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Method for preparing basic copper chloride

A copper chloride and basic technology, applied in the field of chloride preparation, can solve problems such as increasing the production cost of basic copper chloride, shortage of raw materials for preparing basic copper chloride, and restricting the output of basic copper chloride.

Active Publication Date: 2017-12-05
叶涛
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the etching waste liquid sold to the outside world will be less and less, resulting in the shortage of raw materials for the preparation of basic copper chloride
This seriously restricts the output of basic copper chloride, and also improves the production cost of basic copper chloride

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0083] Step 1: The electrolytic cell is divided into an anode area with an anode electrode inside and a cathode area with a cathode electrode inside with an ion membrane, and an air extraction system is set above the anode area, and the exhaust port of the air extraction system leads to A reaction tank; add 26wt% sodium chloride aqueous solution as anolyte in described anode area, add clear water as catholyte in described cathode area, add 0.3wt% hydrochloric acid aqueous solution in described reaction tank And 825g copper metal powder and stir; carry out electrolytic reaction subsequently, the electric current density of electrolytic reaction is 7A / dm 2 , a total of 2 hours of electrolysis;

[0084] Step 2: diverting the gas precipitated in the anode region during the electrolysis reaction into the reaction tank through the air extraction system, so that it reacts with copper and / or copper oxide;

[0085] Step 3: mixing the liquid product of step 1 and the liquid product of ...

Embodiment 2

[0087] Step 1: The electrolytic cell is divided into an anode area with an anode electrode inside and a cathode area with a cathode electrode inside with an ion membrane. Add 26wt% sodium chloride aqueous solution in the anode area as the anolyte, add 0.01% sodium hydroxide aqueous solution in the cathode area as the catholyte; the anode area and the cathode area are respectively equipped with specific gravity automatic controllers to control the anode electrolysis respectively solution and catholyte concentration. Wherein, the specific gravity automatic controller on the cathode area is set to control the catholyte specific gravity to be 1.05g / mL, and the specific gravity automatic controller on the anode area is set to control the anolyte electrolyte specific gravity to be 1.19g / mL.

[0088] An air extraction system is arranged above the anode area, and the exhaust port of the air extraction system leads to a jet vacuum device communicated with the reaction tank; the jet vac...

Embodiment 3

[0092] Step 1: The electrolytic cell is divided into an anode area with an anode electrode inside and a cathode area with a cathode electrode inside with an ion membrane. Add 26wt% sodium chloride aqueous solution as the anolyte in the anode area, add 0.1% sodium chloride aqueous solution as the catholyte in the cathode area; the anode area is provided with a specific gravity automatic controller to control the concentration of the anolyte. The specific gravity automatic controller on the anode area is set to control the specific gravity of the anolyte electrolyte to be 1.19g / mL.

[0093] An air extraction system is established above the anode area, and the exhaust port of the air extraction system leads to a reaction tank; in the reaction tank, add 0.03wt% hydrochloric acid aqueous solution and 300g copper metal, 200g copper-zinc alloy (copper-containing 97% copper-nickel alloy), 100g copper-nickel alloy (70% copper content), 100g copper-tin alloy (90% copper content) and 100...

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PUM

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Abstract

The invention discloses a method for preparing basic copper chloride. The method comprises the following steps: 1, dividing an electrolytic tank into an anode area internally provided with an anode electrode and a cathode area internally provided with a cathode electrode by an ionic membrane, adding an aqueous sodium chloride solution as an anode electrolyte into the anode area, adding a water-containing cathode electrolyte into the cathode area, and carrying out an electrolytic reaction, wherein a water electrolysis reaction occurs on the anode electrode in the electrolytic tank; 2, reacting a product obtained in the anode area through the electrolytic reaction with copper and / or copper oxide; and 3, mixing an electrolytic product in the cathode area in step 1 with a reaction product in step 2 until the pH value is 3-7 in order to obtain a solid and liquid mixture, and carrying out solid-liquid separation on the solid and liquid mixture to obtain the basic copper chloride solid. The method has the advantages of simple process and low production cost.

Description

technical field [0001] The invention relates to a method for preparing copper chloride, in particular to a method for preparing basic copper chloride. Background technique [0002] Basic copper chloride (Cu 4 (OH) 6 Cl 2 ) is widely used in pesticides, medicines, wood preservatives, and feed additives, and is an important chemical raw material. Traditional basic copper chloride is mainly obtained by reacting copper chloride and sodium hydroxide solution at normal temperature and pressure. In order to prepare copper chloride, it is necessary to use high-concentration hydrochloric acid to react with copper. During this process, a large amount of acid mist and chlorine gas will be generated, which will cause great pollution to the environment. [0003] At present, a main preparation method of basic copper chloride is to mix and neutralize the acidic copper chloride etching waste liquid generated in the production process of printed circuit boards with alkaline copper chlori...

Claims

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Application Information

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IPC IPC(8): C01G3/05C25B1/46
CPCC01G3/05C25B1/46
Inventor 叶涛
Owner 叶涛
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