CN101475702B - Method for fast stripping plastic-aluminum composite material by force chemistry - Google Patents
Method for fast stripping plastic-aluminum composite material by force chemistry Download PDFInfo
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- CN101475702B CN101475702B CN2009100957074A CN200910095707A CN101475702B CN 101475702 B CN101475702 B CN 101475702B CN 2009100957074 A CN2009100957074 A CN 2009100957074A CN 200910095707 A CN200910095707 A CN 200910095707A CN 101475702 B CN101475702 B CN 101475702B
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/141—Feedstock
- Y02P20/143—Feedstock the feedstock being recycled material, e.g. plastics
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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 invention discloses a method for quick peeling off aluminum plastic composite materials by a mechanochemical method. The method comprises: crushing the aluminum plastic composite material into pieces and placing the pieces in a separating agent; completely separating aluminum from plastic through quick heating, heat preservation and quick cooling; then, respectively obtaining aluminum and plastic through filtration, floatation separation and drying; and the separating agent comprises the following components in percentage by weight: 10 to 99.9 percent of organic carboxylic acid, 0.1 to 1 percent of surfactant and the balance being water. The method does not need special equipment and has simple operation and low cost; therefore, the method is propitious to industrial production and can realize respective reclaiming of aluminum and plastic, thereby not only improving the recycling value of the aluminum plastic composite material, but also reducing environmental pollution caused by wastes.
Description
Technical field
The present invention relates to the method for fast stripping plastic-aluminum composite material, be specifically related to utilize the synergy of chemical process and temperature internal stress to come the reactive force between aluminium and plastics in the rapid damage aluminium plastic composite material, realize peeling off automatically of aluminium and plastics, belong to the environmental protection field.
Background technology
Aluminium plastic composite material is aluminium foil and plastics by hot pressing or the matrix material with multilayered structure that is bonded.This matrix material had both utilized aluminium foil quality softness, and ductility is good, was convenient to processing, good barrier property, and characteristics such as light and beautiful have also utilized plastics easily to process, acid-alkali-corrosive-resisting, the characteristics that intensity is good.Aluminium plastic composite material has resistance light, constant temperature, non-toxic and safe and characteristics with low cost, especially is fit to make composite soft packaging and packing lining, is widely used in the packing of commodity such as food, medicine, chemical and daily necessities.Aluminium plastic composite material mainly comprises: aluminium-plastic composite paper, plastic-aluminum combined jar of material, plastic-aluminum combined mantle, plastic-aluminum combined hose packing material and plastic-aluminum combined Blister Package material etc., such as Lile packaging series, dentifrice tube packing etc., all be typical aluminium plastic composite material.
Can understand the service condition of aluminium plastic composite material from the consumption data of aluminium foil.According to European foil industry association statistics, the aluminium foil of Europe 70% or more is applied to all kinds of packing articles,, consumes at Japanese Packaging Aluminum Foil and to account for 70% up to 75% at this ratio of the U.S..And China has become the 3rd packing big country that is only second to the U.S. and Japan, and along with the fast development of China's packaging industry, aluminium foil has also been realized increasing rapidly in the application of packaging field.China's Packaging Aluminum Foil consumption is about 110,000 tons/year at present, wherein the cigarette package aluminium foil is about 3.8 ten thousand tons, about 20,000 tons of used for packing foods aluminium foil, about 9000 tons of milk preparation Packaging Aluminum Foil, about 5000 tons of daily use chemicals product Packaging Aluminum Foil, about 10,000 tons of other Packaging Aluminum Foil.China's aluminium foil compares very big gap in addition in the application rate of packing business with developed country, there is the toothpaste more than 90% to adopt plastic-aluminum combined hose packing as developed country such as American-European-Japanese, and present China's ratio less than 5% also of adopting this packing, therefore, the aluminium foil consumption of China also has very big potentiality, this also provides chance for aluminium foil packing in the fast development of Chinese market, be the fastest market of global evolution at present, according to statistics, to Eleventh Five-Year Plan latter stage, China's Packaging Aluminum Foil annual requirement will reach about 250,000 tons, will be 1.3 times of present Packaging Aluminum Foil consumption.In all aluminium plastic composite materials, aluminium foil only accounts for 20% of aluminium plastic composite material weight, calculates like this, is about 550,000 tons at present, to the Eleventh Five-Year Plan end of term, will reach 1,250,000 tons.As seen, aluminium plastic composite material is widely used, usage quantity is very big.
The fast development of aluminium plastic composite material has also brought huge environmental issue, promptly can produce the huge waste of quantity, if deal with improperly, can bring huge pressure to environment protection.Because aluminium foil and plastics is incompatible, the depleted aluminium plastic composite material mixes and is worth without any recycling, must separate aluminium foil and plastics and obtain aluminium foil and plastics, so just has higher recovery value, especially aluminium foil, its price height, the source of goods are few, if can effective recycling, must bring considerable economic, also eliminate the matrix material waste simultaneously because can not recycle the pollution of environment.Therefore, the recycling of aluminium plastic composite material has crucial economic benefit and social benefit, and this also becomes the focus of research.
In the world, existing research institution has carried out the recycling of aluminium plastic composite material, has developed relevant technology and treatment process.(Proc.SPE 3 for Muther C., Separation of laminates usingResult technology for Muther
RdAnn.Recycling Conf., Chicago, IL, 1996:37) designed a kind of treatment process, at in exsiccant technology, matrix material being laminated with mechanical process, laminate product simply ground to obtain usual mix product, the very difficult aluminium of isolating single component from matrix material approaches the problem with plastics, propose to obtain the distribution that stabilized single phase is formed with the high speed rotating laminate product, its principle be aluminium plastic composite material quicken and custom-designed machine in during eddy generation the behavior difference and separated, according to this principle, Austrian ResultTechnology AG company has designed corresponding commercial treatment system.For this system, need the high speed accelerator to produce very strong eddy current and very high acceleration, very high to equipment requirements, separation costs is also high, but for the matrix material that tack coat is arranged, separation degree is not high.The Brazilian Alcoa Aluminio S A of branch office and the Tetra pak company of Aluminum Company of America (Alcoa), Klabin company and TSLEngenharia Ambiental company cooperate (Alcoa, Tetra Pak, Klabin and TSLEngenharia Ambiental, Chemical Engineering Progress, 2005,101 (7): 13), developed a cover plastic-aluminum recovery system, utilize electric energy to produce one plasma jet at 15000 ℃, make the mixture heating up of aluminium and plastics, plastics are recycled into lower-molecular substance by the degree of depth and are converted into paraffin, and aluminium then reclaims with the form of high-purity aluminium ingot, and this Technology Need produces high-temperature plasma, to the equipment requirements height, investment running cost is very high, simultaneously plastics is changed into paraffin, is actually and has reduced recovery value.
Than external research, domestic research is more, has a large amount of patents and technical literature to exist, and this may utilize in a large number with China, and to reclaim plastics relevant, also with to exist huge waste and old material to disassemble enterprise relevant with the personnel of related industries production and research of being engaged in.Summary is got up, and is domesticly mainly containing two kinds of methods aspect the aluminium plastic composite material separating: i.e. physical method and chemical process.
Physical method comprises two kinds of methods, the one, the physics electrostatic methods, aluminium plastic composite material is pulverized, pass through abrasive dust mechanical mill again, separate at following aluminium of the effect of frictional force and plastics, to grind again after good material through electrostatic separator repeatedly sorting separate plastics and aluminium, this method generally can only be separated al-plastics composite pipe, shortcoming is that requirement is pulverized matrix material very carefully, expends a large amount of electric energy, and uneconomical, secondly separating effect is not good yet, the prerequisite of separating plastics and aluminium by the method for electric field is that aluminium and plastics can not be sticked together, and for aluminium plastic composite material, this method lost efficacy; The 2nd, the method that adopts organic solvent to soak, be to mention respectively in the Chinese patent application of CN1066413A and CN1718408A with an organic solvent separating aluminum plastic film as publication number, centrifugation then, this separation method is owing to use the organic solvent of high density, and plastic layer is very big to the adsorptive capacity of solvent, even if pass through centrigugal swing dryer, still have 30% adsorptive capacity nearly, therefore separation costs is too high, and has only neat solvent, segregation rate is very slow, nor be that any organic solvent is all effective, also must be suitable solvent, and seek appropriate organic solvent also and be not easy, in order to raise the efficiency, publication number be the CN1559704A Chinese patent application in an organic solvent, can add certain tensio-active agent, do not use which kind of tensio-active agent but indicate in the patent, this method is used the organic solvent of a large amount of high densitys, can bring environmental pollution problems.
Chemical process is by certain chemical solvents, realizes separating of aluminium and plastics on the basis of infiltration and reaction, and this is the method for studying at most.Here mainly contain: the one, be described in the CN1337280A Chinese patent application as publication number, utilize metallic aluminium and aluminum oxide all to be dissolvable in water the principle of acid or alkali, the method that use acid is molten or alkali is molten is the al dissolution in the material, thereby recovery plastics, and then aluminum bearing waste made polymerize aluminum chloride or Tai-Ace S 150, this method can not obtain aluminium foil, reduce the value that reclaims, and seldom use this method to carry out the separation of aluminium plastic composite material; The 2nd, utilize acidic substance to infiltrate through plastic layer; make the interface (aluminum oxide) between plastics and aluminium dissolve earlier; add certain oxygenant again; protection aluminium; thereby can obtain the aluminium foil and the plastics of a part; select the strongly-acid material in the method for use; as publication number is to select nitric acid for use in the CN1401443A Chinese patent application; at publication number is to have selected sulfuric acid or phosphoric acid etc. in the CN101054446A Chinese patent application for use; the plastic-aluminum Separation Research (Gu Guohua, Zhang Bo, the mining metallurgical engineering that contain the aluminium plastic waste at document; 27 (5): 47-50; 2007) selected hydrochloric acid in for use, selected for use in the method for strong acid, because acidity is too strong at these; aluminium foil can fall with acid-respons and make the rate of recovery of aluminium become very low, also can reduce the economy of recovery.At publication number is to propose to select for use acid lower slightly acetic acid aqueous solution to be used as separating agent in the CN1903965A Chinese patent application, this method velocity of separation under the lower concentration acetic acid aqueous solution is very slow, separation efficiency is low, and the acetic acid aqueous solution of selecting high density for use is the separation costs height then.
Take a broad view of aforementioned existing separation method, exist to be separated into the shortcoming that power is low, separation costs is high, the aluminium foil rate of recovery is low and velocity of separation is slow.In addition, most separation method has all been ignored a problem, be bounding force between aluminium foil and plastic layer destroyed after, in fact do not peel away, but be superimposed together, owing to there is separating agent, therefore still have certain reactive force in the middle of them, aluminium foil still is in the same place with plastics when putting into water and carrying out flotation separation, does not in fact finish peeling off between aluminium foil and plastics.Therefore, separate, still need to study the separation method of novel efficient fast and low-cost, aluminium foil and plastic layer can not be superimposed together, realize peeling off automatically for plastic-aluminum.
Summary of the invention
The invention provides a kind of method of utilizing the force chemistry fast stripping plastic-aluminum composite material, after the immersion of aluminium plastic composite material process separating agent, utilize variation of temperature to make that the generation internal stress is used as peeling force between aluminium and plastics again, peel off to reach the fast automatic of aluminium and plastics.This method is easy to operate, has realized the recovery respectively of aluminium and plastics, and rate of recovery height.
A kind of method of utilizing the mechanochemical method fast stripping plastic-aluminum composite material, comprise: aluminium plastic composite material is ground into fragment, place separating agent, through being rapidly heated, insulation makes aluminium separate fully with plastics with the fast cooling process, more after filtration, flotation separation, drying obtain aluminium and plastics respectively.
Described separating agent is made up of following components in weight percentage: organic carboxyl acid 10%～99.9%, and tensio-active agent 0.1%～1%, surplus is a water.
Wherein organic carboxyl acid is the compound with general structure RCOOH, and R is C in the formula
1～C
10Alkyl, C
3～C
10Cycloalkyl or C
6～C
10Aromatic base, preferred C
1～C
10Straight chained alkyl, more preferably C
1～C
4Straight chained alkyl, as formic acid, acetate etc., wherein best with acetate (being acetic acid) effect.
Because conventional organic solvent, as halohydrocarbon, alkane, aromatic hydrocarbons etc., though porous passes through plastic layer, therefore but it can only produce the effect of physics swelling to plastic layer, but without any effect, can only rely on organic solvent that the physics swelling of plastics is used for destroying interaction force between plastics and aluminium foil to aluminium foil, this destructive efficient is lower, isolating success ratio is low, and speed is slow, can not be as effective separating agent component.Therefore, should consider that both porous again can be to the separating agent component of aluminium foil generation effect by plastic layer.
The analysis found that aluminium is a kind of active metal, be subjected to the corrosion of acid easily, so acid mass-energy is to its generation effect, the surface of aluminium foil is the aluminum oxide of one deck thin layer, also is subjected to the corrosion of acid easily.But when selecting acidic substance,, then consume a large amount of aluminium easily, the rate of recovery of aluminium is reduced, also can consume a large amount of acidic substance simultaneously, reduce the service efficiency of separating agent if acidity is strong excessively.Therefore the present invention selects to have suitable tart organic carboxyl acid, also need to consider the infiltration of this material in plastic layer simultaneously, the size of seepage velocity is relevant with molecular size, it is the size of R group, the R group is big more, and seepage velocity is slow more, therefore takes into account seepage velocity and acid size, in order to reach good separating effect, generally select C for use
1～C
10Alkyl carboxylic acid, C
3～C
10Cycloalkyl carboxylic acid or C
6～C
10Aromatic base carboxylic acid etc., preferred C
1～C
10The straight-chain alkyl carboxylic acid, more preferably C
1～C
4The straight-chain alkyl carboxylic acid.These materials all can permeate well and pass through plastic layer, plastic layer is produced the swelling effect, can provide certain acidity again simultaneously, the aluminum oxide on corrosion aluminium surface, under the acting in conjunction of physics swelling and chemical corrosion, the bounding force between rapid damage aluminium foil and plastics.
Described tensio-active agent is selected one or more in anion surfactant, the nonionogenic tenside for use, wherein anion surfactant can be selected soap commonly used, sulfonate, sulfuric acid or phosphate ester salt etc. for use, from reducing surface tension and improve the seepage velocity of organic carboxyl acid plastic layer, preferred lauryl alcohol sulfuric acid; Nonionogenic tenside can be selected Soxylat A 25-7 commonly used, polyvalent alcohol or alkylol amide etc. for use, from reducing surface tension and improving the seepage velocity of organic carboxyl acid plastic layer, preferred alkyl phenol polyethenoxy ether.
Tensio-active agent can reduce organic carboxyl acid in process of osmosis and the surface action power that produces between plastics, improves the infiltration rate of organic carboxyl acid in plastic layer, and conventional anion surfactant or nonionogenic tenside all can reach this kind effect.
The effect of water is organic carboxyl acid and a surfactant concentrations in the dilution separating agent, keeps certain acidity and surfactant concentration in the separating agent.
In order to reach good separating effect, preferred 2: 1～6: 1 of the weight ratio of separating agent and aluminium plastic composite material.
Describedly be rapidly heated, insulation and fast cooling process be: with 1～100 ℃/min (preferred 5～20 ℃/min) speed is warming up to 80～90 ℃, insulation 10～40min, (preferred 5～20 ℃/min) speed is cooled to normal temperature with 1～100 ℃/min again.
Because use separating agent of the present invention, though can destroy the bounding force of aluminium foil and plastics, realize separating of aluminium foil and plastics, aluminium foil and plastics can not be peeled off automatically.Use separating agent velocity of separation of the present invention still slower at normal temperatures, in order to improve separation efficiency, then need to accelerate the seepage velocity of separating agent in plastics, heating up helps accelerating seepage velocity, corresponding raising separation efficiency.Therefore, consider the boiling point of each component in the separating agent, the temperature limit after the inventive method will be rapidly heated fixes on 80～90 ℃, accelerates the seepage velocity of separating agent in plastic layer, improves separation efficiency.
In order further to improve velocity of separation, the present invention has also utilized plastics and aluminium to vary with temperature the difference of rate of expansion except the physics swelling and chemical corrosion effect that utilize separating agent, reaches peeling off automatically of plastics and aluminium.The coefficient of expansion as polyethylene (PE) plastics is: 170 * 10
-6/ ℃, and the coefficient of expansion of aluminium is: 24 * 10
-6/ ℃, differing nearly 10 times, the difference of the coefficient of expansion can cause aluminium plastic composite material to have different inflationary spirals when elevated temperature, when strong bounding force being arranged between the two, aluminium and plastics can not free expansions, and the deformation that is produced is identical, can produce the temperature internal stress between aluminium and plastics like this.If under the effect of separating agent, the bounding force between aluminium and plastics is weakened or is destroyed, when this bounding force less than because during temperature internal stress that different inflationary spiral produces, aluminium and plastics will be peeled away automatically.Equally, aluminium and plastics can shrink when cooling, because the difference of the coefficient of expansion can cause the inner temperature internal stress that produces, between aluminium and plastics separated dose weaken or the destructive bounding force less than because the temperature internal stress that different inflationary spirals produces is peeled away aluminium and plastics automatically.Therefore can in sepn process, utilize the fast lifting of temperature, make that the difference owing to the coefficient of expansion produces internal stress between aluminium and plastics, quicken peeling off automatically between aluminium and plastics.Can be rapidly heated through one or many, insulation and fast cooling process, reach peeling off automatically of aluminium and plastics.Through experiment, generally through once be rapidly heated, insulation and fast cooling process can realize aluminium and plastics in the aluminium plastic composite material peels off automatically.
Simultaneously, the present invention finds that after deliberation the aluminium plastic composite material fragment is under suitable size, plastics through being rapidly heated, insulation and temperature-fall period, can take place to curl, and aluminium foil can not curl, and will realize peeling off automatically of aluminium foil and plastics this moment, do not had bounding force between aluminium and plastics even if can avoid like this, but be superimposed together owing to the existence that separating agent is arranged still has certain reactive force, make follow-up plastic-aluminum flotation to carry out.In order to realize peeling off automatically of aluminium foil and plastics better, it can be the fragment of the pulverizer sieve aperture of 1～80mm by diameter that the aluminium plastic composite material fragment can be selected for use, can be the fragment of the pulverizer sieve aperture of 5～50mm by diameter preferably, can be the fragment of the pulverizer sieve aperture of 10～30mm by diameter more preferably.
In described filtration, flotation separation, the drying process, filter gained filtrate for consuming the remaining separating agent in back, reusable; Flotation separation is to utilize the difference of aluminium and plastic density to come flotation separation aluminium and plastics.
The present invention has following advantage:
The inventive method does not need special equipment, and is simple to operate, and required cost is low, is beneficial to suitability for industrialized production.This method can realize that aluminium foil and the fast automatic of plastics are peeled off in the aluminium plastic composite material, thereby realizes the recovery respectively of aluminium foil and plastics, and the recycling that has not only improved aluminium plastic composite material is worth, and has reduced the pollution of waste to environment.
Embodiment
Embodiment 1
In the strap clamp cover glass still of 1000ml, it is in 20% the acetic acid aqueous solution that 2.5g lauryl alcohol sodium sulfovinate is dissolved in the 500ml weight percent concentration, adding 100g can be the aluminium plastic composite material fragment of the pulverizer sieve aperture of 10～15mm by diameter, speed with 10 ℃/min is warming up to 80 ℃, insulation 20min, withdraw thermal medium then, logical water coolant, cool off material fast to normal temperature with the speed of cooling of 10 ℃/min, aluminium is reached fully with plastics to be separated, obtain the mixture of aluminium chips and plastic flakes after filtration, place pond flotation separation aluminium and plastics (on plastics bubble through the water column, and aluminium is sunken at the bottom of the pond) again, dry aluminium and plastics, weighing obtains 19.8g aluminium, the 79.9g plastics.
Embodiment 2
In the strap clamp cover glass still of 1000ml, it is in 15% the acetic acid aqueous solution that 2.5g lauryl alcohol sodium sulfovinate is dissolved in the 500ml weight percent concentration, adding 100g can be the aluminium plastic composite material fragment of the pulverizer sieve aperture of 10～15mm by diameter, speed with 10 ℃/min is warming up to 85 ℃, keep 30min, withdraw thermal medium then, logical water coolant, cool off material fast to normal temperature with the speed of cooling of 10 ℃/min, aluminium is reached fully with plastics to be separated, obtain the mixture of aluminium chips and plastic flakes after filtration, place pond flotation separation aluminium and plastics (on plastics bubble through the water column, and aluminium is sunken at the bottom of the pond) again, dry aluminium and plastics, weighing obtains 19.9g aluminium, the 79.9g plastics.
Embodiment 3
In the strap clamp cover glass still of 1000ml, it is in 50% the acetic acid aqueous solution that 2.5g lauryl alcohol sodium sulfovinate is dissolved in the 500ml weight percent concentration, adding 100g can be the aluminium plastic composite material fragment of the pulverizer sieve aperture of 10～15mm by diameter, speed with 10 ℃/min is warming up to 90 ℃, keep 10min, withdraw thermal medium then, logical water coolant, cool off material fast to normal temperature with the speed of cooling of 10 ℃/min, aluminium is reached fully with plastics to be separated, obtain the mixture of aluminium chips and plastic flakes after filtration, place pond flotation separation aluminium and plastics (on plastics bubble through the water column, and aluminium is sunken at the bottom of the pond) again, dry aluminium and plastics, weighing obtains 19.5g aluminium, the 79.9g plastics.
Embodiment 4
In the strap clamp cover glass still of 1000ml, it is in 20% the acetic acid aqueous solution that 0.5g lauryl alcohol sodium sulfovinate is dissolved in the 500ml weight percent concentration, adding 100g can be the aluminium plastic composite material fragment of the pulverizer sieve aperture of 10～15mm by diameter, speed with 20 ℃/min is warming up to 80 ℃, keep 40min, withdraw thermal medium then, logical water coolant, cool off material fast to normal temperature with the speed of cooling of 10 ℃/min, aluminium is reached fully with plastics to be separated, obtain the mixture of aluminium chips and plastic flakes after filtration, place pond flotation separation aluminium and plastics (on plastics bubble through the water column, and aluminium is sunken at the bottom of the pond) again, dry aluminium and plastics, weighing obtains 19.7g aluminium, the 79.9g plastics.
Embodiment 5
In the strap clamp cover glass still of 1000ml, it is in 20% the acetic acid aqueous solution that 2.5g dodecyl phenol polyethenoxy ether is dissolved in the 500ml weight percent concentration, adding 100g can be the aluminium plastic composite material fragment of the pulverizer sieve aperture of 10～15mm by diameter, speed with 5 ℃/min is warming up to 80 ℃, keep 20min, withdraw thermal medium then, logical water coolant, cool off material fast to normal temperature with the speed of cooling of 10 ℃/min, aluminium is reached fully with plastics to be separated, obtain the mixture of aluminium chips and plastic flakes after filtration, place pond flotation separation aluminium and plastics (on plastics bubble through the water column, and aluminium is sunken at the bottom of the pond) again, dry aluminium and plastics, weighing obtains 19.8g aluminium, the 79.9g plastics.
Embodiment 6
In the strap clamp cover glass still of 1000ml, it is in 20% the acetic acid aqueous solution that 2.5g lauryl alcohol sodium sulfovinate is dissolved in the 500ml weight percent concentration, adding 100g can be the aluminium plastic composite material fragment of the pulverizer sieve aperture of 10～15mm by diameter, speed with 10 ℃/min is warming up to 80 ℃, keep 30min, withdraw thermal medium then, logical water coolant, cool off material fast to normal temperature with the speed of cooling of 5 ℃/min, aluminium is reached fully with plastics to be separated, obtain the mixture of aluminium chips and plastic flakes after filtration, place pond flotation separation aluminium and plastics (on plastics bubble through the water column, and aluminium is sunken at the bottom of the pond) again, dry aluminium and plastics, weighing obtains 19.7g aluminium, the 79.9g plastics.
Comparative Examples 1
In the strap clamp cover glass still of 1000ml, it is in 20% the acetic acid aqueous solution that 2.5g lauryl alcohol sodium sulfovinate is dissolved in the 500ml weight percent concentration, adding 100g can be the aluminium plastic composite material fragment of the pulverizer sieve aperture of 10～15mm by diameter, constant temperature is at normal temperature, after 48 hours, bounding force between aluminium and plastics is destroyed fully, but aluminium and plastics are not peeled away automatically.
Comparative Examples 2
In the strap clamp cover glass still of 1000ml, it is in 20% the acetic acid aqueous solution that 2.5g lauryl alcohol sodium sulfovinate is dissolved in the 500ml weight percent concentration, adding 100g can be the aluminium plastic composite material fragment of the pulverizer sieve aperture of 10～15mm by diameter, constant temperature is at 80 ℃, through behind the 70min, bounding force between aluminium and plastics is destroyed fully, but aluminium and plastics are not peeled away automatically.
Comparative Examples 3
In the strap clamp cover glass still of 1000ml, it is in 5% the acetic acid aqueous solution that 2.5g lauryl alcohol sodium sulfovinate is dissolved in the 500ml weight percent concentration, adding 100g can be the aluminium plastic composite material fragment of the pulverizer sieve aperture of 10～15mm by diameter, speed with 10 ℃/min is warming up to 80 ℃, keep 20min, logical then water coolant cools off material to normal temperature fast with the speed of cooling of 10 ℃/min, and the bounding force between aluminium and plastics can not be destroyed.
Comparative Examples 4
In the strap clamp cover glass still of 1000ml, adding 500ml weight percent concentration is 20% acetic acid aqueous solution, adding 100g again can be the aluminium plastic composite material fragment of the pulverizer sieve aperture of 10～15mm by diameter, speed with 10 ℃/min is warming up to 80 ℃, keep 20min, logical then water coolant cools off material to normal temperature fast with the speed of cooling of 10 ℃/min, and the bounding force between aluminium and plastics can not be destroyed.
Comparative Examples 5
Except adding 100g can be the aluminium plastic composite material fragment of pulverizer sieve aperture of 100mm by diameter, all the other operations are all with embodiment 1, resulting aluminium and plastics still are superimposed together, plastic layer curling not obvious, so that aluminium and plastics are not peeled away automatically.
Claims (7)
1. method of utilizing the force chemistry fast stripping plastic-aluminum composite material, comprise: aluminium plastic composite material is ground into fragment, place separating agent, through being rapidly heated, insulation makes aluminium separate fully with plastics with the fast cooling process, more after filtration, flotation separation, drying obtain aluminium and plastics respectively;
Describedly be rapidly heated, insulation and fast cooling process be: the speed with 1～100 ℃/min is warming up to 80～90 ℃, insulation 10～40min, the speed with 1～100 ℃/min is cooled to normal temperature again;
Described separating agent is made up of following components in weight percentage: organic carboxyl acid 10%～99.9%, and tensio-active agent 0.1%～1%, surplus is a water;
Described organic carboxyl acid is compound or the formic acid with general structure RCOOH, and R is C in the formula
1～C
10Alkyl, C
3～C
10Cycloalkyl or C
6～C
10Aromatic base;
Described fragment is can be the fragment of the pulverizer sieve aperture of 1～80mm by diameter.
2. the method for claim 1, it is characterized in that: described compound with general structure RCOOH is an acetate.
3. the method for claim 1, it is characterized in that: described tensio-active agent is one or more in anion surfactant, the nonionogenic tenside.
4. method as claimed in claim 3 is characterized in that: described anion surfactant is soap, sulfonate, sulfuric acid or phosphate ester salt.
5. method as claimed in claim 3 is characterized in that: described nonionogenic tenside is Soxylat A 25-7, polyvalent alcohol or alkylol amide.
6. the method for claim 1, it is characterized in that: the weight ratio of described separating agent and aluminium plastic composite material is 2: 1～6: 1.
7. the method for claim 1 is characterized in that: describedly be rapidly heated, insulation and fast cooling process be: the speed with 5～20 ℃/min is warming up to 80～90 ℃, insulation 10～40min, and the speed with 5～20 ℃/min is cooled to normal temperature again.
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| CN101797574B (en) * | 2010-01-29 | 2012-05-23 | 湛江师范学院 | Method for separating and recycling aluminum and plastics |
| CN101912868A (en) * | 2010-07-30 | 2010-12-15 | 张侃 | Separation and recovery technology for waste aluminum-plastic composite packaging material |
| CN113477671A (en) * | 2021-07-09 | 2021-10-08 | 陕西青朗万城环保科技有限公司 | Method for treating waste circuit board based on microwave |
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| US20040129372A1 (en) * | 2002-09-12 | 2004-07-08 | Chao-Kuo Huang | Separating method for recycling foil-laminated material |
| CN1903965A (en) * | 2006-08-07 | 2007-01-31 | 韩兆飞 | Debonding agent of aluminium plastic composite film |
| CN101054446A (en) * | 2007-04-30 | 2007-10-17 | 河北科技大学 | Aluminum-plastic composite packing separating agent and method of separating and reclaiming the same |
| CN101165084A (en) * | 2007-09-20 | 2008-04-23 | 曹光军 | Plastic-aluminum separating agent and plastic-aluminum separating method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040129372A1 (en) * | 2002-09-12 | 2004-07-08 | Chao-Kuo Huang | Separating method for recycling foil-laminated material |
| CN1903965A (en) * | 2006-08-07 | 2007-01-31 | 韩兆飞 | Debonding agent of aluminium plastic composite film |
| CN101054446A (en) * | 2007-04-30 | 2007-10-17 | 河北科技大学 | Aluminum-plastic composite packing separating agent and method of separating and reclaiming the same |
| CN101165084A (en) * | 2007-09-20 | 2008-04-23 | 曹光军 | Plastic-aluminum separating agent and plastic-aluminum separating method |
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