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Copper nitrate waste solution regeneration and copper recycle method

A recovery method, copper nitrate technology, applied in photography technology, equipment, photography auxiliary technology, etc., can solve the problem that the waste liquid cannot be recycled, and achieve the effects of reducing emissions, protecting the environment, and saving resources

Inactive Publication Date: 2019-04-19
HUIZHOU ZHENDING ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The treatment methods in the prior art can only recover the copper with high value, and cannot realize the recycling of the waste liquid

Method used

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Embodiment Construction

[0015] A number of implementations of the present application will be disclosed below, and for the sake of clarity, many practical details will be described together in the following description. It should be understood, however, that these practical details should not be used to limit the application. That is to say, in some embodiments of the present application, these practical details are unnecessary.

[0016] A kind of copper nitrate waste liquid regeneration and copper recovery method comprise the following steps in the present embodiment:

[0017] In step 1, the copper nitrate waste liquid is added with an ammonia-containing additive to inhibit the reaction, wherein the volume ratio of the ammonia-containing additive to the copper nitrate waste liquid is 6-9:1000. In a specific embodiment, 10L of copper nitrate waste water is introduced into the transfer tank, and the transfer tank is used to hold the copper nitrate waste water for inhibition reaction, and it can also ...

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Abstract

The invention discloses a copper nitrate waste solution regeneration and copper recovery method. The main steps of the method are as follows: step 1, the copper nitrate waste solution is added with anammonia-containing additive to be subjected to an inhibition reaction; step 2, the copper nitrate waste solution after the reaction is electrolyzed to obtain copper, waste solution and nitrogen dioxide, and the nitrogen dioxide is output to an absorption device for absorbing to obtain a first acidic solution; step 3, the waste solution after electrolyzed is transferred to a transfer device and added with an oxidant for an oxidation reaction, and after cooling, a nitric acid is added to obtain a second acidic solution; and step 4, the first acidic solution obtained in step 2 is mixed with thesecond acidic solution obtained in step 3 to obtain a regenerating solution. By means of the method, the waste solution after electrolytic recycle of copper is oxidized by adding an oxidizing substance, and after cooling to normal temperature, the nitric acid is added to regain the corrosion of the waste solution, so that the recycling of the copper nitrate waste solution is achieved, the discharging of the copper nitrate waste solution is reduced, the treatment burden of total nitrogen is relieved, the environment is protected, and the resource is saved.

Description

technical field [0001] The invention relates to the technical field of recycling copper nitrate waste water, in particular to a copper nitrate waste liquid regeneration and copper recovery method. Background technique [0002] Nitric acid stripping is an important process in the PCB manufacturing process. With the progress of the stripping process, the copper content is gradually saturated, the copper etching speed becomes slower, and the solution is extremely unstable, which cannot meet the requirements of the stripping process. At this time, the copper nitrate solution is used as waste liquid handling. The treatment method in the prior art can only recover the copper with high value, and cannot realize the recycling of the waste liquid. Contents of the invention [0003] Aiming at the deficiencies of the prior art, the invention provides a copper nitrate waste liquid regeneration and copper recovery method. [0004] A method for regeneration of copper nitrate waste liq...

Claims

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Application Information

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IPC IPC(8): C23F1/46C23F1/18C25C1/12
CPCC23F1/18C23F1/46C25C1/12Y02P10/20
Inventor 朱识芝李强邓景永
Owner HUIZHOU ZHENDING ENVIRONMENTAL PROTECTION TECH CO LTD