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Impurity removal method of copper sulfate solution

A copper sulfate solution and solution technology, applied in the direction of improving process efficiency, etc., can solve the problems of limited application scope, complicated impurity removal process, low zinc and iron removal efficiency, etc., and achieve the effect of overcoming treatment difficulties.

Pending Publication Date: 2021-02-23
GUANGZHOU KECHENG ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved in the present invention is to overcome the defects and deficiencies of the existing copper sulfate solution, such as complex removal process, low zinc and iron removal efficiency and limited scope of application, and provide a method for removing impurities from copper sulfate solution

Method used

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  • Impurity removal method of copper sulfate solution
  • Impurity removal method of copper sulfate solution
  • Impurity removal method of copper sulfate solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A method for removing impurities of copper sulfate solution, comprising the steps of:

[0039] S1. pH adjustment of the copper sulfate solution: adjust the pH value of the copper sulfate solution to 2.4 with 98% concentrated sulfuric acid;

[0040] S2. Removal of iron and zinc by resin: The above-mentioned copper sulfate solution adjusted to pH in S1 flows forward through the P507 extraction resin column at a flow rate of 1 BV / h to obtain a copper sulfate solution for removing impurities.

[0041] Among them, the P507 extraction resin column is regenerated by the following method:

[0042] S3. Pickling: use H-containing P507 resin saturated with iron and zinc ions + The dilute hydrochloric acid solution with a concentration of 6mol / L is washed forward, the flow rate of the dilute hydrochloric acid solution in the resin column is 1BV / h, and the water is washed until the effluent is colorless;

[0043] S4. Washing with water: wash the above acid-washed P507 resin until th...

Embodiment 2

[0048] A method for removing impurities of copper sulfate solution, comprising the steps of:

[0049] S1. pH value adjustment of copper sulfate solution: adjust the pH value of copper sulfate solution to 2.9 with 50% sulfuric acid solution;

[0050] S2. Removal of iron and zinc by resin: the copper sulfate solution adjusted in pH above S1 was flowed forward through the P507 extraction resin column at a flow rate of 30BV / h to obtain a copper sulfate solution for removing impurities.

[0051] Among them, the P507 extraction resin column is regenerated by the following method:

[0052] S3. Pickling: use H-containing P507 resin saturated with iron and zinc ions + The dilute sulfuric acid solution with a concentration of 1mol / L is washed forward, the flow rate of the dilute sulfuric acid solution in the resin column is 20BV / h, and the water is washed until the effluent is colorless;

[0053] S4. Washing with water: washing the above acid-washed P507 resin until the pH value of th...

Embodiment 3

[0058] A method for removing impurities of copper sulfate solution, comprising the steps of:

[0059] S1. pH adjustment of the copper sulfate solution: adjust the pH value of the copper sulfate solution to 2.6 with 98% concentrated sulfuric acid;

[0060] S2. Removal of iron and zinc by resin: the above-mentioned S1 copper sulfate solution adjusted to pH is flowed forward through the P507 extraction resin column at a flow rate of 15BV / h to obtain a copper sulfate solution for removing impurities.

[0061] Among them, the P507 extraction resin column is regenerated by the following method:

[0062] S3. Pickling: use H-containing P507 resin saturated with iron and zinc ions + The dilute hydrochloric acid solution with a concentration of 3mol / L is washed forward, the flow rate of the dilute hydrochloric acid solution in the resin column is 10BV / h, and the water is washed until the effluent is colorless;

[0063] S4. Washing with water: wash the above acid-washed P507 resin unti...

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Abstract

The invention discloses an impurity removal method of a copper sulfate solution. The impurity removal method comprises the following steps that S1, a pH value of the copper sulfate solution is adjusted, specifically, the pH value of the copper sulfate solution is adjusted to be 2.4-2.9; and S2, iron and zinc are removed through resin, specifically, the copper sulfate solution of which the pH valueis adjusted in the step S1 flows through P507 extraction resin in the forward direction at the flow rate of 1-30BV / h to obtain an impurity-removed copper sulfate solution. According to the impurity removal method, the pH value of the copper sulfate solution is adjusted to be 2.4-2.9 before impurity removal is conducted by adopting the P507 extraction resin, the content of zinc ions in the coppersulfate solution is reduced to 1.0 mg / L or below and the content of iron ions in the copper sulfate solution is reduced to 0.3 mg / L or below after impurity removal, the loss rate of copper in the copper sulfate solution in the impurity removal process is smaller than 1%, the recycling frequency of the copper sulfate solution in the production process is increased, and the P507 extraction resin canfurther be regenerated and reused through acid. The impurity removal method has the advantages of being simple in process, short in flow, low in production cost, free of pollution and the like, and can be widely applied to recovery and impurity removal of the copper sulfate solution.

Description

technical field [0001] The invention relates to the technical field of impurity removal in chemical industry, in particular to a method for removing impurities from a copper sulfate solution. Background technique [0002] Copper sulfate is one of the most important copper compounds and is widely used in many industries. In industry, copper sulfate can be used to synthesize a variety of copper compounds, and copper cathode can also be prepared; in agriculture, copper sulfate can be used as an important inorganic pesticide raw material, and can also be used as a trace element additive in feed. In addition, copper sulfate can also be used For coatings, wood preservatives, etc. With the rapid development of my country's printed circuit board industry, the demand for electroplating grade copper sulfate is increasing day by day. Electroplating grade copper sulfate not only requires high purity of copper sulfate, but also requires low metal impurity content. Not more than 0.002%. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/38C22B15/00
CPCC22B15/0086C22B3/3846Y02P10/20
Inventor 王伍查正炯叶成伟王永成
Owner GUANGZHOU KECHENG ENVIRONMENTAL PROTECTION TECH
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