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Method for preparing high-purity cupric oxide powder from acid cupriferous waste liquid

A technology of copper oxide powder and waste liquid, which is applied in the direction of copper oxide/copper hydroxide, etc., can solve the problems of high-purity copper oxide powder filtration and washing difficulties, and achieve the effect of eliminating the difficulty of re-filtration, simple process and eliminating the difficulty of washing

Active Publication Date: 2009-10-07
SHANGHAI MEADVILLE SCI & TECH
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  • Claims
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Problems solved by technology

[0006] Aiming at the problem of difficult filtration and washing of high-purity copper oxide powder prepared by precipitation method, the purpose of the present invention is to propose a method for preparing high-purity copper oxide powder through acidic copper-containing waste liquid, which omits the complicated washing process of the existing precipitation method , simple process, high economic benefit, suitable for industrial production

Method used

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  • Method for preparing high-purity cupric oxide powder from acid cupriferous waste liquid

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Effect test

Embodiment 1

[0037] Take the acidic etching waste liquid (mainly containing Cu 2+ : 130-140g / L, HCl: 80-110g / l, NaClO: 4-6g / l) in a beaker, mix and react with precipitant under high-speed stirring state (mass percentage is 30% sodium hydroxide and 30% % sodium carbonate mixed solution), the pH value of the mixture after the reaction was 11.0 ± 0.5. The resulting mixture was transferred to a sand core funnel for suction filtration, then washed with water, then washed with a mixed aqueous solution of 1% by mass of ammonium carbonate and ammonium bicarbonate, and finally washed with water. The washed filter cake is dried at 50°C, then calcined at 400°C, and finally crushed to obtain high-purity copper oxide powder.

Embodiment 2

[0039] Take the acidic etching waste liquid (mainly containing Cu 2+ : 130-140g / L, HCl: 80-110g / l, NaClO: 4-6g / l) in a beaker, mix and react with precipitant under high-speed stirring state (mass percentage is 40% potassium hydroxide and 10 % ammoniacal liquor), the pH of the mixture was 9.0 ± 0.5 after the reaction. The resulting mixture was transferred to a sand core funnel for suction filtration, then washed with water, then washed with 20% by mass ammonium nitrate aqueous solution, and finally washed with water. The washed filter cake is dried at 60°C, then calcined at 800°C, and finally crushed to obtain high-purity copper oxide powder.

Embodiment 3

[0041] Take the acidic etching waste liquid (mainly containing Cu 2+ : 130-140g / L, HCl: 80-110g / l, NaClO: 4-6g / l) in a beaker, mixed with a precipitant under high-speed stirring to react (sodium hydroxide solution with a mass percentage of 30%) , the pH of the mixture was 11.0±0.5 after the reaction. Transfer the reaction mixture to a sand core funnel for suction filtration, then wash with water, then with 0.1% by mass aqueous ammonia solution, and finally with water. The washed filter cake is dried at 50°C, then calcined at 900°C, and finally crushed to obtain high-purity copper oxide powder.

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Abstract

The invention relates to a method for preparing high-purity cupric oxide powder from acid cupriferous waste liquid, which comprises the following steps: mixing the acid cupriferous waste liquid and a precipitator (such as hydrocarbonate, carbonate, ammonia, sodium hydroxide or potassium hydroxide, and the like) to react until cupric ions are completely precipitated; washing precipitated slurry with a washing agent (a water solution containing a certain amount of electrolytes) after filtration, and then washing with water; and drying, calcining and pulverizing cupriferous materials after washing to obtain high-purity superfine cupric oxide powder. The acid cupriferous waste liquid can be acid etching waste liquid produced in the production of printed circuit boards. The cupric oxide powder prepared by the method has high purity, simple processes, low production cost and high economic benefit, and is suitable for industrialized production.

Description

technical field [0001] The invention relates to a method for preparing high-purity copper oxide powder, in particular to a method for preparing copper oxide powder through acidic copper-containing waste liquid. Background technique [0002] High-purity copper oxide powder is an important multifunctional inorganic fine material, which is widely used in the fields of catalysis, electronics, superconductivity, printing and dyeing, organic synthesis, ceramics, glass and medicine. Among them, the electroplating grade copper oxide used in the production of printed circuit boards has higher requirements on purity and particle size. [0003] At present, the production of copper oxide is mostly prepared by simple copper. The production method of copper oxide powder is to spray molten copper at high temperature (about 1300°C) by spraying method, and combine with oxygen in the air to form copper oxide powder. Alternatively, the elemental copper is dissolved and converted into copper ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G3/02
Inventor 廖奕坤石晶吴金华
Owner SHANGHAI MEADVILLE SCI & TECH
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