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A kind of preparation method of electroplating grade copper sulfate

A copper sulfate, electroplating-grade technology, applied in the preparation of copper sulfate and copper compounds, can solve the problems of environmental pollution and high treatment costs, and achieve the effects of reducing production costs, high economic efficiency, and avoiding waste water discharge.

Active Publication Date: 2022-06-21
XIAMEN RUNNER IND CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In surface treatment electrodeposition, a large amount of acid copper process is used, and a large amount of copper salt wastewater is generated every day, which pollutes the environment and has high treatment costs.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The preparation method of electroplating grade copper sulfate of the present invention, its concrete steps are as follows:

[0041] (1) Collect acid copper wastewater by mass separation.

[0042] (2) The organic matter such as brightener and wetting agent in the acid copper wastewater is adsorbed by chelating anion resin.

[0043] (3) Adsorb copper ions with selective copper ion cation resin until the adsorption of selective copper ion cation resin is in a saturated state.

[0044] (4) Desorb and regenerate the selective copper ion cation resin in step (3) with 5% (v / v) strong acid to obtain a concentrated copper sulfate solution; wherein, in the concentrated copper sulfate solution, Cu 2+ The concentration is 35g / L, and the pH value is 1.0.

[0045] (5) Add 1ml / L hydrogen peroxide to the concentrated copper sulfate solution obtained in step (4), heat it to 50°C, keep constant temperature and blow air for 4h.

[0046] (6) Cool the solution in step (5) to room tempera...

Embodiment 2

[0062] The preparation method of electroplating grade copper sulfate of the present invention, its concrete steps are as follows:

[0063] (1) Collect acid copper wastewater by mass separation.

[0064] (2) The organic matter such as brightener and wetting agent in acid copper wastewater is adsorbed by chelating anion resin.

[0065] (3) Adsorb copper ions with selective copper ion cation resin until the adsorption of selective copper ion cation resin is in a saturated state.

[0066] (4) Desorb and regenerate the selective copper ion cation resin in step (3) with 20% (v / v) strong acid to obtain a concentrated copper sulfate solution; wherein, in the concentrated copper sulfate solution, Cu 2+ The concentration is 40g / L, and the pH value is 1.5.

[0067] (5) Add 10ml / L hydrogen peroxide to the concentrated copper sulfate solution obtained in step (4), heat to 70°C, keep constant temperature and blow air for 6h.

[0068] (6) Cool the solution in step (5) to room temperature, a...

Embodiment 3

[0084] The preparation method of electroplating grade copper sulfate of the present invention, its concrete steps are as follows:

[0085] (1) Collect acid copper wastewater by mass separation.

[0086] (2) The organic matter such as brightener and wetting agent in acid copper wastewater is adsorbed by chelating anion resin.

[0087] (3) Adsorb copper ions with selective copper ion cation resin until the adsorption of selective copper ion cation resin is in a saturated state.

[0088] (4) Desorb and regenerate the selective copper ion cation resin in step (3) with 15% (v / v) strong acid to obtain a concentrated copper sulfate solution; wherein, in the concentrated copper sulfate solution, Cu 2+ The concentration is 45g / L and the pH value is 1.5.

[0089] (5) Add 5ml / L hydrogen peroxide to the concentrated copper sulfate solution obtained in step (4), heat it to 60°C, keep constant temperature and blow air for 5h.

[0090] (6) Cool the solution in step (5) to room temperature...

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Abstract

The invention provides a method for preparing electroplating-grade copper sulfate. The method comprises: using acid copper wastewater as a raw material, absorbing organic matter in acid copper wastewater through chelating resin, and using selective copper ion cation resin to adsorb organic matter in acid copper wastewater Add strong acid to desorb and regenerate the selective copper ion cation resin to obtain a concentrated copper sulfate solution, add hydrogen peroxide to the concentrated copper sulfate solution, and perform weak electrolysis, filtration and adjustment to the concentrated copper sulfate solution after adding hydrogen peroxide. pH and crystallization, copper sulfate crystals were obtained. According to the preparation method of electroplating grade copper sulfate of the present invention, the copper sulfate crystal prepared by it is delicate, has little water content, and high purity, which can reach more than 99.9%, and the method can reduce waste water discharge and treatment cost, environmental protection and emission reduction.

Description

technical field [0001] The invention relates to the field of copper salt production technology, in particular to a method for preparing high-purity electroplating-grade copper sulfate by recycling acid copper wastewater. Background technique [0002] In surface treatment electrodeposition, a large amount of acid copper is used, which produces a large amount of copper salt wastewater every day, which causes environmental pollution and high treatment costs. [0003] Therefore, it is necessary to provide a new technical solution. SUMMARY OF THE INVENTION [0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a preparation method of electroplating-grade copper sulfate, which can reduce waste water discharge and treatment costs, and reduce environmental protection and emission reduction. [0005] In order to achieve the above object, a kind of preparation method of electroplating grade copper sulfate of the present invention,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G3/10
CPCC01G3/003C01G3/10C01P2006/80
Inventor 傅盈盈林志敏乔永亮蒋义锋
Owner XIAMEN RUNNER IND CORP
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