Method for producing copper chloride by using waste acidic etching liquid

A technology of acid etching solution and copper chloride, which is applied in the direction of copper chloride and copper halide, can solve the problems of high solid waste treatment cost, danger and consumption of waste acid etching solution, reduce solid waste treatment cost, increase copper Effect of ion concentration and reduction of production cost

Pending Publication Date: 2021-06-11
湖北林泰环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] The purpose of the present invention is to provide a method for producing copper chloride by using waste acid etching solution, so as to solve the problem that waste acid etching solution in the prior art is a dangerous solid waste, which needs to be disposed of by a professional company and requires high solid waste treatment costs. technical issues

Method used

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  • Method for producing copper chloride by using waste acidic etching liquid

Examples

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Comparison scheme
Effect test

Embodiment 1

[0055]A method utilizing waste acid etching solution to produce copper chloride comprises the steps:

[0056] (1) Deacidification and purification

[0057] ① Add 10kg of waste circuit board copper powder to 100Kg of waste acid etching solution produced during the etching process of printed circuit boards, and stir for 1 hour at a stirring rate of 60 rpm;

[0058] ② Then add 5Kg of hydrogen peroxide, and continue to stir and react at a stirring rate of 60 rpm for 1 hour to obtain a reaction solution, the pH of which is 1-2;

[0059] ③ Continue to stir at a stirring rate of 60 rpm, add 30% sodium hydroxide to adjust the pH of the reaction solution to 3.5;

[0060] ④Continue to stir at a stirring rate of 60 rpm, then slowly add 1.5Kg of 0.2% polyacrylamide flocculant, and react for 0.3h; obtain a reaction mixture containing copper chloride;

[0061] (2) Solid-liquid separation

[0062] The reaction mixture obtained in step (1) is subjected to solid-liquid separation, and a box...

Embodiment 2

[0071] A method utilizing waste acid etching solution to produce copper chloride comprises the steps:

[0072] (1) Deacidification and purification

[0073] ① Add 15kg of waste circuit board copper powder to 100Kg of waste acid etching solution produced during the etching process of printed circuit boards, and stir for 2 hours at a stirring rate of 65 rpm;

[0074] ② Then add 8Kg of hydrogen peroxide, and continue to stir and react at a stirring rate of 65 rpm / min for 1 hour to obtain a reaction solution, the pH of which is 1-2;

[0075] ③Continue to stir at a stirring rate of 65 rpm, and add 30% sodium hydroxide to adjust the pH of the reaction solution to 3.8;

[0076] ④Continue to stir at a stirring rate of 65 rpm, then slowly add 1.2Kg of 0.5% flocculant, and react for 0.3h; obtain a reaction mixture;

[0077] (2) Solid-liquid separation

[0078] The reaction mixture obtained in step (1) is subjected to solid-liquid separation, and the solid-liquid separation adopts a b...

Embodiment 3

[0087] A method utilizing waste acid etching solution to produce copper chloride comprises the steps:

[0088] (1) Deacidification and purification

[0089] ① Add 8 kg of waste circuit board copper powder to 100 kg of waste acid etching solution produced during the etching process of printed circuit boards, and stir for 3 hours at a stirring rate of 55 rpm;

[0090] ②Then add hydrogen peroxide in an amount of 6Kg, and continue to stir and react at a stirring rate of 55 rpm for 1 hour to obtain a reaction solution, the pH of which is 1-2;

[0091] ③Continue to stir at a stirring rate of 55 rpm, and add 30% sodium hydroxide to adjust the pH of the reaction solution to 3.6;

[0092] ④Continue to stir at a stirring rate of 55 rpm, then slowly add 1.1Kg of 0.6% flocculant, and react for 0.3h; obtain a reaction mixture containing copper chloride;

[0093] (2) Solid-liquid separation

[0094] The reaction mixture that step (1) obtains is carried out solid-liquid separation, and th...

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Abstract

The invention provides a method for producing copper chloride by using waste acidic etching liquid, and solves the technical problems that the waste acidic etching liquid belongs to dangerous solid waste and needs to be treated and recycled by professional companies, and high solid waste treatment cost needs to be consumed in the prior art. The method comprises the following steps: (1) deacidification purification; (2) solid-liquid separation; (3) evaporation and concentration; (4) crystallizing; and (5) solid-liquid separation. According to the method, all the used main raw materials are from dangerous solid wastes generated in the electronic industry, so that the method is an energy-saving and environment-friendly resource regeneration cycle path, is small in investment, low in cost, environment-friendly and capable of realizing cyclic regeneration, can reduce the solid waste treatment cost of the waste acidic etching liquid, and can produce copper chloride.

Description

technical field [0001] The invention relates to a method for producing copper chloride by using waste acid etching solution. Background technique [0002] Copper chloride, the chemical formula is CuCl 2 , is a yellow-brown powder with a relative density of 3.386 (25°C), a melting point of 620°C, and a solubility of 70.6 at 0°C. It is also easily soluble in ethanol and acetone. Easy to absorb moisture from the air and turn into blue-green dihydrate CuCl 2 2H 2 O is a green orthorhombic crystal with deliquescent properties and a relative density of 2.38. It can be prepared by passing chlorine gas and water into a contact tower filled with metal copper, or by the action of copper carbonate (actually basic copper carbonate) and hydrochloric acid. Pick. Copper chloride is used as a chemical reagent, mordant, oxidizing agent, wood preservative, food additive, disinfectant, and for making glass, ceramics, pyrotechnics, invisible ink, and also for deodorization and desulfurizati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G3/05C23F1/46
CPCC01G3/05C23F1/46
Inventor 王勇智权平王梦杨
Owner 湖北林泰环境科技有限公司
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