Method for producing copper sulphate by using copper-containing waste solution of PCB circuit board plant

A PCB circuit board and copper sulfate technology, applied in the direction of copper sulfate, etc., can solve the problems of many impurities, large amount of waste water, instability, etc., and achieve the effect of improving product quality, reducing sulfuric acid consumption, and reducing waste water amount

Inactive Publication Date: 2015-12-09
QINGYUAN XINLV ENVIRONMENTAL TECHNOLOGY CO LTD
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. Copper hydroxide is in the form of slurry, and it is difficult to wash with water. In order to ensure product quality, it is necessary to increase the amount of washing water, resulting in a large amount of waste water;
[0005] 2. Copper hydroxide is used as an intermediate, and there are many impurities in copper hydroxide, which affects product quality, and the product quality is poor and unstable;
[0006] 3. Contains some organic matter, consumes part of sulfuric acid during acidification, resulting in high acid consumption

Method used

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  • Method for producing copper sulphate by using copper-containing waste solution of PCB circuit board plant

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Experimental program
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Effect test

Embodiment 1

[0032] Refer to attached figure 1

[0033] The method for producing copper sulfate with the copper-containing waste liquid of PCB circuit board factory comprises the steps:

[0034] S1. Removing impurities from copper-containing waste liquid

[0035] Put 15 tons of copper-containing waste liquid with a copper ion concentration of 8% in a reaction tank for removing impurities, take 2 kg of industrial barium carbonate and 5 kg of activated carbon powder and add them to the reaction tank for removing impurities, and adjust the concentration of copper-containing waste liquid with copper ammonia or ammonia water. The pH value of the copper waste liquid, so that the pH value is in the range of 1.0 to 1.5, 5 kg of potassium permanganate solution with a concentration of about 0.2% is added, and after stirring for 1 hour, the solution in the impurity removal reaction tank is filtered through a filter press to solidify Liquid separation, so that impurities are separated in the form of...

Embodiment 2

[0047] The method for producing copper sulfate with the copper-containing waste liquid of PCB circuit board factory comprises the steps:

[0048] S1. Removing impurities from copper-containing waste liquid

[0049] Put 15 tons of copper-containing waste liquid with a copper ion concentration of 9% in a reaction tank for removing impurities, take 3kg of industrial barium carbonate and 6kg of activated carbon powder and add them to the reaction tank for removing impurities, and adjust the concentration of copper-containing waste liquid with copper ammonia or ammonia water. The pH value of the copper waste liquid, so that the pH value is in the range of 1.0 to 1.5, 6 kg of potassium permanganate solution with a concentration of about 0.3% is added, and after stirring for 1 hour, the solution in the impurity removal reaction tank is filtered through a filter press. Liquid separation, so that impurities are separated in the form of solids, and the purified copper chloride solution ...

Embodiment 3

[0061] The method for producing copper sulfate with the copper-containing waste liquid of PCB circuit board factory comprises the steps:

[0062] S1. Removing impurities from copper-containing waste liquid

[0063] Put 15 tons of copper-containing waste liquid with a copper ion concentration of 8.5% in a reaction tank for removing impurities, take 2.5 kg of industrial barium carbonate and 5.4 kg of activated carbon powder and add them to the reaction tank for removing impurities, and use copper ammonia solution or ammonia water Adjust the pH value of the copper-containing waste liquid so that the pH value is in the range of 1.0 to 1.5, add 6 kg of potassium permanganate solution with a concentration of about 0.15%, stir for 1 hour, and filter the solution in the impurity removal reaction tank through a filter press , solid-liquid separation, so that impurities are separated in the form of solids, and the purified copper chloride solution is used for standby;

[0064] S2, copp...

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Abstract

A method for producing copper sulphate by using a copper-containing waste solution of a PCB circuit board plant comprises the following steps: removing impurities of the copper-containing waste solution, removing impurities of a cuprammonium waste solution, preparing wet alkaline copper, preparing a slurry from wet alkaline copper and an alkaline copper mother solution or tap water, acidifying, cooling, crystallizing, and purifying. In the method, copper oxychloride is taken as an intermediate, because copper oxychloride is in the state of a particle, copper hydroxide is in the state of a slurry and synthesis of copper oxychloride is under a high-temperature condition, when solid-liquid separation is performed, separation of the copper oxychloride intermediate from impurities, oil stains and the like is relatively thorough. In the subsequent technological flow, influence of impurities on the copper sulphate product quality is reduced, under the circumstance of guaranteeing product quality, the pH value of the acidification terminal point is 1.0-1.5, and the terminal-point acidity is obviously raised compared with an original technology (pH: 0-0.3). By using the method, the wastewater quantity is reduced, product quality is improved, and sulfuric acid consumption is reduced.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a method for producing copper sulfate with copper-containing waste liquid from a PCB circuit board factory. Background technique [0002] Using copper-containing waste liquid and copper ammonia waste liquid from PCB circuit board factory as raw materials, neutralize and filter to obtain copper hydroxide (more impurities), after washing, use copper hydroxide as an intermediate, mix with copper sulfate mother liquor and tap water , after mixing the slurry according to a certain ratio, carry out acidification, cooling and crystallization to obtain copper sulfate pentahydrate crystals. [0003] This method has the following disadvantages: [0004] 1. Copper hydroxide is in the form of slurry, and it is difficult to wash with water. In order to ensure product quality, it is necessary to increase the amount of washing water, resulting in a large amount of waste water; [0005] 2. Cop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G3/10
Inventor 蒋联武
Owner QINGYUAN XINLV ENVIRONMENTAL TECHNOLOGY CO LTD
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