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Chemical oil removal liquid suitable for aluminum alloy by utilizing anode oxidation waste sulfuric acid and application of chemical oil removal liquid

A chemical degreasing, anodizing technology, applied in sulfur trioxide/sulfuric acid, inorganic chemistry, sulfur compounds, etc., can solve problems such as ecological environment hazards and waste

Inactive Publication Date: 2018-06-22
SHENYANG OUSHIDUN NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The direct discharge of a large amount of anodizing tank waste liquid will bring serious harm to the ecological environment
At the same time, the main component of the waste liquid is sulfuric acid, and it is a waste to dispose of it directly.

Method used

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  • Chemical oil removal liquid suitable for aluminum alloy by utilizing anode oxidation waste sulfuric acid and application of chemical oil removal liquid
  • Chemical oil removal liquid suitable for aluminum alloy by utilizing anode oxidation waste sulfuric acid and application of chemical oil removal liquid
  • Chemical oil removal liquid suitable for aluminum alloy by utilizing anode oxidation waste sulfuric acid and application of chemical oil removal liquid

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Experimental program
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Effect test

Embodiment 1

[0027] (1) Purification of sulfuric acid in the waste liquid of anodic oxidation tank

[0028] The main component of the electrolyte in the sulfuric acid anodic oxidation tank is sulfuric acid. During the sulfuric acid anodic oxidation process to treat the surface of the gas cylinder according to the conventional process, the sulfuric acid electrolyte is inevitably mixed with impurities during use, and some of the impurities will affect the resistance of the oxide film. Corrosion, brightness, hardness and conductivity of the bath. After detection, the main component of the waste liquid in the anodizing tank is sulfuric acid, and the main impurity metal ions are aluminum ions, copper ions and ferrous ions. The impurity metal ions mainly come from the dissolution of matrix metal during anodic oxidation. The impurity metal ions in the waste liquid of the anodizing tank For ordinary sulfuric acid anodization, the maximum allowable content of impurities is shown in Table 1.

[00...

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Abstract

The invention discloses a chemical oil removal liquid suitable for aluminum alloy by utilizing anode oxidation waste sulfuric acid and an application of the chemical oil removal liquid. The oil removal liquid is composed of sulfuric acid, an emulsifier, a nonionic surfactant, an anionic surfactant, a builder, an oxidizing agent and a corrosion inhibitor. According to the chemical oil removal liquid, the waste sulfuric acid solution of the anodic oxidation production line is fully utilized to prepare the oil removal liquid medicine, the reutilization of the anode oxidation waste acid is realized, and the cost for producing acid washing oil removal and anode oxidation is saved. The oil removal liquid is free of phosphorus, nitrogen and the like, the wastewater treatment is simple, the eutrophication of the water body can be avoided after the water is discharged, and the environment-friendly performance is good.

Description

technical field [0001] The invention relates to the technical field of degreasing, in particular to an aluminum alloy chemical degreasing process. Background technique [0002] At present, commonly used degreasing fluids include acidic and alkaline degreasing fluids, which are corrosive to the surface of aluminum materials and take a long time to degreasing. Existing alkaline degreasing fluid contains phosphate and nitrate, the COD value is high, and the wastewater treatment is difficult. If it is directly discharged, it will cause eutrophication of the water body. Acid degreasing currently uses nitric acid degreasing method, although the price is low, but "huanglong" (nitrogen oxides) is produced during degreasing, and the working environment is harsh. Therefore, it is urgently needed in this field to develop a kind of cheap, good degreasing effect, simple waste water treatment, and use environment-friendly degreasing agent. [0003] In the production line of gas cylinder...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23G1/06C23G1/12C01B17/90
CPCC23G1/065C01B17/901C23G1/125
Inventor 屠硕吴庆锋杨树军蔡立柱李志宏
Owner SHENYANG OUSHIDUN NEW MATERIAL TECH
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