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Method for preparing copper chloride dihydrate by alkaline type copper chloride

A technology of copper chloride dihydrate and copper chloride, applied in the direction of copper chloride, copper halide, etc., can solve the problems of unsuitable for large-scale production, cumbersome reaction steps, high production cost, etc., achieve improved production efficiency, simple preparation method, low cost effect

Active Publication Date: 2013-08-14
嘉兴德达资源循环利用有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its main raw material is copper oxide with certain purity requirements, so the production cost is high and the efficiency is low
[0004] In addition, there is also a scheme of using copper as the starting material to prepare copper chloride dihydrate. This scheme will produce cuprous chloride, so the reaction steps are cumbersome, and the cost is high and the efficiency is low. It is not suitable for industrialized large-scale production.

Method used

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  • Method for preparing copper chloride dihydrate by alkaline type copper chloride

Examples

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Comparison scheme
Effect test

Embodiment 1

[0029] A method for preparing copper chloride dihydrate using basic copper chloride, comprising:

[0030] (1) Add 2m 3 Concentration is 27% hydrochloric acid, start to stir, then add 1.5t concentration to be 55% basic copper chloride in hydrochloric acid. After 20-40 minutes of feeding, take a sample to detect free hydrogen chloride, and the concentration of free hydrogen chloride needs to be controlled at 0.8%-8%. At the same time, the above-mentioned additions need to be completely dissolved without sediment.

[0031] (2) After the feeding is completed, the test is qualified, and the vacuum distillation is started for 8-10 hours. The selected vacuum degree is -0.05Mpa. When the material is steamed to a thick slurry and the surface has large bubbles, the evaporation is over, and the steam valve of the reactor is closed. Cooling water, lowering the temperature to 40°C, putting the feed liquid into a filter barrel, filtering the mother liquor, and centrifuging for 40 minutes ...

Embodiment 2

[0033] A method for preparing copper chloride dihydrate using basic copper chloride, comprising:

[0034] (1) Add 1.4m 3 Concentration of 32% hydrochloric acid, start stirring, vacuumize to make the vacuum degree -0.05Mpa, then add 1.4t of basic copper chloride with a concentration of 58% to the hydrochloric acid. After 20-40 minutes of feeding, take a sample to detect free hydrogen chloride, and the concentration of free hydrogen chloride needs to be controlled at 0.8%-8%. At the same time, the above-mentioned additions need to be completely dissolved without sediment.

[0035] (2) After the feeding is completed, the test is qualified, and the vacuum distillation is started for 8-10 hours. The selected vacuum degree is -0.12Mpa. When the material is steamed to a thick slurry and the surface has large bubbles, the evaporation is over, and the steam valve of the reactor is closed. Cooling water, lowering the temperature to 45°C, putting the feed liquid into a filter barrel, f...

Embodiment 3

[0037] A method for preparing copper chloride dihydrate using basic copper chloride, comprising:

[0038] (1) Add 1.9m 3 Concentration of 28% hydrochloric acid, start stirring (rotational speed 700-1000r / min), vacuumize to make the vacuum degree -0.10Mpa, then add 1.6t basic copper chloride with a concentration of 54% to the hydrochloric acid. After 20-40 minutes of feeding, take a sample to detect free hydrogen chloride, and the concentration of free hydrogen chloride needs to be controlled at 0.8%-8%. At the same time, the above-mentioned additions need to be completely dissolved without sediment.

[0039] (2) After the feeding is completed, the test is qualified, and the vacuum distillation is started for 8-10 hours. The selected vacuum degree is -0.12Mpa. When the material is steamed to a thick slurry and the surface has large bubbles, the evaporation is over, and the steam valve of the reactor is closed. Cool water, lower the temperature to 30°C, put the feed liquid int...

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Abstract

The invention provides a method for preparing copper chloride dihydrate by alkaline type copper chloride. The method comprises the steps of: (1) stirring hydrochloric acid, adding alkaline type copper chloride into the hydrochloric acid, controlling the concentration of free hydrogen chloride at 0.8-8% for 20-40min, and completely dissolving the added material till no sediment exists; and (2) carrying out negative pressure distillation to the material completely dissolved in the step (1) for 8-10 hours, and cooling and crystallizing after finishing evaporation, filtering, centrifuging and separating to obtain copper chloride dihydrate. The alkaline type copper chloride is adopted as an initial raw material, not only can the production efficiency be improved, but also the production cost can be lowered; copper hydroxide contained in the alkaline type copper chloride more easily reacts with hydrochloric acid, and the consumption of the hydrochloric acid can be more effectively reduced through the copper chloride component; and the preparation method is simple, low in cost, higher in efficiency by 20-30% compared with the existing method, thus being suitable for industrialized production.

Description

technical field [0001] The invention relates to the technical field of preparation of copper chloride dihydrate, in particular to a method for preparing copper chloride dihydrate by using basic copper chloride. Background technique [0002] Copper chloride dihydrate has a wide range of uses, such as glass, ceramics, pigments, disinfectants, mordants, food additives, catalysts, etc., metal refining, wood preservation, photography, oxidants, water purification, etc. [0003] The current method of producing copper chloride dihydrate is to react copper oxide with hydrochloric acid, then concentrate and crystallize to obtain the finished product. Its main raw material is copper oxide with certain purity requirements, so the production cost is high and the efficiency is low. [0004] In addition, there is also a scheme of using copper as the starting material to prepare copper chloride dihydrate, which will produce cuprous chloride, so the reaction steps are cumbersome, and the c...

Claims

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Application Information

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IPC IPC(8): C01G3/05
Inventor 金正新万光文
Owner 嘉兴德达资源循环利用有限公司
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