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

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...

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