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Technology for recovering copper from brownification waste liquid

A technology for recovering copper and waste liquid, applied in the field of copper recovery, can solve the problems of complex copper ion recovery technology process, secondary pollution of solid waste, low recovery efficiency, etc., and achieves easy electrolysis, high recovery efficiency, and simplified processing procedures. Effect

Inactive Publication Date: 2016-12-07
深圳市京中康科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For this reason, the technical problem to be solved by the present invention is that the existing copper ion recovery technology has complicated process, high processing cost, low recovery efficiency and secondary pollution caused by solid waste, so a method with low cost, simple process and high recovery efficiency is proposed. A process for recovering copper from browning waste liquid without secondary pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The present embodiment provides a kind of technology that reclaims copper from browning waste liquid, and it comprises the steps:

[0022] a. Add additives to the browning waste liquid, the quality of the additives accounts for 5‰ of the quality of the browning liquid. In terms of mass percentage, the additives include 0.01% of complex substitution salts and 0.01% of surface activity agent, 0.1% leveling agent, the balance is a solvent, the complex substitute salt is magnesium sulfate, the surfactant is aminotriethanol, and the leveling agent is polyethyleneimino compound--polyethanolamine , the solvent is water;

[0023] b. Electrolyze while stirring at a stirring speed of 15L / min. During the stirring process, pump air into the electrolytic cell to strengthen the stirring and promote the local concentration of various ions in the solution under the action of electric current to be stirred evenly again. The electrolysis process Medium current density is 150A / m 2 After...

Embodiment 2

[0025] The present embodiment provides a kind of technology that reclaims copper from browning waste liquid, and it comprises the steps:

[0026] a. Add additives to the browning waste liquid, the quality of the additive accounts for 1% of the mass of the browning liquid, in terms of mass percentage, the additive includes 20% complex substitution salt, 10% surface activity agent, 5% leveling agent, and the balance is a solvent. The complex substitute salt is sodium chloride and zinc nitrate, wherein sodium chloride accounts for 30% of the total mass of the complex substitute salt, and the surface The active agent is sodium lauryl sulfate, the leveler is pyridinium sulfonate, and the solvent is water;

[0027] b. Electrolyze while stirring at a stirring speed of 550L / min. During the stirring process, pump air into the electrolytic cell to strengthen the stirring and promote the local concentration of various ions in the solution under the action of electric current to be stirre...

Embodiment 3

[0029] The present embodiment provides a kind of technology that reclaims copper from browning waste liquid, and it comprises the steps:

[0030] a. Add additives to the browning waste liquid, in terms of mass percentage, the additives include 1% complex substitution salts, 5.0% surfactants, 0.8% leveling agents, and the balance is solvents. The complex substitution salt is calcium formate and nickel oxalate, wherein calcium formate accounts for 50% of the total mass of the complex substitution salt, the surfactant is nonyl polyoxyethylene ether, and the leveling agent is alkyl Phenol polyoxyethylene ether, the solvent is water;

[0031] b. Electrolyze while stirring at a stirring speed of 50L / min. During the stirring process, pump air into the electrolytic cell to strengthen the stirring and promote the local concentration of various ions in the solution under the action of electric current to be stirred evenly again. The electrolysis process Medium current density is 300A / m...

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Abstract

The invention discloses a technology for recovering copper from a brownification waste liquid. The technology comprises steps as follows: a, an additive is added to the brownification waste liquid, accounts for 5 permillage-2 percent of a brownification liquid in mass and is prepared from, in percentage by mass, 0.01%-20% of complex substituted salt, 0.01%-10% of a surfactant, 0.1%-5% of a leveling agent and the balance of a solvent; b, electrolysis is performed while stirring, and copper elements are obtained. The additive is added to the brownification liquid, hydrogen peroxide in the brownification liquid is removed through electrolysis, so that the concentration of the liquid is reduced to an acceptable range, at the moment, cations in the complex substituted salt exchange with complexed copper ions in a solution so as to substitute the pattern of complexing with an organic matter, and the exchanged copper ions are electrolyzed and settled under the action of current and become the copper elements. With the method, the recovery efficiency is high, the technological process is simple, heating is not required, energy is saved, emissions are reduced, secondary pollution caused by solid waste is avoided, further subsequent treatment is not required, and the treatment procedure is simplified.

Description

technical field [0001] The invention belongs to the technical field of resource recovery, in particular to a process for recovering copper from browning liquor. Background technique [0002] In the production process of printed circuit board (PCB), in order to prevent the oxidation of the copper surface of the inner layer circuit board and enhance the bonding force during the lamination process, browning treatment technology is required to improve the stability of the inner layer board. Browning technology The copper surface of the PCB is micro-etched by the browning solution containing sulfuric acid and hydrogen peroxide, and a layer of browning film is formed with the participation of organic additives to increase the interlayer lamination performance and protect the copper surface. Browning liquid contains many toxic organic substances, such as triazoles, polyglycols, etc., and copper ions are easy to form complexes with them. When the copper ion content continues to ris...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C1/12
CPCC25C1/12Y02P10/20
Inventor 张建军周京萍何国雄
Owner 深圳市京中康科技有限公司
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