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Method for recycling copper extracted from alkaline copper chloride etching waste liquid

A technology for etching waste liquid and copper chloride, which is applied in photography process, electrodes, instruments, etc., can solve the problems of high processing cost, high transportation cost, unqualified processing, etc., and achieves high current efficiency, simple process and easy operation, and electrical low consumption effect

Inactive Publication Date: 2016-10-12
无锡派乐科技有限公司
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AI Technical Summary

Problems solved by technology

The current industrialized technologies include outsourcing chemical precipitation terminal treatment, online extraction electrolysis treatment, membrane electrolysis treatment, etc., which have disadvantages such as high transportation cost, high risk, generation of secondary pollution resources, high treatment cost and unqualified treatment.

Method used

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Embodiment 1

[0031] The method for extracting copper from alkaline copper chloride etching waste liquid of the present embodiment and recycling comprises the following steps:

[0032] The first step: prepare raw materials;

[0033] The second step: precise filtration to make a clean electrolyte without suspended solids, with a copper ion concentration of 190 g liters;

[0034] The third step: the configuration of the initial electrolyte, add 3 tons of filtered electrolyte in 10 tons of water, the copper ion concentration of the configured initial electrolyte is 90 g liters;

[0035] Step 4: After the initial electrolyte is generated, the electrolyte is pumped into the electrolytic cell to maintain the cathode surface area of ​​5L / min.m2 to maintain the internal circulation of the electrolytic cell. The temperature of the liquid is 50°C, and direct copper electrolysis is carried out after passing through the rectifier, and the electrolytic current density is 1200A / m2;

[0036] Step 5: Flo...

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PUM

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Abstract

The invention relates to a method for recycling copper extracted from alkaline copper chloride etching waste liquid. Alkaline chloride system copper-contained etching waste liquid adopts a direct electrolytic copper removal and regeneration industrial method, and adopts a direct copper electrolysis mode; and liquid after removing copper is mixed with collected and absorbed ammonia and electrolysis copper washing water to form standard regenerated alkaline chloride system etching liquid. The method electrolytically deposits copper by independent circulating speed of a cathode plate and high current density, so that the current efficiency is high, the power consumption is low, the quality of a copper plate reaches national first standard cathode copper, the realization is easy, and the alkaline chloride system etching liquid recovers the etching activity; the all-closed replenishing, collection and absorption of ammonia volatilized from the internal are performed to replenish the alkalinity of the regenerated etching liquid; and effective salt attached on the copper plate is mixed in two circulating liquid by a reasonable ratio, so that all effective chemical substances in the internal are stably recycled.

Description

technical field [0001] The invention relates to a method for extracting copper from alkaline copper chloride etching waste liquid and recycling it. Background technique [0002] In the process of the circuit board industry, a copper-containing etching solution of an alkaline chlorination system will be involved. During the etching process, an inactive etching waste solution will overflow, and the copper content can reach about 150 grams. ammonium chloride, ammonia water. Therefore, in the etching process, an online recycling system is added to make the etching process no longer produce waste liquid, ensuring green and clean production. The current industrialized technologies include outsourcing chemical precipitation terminal treatment, online extraction electrolysis treatment, membrane electrolysis treatment, etc., which have disadvantages such as high transportation cost, high risk, generation of secondary pollution resources, high treatment cost and unqualified treatment...

Claims

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Application Information

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IPC IPC(8): C25C1/12C25C7/02C23F1/46
CPCC23F1/46C25C1/12C25C7/02
Inventor 刘力
Owner 无锡派乐科技有限公司
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