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Stabilizer for alkaline etching regenerated electrolytic copper and electrolyte solution

A technology of stabilizer and electrolytic copper, which is applied in the direction of improving process efficiency, photographic technology, instruments, etc., can solve problems such as fragility, copper product phase difference, and affect the price, so as to achieve the effect of improving stability and improving copper product phase

Inactive Publication Date: 2019-03-12
SHENZHEN QIXIN TIANZHENG ENVIRONMENTAL PROTECTIONTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the treatment method of etching waste liquid recovers the copper in the etching waste liquid, and at the same time recovers other components except copper, but the copper product produced in the process of electrolytic copper extraction is poor, and the copper deposition is not dense enough. As a result, it is fragile. At the same time, a large amount of blue copper crystals are carried on the outside of the copper, which seriously affects its selling price. Therefore, it has not yet met the customer's requirements in terms of resource utilization and profit maximization.

Method used

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  • Stabilizer for alkaline etching regenerated electrolytic copper and electrolyte solution

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Effect test

Embodiment 1

[0035] In this embodiment, the content (concentration) of each component of the electrolyte in the electrolytic tank in the alkaline etching electrolytic recovery system is as follows: the content of chloride ions is 176 g / L, the concentration of copper ions is 22.5 g / L, and the pH of the electrolyte is 8.9.

[0036] Add 0.1% ammonium chloride containing the stabilizer to the electrolytic solution, which contains 0.02% stabilizer. The contents of each component of the stabilizer are shown in Table 1. After circulating for half an hour, electrolytic copper is carried out according to the following method operate.

[0037] Turn on the electrolysis equipment, set the current of the rectifier to 1000A for electrolysis, control the temperature of the electrolysis tank at 35°C, increase the current by 200A / h after 4 hours of electrolysis, and stop increasing the current after it reaches 1800A. During this period, adjust the flowmeter to control the alkali The replenishment amount of...

Embodiment 2

[0039] In this embodiment, the content (concentration) of each component of the electrolyte in the electrolytic tank in the alkaline etching electrolytic recovery system is as follows: the content of chloride ions is 176 g / L, the concentration of copper ions is 22.5 g / L, and the pH of the electrolyte is 8.9.

[0040] In this electrolytic solution, adding mass percent is the ammonium chloride that contains this stabilizer of 0.1%, wherein contains 0.02% stabilizer, and the content of each component of stabilizer is shown in Table 1, circulates after half an hour according to the method in embodiment 1 Method for electrolytic copper operation. And the phase observation results of the single copper layer obtained in this embodiment are recorded in Table 1.

Embodiment 3

[0042] In this embodiment, the content (concentration) of each component of the electrolyte in the electrolytic tank in the alkaline etching electrolytic recovery system is as follows: the content of chloride ions is 176 g / L, the concentration of copper ions is 22.5 g / L, and the pH of the electrolyte is 8.9.

[0043] In this electrolytic solution, adding mass percent is the ammonium chloride that contains this stabilizer of 0.1%, wherein contains 0.02% stabilizer, and the content of each component of stabilizer is shown in Table 1, circulates after half an hour according to the method in embodiment 1 Method for electrolytic copper operation. And the phase observation results of the single copper layer obtained in this embodiment are recorded in Table 1.

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Abstract

The invention discloses a stabilizer for alkaline etching regenerated electrolytic copper and an electrolyte solution using the stabilizer. The stabilizer for the alkaline etching regenerated electrolytic copper contains, by mass, 0.002-0.05 part of a complexing agent, 0.001-0.02 part of a brightener, 0.001-0.03 part of a leveling agent and 0.001-0.01 part of a surface treatment agent. By means ofthe technical scheme, the copper phase extracted by electrolysis can be improved.

Description

technical field [0001] The invention relates to the technical field of production waste treatment in the manufacture of printed circuits, in particular to a stabilizer for alkaline etching regenerated electrolytic copper and an electrolytic solution using the stabilizer. Background technique [0002] Film removal-alkaline etching-tin stripping (SES) process is the most commonly used method for making outer layer circuits in the production of printed circuit boards. Among them, alkaline etching is an essential key process, and alkaline etching refers to the use of alkaline etching The liquid dissolves and etches away the copper other than the line protection layer on the workpiece. During the etching process, when the concentration of copper ions in the etching liquid reaches saturation, the etching liquid loses its etching ability and forms an etching waste liquid. [0003] At present, the treatment method of etching waste liquid recovers the copper in the etching waste liqu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C1/12C23F1/46
CPCC23F1/46C25C1/12Y02P10/20
Inventor 李再强黄文涛
Owner SHENZHEN QIXIN TIANZHENG ENVIRONMENTAL PROTECTIONTECH
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