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Recovery method of waste etching liquid

A recovery method and waste liquid technology, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve the problem that copper-containing waste etching liquid cannot be effectively recycled

Pending Publication Date: 2022-07-22
盛隆资源再生(无锡)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the problems existing in the prior art, the purpose of the present invention is to provide a recovery method of waste etching solution, to solve the problem that the current copper-containing waste etching solution cannot be effectively recovered

Method used

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  • Recovery method of waste etching liquid
  • Recovery method of waste etching liquid
  • Recovery method of waste etching liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The composition of the acid copper-containing etching waste liquid adopted in the embodiment is aluminum chloride, ammonium chloride, cupric chloride, phosphoric acid, aluminum 2000ppm, copper 80000ppm, total phosphorus 2000ppm, ammonium root 8000ppm, and the composition of the alkaline etching waste liquid is Ammonia water, ammonium chloride, copper chloride, ammonia nitrogen 120000ppm, copper 90000ppm.

[0036] The present embodiment provides a method for recycling waste etching solution, such as figure 1 As shown, the recovery method includes:

[0037]The acid copper-containing etching waste liquid, the alkaline etching waste liquid and the ammonia water are mixed and processed, and the solid phase and the cuproammonium solution are obtained through solid-liquid separation; the acid copper-containing etching waste liquid, the alkaline etching waste liquid and the ammonia water are obtained in the mixed treatment. The mass ratio of 1:0.7:1.3; the time of the mixing t...

Embodiment 2

[0041] The composition of the acid copper-containing etching waste liquid adopted in the embodiment is aluminum chloride, ammonium chloride, cupric chloride, phosphoric acid, aluminum 1000ppm, copper 100000ppm, total phosphorus 5000ppm, ammonium root 2400ppm, and the composition of the alkaline etching waste liquid is Ammonia, ammonium chloride, copper chloride, ammonia nitrogen 100000ppm, copper 86500ppm.

[0042] The present embodiment provides a method for recycling waste etching solution, the recycling method comprising:

[0043] The acid copper-containing etching waste liquid, the alkaline etching waste liquid and the ammonia water are mixed and processed, and the solid phase and the cuproammonium solution are obtained through solid-liquid separation; the acid copper-containing etching waste liquid, the alkaline etching waste liquid and the ammonia water are obtained in the mixed treatment. The mass ratio of 1:0.5:1.5; the time of the mixing treatment is 30min;

[0044] ...

Embodiment 3

[0047] Aluminum chloride, ammonium chloride, cupric chloride, phosphoric acid, aluminum 3394ppm, copper 102392ppm, total phosphorus 3432ppm, ammonium root 3429ppm of the acid copper-containing etching waste liquid adopted in the embodiment, the composition of the alkaline etching waste liquid is ammoniacal liquor, Ammonium chloride, copper chloride, ammonia nitrogen 95085ppm, copper 8764ppm.

[0048] The present embodiment provides a method for recycling waste etching solution, the recycling method comprising:

[0049] The acid copper-containing etching waste liquid, the alkaline etching waste liquid and the ammonia water are mixed and processed, and the solid phase and the cuproammonium solution are obtained through solid-liquid separation; the acid copper-containing etching waste liquid, the alkaline etching waste liquid and the ammonia water are obtained in the mixed treatment. The mass ratio of 1:0.8:1.2; the time of the mixing treatment is 45min;

[0050] The obtained cu...

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Abstract

The invention relates to a waste etching liquid recovery method, which comprises: mixing an acidic copper-containing waste etching liquid, an alkaline waste etching liquid and ammonia water, and carrying out solid-liquid separation to obtain a solid phase and a copper ammonium solution; sequentially carrying out alkali treatment and deamination on the obtained copper ammonium solution, and then carrying out solid-liquid separation to obtain a sodium chloride solution and copper oxide. Effective recovery of the etching waste liquid generated in the copper etching process is realized by adopting a specific recovery process. According to the method, the valuable resources of the waste liquid are recycled, environmental protection is facilitated, sustainable utilization of the resources is achieved, no new waste is generated in the process, and a closed loop of the whole recycling process is achieved.

Description

technical field [0001] The invention relates to the field of secondary utilization of resources, in particular to a method for recycling waste etching solution. Background technique [0002] At present, the PCB board usually needs to be processed by etching technology in the manufacturing process in order to achieve the purpose of further use. [0003] For example, CN110191589A discloses a double-sided etching method applied to a flexible circuit board. The flexible circuit board sample is etched synchronously on both sides with the thin copper side up and the thick copper side down. By adjusting the transmission speed, the thin copper spray pressure and the thick copper spray pressure Etch each flexible circuit board template until the etching conditions are met. The standard board of the circuit board is etched by synchronous etching of the thin copper surface and the thick copper surface. By simulating the etching environment of the flexible circuit board, the transmissi...

Claims

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Application Information

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IPC IPC(8): C01G3/02C01D3/04C01B25/36C23F1/46C22B7/00C22B15/00C22B21/00
CPCC01G3/02C01D3/04C01B25/36C23F1/46C22B7/006C22B15/0089C22B21/0023C01P2006/80Y02P10/20
Inventor 郎超
Owner 盛隆资源再生(无锡)有限公司
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