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Waste ring-pull can surface paint remover and preparation method and application thereof

A technology of pop-top cans and paint remover, which is applied in the field of paint removal and can solve the problems of cumbersome treatment process and high energy consumption

Active Publication Date: 2017-05-31
CHANGZHOU XIAOGUO INFORMATION SERVICES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the secondary pollution to the environment during the paint stripping process is reduced, the treatment process is cumbersome and the energy consumption is large

Method used

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  • Waste ring-pull can surface paint remover and preparation method and application thereof
  • Waste ring-pull can surface paint remover and preparation method and application thereof
  • Waste ring-pull can surface paint remover and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] figure 1 For different sulfuric acid (H 2 SO 4 ) concentration of paint remover after paint removal, the weight loss diagram of the specimen shows that the corrosion weight loss is the largest when the sulfuric acid concentration is 70ml, and the corrosion weight loss is the smallest when the sulfuric acid concentration is 90ml. The order of corrosion weight loss is: 70ml>100ml>60ml>80ml>30ml> 10ml>40ml>20ml>50ml>90ml.

[0030] The comparison shows that concentrated sulfuric acid with a concentration of 70ml / L has the best paint removal effect, the paint removal temperature is normal temperature, and the paint removal time is 10 minutes.

Embodiment 2

[0032] figure 2 The curve of time and corrosion weight loss shows that 2g / L surfactant is added in the concentrated sulfuric acid solution of 70ml / L. The corrosion weight loss is the largest at 10 minutes, followed by 46 minutes, and finally concentrated around 16 minutes to 25 minutes. It can be seen from Table 1 that the surfactant added when the corrosion weight loss is the largest is nonylphenol polyoxyethylene (NP-10).

[0033] Table 1 adds the composition, weight loss and paint removal result of each paint remover formulation of surfactant

[0034]

[0035] The comparison shows that the concentrated sulfuric acid with NP-10 has the best paint removal effect.

Embodiment 3

[0037] image 3 The curve of time and corrosion weight loss shows that 2g / L additive is added in 70ml / L concentrated sulfuric acid solution. It can be seen from the curve in the figure that the corrosion weight loss is the largest at 17 minutes, followed by 18 minutes, 7 minutes, and 15 minutes, and finally concentrated around 8 minutes to 15 minutes, and 19 minutes to 25 minutes. In conjunction with Table 2, it can be seen that the additive added when the corrosion weight loss was the largest was sodium lauryl sulfate, and what was added in 7min was linear alkylbenzene sulfonate sodium (LAS), what was added in 18min was hexamethylenetetramine, and in 15min Trisodium citrate was added.

[0038] Table 2 Adds the composition, weight loss and paint removal results of each paint remover formulation with additives

[0039]

[0040] Taking economic and environmental factors into account, adding 2g / L of LAS, the paint remover has the best effect on removing the surface paint.

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Abstract

The invention relates to a waste ring-pull can surface paint remover and a preparation method and application thereof, and belongs to the technical field of paint removing. The paint remover is formed by taking sulfuric acid as a base solution and then compounding with other inorganic acids, a surfactant and an additive, wherein other inorganic acids include phytic acid and phosphoric acid; the surfactant is one of fluorocarbon, fatty alcohol-polyoxyethylene ether and nonylphenol polyoxyethylene ether; and the additive is one of lauryl sodium sulfate, sodium n-alkyl benzene sulfonate and triethanolamine. Compared with other organic waste pull-ring can paint removers, the paint remover disclosed by the invention has the advantages of being low in toxicity, low in volatilization, little in environment influence, and safe in use.

Description

technical field [0001] The invention relates to a paint remover for the surface of waste pop cans, a preparation method and application thereof, and belongs to the technical field of paint removal. Background technique [0002] The waste paint layer on the surface of waste cans has an impact on the quality of recycled aluminum. In the pretreatment, the most difficult problem to solve is the paint layer treatment problem. High-temperature paint removal will produce a lot of smoke, and the recycling process is prone to pollution. In order to remake waste cans into high-quality aluminum or aluminum alloy materials, strict pretreatment must be carried out. In addition to cleaning the dirt on the surface, the most important thing is the treatment of the paint layer on the surface of the can body. Paint removal is the core technology for the recycling of waste cans. Its main advantages are high recycling production efficiency, low energy consumption, small burning loss, and easy ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D9/04
CPCC09D9/04
Inventor 李树白姚培刘英莉马迪孙毓韬刘媛张启蒙周熙雯史军涛
Owner CHANGZHOU XIAOGUO INFORMATION SERVICES
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