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A preparation method for producing high-purity copper powder and recovering crystalline aluminum chloride by using copper chloride-containing waste etching solution

A technology for crystallizing aluminum chloride and waste etching solution, applied in aluminum chloride, aluminum halide and other directions, can solve the problems of complex process, high energy consumption, low efficiency, etc., and achieves simple production process, no increase in liquid volume, economical good effect

Active Publication Date: 2020-10-30
广东智升环境技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a preparation method for producing high-purity copper powder and recovering crystalline aluminum chloride by using copper chloride-containing waste etching liquid, which can overcome the deficiencies of the prior art and can solve the problem of the treatment and disposal of hazardous waste copper-containing waste liquid In the process, there are problems such as low direct recovery rate of copper metal, long production process, complicated process, low efficiency, large energy consumption, and high disposal cost

Method used

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  • A preparation method for producing high-purity copper powder and recovering crystalline aluminum chloride by using copper chloride-containing waste etching solution
  • A preparation method for producing high-purity copper powder and recovering crystalline aluminum chloride by using copper chloride-containing waste etching solution

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Embodiment 1

[0023] Example 1, such as figure 1 Shown, a kind of preparation method that produces high-purity copper powder and reclaims crystalline aluminum chloride with copper chloride waste etchant, it comprises the following steps successively.

[0024] S101, pretreatment: the collected acidic copper chloride-containing waste etching solution is input into the reaction tank, and then in each liter of acidic copper chloride-containing waste etching solution, 1.6 g of hydrogen peroxide with a mass fraction of 27.5% and the purity of aluminum oxide of 63 120g of aluminum hydroxide was stirred for neutralization reaction, and then PAM was added until the pH of the solution was controlled at 3.5 to obtain an acidic neutralization solution.

[0025] S102. Flocculation and impurity removal: Add anionic polyacrylamide flocculant to the acidic neutralization solution. The anionic polyacrylamide flocculant is a commercially available 12 million anionic polyacrylamide, stirred and dissolved with...

Embodiment 2

[0035] Embodiment 2: a kind of preparation method that produces high-purity copper powder and reclaims crystalline aluminum chloride with copper chloride waste etchant, it comprises the following steps successively.

[0036] S101, pretreatment: input the collected acidic copper chloride-containing waste etching solution into the reaction tank, and then add 2 g of hydrogen peroxide with a mass fraction of 20% to each liter of acidic copper chloride-containing waste etching solution, and the purity of aluminum oxide is 85% 150g of aluminum hydroxide was stirred for neutralization reaction, and then PAM was added until the pH of the solution was controlled at 3 to obtain an acidic neutralization solution.

[0037] S102. Flocculation and impurity removal: add anionic polyacrylamide flocculant to the acidic neutralization solution, the anionic polyacrylamide flocculant is commercially available 8 million anionic polyacrylamide, stirred and dissolved with water to form a 0.5g / L solut...

Embodiment 3

[0044] Embodiment 3: a kind of preparation method that produces high-purity copper powder and reclaims crystalline aluminum chloride with copper chloride waste etchant, it comprises the following steps successively.

[0045] S101, pretreatment: input the collected acidic copper chloride-containing waste etching solution into the reaction tank, then add 1 g of hydrogen peroxide and 150 g of aluminum oxide with a mass fraction of 30% to each liter of acidic copper chloride-containing waste etching solution and stir for neutralization reaction, and then add PAM until the pH of the solution is controlled at 3.8 to obtain an acidic neutralizing solution.

[0046] S102. Flocculation and impurity removal: add anionic polyacrylamide flocculant to the acidic neutralization solution, the anionic polyacrylamide flocculant is commercially available 9.5 million anionic polyacrylamide and stir it with water to form a 0.35g / L solution; anionic polyacrylamide The amount of flocculant added is...

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Abstract

The invention discloses a preparation method for manufacturing high-purity copper powder through waste etching liquid containing copper chloride and recycling crystalline aluminum chloride. The preparation method sequentially comprises the following steps of S101, conducting pretreatment, wherein the collected acid waste etching liquid containing the copper chloride is input into a reaction tank,hydrogen peroxide and aluminum hydroxide are added and stirred to conduct a neutralization reaction, the pH is controlled to be 3-3.8, an appropriate amount of PAM is added, and the pretreatment is completed; S102, conducting flocculation impurity removal; S103, conducting replacement, wherein sedimentation residual liquid obtained after flocculation impurity removal is pumped into a specially-made reaction tank, and aluminum sheets are added to conduct a replacement reaction; S104, manufacturing the product, wherein the procedure of purifying and drying copper power and aluminum chloride andthe procedure of recycling and producing the crystalline aluminum chloride are conducted. By the adoption of the preparation method for manufacturing the high-purity copper powder through the waste etching liquid containing copper chloride and recycling the crystalline aluminum chloride, the production technical process is simple, the liquid amount is not increased, the recovery rate of copper ishigher than 99.9%, residual liquid waste water is evaporated and concentrated and then used for producing the crystalline aluminum chloride product high in value, the material consumption is less, theefficiency is high, the economic benefit is good, and the effect of recycling, harmless and environment-friendly treatment of the dangerous waste, the waste liquid containing copper, is achieved.

Description

technical field [0001] The invention relates to a preparation method for preparing high-purity copper powder and recovering crystalline aluminum chloride by using waste etching solution containing copper chloride, and belongs to the technical field of environmental protection disposal of hazardous waste. Background technique [0002] At present, in the domestic hazardous waste copper-containing waste liquid treatment and disposal process, the traditional acid-base neutralization method is generally used to produce industrial-grade copper sulfate pentahydrate or basic copper chloride. This copper-containing waste liquid treatment and disposal process There are the following deficiencies; the direct recovery rate of copper metal is low, only about 90%, the production process is long and complicated, and the process wastewater is produced in a large amount and contains heavy metals. The process wastewater needs secondary treatment to remove heavy metals, and then evaporates and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/00C22B15/14C01F7/56
CPCC01F7/56C22B7/006C22B15/001C22B15/0091
Inventor 黄林生陈西安邓华进
Owner 广东智升环境技术有限公司
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