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Electro-catalysis method for disposing waste brown liquid

A technology of browning liquid and electrocatalysis, which is applied in chemical instruments and methods, water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problem that cationic polymers and surfactants cannot be recycled and the copper recovery rate Low production cost and waste of production cost, to achieve the effect of improving oxidative degradation ability, improving recovery rate and reducing cost

Active Publication Date: 2013-06-12
VICTORY GIANT TECH HUIZHOU CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these two methods realize the recovery of copper in the waste browning solution by treating the organic matter in the waste browning solution first, in the actual treatment process, the copper recovery rate is low, and the copper added to the waste browning solution Cationic polymers and surfactants cannot be recycled, wasting a lot of production costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Prepare the electrolytic cell: the anode of the electrolytic cell is a titanium base covered with ruthenium oxide, the cathode of the electrolytic cell is a copper sheet, and the distance between the two electrodes is set to be 10 cm.

[0043] At room temperature, add 0.02g of cerium sulfate to 500mL of waste browning solution (the copper ion concentration is 29.3g / L), stir for 5 minutes to make it uniform, and then pass it into the upper electrolytic cell. Under a constant voltage of 8V, the current density 453A / m 2 , continuous electrolysis for 5 hours, when the solution turns light red, the concentration of copper ions in the measured waste liquid is less than 1g / L at this time, and the electrolysis is stopped. Add 10mL of P204 extractant to the electrolytic residual solution for extraction, then back-extract with 10mL of sulfuric acid solution with a concentration of 2mol / L, and the water phase after back-extraction is for use.

[0044] In this embodiment, a total ...

Embodiment 2

[0046] Prepare the electrolytic cell: the anode of the electrolytic cell is a titanium base covered with ruthenium oxide, the cathode of the electrolytic cell is a copper sheet, and the distance between the two electrodes is set to be 10 cm.

[0047] At room temperature, add 0.02g of cerium sulfate to 500mL of waste browning solution (the copper ion concentration is 41.7g / L), stir for 5 minutes to make it uniform, and then pass it into the upper electrolytic cell. Under a constant voltage of 8V, the current density 453A / m 2 , continue electrolysis for 5 hours, when the solution turns light red, the copper ion concentration in the waste liquid is measured to be less than 1g / L at this time, and the electrolysis is stopped. Obtain 14.35g copper, and the recovery rate of copper ion is 97.8%.

[0048] Add 10mL of P204 extractant to the electrolytic residual solution for extraction, then back-extract with 10mL of sulfuric acid solution with a concentration of 2mol / L, and the water ...

Embodiment 3

[0050] Prepare the electrolytic cell: the anode of the electrolytic cell is a titanium base covered with ruthenium oxide, the cathode of the electrolytic cell is a copper sheet, and the distance between the two electrodes is set to be 10 cm.

[0051] At room temperature, add 0.05gMn 2 (SO 4 ) 3 , after stirring for 5 minutes to make it even, pass it into the upper electrolytic cell, under the constant voltage of 9V, the current density is 480A / m 2 , continue electrolysis for 5.5 hours, when the solution turns light red, stop electrolysis.

[0052] Add 10mL of P204 extractant to the electrolytic residual solution for extraction, then back-extract with 10mL of sulfuric acid solution with a concentration of 2mol / L, and the water phase after back-extraction is for use.

[0053] In this embodiment, a total of 20.53 g of copper was recovered at the electrolytic cathode, and the recovery rate of copper was 98.5%.

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Abstract

The invention discloses an electro-catalysis method for disposing waste brown liquid. The electro-catalysis method for disposing the waste brown liquid comprises the following steps: a variable-valence metal ion catalyst is added into the waste brown liquid and evenly stirred, the mixture is electrolyzed under a high oxygen evolution overpotential positive pole and a low copper evolution overpotential negative pole, and at the same time copper ions in an electrolyte are monitored in real time. When the concentration of the copper ions in the electrolyte is small than 1g / L, the electrolysis is stopped. The variable-valence metal ion catalyst is high in valence and strong in oxidation capacity. After the electrolysis is finished, by means of the operation of extraction and back extraction, the recycling of a positive ion type catalyst is achieved. According to the electro-catalysis method for disposing the waste brown liquid, the variable-valence metal ion catalyst is adopted to electrolyze the waste brown liquid, coppery organic complexes in the waste brown liquid can be effectively degraded, the coppery organic complexes in the waste brown liquid are enabled to release free copper ions, the free copper ions deposit at the negative pole, the recovery rate of copper in the waste brown liquid is improved, the catalyst can be recycle through extraction, and the cost is reduced effectively.

Description

technical field [0001] The invention relates to the technical field of browning treatment of printed circuit boards, in particular to the treatment of waste browning liquid, and in particular to an electrocatalytic method for treating waste browning liquid. Background technique [0002] Waste browning solution comes from the browning treatment process of printed circuit boards and is a product of browning solution failure. In order to meet the increasingly lightweight and portable needs of electrical equipment, printed circuit boards are developing towards refined and integrated multilayer circuit boards. In the lamination process of multilayer circuit boards, it is necessary to perform browning processing on the inner core boards in the multilayer circuit board in advance to improve the bonding force between the inner core boards. [0003] At present, during the browning treatment in this industry, the surface of the copper foil of the inner core board is micro-etched with...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461C25C1/12
CPCY02P10/20
Inventor 潘湛昌范红罗俊明胡光辉肖楚民魏志钢张晃初曾祥福
Owner VICTORY GIANT TECH HUIZHOU CO LTD
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