Method for using copper sulfate waste liquid to prepare high-purity spherical copper oxide

A copper sulfate solution, copper sulfate technology, applied in copper oxide/copper hydroxide and other directions, can solve the problems of reduced purity of copper oxide, difficulty in stirring and heat transfer, etc., to ensure high purity, environmental friendliness, and less waste liquid. Effect

Active Publication Date: 2014-10-22
广东致卓环保科技有限公司
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Problems solved by technology

The disadvantage of this method is that copper hydroxide is viscous and gelatinous, it is difficult to stir and transfer heat, and it is

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  • Method for using copper sulfate waste liquid to prepare high-purity spherical copper oxide

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Embodiment Construction

[0024] The technical solutions of the present invention will be described in further detail below in conjunction with specific embodiments.

[0025] like figure 1 As shown, a method for preparing high-purity spherical copper oxide from copper sulfate waste liquid of the present invention comprises the following process steps:

[0026] a. Take 400mL copper sulfate waste liquid (see Table 1 for the composition of copper sulfate waste liquid), put it into a 500mL beaker, place it on a constant temperature magnetic stirrer, and add 1.0mL mass fraction to the solution at room temperature under low-speed stirring. It is a 30% hydrogen peroxide solution, and 23.8g Cu is added to the solution after 30min of reaction 2 (OH) 2 CO 3 After the solid powder adjusts the pH value of the solution to 3.5, continue stirring for 30min, stand for 12h, and filter;

[0027] b. Put the filtrate obtained in the above step into a 1L beaker, measure 10mL of absolute ethanol, add it to the solution,...

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Abstract

A disclosed method for using a copper sulfate waste liquid to prepare high-purity spherical copper oxide is characterized by comprising the following steps: a, injecting 25-35 wt% of hydrogen peroxide into the copper-sulfate-containing waste liquid to perform oxidation; b, adding basic copper carbonate powder into the copper sulfate solution until pH is about 3.5, standing and filtering; c, adding absolute ethanol into the copper sulfate filtrate obtained in the step b according to the volume ratio of 1:50, filtering, then adding absolute ethanol into the filtrate according to the volume ratio of 1:1, crystallizing, filtering, washing with an ethanol solution, and performing spin drying; d, dissolving copper sulfate crystal and urea in distilled water, putting in a hydro-thermal kettle to perform hydro-thermal reaction, so as to obtain copper oxide, and washing; e, drying, sintering, grinding and screening to obtain spherical copper oxide with the purity larger than 99.0%; and f, distilling an ethanol solution generated in the step c to recover ethanol. The method is less in generated wastewater, environment friendly and low in cost.

Description

technical field [0001] The invention relates to the technical field of chemical production, in particular to a method for preparing high-purity spherical copper oxide from copper sulfate waste liquid. Background technique [0002] In recent years, with the rapid development of the world's electronics industry, China's printed circuit board industry is also growing steadily, and a large amount of etching waste liquid will be produced in the printed circuit board industry. come a lot of pollution. If the waste liquid containing copper sulfate can be recovered and copper or copper compounds can be reduced from the waste liquid and used. In addition to saving a lot of costs, it can also reduce environmental pollution. [0003] At present, the methods for preparing copper oxide powder are roughly divided into solid-phase method and liquid-phase method. The solid-phase method is a method of fully mixing copper salt and alkaline substances in a certain proportion, and then calci...

Claims

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Application Information

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IPC IPC(8): C01G3/02
Inventor 范小玲王振文谢金平李宁
Owner 广东致卓环保科技有限公司
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