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

[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...

[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.

[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.