Preparation method of high-purity copper chloride dihydrate

A technology of copper chloride dihydrate and copper chloride, which is applied in the preparation of copper chloride, copper compounds, copper halides, etc., can solve the problems of high risk, cumbersome preparation process, and failure to meet the use requirements, and achieve high reliability , the effect of process stability

Inactive Publication Date: 2017-02-08
XILONG SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process is simple, but the quality of the prepared product is not high. It can only be used in processes with low requirements for impurities such as wood preservation and pesticides, and cannot be used in high-end technologies such as electronic components, analytical reagents, glass and ceramic mordants and other fine fields. Require
[0006] CN105236465A discloses a preparation method of high-grade pure copper chloride, soaking electrolytic copper with hydrochloric acid, adding hydrochloric acid and water, passing chlorine gas, filtering, heating and concentratin

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Add 1000kg of pure water into the reaction kettle, put in 1500kg of basic copper chloride, add hydrochloric acid to dissolve, adjust the pH=3, control the reaction temperature at 50°C, add 4.5kg of 30wt% hydrogen peroxide after dissolution, and keep warm at 50°C for 1 hour;

[0021] (2) Heat the reaction solution to boil, add 2.5kg of aluminum chloride under stirring, then adjust the pH of the reaction solution to 6.5 with basic copper chloride, keep stirring at 95°C for 2 hours, stop heating, let it stand for precipitation, and filter to get the filtrate;

[0022] (3) Add 1kg of activated carbon to the filtrate, keep stirring at 95°C for 1 hour and then filter;

[0023] (4) Adjust the pH of the filtrate to 2.5 with hydrochloric acid, concentrate and crystallize, and centrifuge to obtain high-purity copper chloride dihydrate.

[0024] The product has been tested, CuCl 2 The content is 78.49wt%, and the water content is 21.51wt%. The detection results of the main im...

Embodiment 2

[0028] (1) Add 1000kg of pure water into the reaction kettle, put in 1500kg of basic copper chloride, add hydrochloric acid to dissolve, adjust the pH=3.5, control the reaction temperature at 45°C, add 5kg of 30% hydrogen peroxide, and keep at 45°C for 1 hour;

[0029] (2) Heat the reaction solution to boil, add 2.5kg of ferric chloride under stirring, then adjust the pH of the reaction solution to 6.5 with basic copper chloride, keep stirring at 90°C for 2 hours, stop heating, let it stand for precipitation, and filter to get the filtrate;

[0030] (3) Add 1kg of activated carbon to the filtrate, keep stirring at 90°C for 1 hour and then filter;

[0031] (4) Adjust the pH of the filtrate to 2.5 with hydrochloric acid, concentrate and crystallize, and centrifuge to obtain high-purity copper chloride dihydrate.

[0032] The product has been tested, CuCl 2 The content is 78.33wt%, and the water content is 21.67wt%. The detection results of the main impurity metal ion content ar...

Embodiment 3

[0036] (1) Add 1000kg of pure water into the reaction kettle, put in 1500kg of basic copper chloride, add hydrochloric acid to dissolve, adjust the pH=3.5, control the reaction temperature at 45°C, add 5kg of 30% hydrogen peroxide, and keep warm at 45°C for 2 hours;

[0037] (2) Heat the reaction solution to boil, add 3kg of bismuth chloride under stirring, then adjust the pH of the reaction solution to 7 with copper oxide, keep stirring at 100°C for 2 hours, stop heating, let it stand for precipitation, and filter the supernatant;

[0038] (3) Add 1.25kg of activated carbon to the filtrate, keep stirring at 100°C for 2 hours and then filter;

[0039] (4) Adjust the pH of the filtrate to 2 with hydrochloric acid, concentrate and crystallize, and centrifuge to obtain high-purity copper chloride dihydrate.

[0040] The product has been tested, CuCl 2 The content is 78.63wt%, and the water content is 21.37wt%. The detection results of the main impurity metal ion content are as f...

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PUM

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Abstract

The invention discloses a preparation method of high-purity copper chloride dehydrate. According to the method, hydrochloric acid is added into a basic copper chloride solution for regulating the pH to be 2 to 4; hydrogen peroxide is added; reaction liquid is heated and boiled; chlorides of Al, Bi and Fe are added; basic copper chloride and/or copper oxide are/is used for regulating the pH to be 6.5 to 7.5; filtering is performed; activated charcoal is added into filtrate; heat insulation stirring is performed at 90 to 100 DEG C for 0.5 to 5h; then, filtering is performed; hydrochloric acid is used for regulating the filtrate until the pH is 2 to 3; concentration and crystallization are performed to obtain the high-purity copper chloride dehydrate. The preparation method has the advantages that the operation is simple; the cost is low; the environment-friendly effect is achieved; the purity of the prepared copper chloride dehydrate is high; the impurity metal ion content reaches to ppb grade.

Description

technical field [0001] The invention relates to a method for preparing high-purity copper chloride dihydrate, in particular to a method for preparing high-purity copper chloride dihydrate with limited impurities at ppb level by using industrial basic copper chloride as a copper source. Background technique [0002] Copper chloride dihydrate is mainly used as a chemical reaction catalyst, as a printing and dyeing agent and colorant in the printing and dyeing industry, as a desulfurization, deodorization and purification agent in the petroleum industry, and also as a pesticide, insecticide, wood preservative, water purification and disinfection reagents, analytical reagents and glass, ceramics, pigment production and metal extraction. [0003] At present, the preparation of copper chloride dihydrate mainly adopts the hydrochloric acid method of dissolving copper oxide, basic copper chloride or copper carbonate with hydrochloric acid. [0004] CN103241762A discloses a method f...

Claims

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Application Information

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IPC IPC(8): C01G3/05
CPCC01G3/003C01G3/05C01P2006/80
Inventor 赵策陈帆敏郑安丽陈家楷邓海英郑鹤立李金荣
Owner XILONG SCI CO LTD
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