Production process for producing high-purity copper sulfate by pressurization method

Abstract

The invention discloses a production process for producing high-purity copper sulfate by a pressurization method. The production process comprises the following steps: (1) adding A-grade or 1 # cathode copper, copper sulfate mother liquor and concentrated sulfuric acid into a reaction kettle; (2) pouring air into the chemical liquid in the reaction kettle to enable oxygen in the air to participate in reaction, enabling one part of the pressurized copper material to react with sulfuric acid to generate copper sulfate and the other part of the pressurized copper material to generate cuprous sulfate, releasing heat in the chemical reaction process of the chemical liquid, and controlling the temperature of the chemical liquid to be 80-95 DEG C and the reaction time to be 6-8 hours to generate sulfate precipitates; (3) filtering out sulfate precipitates and copper scraps; (4) adding hydrogen peroxide into the filtered mixed solution, boiling, and converting cuprous sulfate into copper sulfate; (5) automatically cooling the copper sulfate solution until the copper sulfate solution is cooled to room temperature, and crystallizing copper sulfate in the solution; and (6) filtering to obtain copper sulfate crystals, and drying to obtain the final high-purity copper sulfate product which is high in purity and good in quality.

Description

Technical field:

[0001] The invention relates to a production process for producing high-purity copper sulfate by pressurization. Background technique:

[0002] At present, there are two main production methods of copper sulfate in China: one is the sulfuric acid synthesis method after neutralization of circuit board etching solution. Since the raw material is waste from the circuit board industry, the quantity is large, and some manufacturers only care about the output and ignore the quality. , The quality of the products is poor, and the products produced are all industrial-grade products, which leads to the fact that manufacturers with the technology to produce high-purity copper sulfate cannot obtain raw materials. The other is to use copper waste to react with acid and air. This raw material often contains other metal impurities, which affects product quality. Copper blocks are used because the reaction speed is too slow and there is no output, and the cost is too high....

Examples

Embodiment

[0027] Weigh 40 kg of copper bars and place them in a 25L reactor to 2 / 3 of the volume, and add 20L of copper sulfate mother liquor with a copper ion content of 60±5g / L and a sulfuric acid content of 14-18%. When it reaches 80 degrees, stop heating. Analyze copper ions and acidity content. Pressurized reaction, after 4 hours of pressurized reaction, detect the rising speed of copper ions in time intervals, when the copper ions rise to 140g / L, the material is discharged, filtered to remove impurities, cooled to crystallize, separated and dried. Get the finished product.

Technical field:

[0001] The invention relates to a production process for producing high-purity copper sulfate by pressurization. Background technique:

[0002] At present, there are two main production methods of copper sulfate in China: one is the sulfuric acid synthesis method after neutralization of circuit board etching solution. Since the raw material is waste from the circuit board industry, the quantity is large, and some manufacturers only care about the output and ignore the quality. , The quality of the products is poor, and the products produced are all industrial-grade products, which leads to the fact that manufacturers with the technology to produce high-purity copper sulfate cannot obtain raw materials. The other is to use copper waste to react with acid and air. This raw material often contains other metal impurities, which affects product quality. Copper blocks are used because the reaction speed is too slow and there is no output, and the cost is too high....

Examples

Embodiment

[0027] Weigh 40 kg of copper bars and place them in a 25L reactor to 2 / 3 of the volume, and add 20L of copper sulfate mother liquor with a copper ion content of 60±5g / L and a sulfuric acid content of 14-18%. When it reaches 80 degrees, stop heating. Analyze copper ions and acidity content. Pressurized reaction, after 4 hours of pressurized reaction, detect the rising speed of copper ions in time intervals, when the copper ions rise to 140g / L, the material is discharged, filtered to remove impurities, cooled to crystallize, separated and dried. Get the finished product.

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