Treatment technology of browned waste liquid produced by PCB (Printed Circuit Board)

A PCB circuit board and processing technology technology, which is applied to the processing technology field of browning waste liquid produced by printed PCB circuit boards, can solve the problems of low copper recovery rate, unsatisfactory effect of electrolytic browning waste liquid, insufficient energy saving and environmental protection, etc. , to achieve the effect of reducing pollutant indicators, good application prospects and convenient operation

Inactive Publication Date: 2018-07-06
WUXI SHENNAN CIRCUITS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the unsatisfactory effect of the existing electrolytic browning waste liquid, the problems of low copper recovery rate, complicated operation, high energy consumption, and insufficient energy saving and environmental protection

Method used

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  • Treatment technology of browned waste liquid produced by PCB (Printed Circuit Board)
  • Treatment technology of browned waste liquid produced by PCB (Printed Circuit Board)

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Embodiment Construction

[0032] The present invention will be further described below in conjunction with the accompanying drawings.

[0033] Such as figure 1 Shown, the processing technology of browning waste liquid produced by printed PCB circuit board of the present invention comprises the following steps,

[0034] Step (A), adding 0.6-1g of ferrous sulfate in every liter of browning waste liquid, satisfying the condition of Fenton oxidation;

[0035] Step (B), performing Fenton oxidation on the browning waste liquid to oxidize and degrade the complexed copper in the browning waste liquid, and transform the complexed copper into ionic copper;

[0036] In step (C), the pH value of the browning waste liquid after the Fenton oxidation reaction is between 2.0-2.5, and the pH value is adjusted to 4.5-5.5 by adding alkali; at the same time, an appropriate amount of flocculants PFS and PAM are added, wherein each liter of browning waste liquid The amount of flocculant PFS added to waste liquid is 0.8g, ...

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PUM

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Abstract

The invention discloses a treatment technology of browned waste liquid produced by PCB (Printed Circuit Board). Through chemical treatment, complex copper in the browned waste liquid can be convertedinto ionic copper; by adopting an electrolytic treatment mode, valuable elementary copper in the browned waste liquid can be extracted; by adopting a biological treatment mode, great reduction of indexes of all pollutants in the browned waste liquid is realized, up-to-standard emission of the browned waste liquid produced by the PCB can be realized, a process is ingenious, the operation is convenient, and a good application prospect is obtained.

Description

technical field [0001] The invention relates to the technical field of PCB circuit board manufacturing, in particular to a process for treating browning waste liquid produced by printing PCB circuit boards. Background technique [0002] In the manufacturing process of printed PCB circuit boards, browning treatment technology is required to promote the bonding of inorganic / organic interfaces between the surface of copper foil and polymer resin. The essence of browning treatment technology is that copper is oxidized to cuprous oxide (Cu 2 O), the surface film formed by cuprous oxide is complete and dense, and the combination with the polymer resin is extremely firm, ensuring good electrical conductivity between the multilayers of the PCB circuit board. [0003] At present, the common browning treatment technology includes the following steps: pickling→alkali washing→presoaking→browning, wherein the browning reaction is a copper corrosion reaction, and as the browning reaction...

Claims

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Application Information

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IPC IPC(8): C02F9/14C22B7/00C22B15/00C25C1/12C02F103/16
CPCC02F1/461C02F1/56C02F1/66C02F1/722C02F1/725C02F3/02C02F3/28C02F9/00C02F2103/16C22B7/006C22B15/0089C25C1/12Y02P10/20
Inventor 金洪建闫梦博黄晓波
Owner WUXI SHENNAN CIRCUITS CO LTD
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