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Method for producing copper chloride through waste etching liquid containing copper

A technology for etching waste liquid and acid etching waste liquid, applied in copper chloride, copper halide and other directions, can solve problems such as harsh reaction conditions, and achieve the effect of simple production method, reducing pollution and making full use of resources

Inactive Publication Date: 2015-11-04
沈国强
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method improves the production efficiency, the reaction conditions are relatively harsh.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A method for producing copper chloride from copper-containing etching waste liquid, comprising the following steps: adding clear water with 1 / 3 of the capacity of the neutralization tank to the neutralization tank, heating the clear water, and adding the neutralization Slowly drop acidic etching waste liquid and alkaline etching waste liquid into the kettle, the volume flow ratio of acidic etching waste liquid and alkaline etching waste liquid is 1:1, and keep the reaction temperature at 50°C, control the pH value to 4.5 to fully react. If the pH value is higher than this value, the speed of acidic etching waste liquid dripping will be accelerated; if the pH value is lower than this range, the speed of alkaline etching waste liquid dripping will be accelerated; Under these reaction conditions, react for 5 hours, centrifuge and rinse the reacted feed liquid to obtain basic copper chloride crystals; after centrifuging and rinsing the crystals, obtain dark green basic chlor...

Embodiment 2

[0029] A method for producing copper chloride from copper-containing etching waste liquid, comprising the following steps: adding clear water with 1 / 3 of the capacity of the neutralization tank to the neutralization tank, heating the clear water, and adding the neutralization Slowly drop acidic etching waste liquid and alkaline etching waste liquid into the kettle, the volume flow ratio of acidic etching waste liquid and alkaline etching waste liquid is 1:1, and keep the reaction temperature at 60°C, control the pH value to 5, and fully react. If the pH value is higher than this value, the speed of acidic etching waste liquid dripping will be accelerated; if the pH value is lower than this range, the speed of alkaline etching waste liquid dripping will be accelerated. ; Under this reaction condition, react for 4 hours, centrifuge and rinse the reacted feed liquid to obtain basic copper chloride crystals; the crystals will contain 59.91% copper and have a particle size of 188 μm...

Embodiment 3

[0032] A method for producing copper chloride from copper-containing etching waste liquid, comprising the following steps: adding clear water with 1 / 3 of the capacity of the neutralization tank to the neutralization tank, heating the clear water, and adding the neutralization Slowly drop acidic etching waste liquid and alkaline etching waste liquid into the kettle, the volume flow ratio of acidic etching waste liquid and alkaline etching waste liquid is 1:1, and keep the reaction temperature at 70°C, control the pH value to 5.5, and fully react. If the pH value is higher than this value, the speed of acidic etching waste liquid dripping will be accelerated; if the pH value is lower than this range, the speed of alkaline etching waste liquid dripping will be accelerated. ; Under this reaction condition, react for 4.5 hours, centrifuge and rinse the reacted feed liquid to obtain basic copper chloride crystals; the crystals will contain 59.21% copper and have a particle size of 20...

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PUM

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Abstract

The invention relates to a method for producing copper chloride through waste etching liquid containing copper. The method includes the following steps that 1, clean water is added in a neutralization kettle and heated, the acidic waste etching liquid and the alkaline waste etching liquid are added into the neutralization kettle for reaction, and the reacted liquid is subjected to centrifugation and rinsing to obtain copper chloride crystals; 2, the copper chloride crystals generated in the first step react with hydrochloric acid to obtain a copper chloride solution, and the solution is concentrated and crystallized to obtain a copper chloride dihydrate product; 3, the copper chloride dihydrate is dehydrated into anhydrous cupric chloride. The method has the advantages that the waste etching liquid containing copper is adopted to produce copper chloride, copper can be recovred and utilized better, and besides, pollution of the waste etching liquid containing copper to the environment is reduced; when the waste etching liquid containing copper is used for producing the copper chloride, impurities of the waste etching liquid containing copper do not need to be removed before the waste etching liquid is used, the purity of the prepared copper chloride is high, the production method is simple, and cost is low.

Description

technical field [0001] The invention relates to a method for producing copper chloride, in particular to a method for producing copper chloride by utilizing copper-containing etching waste liquid. Background technique [0002] Copper chloride has a wide range of uses. It is often used as an oxidizing agent, wood preservative, food additive, disinfectant, etc. It is also used for deodorization and desulfurization of petroleum fractions, metal refining, and photography. And the method for producing cupric chloride at present mainly is to make cupric oxide and hydrochloric acid reaction, and production cost is higher, and yield is low; Cuprous, so the reaction steps are cumbersome, the cost is high, and the efficiency is low, so it is not suitable for large-scale industrial production. [0003] In recent years, the rapid development of my country's electronics industry has caused a large amount of circuit board etching waste liquid and discharge. The etching waste liquid mainl...

Claims

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Application Information

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IPC IPC(8): C01G3/05
Inventor 沈国强
Owner 沈国强
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