Novel methods for preparing cobalt oxide, nickel oxide and copper oxide

A technology of copper oxide and nickel oxide, applied in the field of preparation, can solve the problem of difficulty in obtaining a product with uniform particle size distribution, such as tricobalt tetroxide, and achieve the effects of low cost, cost reduction and product cost reduction.

Active Publication Date: 2009-02-18
ZHEJIANG HUAYOU COBALT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because this method uses metal salt containing crystal water as raw material, it is easy to appear molten state during the calcination process, so that the metal salt crystal grains stick together and appear blocky, and it is difficult to obtain a product of tricobalt tetroxide with uniform particle size distribution.

Method used

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  • Novel methods for preparing cobalt oxide, nickel oxide and copper oxide
  • Novel methods for preparing cobalt oxide, nickel oxide and copper oxide
  • Novel methods for preparing cobalt oxide, nickel oxide and copper oxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1, with reference to figure 1 and 2 .

[0025] The cobalt-containing ore is used as a raw material, and after leaching and purification, a high-purity cobalt-containing 80-150 g / L cobalt chloride solution is obtained. The above cobalt chloride solution is pressure sprayed under the pressure of 0.2-5 MPa to obtain cobalt chloride mist droplets. Put the mist droplets obtained by spraying under air or oxygen atmosphere at 500-750°C for 10-40 seconds for partial dehydration to remove most of the water in the solution, followed by high temperature at 1000-1200°C The hydrolysis reaction is carried out for 20-80 seconds under high temperature, that is, the hydrolysis reaction occurs between the chloride salt of cobalt and water (and oxygen), so that it is converted from chloride salt to metal oxide, and then carried out at a high temperature of 800-950°C for 30-100 second crystal form reformation reaction, after crystal form reformation, polyhedral cobalt oxide i...

Embodiment 2

[0029] Embodiment 2, with reference to figure 1 and 3 .

[0030] The nickel-containing ore is used as a raw material, and after leaching and purification, a high-purity nickel chloride solution containing 80-150 g / L of cobalt is obtained. The above nickel chloride solution is subjected to pressure spraying under a pressure of 0.6-5 MPa to obtain nickel chloride mist droplets. Put the mist droplets obtained by spraying under air or oxygen atmosphere at 500-750°C for 10-40 seconds for partial dehydration to remove most of the water in the solution, followed by high temperature at 1000-1200°C The hydrolysis reaction is carried out for 20-80 seconds under high temperature, that is, the hydrolysis reaction of nickel chloride salt and water (and oxygen) makes it convert from chloride salt to metal oxide, and then 30-100 seconds at 800-950°C second crystal form reformation reaction, after crystal form reformation to obtain polyhedral nickel oxide, and release tail gas containing w...

Embodiment 3

[0033] Embodiment 3, with reference to figure 1 and 4 .

[0034]The copper-containing ore is used as a raw material, and after leaching and stilling, a high-purity copper chloride solution containing 80-150 g / L of cobalt is obtained. The above copper chloride solution is pressure sprayed under a pressure of 0.8-4 MPa to obtain copper chloride mist droplets. Put the mist droplets obtained by spraying under air or oxygen atmosphere at 500-750°C for 10-40 seconds for partial dehydration to remove most of the water in the solution, followed by high temperature at 1000-1200°C The hydrolysis reaction is carried out for 20-80 seconds under high temperature, that is, the hydrolysis reaction of copper chloride salt and water (and oxygen) converts it from chloride salt to metal oxide, and then it is carried out at a high temperature of 800-950°C for 30-100 Second crystal form reformation reaction, after crystal form reformation, copper oxide with polyhedral morphology is obtained, an...

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Abstract

The invention relates to a method for preparing cobalt oxide, nickel oxide and copper oxide, in particular relates to a method for preparing the oxide of the cobalt (Co3O4, Co2O3), the oxide of the nickel (NiO), the oxide of the copper (CuO), and the like. The minerals containing the cobalt, the nickel or the copper are adopted as the raw material; after the minerals is dipped and purified to get high-purity cobalt salt, nickel salt or copper salt solution; the salt solution is made into the mist-shaped liquid drop in the mist spraying way; the cobalt oxide, the nickel oxide or the copper oxide can be prepared through the dehydration, high-temperature hydrolysis and the crystal-shape re-shaping; the tail gases such as the vapor and the acid gases that are generated in the hydrolysis process are absorbed by a leaching tower to get the acid, and the acid is returned to be used for the dipping and purification process of the minerals, thereby realizing the comprehensive cycling application in the preparation process. The method can also be used for processing the waste material containing the cobalt, the nickel or the copper. The invention has the advantages of advanced process, stable production, low cost, no waste water discharging, environmental protection, high purity of the product, uniform granularity, high crystallization, and the like.

Description

technical field [0001] The present invention relates to the preparation method of cobalt, nickel, copper oxide, be specifically related to the oxide of cobalt (Co 3 o 4 、Co 2 o 3 ), nickel oxide (NiO) and copper oxide (CuO), etc. Background technique [0002] Cobalt oxides are widely used, among which tricobalt tetroxide is the key raw material for the preparation of lithium cobaltate for lithium ion batteries, and dicobalt trioxide is widely used in the production of ceramic color glazes, lightning arresters, thermistors, varistors, picture tube glass Shell and other materials. Nickel oxide and nickelous oxide are mainly used in magnetic materials, electronic component materials, coatings, ceramics and glass pigments and their catalysts. Copper oxide is a widely used inorganic material, which has been widely used in catalysts, superconducting materials, thermoelectric materials, sensing materials, glass, ceramics and other fields. [0003] Common cobalt, nickel and co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G51/04C01G53/04C01G3/02
Inventor 陈雪华刘秀庆向波徐伟
Owner ZHEJIANG HUAYOU COBALT
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