CN100526373C - Aluminum-plastic composite packing separating agent and method of separating and reclaiming the same - Google Patents
Aluminum-plastic composite packing separating agent and method of separating and reclaiming the same Download PDFInfo
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- CN100526373C CN100526373C CNB2007100618343A CN200710061834A CN100526373C CN 100526373 C CN100526373 C CN 100526373C CN B2007100618343 A CNB2007100618343 A CN B2007100618343A CN 200710061834 A CN200710061834 A CN 200710061834A CN 100526373 C CN100526373 C CN 100526373C
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- plastic composite
- aluminium
- composite packaging
- separating agent
- oxygenant
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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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- Processing Of Solid Wastes (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
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Abstract
The invention discloses a release agent of aluminum composite packing and the recovery method thereof. Said aluminum composite packing release agent is composed of sulfuric acid or phosphoric acid with a concentration of 5-20% and oxidizer. It applies as following steps: soaking the aluminum composite packing material in the sulfuric acid or phosphoric acid with a concentration of 5-20% at 40-80 DEG C, 0.1-0.5% cationic surfactant or only in the release agent containing sulfuric acid or phosphoric acid with a concentration of 5-20%, stirring uniformly; feeding oxidizer, stirring; aluminium layer and plastic layer being automatically peeled off after soaking for 1-20 minutes; washing the packing material with water twice or three times, removing the surface residual release agent; releasing the aluminum foil and plastic layer. The invention can separate the aluminum composite packing quickly and has a high aluminum coefficient of recovery, meanwhile provides a good working environment to the operator.
Description
Technical field
The present invention relates to a kind of with isolating separating agent of aluminium plastic composite packaging material and separation and recovery method thereof.
Background technology
At present, aluminium plastic composite packaging material is used very extensive in the packing of food, medicine, chemical and daily necessities.But because the bonding strength of aluminium plastic composite packaging material is splendid, when recycling, be difficult to aluminium lamination is separated fully with plastic layer, recovery utilization rate is very low, causes white pollution.Therefore, how aluminium layer is separated fully with plastic layer, become the constantly problem of research of people.
In the existing separating agent, with an organic solvent (as acetone, ether, tetracol phenixin, carbon trichloride, benzene and the chlorobenzene etc.) that have soak wrapping material and separate.But organic solvent has toxicity, and is bigger to the harm of operative employee's human and environment; Secondly, the volatility of organic solvent is bigger, and consumption is big, and the organic solvent price is higher in addition, so the cost recovery height, practicality is relatively poor.
The somebody adopts nitric acid (being equipped with other compositions) to be the stripper of aluminium plastic composite packaging material, because nitric acid is volatile acid, niff is arranged, and generates the very strong nitrogen oxide of contaminative in reaction process.So neither a good method.
Be exactly that to adopt formic acid or acetate (being equipped with other compositions) be stripper in addition, because it is formic acid or acetate have the strong impulse smell, bigger to the infringement of human respiratory; Moreover formic acid or acetate are organic monoacid, acidity a little less than, so long reaction time, energy consumption is big, inferior separating effect.And the price of formic acid or acetate is also higher, and separation costs is big.
Summary of the invention
But the technical problem to be solved in the present invention provides a kind of sharp separation aluminium plastic composite packaging, and aluminium foil rate of recovery height, and can be separating agent and the separation and recovery method thereof that the operator provides the aluminium plastic composite packaging of works fine environment.
The technical solution used in the present invention is:
The separating agent of aluminium plastic composite packaging of the present invention is that 5～20% sulfuric acid and oxygenant or concentration are that 5～20% phosphoric acid and oxygenant are formed by concentration, and the ratio of weight and number of described sulphuric acid soln or phosphoric acid solution and oxygenant is 100: 0.2～1; Wherein said oxygenant is hypochlorite, permanganate or persulphate; When oxygenant is hypochlorite, also include cats product in the separating agent, the ratio of weight and number between sulfuric acid or phosphoric acid solution, hypochlorite and cats product is 100: 0.2～1: 0.1～0.5; Described cats product is sodium lauryl sulphate or sodium laurylsulfonate.
It is 8～10% chlorine bleach liquor that described hypochlorite can be Losantin or effective chlorine density.
Described permanganate can be potassium permanganate; Described persulphate can be ammonium persulphate.
A kind of separation and recovery method of aluminium plastic composite packaging is characterized in that it comprises following operation steps:
1) classification: aluminium plastic composite packaging material is classified and cut out, be cut into 2～3 centimetres of wide strips;
2) feed intake: aluminium plastic composite packaging material is immersed in 40 ℃～80 ℃ containing in the separating agent that concentration is 5～20% sulfuric acid or phosphoric acid, 0.1～0.5% cats product, stirs;
3) add oxygenant: add clorox or Losantin, stir;
Perhaps:
It is that aluminium plastic composite packaging material is immersed in 40 ℃～80 ℃ only containing in the separating agent that concentration is 5～20% sulfuric acid or phosphoric acid that second step fed intake, and stirs;
The 3rd step added oxygenant: add permanganate or persulphate, stir;
4) soak: aluminium lamination and plastic layer are peeled off automatically about 1～20 minute;
5) washing: wrapping material are washed through two to three clear water, remove the remaining separating agent in surface;
6) separate: aluminium foil is separated with plastic layer;
7) plastic layer decolouring: plastic layer is soaked in the warm water of 40 ℃～60 ℃ 2～5% superoxols or 40 ℃～60 ℃, yellow is sloughed about 10 minutes;
8) drying: aluminium foil and plastic layer are dry respectively.
Cats product described in the step 2 is sodium lauryl sulphate or sodium laurylsulfonate.
In the separating agent that the present invention adopts, be one of main component with sulfuric acid and phosphoric acid.Because sulfuric acid and phosphoric acid are fixed acid, do not have unpleasant odor, can provide good working environment for the operator.Secondly, the acidity of sulfuric acid and phosphoric acid is stronger, compares with weak acid to have speed of response faster.Moreover the speed of response of sulfuric acid and phosphoric acid and metal is slow than nitric acid, and this just makes sulfuric acid in that the highly acid while is provided, and can significantly reduce the corrosion dissolution to aluminium lamination, improves the rate of recovery of aluminium foil, has reduced the consumption to acid.If aluminium lamination seriously dissolves attenuation, also can cause the aluminium foil strength degradation, make aluminium lamination and plastic layer be difficult to separate, use sulfuric acid or phosphoric acid to solve this problem well.
In the separating agent that the present invention adopts, oxygenant is another kind of composition.The oxygenant that is adopted among the present invention is hypochlorite, permanganate or persulphate.These oxygenants, under vitriolic synergy, can the rapid damage aluminium lamination and plastic layer between tackiness agent, improve the velocity of separation of aluminium plastic composite packaging greatly.
When the oxygenant that the present invention selects for use is hypochlorite, also contain cats product in the separating agent.When using hypochlorite as oxygenant, oxidizing gas is emitted in the strong acid reaction in hypochlorite and the separating agent system.Tensio-active agent can dispersion and the dissolving of promotes oxidn gas in water, strengthens the action effect of oxygenant.In addition, when using sulfuric acid and Losantin simultaneously in prescription, tensio-active agent can be avoided the formation of calcium sulfate precipitation on the Losantin surface, and reaction can be carried out smoothly.The employed cats product of this patent is sodium lauryl sulphate or sodium laurylsulfonate.
In the separation and recovery method concrete operations step:
1, the proper classification of wrapping material and cutting out: aluminium plastic composite packaging has bilayer, three layers etc. dissimilar, the employed separating agent difference of dissimilar wrapping material, disengaging time is also different, so should carry out separating reaction respectively with after the wrapping material classification and cutting out.
2, acid concentration is 5%～20%: acid concentration increases, and velocity of separation can increase.But when acid concentration is big, when from separating agent, taking out wrapping material, can cause waste in the remaining more acid solution of package material surface.Also need to strengthen the bath water amount thus and increase washing times.The determined acid concentration of the present invention is 5%～20%.
3, oxidant concentration: oxygenant has strong oxidizing property.General oxygenant is unstable under strongly-acid and heating condition, too much add oxygenant and can only increase the quantity that oxygenant decomposes.The determined oxidant concentration of the present invention is expressed as follows:
Losantin: 0.2～1%
Clorox: 0.2～1%
Potassium permanganate: 1%
Ammonium persulphate: 1%
4, the selection of cats product: tensio-active agent can promote dispersion and the dissolving of gas in water that hypochlorite is emitted.But when using potassium permanganate and ammonium persulphate, cannot add tensio-active agent as oxygenant.Tensio-active agent can make potassium permanganate and ammonium persulphate lose efficacy rapidly.
5, stir.Stirring can make wrapping material and separating agent uniform contact, avoids the generation of small part adhesion phenomenon.
6, temperature.Temperature high score more is fast more from speed.But when temperature surpasses 90 ℃, can cause certain infringement to plastic layer, deepen the color and luster of plastics, the recovery that influences plastic layer is used, so the present invention is controlled at 40 ℃～80 ℃ with soaking temperature.
7, the reaction times.Separating agent prescription involved in the present invention can significantly reduce the reaction times, improves separation efficiency, save energy.The change of separating agent prescription and aluminium plastic composite packaging material different, the reaction times can change to some extent.Separating agent provided by the present invention and separation method can make the shortest person of disengaging time reach 1～2 minute, and general aluminium plastic composite packaging material can reach in 10～20 minutes fully automatically and separate.
8, decolouring.Separation method provided by the invention is by the adhesion layer between separating agent destruction aluminium foil and plastic layer, and makes the two isolating.With after plastic layer separates, remaining tackiness agent can make plastic layer show darker color at aluminium foil layer.By in the warm water of 40 ℃～60 ℃ 2～5% superoxols or 40 ℃～60 ℃, decolouring, can remove the yellow of plastic layer, improve the recovery value of plastic layer.
Embodiment
Embodiment 1
It is in 20% the phosphoric acid solution that the 0.5g sodium lauryl sulphate is dissolved in 500ml concentration, is warming up to 60 ℃.Add three layers of aluminium plastic composite packaging material 9.3g that cut out, stir.Drop into the 2g Losantin again, stir.Reach after 2 minutes fully and separate.Take out separated object, after the washing, aluminium lamination convection drying, plastic layer are dry again after decolouring.The quality of final aluminium lamination is 2.6g, and the quality of plastic layer is 6.6g.
Embodiment 2
It is in 10% the phosphoric acid solution that the 1.5g sodium lauryl sulphate is dissolved in 500ml concentration, is warming up to 80 ℃.Adding three layers of aluminium plastic composite packaging material 9.3g that cut out stirs.Drop into the 5g effective chlorine density again and be 8% chlorine bleach liquor, stir.Reach after 1 minute fully and separate.Take out separated object, after the washing, aluminium lamination convection drying, plastic layer are dry again after decolouring.The quality of final aluminium lamination is 2.4g.The quality of plastic layer is 6.8g.
Embodiment 3
It is in 10% the sulphuric acid soln that the 2.5g sodium laurylsulfonate is dissolved in 500ml concentration, is warming up to 60 ℃.Add three layers of aluminium plastic composite packaging material 11.9g that cut out, stir.Drop into the 5g Losantin again, stir.Reach after 7 minutes fully and separate.Take out separated object, after the washing, row is dry again after decolouring for aluminium lamination convection drying, plastic layer.The quality of final aluminium lamination is 6.2g, the quality 5.0g of plastic layer.
Embodiment 4
In the concentration of 50 ℃ of 500ml is 10% sulphuric acid soln, drop into three layers of aluminium plastic composite packaging material 10.8g that cut out, stir.Drop into the 5g ammonium persulphate, stir.Reach after 20 minutes fully and separate.Take out separated object, after the washing, aluminium lamination convection drying, plastic layer are dry again after decolouring.Treat that the quality of weighing aluminium lamination is 5.8g behind the complete drying, the quality of plastic layer is 4.9g.
Embodiment 5
In the concentration of 40 ℃ of 500ml is 5% sulphuric acid soln, drop into the double-deck aluminium plastic composite packaging material 10.7g that cuts out, stir.Drop into 5g potassium permanganate, stir.Reach after 20 minutes fully and separate.Take out separated object, after the washing, aluminium lamination convection drying, plastic layer are dry again after decolouring.Treat that the quality of weighing aluminium lamination is 5.5g behind the complete drying, the quality of plastic layer is 5.1g.
Embodiment 6
The concentration that the 2.5g sodium lauryl sulphate is dissolved in 80 ℃ of 500ml is in 10% the phosphoric acid solution, to drop into three layers of aluminium plastic composite packaging material 9.2g that cut out, and stirs.Drop into the 1g Losantin, stir.Reach after 2 minutes fully and separate.Take out separated object, after the washing, aluminium lamination convection drying, plastic layer are dry again after decolouring.Treat that the quality of weighing aluminium lamination is 2.5g behind the complete drying, the quality of plastic layer is 6.8g.
Embodiment 7
The concentration that the 0.5g sodium laurylsulfonate is dissolved in 70 ℃ of 500ml is in 10% the phosphoric acid solution, to drop into three layers of aluminium plastic composite packaging material 9.3g that cut out, and stirs.Input 2g effective chlorine density is 8% chlorine bleach liquor, stirs.Reach after 3 minutes fully and separate.Take out separated object, after the washing, aluminium lamination convection drying, plastic layer are dry again after decolouring.Treat that the quality of weighing aluminium lamination is 2.4g behind the complete drying, the quality of plastic layer is 6.8g.
Embodiment 8
The 1.5g sodium laurylsulfonate is dissolved in 5% the phosphoric acid solution of 80 ℃ of 500ml, drops into three layers of aluminium plastic composite packaging material 13.2g that cut out, stir.Input 1g effective chlorine density is 8% chlorine bleach liquor, stirs.Reach after 2 minutes fully and separate.Take out separated object, after the washing, aluminium lamination convection drying, plastic layer are dry again after decolouring.Treat that the quality of weighing aluminium lamination is 7.1g behind the complete drying, the quality of plastic layer is 6.1g.
Claims (7)
1, a kind of aluminium plastic composite packaging separating agent, it is characterized in that: described separating agent is that 5～20% sulfuric acid and oxygenant or concentration are that 5～20% phosphoric acid and oxygenant are formed by concentration, and the ratio of weight and number of described sulphuric acid soln or phosphoric acid solution and oxygenant is 100: 0.2～1; Wherein said oxygenant is hypochlorite, permanganate or persulphate; When oxygenant is hypochlorite, also include cats product in the separating agent, the ratio of weight and number between sulfuric acid or phosphoric acid solution, hypochlorite and cats product is 100: 0.2～1: 0.1～0.5; Described cats product is sodium lauryl sulphate or sodium laurylsulfonate.
2, aluminium plastic composite packaging separating agent according to claim 1 is characterized in that: described hypochlorite is that Losantin or effective chlorine density are 8～10% chlorine bleach liquor.
3, aluminium plastic composite packaging separating agent according to claim 1 is characterized in that: described permanganate is a potassium permanganate.
4, aluminium plastic composite packaging separating agent according to claim 1 is characterized in that: described persulphate is an ammonium persulphate.
5, a kind of separation and recovery method of aluminium plastic composite packaging is characterized in that it comprises following operation steps:
1) classification: aluminium plastic composite packaging material is classified and cut out;
2) feed intake: with aluminium plastic composite packaging material be immersed in 40 ℃～80 ℃ to contain concentration be 5～20% sulfuric acid or phosphoric acid, cats product or only contain in the separating agent that concentration is 5～20% sulfuric acid or phosphoric acid, stir; Described cats product is sodium lauryl sulphate or sodium laurylsulfonate;
3) add oxygenant, stir; Described oxygenant is hypochlorite, permanganate or persulphate;
4) soak: soak 1～20 minute aluminium lamination and plastic layer and peel off automatically;
5) washing: wrapping material are washed through two to three clear water, remove the remaining separating agent in surface;
6) separate: aluminium foil is separated with plastic layer;
7) plastic layer decolouring: plastic layer is soaked in the warm water of 40 ℃～60 ℃ 2～5% superoxols or 40 ℃～60 ℃, yellow was sloughed in 10 minutes;
8) drying: aluminium lamination and plastic layer are dry respectively.
6, according to the separation and recovery method of the described aluminium plastic composite packaging of claim 5, it is characterized in that:
Second step fed intake: aluminium plastic composite packaging material is immersed in 40 ℃～80 ℃ containing in the separating agent that concentration is 5～20% sulfuric acid or phosphoric acid, cats product, then the oxygenant that adds in the 3rd step is a hypochlorite, and described hypochlorite is that Losantin or effective chlorine density are 8～10% chlorine bleach liquor.
7, the separation and recovery method of aluminium plastic composite packaging according to claim 5 is characterized in that:
Second step fed intake, and aluminium plastic composite packaging material is immersed in 40 ℃～80 ℃ only containing in the separating agent that concentration is 5～20% sulfuric acid or phosphoric acid, and then the oxygenant that adds in the 3rd step is permanganate or persulphate.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2007100618343A CN100526373C (en) | 2007-04-30 | 2007-04-30 | Aluminum-plastic composite packing separating agent and method of separating and reclaiming the same |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2007100618343A CN100526373C (en) | 2007-04-30 | 2007-04-30 | Aluminum-plastic composite packing separating agent and method of separating and reclaiming the same |
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| CN100526373C true CN100526373C (en) | 2009-08-12 |
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| CN114369285A (en) * | 2022-03-10 | 2022-04-19 | 巩义市瑞赛克机械设备有限公司 | Method for separating aluminum-plastic composite membrane by using normal-temperature alkali |
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