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Method for preparing nanometer copper powder by recycling copper from etching liquid

A technology of nano-copper powder and copper recovery, which is applied in the direction of nanotechnology, can solve the problems of poor solution stability and uniformity, copper powder particle size, shape, and inability to achieve self-desorption, so as to achieve product shape and Easy particle size, low price, product shape and particle size control effect

Active Publication Date: 2021-04-09
江苏净源新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The solution prepared by this method is an emulsion, and the stability and uniformity of the solution are poor, resulting in different particle sizes and shapes of the prepared copper powder; and the copper powder is easily deposited on the cathode, and self-desorption cannot be achieved.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Embodiment 1 provides a kind of method utilizing etching solution to recover copper to prepare nano-copper powder, it is characterized in that, comprises the steps:

[0050] Step S1, waste etching solution extraction: add the collected waste etching solution into the extraction tank, add the extractant for extraction; continue to add the extractant for extraction, repeat the above operation until the concentration of copper ions in the waste etching solution after extraction is less than 0.1 g / L;

[0051] Step S2, stripping: separating the copper-rich extractant extracted in step S1 from the waste etching solution by filtration, rinsing it with water, inputting it into the stripping tank, adding the stripping agent, adjusting the pH to alkaline, and obtaining the copper source ;

[0052] Step S3, preparation of microemulsion: After mixing the copper source prepared in step S2, anionic hyperbranched surfactant, auxiliary agent, and emulsifier evenly, ultrasonically disp...

Embodiment 2

[0065] Embodiment 2 provides a kind of method that utilizes etching solution to recover copper to prepare nano-copper powder, and it is basically the same as embodiment 1, and difference is, the copper source described in step S3, anionic hyperbranched surfactant, auxiliary agent, emulsifying The mass ratio of agent is 45:2.5:7:1.5; Described adjuvant comprises the following components by weight: 2.5 parts of hyperbranched polyethyleneimine fourth generation, 1.5 parts of sodium lignosulfonate, hydroxyurea 3.5 parts, 1.5 parts lysine, 2.2 parts adenosine, 1.5 parts biguanide.

Embodiment 3

[0067] Embodiment 3 provides a kind of method that utilizes etching solution to recover copper to prepare nano-copper powder, and it is basically the same as embodiment 1, and difference is, the copper source described in step S3, anionic hyperbranched surfactant, auxiliary agent, emulsifying The mass ratio of agent is 50:4:8:2; Described adjuvant comprises the following components by weight: 3 parts of the fourth generation of hyperbranched polyethyleneimine, 2 parts of sodium lignosulfonate, hydroxyurea 4 parts, 2 parts of lysine, 2.5 parts of adenosine, 2 parts of biguanide.

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PUM

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Abstract

The invention discloses a method for preparing nanometer copper powder by recycling copper from etching liquid. The method is characterized by comprising the following steps of: step 1. extracting waste etching liquid; step 2. carrying out back extraction; step 3. preparing microemulsion; step 4. carrying out electro-deposition; step 5. collecting the nanometer copper powder; and step 6. drying and packaging. The invention also provides the nanometer copper powder prepared by the method. According to the method for preparing the nanometer copper powder by recycling the copper from the etching liquid, raw materials are wide in source and low in price, the process is short, and the equipment investment is low; and the product has the advantages of controllable morphology and particle size, high purity, high surface activity, a large specific surface area and good dispersity, and is suitable for continuous large-scale production.

Description

technical field [0001] The invention relates to the technical field of recycling nonferrous metals, in particular to a method for preparing nanometer copper powder by recovering copper from an etching solution. Background technique [0002] Nano-copper powder has the characteristics of size effect, surface effect and macroscopic quantum tunneling effect. Because of its unique physical and chemical properties, it is widely used in powder metallurgy parts, advanced lubricating oil additives, catalysts and electronic pastes. At the same time, because copper is a base metal, the price is relatively low compared with gold, silver and other precious metals, so the development of nano-copper powder has important theoretical significance and practical application value. [0003] With the development of the PCB industry, the impedance requirements of various wires are getting higher and higher, which inevitably requires stricter control of the width of the wires. However, no matter w...

Claims

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Application Information

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IPC IPC(8): C25C5/02C23F1/46B82Y40/00
CPCC25C5/02C23F1/46B82Y40/00
Inventor 彭璟雷仁华周爱成徐天虹华勇
Owner 江苏净源新材料有限公司
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