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Composite antioxidant applied to copper powder

A composite antioxidant and copper powder technology, which is applied in the fields of chemical industry and metallurgy, can solve the problems of complex production process and increased production cost, and achieve the effects of preventing oxidation, improving activity, and improving anti-oxidation protection performance

Inactive Publication Date: 2012-06-27
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, the production process is complicated and the production cost increases

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Take the cathode copper as the anode and the pure copper plate as the cathode. Under the action of direct current, 500g of the copper powder obtained by electrolysis is first washed with deionized water until the pH is 1 to 3, and then the composite antioxidant is added. The composition of the composite antioxidant is as follows: The weight percentage of deionized water is: 0.2% benzotriazole, 0.2% sodium soap, 2% ethanol; stir for 5-15 minutes, fully mix, make the copper powder and anti-oxidant in good contact, and then let stand for 5-15 minutes. After anti-oxidation treatment, wash with deionized water until there is no SO 4 2- (with BaCl 2 Tested, to no BaSO 4 A white precipitate is formed), filtered under normal pressure or reduced pressure, and vacuum-dried at 80-100°C. The product is dark red, rose red, brown red powder, and the chemical composition of the product is pure copper powder.

[0021] Use the hydrogen loss method to detect the oxygen content, that ...

Embodiment 2

[0023] Take the cathode copper as the anode and the pure copper plate as the cathode. Under the action of direct current, 500g of the copper powder obtained by electrolysis is washed with reverse osmosis water until the pH is 1 to 3, and then the composite antioxidant is added. The composition of the composite antioxidant is as follows: The weight percent of reverse osmosis water is: 0.6% benzotriazole, 0.6% sodium soap, 6% ethanol; stir for 5-15 minutes, fully mix, make the copper powder and anti-oxidant in good contact, and then let stand for 5-15 minutes. After anti-oxidation treatment, wash with deionized water until there is no SO 4 2- (with BaCl 2 Tested, to no BaSO 4 A white precipitate is formed), filtered under normal pressure or reduced pressure, and vacuum-dried at 80-100°C. The product is dark red, rose red, brown red powder, and the chemical composition of the product is pure copper powder.

[0024] The oxygen content is detected by the hydrogen loss method, t...

Embodiment 3

[0026] Take the cathode copper as the anode and the pure copper plate as the cathode. Under the action of direct current, 500g of the copper powder obtained by electrolysis is first washed with deionized water until the pH is 1 to 3, and then the composite antioxidant is added. The composition of the composite antioxidant is as follows: The weight percent of deionized water is: 1% benzotriazole, 1% sodium soap, 10% ethanol; stir for 5-15 minutes, fully mix, make the copper powder and anti-oxidant in good contact, and then let stand for 5-15 minutes. After anti-oxidation treatment, wash with deionized water until there is no SO 4 2- (with BaCl 2 Tested, to no BaSO 4 A white precipitate is formed), filtered under normal pressure or reduced pressure, and vacuum-dried at 80-100°C. The product is dark red, rose red, brown red powder, and the chemical composition of the product is pure copper powder.

[0027] The oxygen content is detected by the hydrogen loss method, that is, a...

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Abstract

The invention relates to a composite antioxidant applied to copper powder, comprising the following components: benzotriazole, hard soap, ethanol and balance of pure water. Electrolytic copper powder is washed until pH value thereof is 1.0-3.0, adding the components to detergent, thus forming a layer of organic antioxidation protective film on the surface of copper powder, contact between the surface of the copper powder and oxygen in the water is cut off to prevent the copper powder from being oxidized in the follow-up washing process. Oxygen content of the copper powder in the invention reaches national standards; in addition, reduction process after washing the electrolytic copper powder, thus greatly saving product cost and lowering energy consumption. The components of the invention features reasonable proportioning, convenient use and can effectively copper powder oxidation resistance, save energy and simplify electrolytic copper powder production technology, reduce production cost and realize industrialized production, thus being suitable for industrialized application and enjoying fine industrialization prospect; in addition the composite antioxidant can not only serve as antioxidation protective agent in the process of producing electrolytic copper powder but also as the antioxidation protective agent in the process of storing copper powder produced by other means.

Description

technical field [0001] The invention discloses a composite antioxidant for copper powder, which belongs to the technical fields of chemical industry and metallurgy. Background technique [0002] Copper powder is an important raw material, widely used in metallurgy, chemical industry, materials, light industry, electronics, national defense, nuclear technology, aerospace and other fields. [0003] The production methods of copper powder mainly include electrolytic method, atomization method and chemical method. The atomization method is to melt copper or copper alloy and then blow it into copper powder. The appearance of copper powder produced by this method is irregular spherical. It is easy to oxidize during the injection process, and the powder particles are relatively thick. The advantage is that it can produce copper alloy powder. [0004] The chemical method is to use a reducing agent to convert Cu in aqueous solution 2+ Reduction to copper powder or copper alloy pow...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C22/52B22F1/00C25C5/00
Inventor 何家成
Owner CENT SOUTH UNIV
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