Method and device for preparing copper oxychloride from acidic etching solution and alkaline etching solution

A technology of acid etching solution and copper oxychloride, applied in the direction of copper oxychloride, copper halide, etc., can solve the problems of low yield of copper oxychloride, high requirements for reaction solution, complicated operation, etc., to protect the environment and save resources , The effect of reducing processing costs

Active Publication Date: 2016-08-10
SHANGHAI LVCHENG ENVIRONMENTAL PROTECTION TECH
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  • Application Information

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Problems solved by technology

However, this method needs to condense and clarify the etching solution and remove impurities before the neutralization reaction, which has high requirements on the reaction solution and compl

Method used

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  • Method and device for preparing copper oxychloride from acidic etching solution and alkaline etching solution

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Experimental program
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Effect test

Embodiment 1

[0035] Add 1000L of water into the reaction kettle, heat it to 70°C, under stirring conditions, add 3300L of acidic etching solution and 3500L of alkaline etching solution into the reaction kettle at the same time; keep the temperature in the reaction kettle at 50°C and stir evenly , continue to drop the acidic etching solution, detect and adjust the pH value, so that the pH value of the reaction mixture solution is kept between 5 and 6, the reaction temperature is 50 ° C, and the reaction is 2 hours; after the reaction is sufficient, the reaction mixture solution After pressure filtration and drying, the solid substance cupric oxychloride was obtained with a content of 99.2%.

Embodiment 2

[0037] Add 1500L of water into the reaction kettle, heat it to 75°C, and add 5000L of acidic etching solution and 4800L of alkaline etching solution into the reaction kettle at the same time under stirring; keep the temperature in the reaction kettle at 50°C, stir evenly, Do not continue to drop the alkaline etching solution, check and adjust the pH value, so that the pH value of the reaction mixture solution is continuously maintained between 5 and 6, the reaction temperature is 50 ° C, and the reaction is 2.5 hours; after the reaction is sufficient, the reaction After the mixed solution is filtered and dried, the solid substance copper oxychloride is obtained with a content of 99.5%.

Embodiment 3

[0039]Add 2000L of water into the reaction kettle, heat it to 70°C, and add 8200L of acidic etching solution and 8200L of alkaline etching solution into the reaction kettle at the same time under stirring conditions; keep the temperature in the reaction kettle at 51°C, stir evenly, Constantly control the addition of acidic etching solution and alkaline etching solution, detect and adjust the pH value, so that the pH value of the reaction mixture solution is continuously maintained between 5 and 6, the reaction temperature is 48 ° C, and the reaction is 2 hours; after the reaction is fully Finally, the reaction mixture was filtered and dried to obtain 99.7% copper oxychloride as a solid.

[0040] The key technology of the present invention is the control of the reaction temperature and pH value in the reactor, the content of the finally produced copper oxychloride can reach more than 98%, the price is more than 30,000 yuan per ton, and considerable economic benefits can be reali...

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Abstract

The invention discloses a method and a device for preparing copper oxychloride from an acidic etching solution and an alkaline etching solution. The method includes the steps of (1), adding a certain amount of water into a reaction kettle, heating to 65-75 DEG C and adding the acidic etching solution and the alkaline etching solution with stirring; (2), keeping the temperature in the reaction kettle at 45-55 DEG C with uniformly stirring, and detecting and regulating a pH value to be kept between 5 and 6, wherein reaction temperature ranges from 48 DEG C to 51 DEG C and reaction time lasts for 2-3 hours; (3), subjecting a reaction mixture to filter pressing and drying after sufficient reaction so as to obtain solid copper oxychloride. The method and the device for preparing the copper oxychloride from the acidic etching solution and the alkaline etching solution have the advantages that recycling of active ingredients of the waste etching solution contributes to resource saving and environment protection; copper recovery rate is increased, copper oxychloride purity is enhanced and accordingly the method and the device have a promising market prospect.

Description

technical field [0001] The invention belongs to the technical field of electroplating wastewater treatment in the electronics industry, and in particular relates to a method and a device for preparing copper oxychloride by using an acidic etching solution and an alkaline etching solution. Background technique [0002] There are many cases of using electroplating in the electronics industry, among which copper sulfate electroplating occupies an extremely important position in PCB electroplating, so a considerable amount of copper sulfate waste liquid will be generated during use. If the waste liquid is discharged directly, it will seriously pollute the environment, and a waste of resource. [0003] At present, there are many ways to recover copper in the etching waste solution, and representative technologies include: 1. Chemical method. Add NaOH to the waste liquid, combine with copper ions to form copper hydroxide precipitation, and then make CuO or CuSO4 crystals, etc. Th...

Claims

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Application Information

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IPC IPC(8): C01G3/06
CPCC01G3/06C01P2006/80
Inventor 徐全林柏晓雪周伯明吴伟军
Owner SHANGHAI LVCHENG ENVIRONMENTAL PROTECTION TECH
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