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Light/ozone-electricity-adsorption reaction device and method for extracting copper by degrading browning waste liquor

An adsorption reaction and electrolysis device technology, applied in the field of light/ozone-electricity-adsorption multi-step synergistic reaction devices, can solve problems such as difficulty in breaking coordination bonds, and achieve the effects of simple manufacture, cost reduction, and low degradation cost

Active Publication Date: 2012-07-18
VICTORY GIANT TECH HUIZHOU CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, for the acidic browning waste liquid with strong film-forming ability and strong complexes, since the central ion in the complexes is in the middle of the complexes and surrounded by bulky molecular ligands, it is difficult to interact with photogenerated holes or those with Active · OH free radical contact, and it is difficult to break the coordination bond

Method used

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  • Light/ozone-electricity-adsorption reaction device and method for extracting copper by degrading browning waste liquor
  • Light/ozone-electricity-adsorption reaction device and method for extracting copper by degrading browning waste liquor
  • Light/ozone-electricity-adsorption reaction device and method for extracting copper by degrading browning waste liquor

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Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0037] Add 5g of titanium dioxide-supported catalyst, add 20g of manganese dioxide-supported catalyst, add 300ml of the original browning waste liquid (total Cu2+ concentration, 48.5g / L, COD value is about 50000) from (a) tube, and pass it into (b) OZ type ozone generator blows 3mg / L ozone, and treats it under an 8w ultraviolet lamp for 4h; then all of it is added to the electrolysis chamber, and at a constant current of 0.8A, adjust the cathode liquid junction area so that the current density is 4A / dm2, adjust The distance between the two poles is 3-8cm, so that the voltage is in the range of 3-5V, and the electrolysis is performed for 10 hours. After electrolysis, the solution is passed into the adsorption chamber for 2 hours. The COD value drops to 1208, the copper recovery rate reaches 57.3%, and the copper removal rate in the solution reaches 72.5% %, the current efficiency of electrolytic copper deposition is 53.7%. The electrolysis energy consumption per unit volume of ...

Embodiment approach 2

[0040] Add 500ml of the original browning waste liquid (total Cu2+ concentration is 48.5g / L, COD value is about 50000) to the light / ozone chamber treatment room after scheme 1, and treat it under 8w ultraviolet lamp and ozone concentration of 4mg / L 4h, under the constant current of 1A, adjust the cathode liquid junction area, make the current density 5A / dm2, and adjust the distance between the two electrodes to 3-8cm, make the voltage in the range window of 3-5V, carry out electrolysis for 10h, after electrolysis, the solution will be introduced into the adsorption After 2 hours of treatment in the chamber, the COD value dropped to 1349, the copper recovery rate reached 49.6%, the copper removal rate in the solution reached 65.3%, and the current efficiency of electrolytic copper deposition was 52.7%. The electrolysis energy consumption per unit volume of browning solution is 0.059KW·h / L, and the total energy consumed for degrading unit volume of browning waste solution is 0.63...

Embodiment approach 3

[0042] Add 500ml of the original browning waste liquid (total Cu2+ concentration is 40g / L, COD value is about 55000) to the light / ozone chamber treatment room after scheme 2, and treat it under 8w ultraviolet lamp and ozone concentration of 5mg / L for 4h , under a constant current of 1A, adjust the cathode liquid junction area to make the current density 3A / dm2, and adjust the distance between the two electrodes to 3-8cm, so that the voltage is in the range of 3-5V, perform electrolysis for 10h, and the solution after electrolysis is passed into the adsorption chamber After 2 hours of treatment, the COD value dropped to 2000, the copper recovery rate reached 52.3%, the copper removal rate in the solution reached 52.3%, and the electrolytic copper deposition current efficiency was 53.9%. The electrolysis energy consumption per unit volume (1L) of browning solution is 0.055KW·h, and the total energy consumed for degrading a unit volume (1L) of browning waste solution is 0.633KW·h....

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Abstract

The invention relates to a light / ozone-electricity-adsorption reaction device and method for extracting copper by degrading browning waste liquor. The device comprises a light / ozone synergistic decomposing device, an electrolysis device for degrading and recovering metal copper and an adsorption elution device. In the device, a photocatalyst and an oxygen catalyst are loaded on a porous activated carbon carrier with high specific surface area; under the synergistic effect of ultraviolet light and ozone, photo-generated electron pairs are prevented from compounding, long-time catalytic treatment activity is kept, a free radical.OH with strong oxidation activity is generated, organic matters in the browning waste liquor can be oxidized and degraded, and the complexing bond of the complex in the browning waste liquor can be broken; insoluble reticular titanium base material serves as an anode, a copper sheet material serves as a cathode, organic matters in the browning liquor is continuously degraded by electrolysis to generate a second-grade degrading product which is easy to adsorb, and valuable metal copper is recovered on the cathode; and finally, common activated carbon is used for adsorbing to effectively treat the browning waste liquor, so as to realize green and environment-friendly treatment of the browning waste liquor.

Description

technical field [0001] The invention relates to a light / ozone-electricity-adsorption multi-step synergistic reaction device, in particular to a light / ozone-electricity-adsorption reaction device for degrading organic matter in browning waste liquid and recovering valuable metal copper from browning waste liquid and processing methods. Background technique [0002] The browning waste liquid mainly comes from the printed circuit board (PCB) industry, which is produced by the browning solution in the browning treatment process of the printed circuit board (PCB). Since the European and American manufacturers introduced the browning process in the mid-to-late 1990s, brown oxidation technology has overcome the unavoidable shortcomings of black oxidation and gradually replaced black oxidation technology. With the development of the PCB industry, the demand for browning solution is increasing. According to statistics: at present, more than 90% of printed circuit board manufacturers...

Claims

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Application Information

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IPC IPC(8): C02F9/06C25C1/12
CPCY02P10/20Y02W10/37
Inventor 龚俊张晃初潘湛昌范红胡光辉肖楚民魏志钢
Owner VICTORY GIANT TECH HUIZHOU CO LTD
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