid to do the in the majority of separate substance.Though nitric acid or caustic soda aggressiveness are good, pollution to environment own reaches the seriously corroded to equipment, can't industrialization use; And aluminium foil dissolving is too many or all dissolved when carrying out, and produces more aluminum salt solution and can not fully reclaim pure aluminum.In addition, because the price of nitric acid and caustic soda is higher, it is obviously too high therefore to use nitric acid or caustic soda that aluminium plastic compound packaging material is carried out the isolating cost of industrialization plastic-aluminum, and can cause new pollution to environment; Especially nitric acid not only to environmental pollutions such as equipment, and stimulates very greatly to human body, thereby can't really implement effectively aborning at present in fact at all.Soak the technology of separating plastic-aluminum as for existing some organic solvent (as chlorine virtue or acetone etc.) that uses, the applicant finds through practice, owing to only be to use simple organic solvent, so to aluminium and separating of moulding almost not having actual effect.
Summary of the invention
The objective of the invention is: the solution that contains separating agent at above-mentioned existing utilization soaks the problem of separating aluminium foil and the existence of plastics film technology to aluminium plastic compound packaging material, a kind of plastic-aluminum separating agent is proposed, utilizing this separating agent to mix the solution that forms with water soaks waste aluminium plastic compound packaging material, aluminium in the aluminium plastic compound packaging material not only can be separated efficiently with plastics, and the corrodibility of environment and contaminative and use cost all reduced greatly, thereby be suitable for suitability for industrialized production that waste aluminium plastic compound packaging material is reclaimed; Provide a kind of this plastic-aluminum separating agent of concrete utilization simultaneously waste aluminium plastic compound packaging material is carried out the isolating method of plastic-aluminum.
The present invention is directed to the technical scheme that above-mentioned purpose takes is: a kind of plastic-aluminum separating agent, and this separating agent mainly is mixed and made into by formic acid and methylene dichloride, and wherein the weight ratio umber of formic acid is: 40-200 part, the weight ratio umber of methylene dichloride is: 5-10 part.
The key step of utilizing this separating agent to carry out plastic-aluminum separating method is:
1, pulverize cleaning---aluminium plastic compound packaging material is pulverized, cleaned;
2, dosing---above-mentioned plastic-aluminum separating agent is mixed with water, be made into concentration greater than 8% parting liquid, temperature maintenance is at 10-40 ℃;
3, soaking---the aluminium plastic compound packaging material that will pulverize after cleaning drops into parting liquid immersion, soak time 4-12 hour;
4, going out groove---the aluminium plastic compound packaging material fragment after will soaking is pulled out and is drained;
5, centrifugation---the aluminium plastic compound packaging material fragment after will draining is put into separating centrifuge, carries out centrifugation;
6, cleaning-drying---isolated aluminium foil and plastics film are cleaned with scavenging solution respectively, carry out drying again.
The applicant is after experiment obtains final highly effective separating effect repeatedly, and the characteristics of further analyzing separating agent of the present invention theoretically are as follows:
1) at first, the methylene dichloride in the separating agent of the present invention can carry out swelling to plastics film earlier, after the intermolecular pitch enlargement of plastics film, makes methylene dichloride and formic acid all can effectively penetrate plastics film.
2) according to the similar theory that mixes, the methylene dichloride that penetrates plastics film can dissolve by the plastic interface layer that plastics film and aluminium sesquioxide laminar surface is bonding slightly, can more thoroughly effectively pure aluminum be separated fully with plastics film like this; In like manner, for the situation that has organic binder layer between aluminium foil layer and the plastic film layers, the methylene dichloride that penetrates plastics film also can fully dissolve this organic binder bond layer.
3) the water-soluble one-tenth of formic acid is acid, and its reaction formula is: HCOOH+H
2O=HCOO
-+ H
3O
+The formic acid that penetrates plastics film then can dissolve the aluminium sesquioxide layer, and the reaction formula of dissolution process is: Al
2O
3+ 6HCOOH=2Al (HCOO)
3+ 3H
2O; Since the acidity of formic acid relatively a little less than, therefore compare inorganic acid or highly basic, formic acid almost no longer continues the simple substance aluminum layer below the dissolving aluminium sesquioxide layer behind effective dissolving aluminium sesquioxide layer.
Analyze existing single inorganic acid, mineral alkali or the single organic solvent used again and carry out the plastic-aluminum separation case, can draw: use single inorganic acid or mineral alkali, not after penetrating plastics film interfacial layer (plastic interface layer, organic binder bond layer or aluminium sesquioxide layer) effectively to be dissolved, but directly dissolve plastic layer or aluminium lamination; And the use single organic solvent though can effectively penetrate plastics film, only can be dissolved plastic interface layer or organic binder bond layer and can not effectively dissolve the aluminium sesquioxide layer.
As the above analysis, existing single inorganic acid, mineral alkali or the single organic solvent used of contrast, separating agent of the present invention then can effectively penetrate plastics film, can dissolve aluminium sesquioxide layer and plastic interface layer or organic binder bond layer respectively again, therefore obviously more excellent to the separating effect of aluminium foil and plastics film; The existing various separating agents of this over-all properties that separating agent of the present invention had do not possess.
In addition, formic acid in the separating agent of the present invention is compared existing various separate substances with methylene dichloride, because of self relative neutral chemical property less to the corrodibility and the contaminative of environment, and low price, therefore very be suitable for realizing veritably aluminium plastic compound packaging material is carried out the isolating suitability for industrialized production of plastic-aluminum.
In sum, separating agent of the present invention can be described as the advantageous feature separately that very combines two kinds of components dexterously, not only break through the fixed pattern thinking of in the past using strong acid or highly basic to corrode plastic-aluminum combined layer simply, and broken through existing mode of with an organic solvent dissolving the plastic-aluminum composite bed merely; Both solved the problem that existing separating agent only dissolves aluminium lamination or plastic layer merely thus, only corrode the comprehensive action of inorganic world surface layer or bios surface layer when having realized effective infiltration plastics film again, thereby reach the effect of really thoroughly separating aluminium foil and plastics efficiently (actual effect can referring to the table 1-table 3 among the embodiment).Particularly valuable is, the main component of described separating agent all is the inexpensive chemical of using always, and environmental pollution is little, is fit to that fully waste aluminium plastic compound packaging material is carried out industrial separation and reclaims and produce.
What deserves to be mentioned is that above-mentioned theoretical analysis but just can not obtain apparently before experiment; Just the opposite, in order to find separating agent of the present invention, the applicant carries out the problem of existence in the plastic-aluminum separation to aluminium plastic compound packaging material at the existing solution soaking of above-mentioned background technology introduction, carried out reaching the experimentation repeatedly in 3 years, comprised and attempt making separating agent and various separating process with various chemical.Though the contained composition of final separating agent all is chemical commonly used separately, finds these two kinds of compositions are combined and realize that the process of low cost, low pollution, high efficiency separation plastic-aluminum is extremely difficult.As everyone knows, chemistry is an experimental science.Still lacking under enough theoretical direction situations at present, the applicant is by a large amount of experiments and trial-production, compare screening repeatedly, finally just find described separating agent, such experiment trial-manufacturing process is very difficult, and this suffices to show that also separating agent of the present invention is not obviously just getable.
For above-mentioned plastic-aluminum separating method step, wherein concentration in the 2nd step and temperature parameter and the soak time parameter in the 3rd step are that the applicant obtains through testing repeatedly and manufacture experimently in a large number, can these parameters be the important parameters when specifically using separating agent of the present invention to carry out plastic-aluminum separating method, also be concerning the critical data that realize final effect of the present invention.In fact these parameters are to be mutually related, such as: when concentration was high, soak time can be lacked, and temperature can be hanged down, but dropped into the cost height of described separating agent; When concentration was low, soak time need be grown, and temperature needs height, but it is low to drop into the cost of described separating agent; And when concentration was lower than certain limit, no matter how other parameter changed, and did not almost have separating effect, and same temperature does not have separating effect yet when surpassing certain limit; Concentration certainly is 100% in addition, promptly be separating agent and water not all, but obviously cost price is too high.Therefore more than minimum concentration and in the certain temperature range, the comprehensive arrangement of real cost of production and efficient is depended in concrete concentration and the setting within the specific limits of soak time parameter.
In sum, plastic-aluminum separating agent of the present invention has outstanding substantive distinguishing features and obvious improvement compared to existing technology; Plastic-aluminum separating method for adopting plastic-aluminum separating agent of the present invention should have outstanding substantive distinguishing features and obvious improvement equally.
The further improvement of plastic-aluminum separating agent of the present invention is, described separating agent also contains nonionogenic tenside, and its weight ratio umber is 1-4 part.
Embodiment
The invention will be further described below in conjunction with embodiment.
Embodiment one
The plastic-aluminum separating agent of present embodiment mainly is mixed and made into by formic acid and methylene dichloride, and wherein the weight ratio umber of formic acid is: 90 parts, the weight ratio umber of methylene dichloride is: 7 parts.
The step of specifically utilizing the separating agent of present embodiment to carry out plastic-aluminum separating method is:
1, pulverize cleaning---the waste aluminium plastic compound packaging material of collecting is ground into bulk with pulverizer, cleans again;
2, dosing---above-mentioned plastic-aluminum separating agent is dropped into tank, and making the concentration of this separating agent in tank is 12%, and makes the interior solution temperature of tank maintain 35 ℃;
3, soak---will be broken into blocky aluminium plastic compound packaging material and put into the container that is shaped on mesh, and with hoisting machine container be dropped in the tank, and container will be immersed in below the water level fully soak, soak time is 11 hours;
4, going out groove---the container after will soaking hangs out tank, the interior chunky shape aluminium plastic compound packaging material small part of container this moment is separated into aluminium foil and plastics film fully, thereby form the chunky shape mixture, the mixture in the container is pulled out mixture and drain in container again behind preliminary draining;
5, centrifugation---the mixture that drains is sent into whizzer, start whizzer, the whole aluminium foils in the mixture all separate fully with plastics film at this moment, and isolated aluminium foil is spherical;
6, cleaning-drying---isolated aluminium foil and plastics film are cleaned with rinse water respectively separately, carry out drying after the cleaning again;
7, charging---dried aluminium foil and plastics film are concentrated back dress bag more respectively after letter sorting.
In addition, 1) the block area of the waste aluminium plastic compound packaging material of pulverizing in the above-mentioned steps 1 is generally 20-150cm
22) drying in the above-mentioned steps 6 can be to dry, dry or dry, and drying plant adopts baking oven or drying tunnel, and its type of heating is the hot air circulation heating, and its heating raw can adopt electricity, steam, fuel oil, combustion gas or fire coal; 3) can carry out deep processing again after the above-mentioned steps 7, send into as the aluminium foil that will adorn the bag collection and smelt into aluminium ingot in the smelting furnace, plastics film then is processed into plastic pellet with tablets press; Perhaps aluminium foil is processed into aluminium powder; 4) container in the above-mentioned steps 3 can be made of metal or non-metallic material; Or the like.
The applicant selects a kind of result of implementation to add up as following table behind the plastic-aluminum separating agent and plastic-aluminum separating method that use present embodiment:
Table 1
| Drop into separate dose | The water yield | Drop into aluminium plastic compound packaging material amount (siccative) | Complete isolated pure aluminum amount (99% purity) | Complete isolated amount of plastic (100% purity) | Separation rate | Corrosion and pollution situation to environment and equipment |
| 420kg | 3500kg | 500kg | 95kg | 385kg | 96% | Pollute minimumly, the people is endangered little. |
Embodiment two
The plastic-aluminum separating agent of present embodiment mainly is mixed and made into by formic acid and methylene dichloride, also be added with nonionogenic tenside, wherein the weight ratio umber of formic acid is: 160 parts, the weight ratio umber of methylene dichloride is 9 parts, and the weight ratio umber of nonionogenic tenside is: 2 parts.
Specifically utilize the separating agent of present embodiment to carry out plastic-aluminum separating method and embodiment one is basic identical, different is:
1) in the step 1, waste aluminium plastic compound packaging material is ground into strip;
2) in the step 2, the concentration of separating agent in tank is 20%, and makes the interior solution temperature of tank maintain 28 ℃;
3) in the step 3, soak time is 8 hours;
4) in the step 6, isolated aluminium foil and plastics film are cleaned with liming respectively separately, carry out drying then;
The applicant selects a kind of result of implementation to add up as following table behind the plastic-aluminum separating agent and plastic-aluminum separating method that use present embodiment:
Table 2
| Drop into separate dose | The water yield | Drop into aluminium plastic compound packaging material amount (siccative) | Complete isolated pure aluminum amount (99% purity) | Complete isolated amount of plastic (100% purity) | Separation rate | Corrosion and pollution situation to environment and equipment |
| 700kg | 3500kg | 500kg | 100kg | 390kg | 98% | Pollute minimumly, the people is endangered little. |
The component of present embodiment plastic-aluminum separating agent is compared embodiment one, increased a small amount of nonionogenic tenside, and in the present embodiment plastic-aluminum separating method, separating agent concentration is compared embodiment one and is wanted high, therefore impel final plastic-aluminum separation rate further to improve, reduce the production time simultaneously.
In addition, the present embodiment plastic-aluminum separating method cleans with liming in step 6, and the formic acid that can neutralize and wash down makes the waste water after the cleaning be neutral, the discharge of wastewater after helping cleaning.
Embodiment three
The component of present embodiment plastic-aluminum separating agent is identical with embodiment two, but the weight ratio umber difference of each component, wherein the weight ratio umber of formic acid is: 42 parts, the weight ratio umber of methylene dichloride is: 6 parts, the weight ratio umber of nonionogenic tenside is: 3 parts.
Specifically utilize the separating agent of present embodiment to carry out plastic-aluminum separating method and embodiment two is basic identical, different is:
1) in the step 2, the mass concentration of separating agent in tank is 25%, and makes the interior solution temperature of tank maintain 20 ℃;
2) in the step 3, soak time is 6 hours;
3) inboard wall of cistern is equipped with ultrasonic generator, opens ultrasonic generator when soaking in step 3.
The applicant selects a kind of result of implementation to add up as following table behind the plastic-aluminum separating agent and plastic-aluminum separating method that use present embodiment:
Table 3
| Drop into separate dose | The water yield | Drop into aluminium plastic compound packaging material amount (siccative) | Complete isolated pure aluminum amount (99% purity) | Complete isolated amount of plastic (100% purity) | Separation rate | Corrosion and pollution situation to environment and equipment |
| 875kg | 3500kg | 500kg | 100kg | 395kg | 99% | Pollute minimumly, the people is endangered little. |
In the present embodiment plastic-aluminum separating method, separating agent concentration ratio embodiment two has raising again, and has ultrasonic wave to act on aluminium plastic compound packaging material in the immersion when soaking again.Therefore impel final plastic-aluminum separation rate further to improve, further reduce the production time simultaneously.
The applicant once used nitric acid, caustic soda or single organic solvent (chlorine virtue, acetone) to carry out the plastic-aluminum separating experiment to carrying out aluminium plastic compound packaging material, and each selects a kind of experimental result to add up as following table:
Table 4
| The separating agent kind | Separating agent mixes back weight and concentration (weight percent) with water | Drop into aluminium plastic compound packaging material weight (siccative) | The separating experiment time | Complete isolated pure aluminum weight (99% purity) | Complete isolated plastics weight (100% purity) | Separation rate | Corrosion and pollution situation to environment and equipment |
| Nitric acid | 1kg (100%) | 100g | 1 minute | 15g | 79g | 94% | Extremely serious, reaction has a large amount of pungency tobacco a moment, makes us suffocating. |
| 1kg (50%) | 100g | 5 minutes | 15g | 79g | 94% | Seriously, pungency makes utmost point people feel bad. | |
| 1kg (25%) | 100g | 25 minutes | 16g | 80g | 96% | More serious, pungency is painful. | |
| 1kg (15%) | 100g | Greater than 96 hours | 0g | 0g | 0% | More serious, intense stimulus is arranged. |
Table 5
| The separating agent kind | Separating agent mixes back weight and concentration (weight percent) with water | Drop into aluminium plastic compound packaging material weight (siccative) | The separating experiment time | Complete isolated pure aluminum weight (99% purity) | Complete isolated plastics weight (100% purity) | Separation rate | Corrosion and pollution situation to environment and equipment |
| Caustic soda | 1kg (80%) | 100g | 10 minutes | 0g (aluminium is dissolved entirely) | 78g | 78% (only being plastics) | Seriously |
| 1kg (50%) | 100g | 20 minutes | (most of aluminium is dissolved, and the attached work of small amount of aluminum is on plastic film for 11g.) | 60g | 61.1% | More serious | |
| 1kg (25%) | 100g | 2 hours | (a spot of aluminium is dissolved, and most of aluminium still is attached on the plastic film for 26g.) | 45g | 47.6% | Generally |
Table 6
| The separating agent kind | Drop into separate dose | Mix the water yield | Drop into aluminium plastic compound packaging material amount (siccative) | Complete isolated pure aluminum amount (99% purity) | Complete isolated amount of plastic (100% purity) | Separation rate | Corrosion and pollution situation to environment and equipment |
| The chlorine virtue | 1kg | 0 | 200g | Do not separate | Do not separate | 0 | Volatile, human body there are strong anesthesia and stimulation, corrosive equipment |
| 1kg | 500 | 200 | Do not separate | Do not separate | 0 | ||
| 1kg | 1kg | 200g | Do not separate | Do not separate | 0 | ||
| Annotate | The separating experiment time was greater than 48 hours | ||||||
Table 7
| The separating agent kind | Drop into separate dose | Mix the water yield | Drop into aluminium plastic compound packaging material amount (siccative) | Pure aluminum amount after the separation (99% purity) | Amount of plastic after the separation (100% purity) | Separation rate | Corrosion and pollution situation to environment and equipment |
| Acetone | 1kg | 0 | 200g | Do not separate | Do not separate | 0％ | Volatile, inflammable height is quick-fried, and is big to environmental hazard |
| 1kg | 500g | 200g | Do not separate | Do not separate | 0％ | ||
| 1kg | 1kg | 200g | Do not separate | Do not separate | 0％ | ||
| Annotate | The separating experiment time was greater than 48 hours | ||||||
Table 1, table 2 and table 3 in table 4, table 5, table 6 and table 7 and the foregoing description are compared, be not difficult to find out, the comprehensive separating effect that is reached behind the plastic-aluminum separating agent of the employing embodiment of the invention and the plastic-aluminum separating method is much higher.Especially chlorine virtue and acetone almost can not get complete isolating pure aluminum and plastics (promptly not having real separating effect); And caustic soda only can be isolated plastics; Though as for the absolute separation rate height of nitric acid, but during actual experiment, only used the input amounts of 200 grams just to allow the people stand, can infer the situation when big input amount thus, so can't use nitric acid to carry out actual production, and nitric acid is conspicuous to the corrodibility of equipment at all.In addition, caustic soda, chlorine virtue and acetone all have certain hazardness and corrodibility to people and equipment; As the chlorine virtue people's nervus centralis there is strong anesthetic action, metal is had intensive corrodibility; Acetone belongs to highly flammable Class A fire hazard material for another example, and serious fire hazard is arranged; And for example easy scorching hot human body of caustic soda and perishable organism.To sum up, can reach a conclusion: the production that existing separating agents such as use mineral acid, mineral alkali or organic solvent thing all are difficult to drop into real pragmatize.
In a word, the applicant proves by experiment and test repeatedly, adopt plastic-aluminum separating agent of the present invention and plastic-aluminum separating method, really can efficiently the aluminium foil in the waste aluminium plastic compound packaging material be separated completely with plastics film, and the cost of plastic-aluminum separating agent is low, and environmental pollution is very little again, thereby really is suitable for suitability for industrialized production that the recycling of waste aluminium plastic compound packaging material is carried out.
At present, the applicant has entered the actual small serial production stage, and the production result reaches the result described in the foregoing description fully.
The foregoing description that the present invention is not limited to illustrate as an example, as the composition of the various plastic-aluminum separating agents among the above-mentioned embodiment, the variation that content also has other, and the step of various plastic-aluminum separating methods, parameter also can mutual alternative in the foregoing description.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection domain of requirement of the present invention.
Claims (10)
1. plastic-aluminum separating agent, it is characterized in that: this separating agent mainly is mixed and made into by following weight ratio umber by formic acid and methylene dichloride, formic acid 40-200 part, methylene dichloride 5-10 part.
2. according to the described plastic-aluminum separating agent of claim 1, it is characterized in that: also contain nonionogenic tenside, its weight ratio umber is 1-4 part.
3. according to the described plastic-aluminum separating agent of claim 1, it is characterized in that: the weight ratio umber of described formic acid is 90 parts, and the weight ratio umber of described methylene dichloride is 7 parts.
4. according to the described plastic-aluminum separating agent of claim 2, it is characterized in that: the weight ratio umber of described formic acid is 160 parts, and the weight ratio umber of described methylene dichloride is 9 parts, and the weight ratio umber of described nonionogenic tenside is 2 parts.
5. according to the described plastic-aluminum separating agent of claim 2, it is characterized in that: the weight ratio umber of described formic acid is 42 parts, and the weight ratio umber of methylene dichloride is 6 parts, and the weight ratio umber of nonionogenic tenside is 3 parts.
6. plastic-aluminum separating method that uses arbitrary described plastic-aluminum separating agent of claim 1-4 is characterized in that may further comprise the steps:
1) pulverize cleaning---aluminium plastic compound packaging material is pulverized, cleaned;
2) dosing---above-mentioned plastic-aluminum separating agent is mixed with water, be made into concentration greater than 8% parting liquid, temperature maintenance is at 10-40 ℃;
3) soaking---the aluminium plastic compound packaging material that will pulverize after cleaning drops into parting liquid immersion, soak time 4-12 hour;
4) going out groove---the aluminium plastic compound packaging material fragment after will soaking is pulled out and is drained;
5) centrifugation---the aluminium plastic compound packaging material fragment after will draining is put into separating centrifuge, carries out centrifugation;
6) cleaning-drying---isolated aluminium foil and plastics film are cleaned with rinse water respectively, carry out drying again.
7. according to the described plastic-aluminum separating method of claim 6, it is characterized in that: in the described step 1), waste aluminium plastic compound packaging material is ground into bulk; Described step 2) in, the concentration of separating agent in tank is 20%, and makes the interior solution temperature of tank maintain 28 ℃; In the described step 3), soak time is 8 hours; Rinse water in the described step 6) is a liming.
8. according to the described plastic-aluminum separating method of claim 6, it is characterized in that: in the described step 1), waste aluminium plastic compound packaging material is ground into strip; Described step 2) in, the mass concentration of separating agent in tank is 25%, and makes the interior solution temperature of tank maintain 20 ℃; Described inboard wall of cistern is equipped with ultrasonic generator; In the described step 3), soak time is 6 hours, opens ultrasonic generator when soaking; Rinse water in the described step 6) is a liming.
9. according to the described plastic-aluminum separating method of claim 7, it is characterized in that: the block area of the waste aluminium plastic compound packaging material of pulverizing in the described step 1) is generally 20-150cm
2
10. according to the described plastic-aluminum separating method of claim 6, it is characterized in that: the drying in the described step 6) can be to dry, dry or dry; After the described step 6) in steps 7) charging---dried aluminium foil and plastics film are concentrated back dress bag respectively.
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| CN101912868A (en) * | 2010-07-30 | 2010-12-15 | 张侃 | Separation and recovery technology for waste aluminum-plastic composite packaging material |
| CN101503524B (en) * | 2009-03-09 | 2011-02-16 | 浙江大学 | Method for fast stripping plastic-aluminum composite material by supercritical CO2 fluid |
| CN101475702B (en) * | 2009-01-16 | 2011-04-13 | 浙江大学 | Method for fast stripping plastic-aluminum composite material by force chemistry |
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| CN107901281A (en) * | 2017-12-18 | 2018-04-13 | 太仓颢睦环保设备有限公司 | Automatic constant-temperature separation equipment |
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| CN109433799A (en) * | 2018-11-14 | 2019-03-08 | 蓝思科技（长沙）有限公司 | It is a kind of for separation of glasses-assembled metal part release agent and separating technology |
| CN112845507A (en) * | 2020-12-26 | 2021-05-28 | 安徽省腾越铝塑有限公司 | Environment-friendly low-energy-consumption high-efficiency separation method for waste aluminum-plastic products |
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