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Electrolyzer device, system and application of acid etching solution circulation regeneration

An electrolytic cell, acid technology, applied in the direction of electrolysis components, electrolysis process, electrodes, etc., can solve the problems of uncertain parameters of the device, easy to escape chlorine gas, the device cannot be automated, etc. Effect

Active Publication Date: 2019-06-18
SHENZHEN JECH TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide an acidic etching liquid circulation system for the existing acidic etching waste liquid in the process of recovering metal copper and recycling the acidic etching liquid. Regenerated electrolyser unit

Method used

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  • Electrolyzer device, system and application of acid etching solution circulation regeneration
  • Electrolyzer device, system and application of acid etching solution circulation regeneration
  • Electrolyzer device, system and application of acid etching solution circulation regeneration

Examples

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Effect test

Embodiment 1

[0047] An electrolytic cell device for circulating and regenerating acidic etching solution, comprising an electrolytic cell, one main anode, two partial anodes, two diaphragms and two cathodes, the specific structure is as attached to the specification figure 1 shown. Among them, the main anode is composed of a titanium substrate coated with oxides of molybdenum and manganese on the surface, and the cathode is a pure titanium plate.

[0048] Use 3% weight concentration of NaCl solution as the electrolyte, connect the direct current, and set the anode current density to 600A / m 2 , electrolysis is carried out at room temperature, and the oxygen evolution efficiency of the anode is determined to be greater than 99%. The actual operation of the device was inspected for half a year. After 4500 hours of operation, the oxygen evolution efficiency of the anode is still greater than 48%, which shows that the precipitation of chlorine can be significantly inhibited in the chloride aqu...

Embodiment 2

[0050] The electrolyzer device of embodiment 2, except that main anode is made of the titanium substrate that the oxide of ruthenium, iridium, manganese is coated on the surface, other parts are identical with embodiment 1.

[0051] Use 3% weight concentration of NaCl solution as electrolyte, connect direct current, and set the anode current density to 1300A / m 2 , electrolysis is carried out at room temperature, and the electrolytic efficiency of chlorine evolution at the anode is measured to be greater than 68%, and the electrolytic efficiency of oxygen evolution is 32%. After one year's actual operation of the device, the anode oxygen evolution efficiency increased to 39%, indicating that in the chloride aqueous electrolyte system, the precipitation of chlorine can be significantly inhibited.

Embodiment 3

[0053] An electrolytic cell device for circulating and regenerating acidic etching solution, comprising an electrolytic cell, one main anode, two partial anodes, two diaphragms and two cathodes, the specific structure is as attached to the specification figure 1 shown. Among them, the main anode is composed of a titanium substrate coated with oxides of molybdenum and manganese on the surface, and the cathode is a pure titanium plate.

[0054] exist figure 1 In the electrolytic bath, PCB is electrolyzed to produce etching solution after etching copper. The concentration of free HCl in the etching solution is determined to be 2mol / L, the content of copper ions is 145g / L-105g / L, among which the content of monovalent copper ions is about 40-45g / L, and the anode current density is 400A / m 2 , the cathode current density is adjusted by changing the conductive area of ​​the cathode. Cathode current density is 200~450A / m 2 Between, within the variation range of the cathode current ...

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Abstract

The invention belongs to the technical field of etching liquid treatment, and particularly discloses an electrolytic cell device and system for cyclic regeneration of acid etching liquid and application. The device comprises an electrolytic cell, and further comprises a main anode, a cathode, a diaphragm and at least one partial anode; the diaphragm divides a cavity formed by the electrolytic cell into an anode chamber and a cathode chamber; the main anode is arranged inside the anode chamber; the cathode is arranged inside the cathode chamber; the partial anodes are arranged inside the anode chamber; and every two of the main anode, the cathode, the partial anodes and the diaphragm are parallel and spaced mutually. By the utilization of the three-dimensional combined structure of the main anode and the partial anodes, when a direct current power source is connected in the electrolytic cell, the function of effectively restraining chlorine precipitation is achieved. The system formed by the device not only is environmentally friendly, but also can well recycle electrolytic copper and cyclically regenerate the etching liquid, non-pollution emission of the recycling process is achieved, and economic benefits and multiple benefits of reuse of resources are both achieved.

Description

technical field [0001] The invention relates to the field of etching solution treatment technology, in particular to an electrolytic cell device, system and application for recycling and regenerating acidic etching solution. Background technique [0002] In industrial production, especially PCB production, acid etching is a common etching method. Acid etching mainly uses the acid chloride etching solution system to etch the copper on the copper clad laminate, and at the same time uses the cyclic electrolysis technology to electrodeposit the copper in the etching solution after copper etching, so as to ensure the equilibrium concentration of the copper content in the etching solution and restore Various technical parameters of its copper etching, such as the concentration of divalent copper ions, acidity, redox potential, etc., enable the electrochemically regenerated etching solution to return to the PCB production line for copper etching operations to achieve the purpose of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25C1/12C25C7/02C23F1/46
CPCC23F1/46
Inventor 李建光李海涛卢江锋蓝浩明朱莎刘晓群
Owner SHENZHEN JECH TECH