CN105461954A - Method for recycling nylon/polyolefin composite membrane waste materials - Google Patents
Method for recycling nylon/polyolefin composite membrane waste materials Download PDFInfo
- Publication number
- CN105461954A CN105461954A CN201510918206.7A CN201510918206A CN105461954A CN 105461954 A CN105461954 A CN 105461954A CN 201510918206 A CN201510918206 A CN 201510918206A CN 105461954 A CN105461954 A CN 105461954A
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- Prior art keywords
- nylon
- container
- acid
- composite membrane
- solute
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J11/00—Recovery or working-up of waste materials
- C08J11/04—Recovery or working-up of waste materials of polymers
- C08J11/06—Recovery or working-up of waste materials of polymers without chemical reactions
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2377/00—Characterised by the use of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Derivatives of such polymers
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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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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a method for recycling nylon/polyolefin composite membrane waste materials, which comprises steps: an acid liquor and water in a first container are prepared to be a certain concentration of water solution of acids, the water solution of acids which is prepared in the step 1 is heated, nylon/polyolefin composite membrane waste materials are added into the first container, and is repeatedly soaked to treat in a first container, a separated nylon film on a lower layer is taken out simultaneously, a polyolefin film is filtered out after dissolving, then a certain amount of acid solution with nylon dissolved matters in the first container is added into a second container, a certain amount of water is further added into the second container to dilute the acid solution, the nylon dissolved matters are separated out from a mixed solution to be precipitated, nylon dissolved matter precipitate is filtered, and residual diluted mixed acid water solutions are added into the first container to to be recycled through evaporation and concentration at last. The method for recycling the nylon/polyolefin composite membrane waste materials has excellent social benefits, environment benefits and economic benefits.
Description
Technical field
The present invention relates to the recovery and reuse technology field of macromolecular material, especially a kind of recovery method of nylon/polyolefin composite membrane waste material.
Background technology
Nylon/polyolefin composite membrane sticks with glue agent by nylon membrane and polyolefin film to be composited through compounding machine dry type, or be composited through multi-layer co-extruded by nylon raw material and polyolefinic raw materials.This composite membrane has very high physical strength and gas barrier property, and the precision in a large number for food, medicine, electronics and noble metal component of machine is packed, and is one of main material of Flexible-Packaging Industry.
Nowadays the mankind are while a large amount of production and consumption nylon/polyolefin composite membrane, and a large amount of nylon/polyolefin composite membrane waste material of inevitable generation, no matter the process of this waste material is for resource reclaim recycle or environment protection, all very important.Very simple for the processing mode of this composite membrane waste material on current market, processing mode is as follows:
1) for the scrap stock produced in production process and useless coating materials, the mode reclaiming granulation is generally taked, in granulation process, or add appropriate maleic anhydride grafts, obtain nylon and polyolefine mixed regeneration material, can only be used for the plastic prod comparing low side, economic benefit is extremely low;
2) for the discarded nylon/polyolefin composite membrane product produced in commercially process of consumption, due to too many containing impurity, direct recovery granulation cost is too high, generally take refuse landfill landfill or Refuse bin burning disposal, both resource was wasted, land occupation again, and comparatively havoc is caused to environment.
Summary of the invention
In order to overcome defect of the prior art, provide a kind of recovery method of nylon/polyolefin composite membrane waste material.
The present invention is realized by following proposal:
A recovery method for nylon/polyolefin composite membrane waste material, comprises the following steps:
The first step, is mixed with certain density aqueous acid by acid solution and water in the first container, and in described aqueous acid, the mass concentration scope of acid is 10% ~ 90%;
Second step, the aqueous acid prepared in the heating the first step, and the temperature of aqueous acid is controlled at 50 DEG C ~ 110 DEG C;
3rd step, nylon/polyolefin composite membrane waste material is added in the first container, soak and stir 10-60 minute or more, the nylon membrane that lower floor has been separated is sent cleaning simultaneously, recycle after drying, after nylon layer dissolves completely in residue composite membrane, polyolefin film is leached washing, recycle after drying;
4th step, immersion treatment nylon/polyolefin composite membrane waste material repeatedly in the first container, the mass concentration controlling nylon solute in aqueous acid adheres to solute to avoid polyolefin film;
5th step, joins a certain amount of acid solution containing nylon solute in the first container in second container, then in second container, add the dilution of a certain amount of water, is separated out by nylon solute and precipitate from mixed solution;
6th step, leaches nylon solute precipitation, through washing, dries, obtains pure nylon solute powder;
7th step, can drop into the first container recycle by the rare aqueous acid obtained after evaporation concentration.
In a first step, described acid solution is one or more mixing acid in sulfuric acid, hydrochloric acid, phosphoric acid, nitric acid, acetic acid, oxalic acid.
In the 4th step, the mass concentration < 20% of nylon solute in described aqueous acid.
In the 5th step, be add more than 20% containing nylon solute acid solution quality in second container in the quality adding the diluting water in second container.
Beneficial effect of the present invention is:
The recovery method of a kind of nylon/polyolefin of the present invention composite membrane waste material cannot fully to be recycled nylon/polyolefin composite membrane waste material and it is to this outstanding problem of the pollution of environment for current, develop a kind of for nylon/polyolefin composite membrane waste recovery process new technology, nylon layer in composite membrane is separated completely with polyolefin layer, recycling respectively.Current domestic PA/PE composite film packaging bag, the PA/PE composite membrane produced every year and compound membrane bag waste material are probably at 300,000 tons, if recovery method of the present invention is realized industrialization, recycle for all waste materials relating to coextrusion nylon film packaging industry in the market, the profit of 2000 yuan can be realized after waste disposal per ton, then can save the petroleum resources of more than 250,000 tons every year, at least create the economic benefit of 600,000,000 yuan, and the white pollution that plastic refuse causes can be reduced in a large number, there is obvious social benefit, environmental benefit and economic benefit.
Embodiment
Below in conjunction with specific embodiment, the preferred embodiment of the invention is further illustrated:
Embodiment 1
A recovery method for nylon/polyolefin composite membrane waste material, comprises the following steps:
The first step, is mixed with certain density aqueous acid by acid solution and water in the first container, and in described aqueous acid, the mass concentration scope of acid is 80%;
Second step, the aqueous acid prepared in the heating the first step, and the temperature of aqueous acid is controlled at 80 DEG C;
3rd step, adds nylon/polyolefin composite membrane waste material in the first container, soaks and stirs 10 minutes, the nylon membrane that lower floor has been separated is sent cleaning simultaneously, recycle after drying, after nylon layer dissolves completely in residue composite membrane, polyolefin film is leached washing, recycles after drying;
4th step, immersion treatment nylon/polyolefin composite membrane waste material repeatedly in the first container, controls the mass concentration of nylon solute in aqueous acid;
5th step, joins a certain amount of acid solution containing nylon solute in the first container in second container, then in second container, add the dilution of a certain amount of water, is separated out by nylon solute and precipitate from mixed solution;
Wherein, the concrete steps of the 5th step are: when the content dissolving nylon in aqueous acid in the first container reaches the 1%-15% of aqueous acid total mass, put in second container by aqueous acid a certain amount of in the first container;
In second container, add the aqueous acid of water dilution containing nylon solute, the quality of the water added is wherein containing more than 20% of nylon solute acid solution quality.White Nylon solute is separated out in solution;
White Nylon solute precipitated from mixing aqueous acid and leaches, obtaining white Nylon solute.
6th step, leaches nylon solute precipitation, through washing, dries, obtains pure nylon solute powder;
7th step, by rare aqueous acid of obtaining through evaporation concentration recycle.
In a first step, described acid solution is acetic acid.
In the 4th step, the mass concentration 5% of nylon solute in described aqueous acid.
In the 5th step, be add more than 31% containing nylon solute acid solution quality in second container in the quality adding the diluting water in second container.
Embodiment 2
A recovery method for nylon/polyolefin composite membrane waste material, comprises the following steps:
The first step, is mixed with certain density aqueous acid by acid solution and water in the first container, and in described aqueous acid, the mass concentration scope of acid is 20%;
Second step, the aqueous acid prepared in the heating the first step, and the temperature of aqueous acid is controlled at 100 DEG C;
3rd step, adds nylon/polyolefin composite membrane waste material in the first container, soaks and stirs 35 minutes, the nylon membrane that lower floor has been separated is sent cleaning simultaneously, recycle after drying, after nylon layer dissolves completely in residue composite membrane, polyolefin film is leached washing, recycles after drying;
4th step, immersion treatment nylon/polyolefin composite membrane waste material repeatedly in the first container, controls the mass concentration of nylon solute in aqueous acid;
5th step, joins a certain amount of acid solution containing nylon solute in the first container in second container, then in second container, add the dilution of a certain amount of water, is separated out by nylon solute and precipitate from mixed solution;
6th step, leaches nylon solute precipitation, through washing, dries, obtains pure nylon solute powder;
7th step, by rare aqueous acid of obtaining through evaporation concentration recycle.
In a first step, described acid solution is sulfuric acid.
In the 4th step, the mass concentration 9% of nylon solute in described aqueous acid.
In the 5th step, be add more than 40% containing nylon solute acid solution quality in second container in the quality adding the diluting water in second container.
Embodiment 3
A recovery method for nylon/polyolefin composite membrane waste material, comprises the following steps:
The first step, is mixed with certain density aqueous acid by acid solution and water in the first container, and in described aqueous acid, the mass concentration scope of acid is 50%;
Second step, the aqueous acid prepared in the heating the first step, and the temperature of aqueous acid is controlled at 60 DEG C;
3rd step, adds nylon/polyolefin composite membrane waste material in the first container, soaks and stirs 60 minutes, the nylon membrane that lower floor has been separated is sent cleaning simultaneously, recycle after drying, after nylon layer dissolves completely in residue composite membrane, polyolefin film is leached washing, recycles after drying;
4th step, immersion treatment nylon/polyolefin composite membrane waste material repeatedly in the first container, controls the mass concentration of nylon solute in aqueous acid;
5th step, joins a certain amount of acid solution containing nylon solute in the first container in second container, then in second container, add the dilution of a certain amount of water, is separated out by nylon solute and precipitate from mixed solution;
6th step, leaches nylon solute precipitation, through washing, dries, obtains pure nylon solute powder;
7th step, by rare aqueous acid of obtaining through evaporation concentration recycle.
In a first step, described acid solution is the mixing acid of hydrochloric acid, phosphoric acid.
In the 4th step, the mass concentration 3% of nylon solute in described aqueous acid.
In the 5th step, be add more than 50% containing nylon solute acid solution quality in second container in the quality adding the diluting water in second container.
Although done comparatively detailed elaboration to technical scheme of the present invention and enumerated; be to be understood that; to those skilled in the art; amendment is made to above-described embodiment or adopts equivalent replacement scheme; this is apparent to those skilled in the art; these modifications or improvements without departing from theon the basis of the spirit of the present invention, all belong to the scope of protection of present invention.
Claims (4)
1. a recovery method for nylon/polyolefin composite membrane waste material, is characterized in that, comprises the following steps:
The first step, is mixed with certain density aqueous acid by acid solution and water in the first container, and in described aqueous acid, the mass concentration scope of acid is 10% ~ 90%;
Second step, the aqueous acid prepared in the heating the first step, and the temperature of aqueous acid is controlled at 50 DEG C ~ 110 DEG C;
3rd step, nylon/polyolefin composite membrane waste material is added in the first container, soak and stir 10-60 minute or more, the nylon membrane that lower floor has been separated is sent cleaning simultaneously, recycle after drying, after nylon layer dissolves completely in residue composite membrane, polyolefin film is leached washing, recycle after drying;
4th step, immersion treatment nylon/polyolefin composite membrane waste material repeatedly in the first container, controls the mass concentration of nylon solute in aqueous acid;
5th step, joins a certain amount of acid solution containing nylon solute in the first container in second container, then in second container, add the dilution of a certain amount of water, is separated out by nylon solute and precipitate from mixed solution;
6th step, leaches nylon solute precipitation, through washing, dries, obtains pure nylon solute powder;
7th step, can drop into the first container recycle by the rare aqueous acid obtained through evaporation concentration.
2. the recovery method of a kind of nylon/polyolefin composite membrane waste material according to claim 1, is characterized in that: in a first step, and described acid solution is one or more mixing acid in sulfuric acid, hydrochloric acid, phosphoric acid, nitric acid, acetic acid, oxalic acid.
3. the recovery method of a kind of nylon/polyolefin composite membrane waste material according to claim 1, is characterized in that: in the 4th step, the mass concentration < 20% of nylon solute in described aqueous acid.
4. the recovery method of a kind of nylon/polyolefin composite membrane waste material according to claim 1, it is characterized in that: in the 5th step, is add more than 20% containing nylon solute acid solution quality in second container in the quality adding the diluting water in second container.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510918206.7A CN105461954B (en) | 2015-12-10 | 2015-12-10 | A kind of recovery method of nylon/polyolefin composite membrane waste material |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510918206.7A CN105461954B (en) | 2015-12-10 | 2015-12-10 | A kind of recovery method of nylon/polyolefin composite membrane waste material |
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| CN105461954A true CN105461954A (en) | 2016-04-06 |
| CN105461954B CN105461954B (en) | 2018-10-02 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111607123A (en) * | 2020-05-15 | 2020-09-01 | 宁波坚锋新材料有限公司 | Method for recovering nylon/polyolefin composite membrane by using ionic liquid |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1278536A (en) * | 1999-06-16 | 2001-01-03 | 张高文 | Waste foamed plastic product recovering and regenerating process |
| CN102952289A (en) * | 2011-08-22 | 2013-03-06 | 小田产业株式会社 | Method and device for separating polyolefin-containing composite plastics |
| CN105058620A (en) * | 2015-08-10 | 2015-11-18 | 安徽博邦超纤皮革有限公司 | Separation method for polyurethane and nylon mixed powder and application of separation method |
-
2015
- 2015-12-10 CN CN201510918206.7A patent/CN105461954B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1278536A (en) * | 1999-06-16 | 2001-01-03 | 张高文 | Waste foamed plastic product recovering and regenerating process |
| CN102952289A (en) * | 2011-08-22 | 2013-03-06 | 小田产业株式会社 | Method and device for separating polyolefin-containing composite plastics |
| CN105058620A (en) * | 2015-08-10 | 2015-11-18 | 安徽博邦超纤皮革有限公司 | Separation method for polyurethane and nylon mixed powder and application of separation method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111607123A (en) * | 2020-05-15 | 2020-09-01 | 宁波坚锋新材料有限公司 | Method for recovering nylon/polyolefin composite membrane by using ionic liquid |
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| CN105461954B (en) | 2018-10-02 |
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Address after: 518118 Guangdong province Shenzhen City Pingshan Pingshan area Bi Ling Jie (Ping) Wanda Industrial Area No. 1 Building No. -4 Applicant after: Shenzhen Wanda Jie environmental protection new materials Limited by Share Ltd Address before: 518118 Guangdong province Shenzhen City Pingshan Pingshan area Bi Ling Jie (Ping) Wanda Industrial Area No. 1 Building No. -4 Applicant before: Shenzhen City Wandajie Plastic Co., Ltd. |
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