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Method for producing electroplating-grade copper oxide by utilizing acidic etching waste liquid

A technology of electroplating copper oxide and acidic etching waste liquid, which is applied in the direction of copper oxide/copper hydroxide, etc., to achieve the effects of improving collection efficiency, enhancing purity, and increasing production volume

Inactive Publication Date: 2021-02-12
深圳市祺鑫环保科技有限公司
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  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of this invention is to provide a kind of method that utilizes acidic etching waste liquid to produce electroplating grade copper oxide, to solve the above-mentioned weak points in the prior art

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  • Method for producing electroplating-grade copper oxide by utilizing acidic etching waste liquid
  • Method for producing electroplating-grade copper oxide by utilizing acidic etching waste liquid

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[0024]In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail with reference to the accompanying drawings.

[0025]The present invention providesFigure 1-2The shown method for producing electroplating-grade copper oxide using acid etching waste liquid includes the following steps:

[0026]Step 1. Set up a rotatable reaction cylinder 1 and rotate it through the support frame 2. Install a lifting scraper 12 that can slide up and down inside the reaction cylinder 1, and install a precision filter 13 inside the lifting scraper 12 , After inserting the lifting scraper 12 into the bottom of the reaction cylinder 1, the acidic etching solution after filtering and removing impurities is introduced into the reaction cylinder 1 to prepare for processing;

[0027]Step 2. Gradually add an oxidant to the reaction cylinder 1 to oxidize the free copper ions in the acid etching solution, and ...

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Abstract

The invention discloses a method for producing electroplating-grade copper oxide by using acidic etching waste liquid, which comprises the following steps: arranging a rotatable reaction cylinder, carrying out rotary support through a support frame, installing a lifting scraping disc capable of sliding up and down in the reaction cylinder, and installing a precision filter screen in the lifting scraping disc, after the lifting scraping disc is inserted into the bottom of the reaction cylinder, introducing filtered and impurity-removed acidic etching liquid into the reaction cylinder for preparation treatment, gradually adding an oxidizing agent into the reaction cylinder to oxidize free copper ions in the acidic etching liquid, and driving the reaction cylinder by an external motor to slowly rotate. By arranging the rotatable reaction cylinder, solution reaction is accelerated by controlling the reaction cylinder to rotate slowly, small flocculent precipitate can be attached to the inner wall of the reaction cylinder under the action of centrifugal force by controlling the reaction cylinder to rotate at a high speed, and the precipitate can be brought out upwards by pulling the lifting scraping disc upwards slowly; the sediment collection efficiency is greatly improved.

Description

Technical field[0001]The invention relates to the technical field of etching solution treatment, in particular to a method for producing electroplating grade copper oxide by using acid etching waste solution.Background technique[0002]At present, PCB production has formed a large-scale industry in China. CB production produces a large amount of etching solutions. PCB etching solutions mainly include alkaline etching solutions and acid etching solutions. The total amount of copper in the etching waste liquid is about 50,000 tons per year. It has the characteristics of many types, high toxicity and strong corrosiveness. It belongs to the national first-class hazardous waste. The alkaline etching waste liquid contains copper ammonia complex, ammonium chloride and ammonia water, and the copper content can reach 120-170g / L. If it is directly discharged, it will bring serious harm to the environment. In the production of printed boards, the etching waste liquid needs to be recycled to achi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G3/02
CPCC01G3/02C01P2006/80
Inventor 李再强黄文涛梁民曹玉萍
Owner 深圳市祺鑫环保科技有限公司
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