CN101591487A - A kind of surface paint removal and stripping treatment agent for waste pop can - Google Patents
A kind of surface paint removal and stripping treatment agent for waste pop can Download PDFInfo
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- CN101591487A CN101591487A CNA2009100696337A CN200910069633A CN101591487A CN 101591487 A CN101591487 A CN 101591487A CN A2009100696337 A CNA2009100696337 A CN A2009100696337A CN 200910069633 A CN200910069633 A CN 200910069633A CN 101591487 A CN101591487 A CN 101591487A
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- pop
- treatment agent
- formic acid
- paint removal
- methylene dichloride
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Abstract
A kind of surface paint removal and stripping treatment agent for waste pop can of written or printed documents disclosure of the Invention, this surface treatment agent is made up of formic acid, methylene dichloride, water.Compound method is in the container of the aqueous formic acid of predetermined fraction being inserted splendid attire methylene dichloride.Utilize this remover, pop can is carried out demoulding handle, 10～15 minutes coating foamings of pop can outer wall lacquer, coating all came off in 30 minutes; The inwall film came off in 20 minutes fully, and it is fast that this treatment agent has paint removal and stripping speed, repeating utilization factor height, and advantage such as low price.
Description
Technical field
The present invention discloses a kind of surface paint removal and stripping treatment agent for waste pop can and collocation method.
Technical background
To 1,800 hundred million of the annual consumption in last century Mo whole world pop cans, consumption aluminium accounts for about 15% of world aluminum consumption up to more than 250 ten thousand tons.The reclaiming utilization of pop can both can be saved bauxite, also can save 97% the energy.Waste and old aluminum easy open can be made again high-quality aluminum or aluminum alloy material, must be carried out strict pre-treatment.
The recovery utilization rate of developed country's waste top-pop is higher, can reach 60-80%.The approach that utilizes of external waste top-pop mainly is: 1, produce steel making deoxidant; 2, produce the regeneration aluminium ingot; 3, produce a kind of product of approximate fine aluminium ingot, do the raw material of alloying ingredient; 4, be smelted into the aluminium alloy of the former trade mark (3004), be directly used in the production pop can.Wherein, the aluminium alloy that utilizes waste top-pop to produce the former trade mark is an optimal path.China is the highest country of the waste top-pop rate of recovery in the world, almost not waste, and simultaneously, China is again that waste top-pop utilizes the lower country of class in the world, the waste top-pop of recovery (waste top-pop that comprises import) all is lowered class and uses.Simultaneously, because many business equipments basis is poor, state of the art is low, causes environmental pollution serious, cost height, the situation of poor product quality.
The recycling of waste top-pop starts from the U.S. in the eighties of last century sixties, recovery technology has also been passed through several stages, be waste top-pop in bulk to be added in the stove be melted into the regeneration aluminium ingot the earliest, found afterwards that scaling loss was bigger, and then waste top-pop packed, improve its density, reduce surface-area, metal recovery rate significantly improves, but still is the regeneration aluminium ingot.
Owing in order to protect pop can to exempt corrosion effectively, increase its aesthetic feeling simultaneously, the electrostatic painting processing is carried out on the pop can surface usually, and this coating adhesion is strong, and is incrust.Directly contact with beverage for fear of aluminium in addition, reduce the content of aluminium in the beverage, prevent that simultaneously aluminium from producing galvanic corrosion, its inwall utilizes water-based modification epoxy pop can inner-wall paint to form a skim, the anti-strong acid of inwall film, highly basic and most of organic solvent.But just because these characteristics, make in the metal vessel recycling process, electrostatic spraying powder, baking vanish coating and metal vessel inner wall anti-corrosive film are removed becomes stubborn problem the most, if deal with improperly, these will become the impurity in the metal recovery, reduce the purity of metal greatly, can cause pollution simultaneously environment.
Paint removal and stripping rate and treatment process thereof directly have influence on the cost of the quality of the aluminum or aluminum alloy material of making and utilization and environmental pollution etc.Paint removal technology in the metal current removal process roughly has following several: (1) sandblast paint removal: can remove enamelled coating with sand papering, but when the mode that adopts sand papering is handled, length consuming time and clearance can not guarantee stably to reach 100%, are not suitable for scale operation.(2) vitriol oil paint removal: utilize the characteristic of vitriol oil passivation to remove the enamelled coating on aluminium pot surface.The reaction of organism in the vitriol oil and the enamelled coating and oxide compound, not with aluminium alloy in the composition reaction, i.e. passivation effect.This method cost is low, paint removal rate height, and the aluminium recovery height, impure few, paint removal speed is fast.But can not play the effect of membrane removal substantially, and complex process.(3) organic solvent paint removal:, adopt organic solution dissolving organic varnish according to " similar mixing " principle between organism.Advantage: paint removal rate height, the aluminium recovery height is impure few; Shortcoming: the paint removal rate is influenced obviously by solvent strength.(4) hot paint removal method: in High Temperature Furnaces Heating Apparatus, heat.Advantage: method is simple, good manufacturability; Shortcoming: seriously polluted, foreign matter content height, cost height, energy consumption height.
Invented the use ethylene dichloride at Chinese patent CN 93107391.X, phenol, paraffin, sodium acetate, acetate, oxalic acid and alkenyl succinic acid plural components demoulding; Chinese patent CN 89105154.6 has invented use N-BUTYL ACETATE, formic acid, cresols, phenol, acetone, pimelinketone plural components demoulding.Above method needs drug variety too much, and removal that can only be simple surface baking vanish coating, and can not remove the inwall film.In a kind of improvement technology of removing glue, removing lacquer craftwork of Chinese invention patent CN02137088.5 invention.In the process that copper-clad plate scrap stock, waste enameled wire, waste top-pop are recycled, high temperature removes glue, high temperature paint removal meeting produces the harmful smoke contaminate environment.The present invention is the harmful smoke that high temperature is removed glue, high temperature paint removal generation, introduces in the combustion chamber more than 200 ℃ and burns, and makes it to become harmless gas.Li Quanxiang etc. disclose at Chinese CN101392384 a kind ofly can remove pop can surface baking vanish coating and inner wall anti-corrosive film surface treatment agent simultaneously, and this surface treatment agent is made up of methylene dichloride, trifluoroacetic acid, water.This treatment agent has good paint removal and stripping effect, and face and processing speed are very fast, and the repeating utilization factor height.But the trifluoroacetic acid price of using in this treatment agent is expensive.
Summary of the invention
Purpose of the present invention according to the deficiency of above-mentioned paint removal and stripping technology, provides a kind of treatment agent that can handle pop can surface enamelled coating and inner wall anti-corrosive film simultaneously, and it is fast that this treatment agent has paint removal and stripping speed, repeating utilization factor height, and advantage such as low price.
Waste and old easy open can paint removal and stripping provided by the present invention agent is characterized by by formic acid, methylene dichloride, water and forms, and forms each component of this agent, and it is as follows to calculate share by volume:
(1) formic acid 40～80
(2) methylene dichloride 10～40
(3) water 10～20
Formic acid has the performance of the sticking power that reduces rete and metal substrate; Methylene dichloride then makes its rete expand, and breaks away from metal substrate, helps to accelerate trifluoroacetic acid and infiltrates between rete and the metal substrate; Water mixes with formic acid, and forms suspension in methylene dichloride, can effectively suppress the trifluoroacetic acid volatilization.
A kind of collocation method that can handle pop can surface baking vanish coating and inner wall anti-corrosive film treatment agent simultaneously provided by the present invention comprises following step:
(1) formic acid of predetermined fraction is soluble in water, make aqueous formic acid;
(2) aqueous formic acid is inserted in the container of splendid attire methylene dichloride and stir.
Utilize this treatment agent, pop can is carried out depainting handle the experiment discovery, impregnated enamelled coating bubbled in the time of 10～15 minutes, all came off in about 30 minutes, and inwall will all come off in thin film dipped about 20 minutes.Described dose the mechanism of action is mainly utilized the deep-etching ability of formic acid, destroys the cohesive force of tackiness agent between enamelled coating and lacquer, film and tank body, by the methylene dichloride hypertonicity, adds lacquer, film and tank body gap, and then comes off again.Described pop can surface treatment agent repeating utilization factor is higher, and is less to the consumption of solvent, greatly reduces processing cost.
Embodiment
Below by most preferred embodiment, further describe its inventive features.
Embodiment one:
Each component of agent, it is as follows to calculate share by volume:
(1) formic acid 40
(2) methylene dichloride 40
(3) water 20
Embodiment two:
Each component of agent, it is as follows to calculate share by volume:
(1) formic acid 60
(2) methylene dichloride 25
(3) water 15
Embodiment three:
Each component of agent, it is as follows to calculate share by volume:
(1) formic acid 60
(2) methylene dichloride 15
(3) water 25
Embodiment four:
Each component of agent, it is as follows to calculate share by volume:
(1) formic acid 80
(2) methylene dichloride 10
(3) water 10
Each component raw material in the treatment agent of the present invention, its purity are the technical pure level.
Claims (2)
1, a kind of waste and old easy open can paint removal and stripping treatment agent is characterized by by formic acid, methylene dichloride, water and forms, and forms each component of this agent, and it is as follows to calculate share by volume:
(1) formic acid 40～80
(2) methylene dichloride 10～40
(3) water 10～20
Described surface paint removal and stripping treatment agent for waste pop can is characterized by and can remove pop can surface baking vanish coating, can remove the anticorrosion film of container inner wall again.
2. the preparation method of a surface paint removal and stripping treatment agent for waste pop can according to claim 1 may further comprise the steps:
(1) formic acid of predetermined fraction is soluble in water, make aqueous formic acid,
(2) aqueous formic acid is inserted in the container of splendid attire methylene dichloride and stir.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100696337A CN101591487A (en) | 2009-07-08 | 2009-07-08 | A kind of surface paint removal and stripping treatment agent for waste pop can |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100696337A CN101591487A (en) | 2009-07-08 | 2009-07-08 | A kind of surface paint removal and stripping treatment agent for waste pop can |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101591487A true CN101591487A (en) | 2009-12-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2009100696337A Pending CN101591487A (en) | 2009-07-08 | 2009-07-08 | A kind of surface paint removal and stripping treatment agent for waste pop can |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102087073A (en) * | 2011-02-25 | 2011-06-08 | 丰城市环球资源再生科技发展有限公司 | De-painting kiln for pop can |
| CN102747375A (en) * | 2012-06-15 | 2012-10-24 | 兰州理工大学 | Paint remover for internal and external surface paint films of aluminum pop can and use method |
| CN104674273A (en) * | 2013-11-28 | 2015-06-03 | 沈阳黎明航空发动机(集团)有限责任公司 | High-temperature sealant removing agent and preparation method thereof |
| CN106929874A (en) * | 2017-01-06 | 2017-07-07 | 东台立讯精密电子技术有限公司 | Aluminium punching press diaphragm demoulding liquid medicine and method for demoulding |
| CN110016679A (en) * | 2019-04-14 | 2019-07-16 | 广州恒荣电子科技有限公司 | A kind of screen frame detergent for wiring board |
| CN110057194A (en) * | 2019-05-08 | 2019-07-26 | 衢州超越环保科技有限公司 | A kind of waste and old easy open can surface depainting process device |
| CN112143894A (en) * | 2019-06-28 | 2020-12-29 | 铜陵富翔铜再生循环利用有限公司 | Method for recovering copper from waste enameled wire |
-
2009
- 2009-07-08 CN CNA2009100696337A patent/CN101591487A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102087073A (en) * | 2011-02-25 | 2011-06-08 | 丰城市环球资源再生科技发展有限公司 | De-painting kiln for pop can |
| CN102747375A (en) * | 2012-06-15 | 2012-10-24 | 兰州理工大学 | Paint remover for internal and external surface paint films of aluminum pop can and use method |
| CN104674273A (en) * | 2013-11-28 | 2015-06-03 | 沈阳黎明航空发动机(集团)有限责任公司 | High-temperature sealant removing agent and preparation method thereof |
| CN106929874A (en) * | 2017-01-06 | 2017-07-07 | 东台立讯精密电子技术有限公司 | Aluminium punching press diaphragm demoulding liquid medicine and method for demoulding |
| CN110016679A (en) * | 2019-04-14 | 2019-07-16 | 广州恒荣电子科技有限公司 | A kind of screen frame detergent for wiring board |
| CN110057194A (en) * | 2019-05-08 | 2019-07-26 | 衢州超越环保科技有限公司 | A kind of waste and old easy open can surface depainting process device |
| CN112143894A (en) * | 2019-06-28 | 2020-12-29 | 铜陵富翔铜再生循环利用有限公司 | Method for recovering copper from waste enameled wire |
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| PB01 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
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Open date: 20091202 |