Preparation method and application of high-purity copper sulfate

By reacting ammonia water with copper chloride solution to form alkaline copper chloride, and performing multiple steps to remove impurities, finally reacting with sulfuric acid to produce high-purity copper sulfate, solving the problem of high impurity content in copper sulfate in the prior art, achieving high purity and low cost preparation.

CN120208280APending Publication Date: 2025-06-27GUANGZHOU KECHENG ENVIRONMENTAL PROTECTION TECH
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Patent Information

Application Number
CN202510357387.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-03-25
Publication Date
2025-06-27

AI Technical Summary

Technical Problem

Existing industrial-grade copper sulfate contains a large amount of impurities, which affects the quality of electronic components and integrated circuits, making it difficult to obtain copper sulfate with high purity and low impurity content.

Method used

The alkaline copper chloride is formed by reacting ammonia water with a copper chloride solution, followed by adding sulfuric acid to dissolve and remove impurities, and then reacting with an alkaline decompression solution to form alkaline copper carbonate and/or copper oxide, and finally reacting with sulfuric acid and crystallizing by cooling and reducing the temperature to produce high-purity copper sulfate.

Benefits of technology

It is realized that high-purity copper sulfate is prepared from copper chloride solution with high impurity content, which significantly reduces the preparation cost, removes trace amounts of impurities such as calcium, magnesium, iron, and chlorine, and improves the purity and yield of copper sulfate.

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Abstract

The invention discloses a preparation method and application of high-purity copper sulfate, and the preparation method comprises the following steps: reacting ammonia water with a copper chloride solution to obtain basic copper chloride; adding sulfuric acid into the basic copper chloride for dissolving, and removing impurities to obtain an acidic impurity-removed solution; reacting the acidic impurity removal liquid with the alkaline impurity removal liquid to obtain basic cupric carbonate and / or copper oxide; and adding sulfuric acid into the basic cupric carbonate and / or copper oxide for reaction, and cooling and crystallizing to obtain the high-purity copper sulfate. According to the preparation method of the high-purity copper sulfate, metal, nonmetal and other impurities in the raw materials can be removed, the impurity removal effect on trace impurities is obvious, new impurities are not introduced in the preparation process, the process is simple, industrial production can be achieved, and the obtained high-quality copper sulfate can be applied to the electroplating liquid and has good application prospects. Especially in the fields of electroplating of precision elements sensitive to impurities and semiconductors.
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