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Preparation method of nano-copper powder

A nano-copper powder and nano-copper technology, applied in the electrolysis process, electrolysis components, electrolysis organic production and other directions, can solve the problems of immature production process and uneven powder particles, and achieve adjustable size, uniform particle distribution and low investment. Effect

Active Publication Date: 2012-07-18
安徽纳洛米特新材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the immature production process and uneven powder particles, there are still many process conditions to be solved for mass production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The first step, electrochemical reaction:

[0035] In the self-made special electrolytic cell, 1.2 kg of metal copper plate is used as the anode, the negative electrode material is glassy carbon, the electrolyte is environmentally friendly reagent industrial alcohol, the purity is 99.9% absolute alcohol 10 liters, add 500 g of tetraheptyl chloride Ammonium is used as a conductive agent, and 3 volts of direct current is passed between the positive and negative electrodes. After 24 hours, 5 kg of the precursor of nano-copper powder is obtained;

[0036] Cu-1e+R→R-Cu; Cu-2e+2R→R 2 -Cu, wherein R is an organic alcohol, R-Cu; R 2 -Cu is the precursor for the combination of copper ions and organic alcohols.

[0037] The second step, thermal reduction treatment:

[0038] Put the precursor of 5 kg of nano-copper powder obtained in the first step into a 10-liter autoclave, and add 5 liters of alcohol. Heat to 200 degrees Celsius for 2 hours. Naturally cool to room temperatu...

Embodiment 2

[0045] The first step, electrochemical reaction:

[0046] In the self-made special electrolytic cell, 5.5 kg of metal copper plate is used as the anode, the negative electrode material is glassy carbon, the electrolyte is environment-friendly reagent industrial alcohol, the purity is 99.9% absolute alcohol 50 liters, add 2000 grams of tetraheptyl chloride Ammonium is used as a conductive agent, and 3 volts of direct current is passed between the positive and negative electrodes. After 24 hours, 25 kg of the precursor of nano-copper powder is obtained;

[0047] Cu-1e+R→R-Cu; Cu-2e+2R→R 2 -Cu, wherein R is an organic alcohol, R-Cu; R 2 -Cu is the precursor for the combination of copper ions and organic alcohols.

[0048] The second step, thermal reduction treatment:

[0049] Put the precursor of 25 kg of nano-copper powder obtained in the first step into a 50-liter autoclave, add 15 liters of alcohol, heat to 200 degrees Celsius for 2 hours, and naturally cool to room tempera...

Embodiment 3

[0056] The first step, electrochemical reaction:

[0057] In the self-made special electrolytic cell, 16 kg of metal copper plate is used as the anode, the negative electrode material is glassy carbon, the electrolyte is environmentally friendly reagent industrial alcohol, the purity is 99.9% absolute alcohol 100 liters, add 3000 grams of tetraheptyl chloride Ammonium is used as a conductive agent, and 3 volts of direct current is passed between the positive and negative electrodes. After 24 hours, 75 kg of the precursor of nano-copper powder is obtained;

[0058] Cu-1e+R→R-Cu; Cu-2e+2R→R 2 -Cu, wherein R is an organic alcohol, R-Cu; R 2 -Cu is the precursor for the combination of copper ions and organic alcohols.

[0059] The second step, thermal reduction treatment:

[0060] Put the precursor of 75 kg of nano-copper powder obtained in the first step into a 100-liter autoclave, add 50 liters of alcohol, heat to 200 degrees Celsius for 2 hours, and naturally cool to room te...

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Abstract

The invention discloses a preparation method of nano-copper powder, which comprises the following steps of: in a self-made special electrolytic cell, taking metal copper as an anode, taking conducting material as a cathode, taking electrolyte as organic alcohol, taking ammonium salt which is soluble in the electrolyte as electrolyte, forbidding the ammonium salt to participate chemical reaction, and combining the cathode copper with the organic alcohol, so that the precursor of the nano-copper can be generated; mixing the precursor of the nano-copper, the organic alcohol or the other saturated hydrocarbon with the unsaturated hydrocarbon liquid, and sealing the precursor of the mixed nano-copper in a high-pressure kettle to be subjected to reductive treatment, so that the nano-copper powder can be obtained; and separating the nano-copper powder from the mixture of the reduced nano-copper powder and the organic solvent by an industrial centrifugal machine device, and washing with industrial alcohol, so that wet nano-copper powder can be obtained, putting the nano-copper powder into a vacuum drying oven, and treating, so that the nano-copper powder which accords with the national standard can be obtained. The preparation method has the advantages of being free of pollution in reaction process, small in investment, low in cost, good in product dispersibility, even in distribution, and capable of realizing different-quantity production.

Description

technical field [0001] The invention relates to a preparation method of nanometer copper powder, which can be used for civil or military purposes, and belongs to the technical field of nanometer material preparation. Background technique [0002] The industrial production process of nano-copper powder belongs to the high-tech in the field of nano-material preparation. At present, the methods of producing nano-copper powder at home and abroad mainly include: [0003] Method 1, high-temperature heating evaporation method: heat and volatilize metal copper in high-temperature and vacuum equipment, and use nitrogen or inert gas to bring metal vapor into a low-temperature collection chamber for collection. This method has been used in industrial production at present, and its advantages are Different nano-metal materials can be produced with high product purity. The disadvantages are that the dispersion of the product is not good, the investment in equipment is large, the process...

Claims

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Application Information

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IPC IPC(8): C25B3/12B22F9/20C25B3/13
Inventor 李小毛
Owner 安徽纳洛米特新材料科技股份有限公司
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