Method for producing hydroxy cobalt oxide

A technology of cobalt oxyhydroxide and production method, which is applied in the direction of cobalt oxide/cobalt hydroxide, etc., which can solve the problems of uncontrollable particle size and shape, uneven distribution of product particles, and difficult treatment of ammonia nitrogen waste, so as to improve the utilization rate of equipment and work efficiency, good consistency, and controllable production process

Inactive Publication Date: 2012-09-26
湖南红太阳电源新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1. The precipitant used is carbonate, and the ammonia nitrogen waste generated in the production process is difficult to handle and easy to pollute the environment
[0004] 2. Adopt the intermittent production mode of one tank and one tank, and cannot produce continuously
[0005] 3. The particle distribution of the product is uneven, the particle size and shape cannot be controlled, the consistency is poor, and the quality is unstable

Method used

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  • Method for producing hydroxy cobalt oxide
  • Method for producing hydroxy cobalt oxide

Examples

Experimental program
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Effect test

Embodiment 1

[0028] The production steps are as follows:

[0029] 1. Preparation of cobalt sulfate solution

[0030] When the cobalt content control index of the cobalt solution to be prepared is 80g / l, in the rated volume of 10m 3 Add cobalt sulfate solution raw material 8m of cobalt content to be 100g / l in the preparation tank of 3 , turn on the stirring blade, add pure water to the rated volume elevation of the preparation tank, stir for 5 to 10 minutes, add hydrochloric acid, adjust the pH value of the solution to 3.5, take samples to analyze the cobalt content, and add the additive EDTA according to the ratio of cobalt:EDTA=100:2 , and then pumped into the high-level cobalt liquid storage tank.

[0031] 2. Preparation of sodium hydroxide solution

[0032] When the lye concentration control index to be prepared is 8mol, in the rated volume of 10m 3 Add 6.67m of sodium hydroxide solution when the concentration is 12mol in the preparation tank 3 , turn on the stirring blade, add pur...

Embodiment 2

[0040] The production step 1 of this example is basically the same as that of Example 1, except that the following parameters are different: the cobalt content control index of the cobalt sulfate solution to be prepared is 75g / l, and adding cobalt sulfate 8.33m of cobalt content of 90g / l in the preparation tank 3 , adjust the pH value of the solution to 3.0, and add the additive EDTA according to cobalt: EDTA=100: 1.

[0041] The production step 2 of this example is basically the same as that of Example 1, except that the following parameters are different: the alkali concentration control index to be prepared is 7mol, and adding a concentration of 10mol of sodium hydroxide solution 7m in the preparation tank 3 .

[0042] The production step 3 of this example is basically the same as embodiment one, only following parameters are different: the flow of cobalt sulfate solution is 100L / h, the flow of sodium hydroxide solution is 60L / h, and the air flow is 8m 3 / h.

[0043] The ...

Embodiment 3

[0045] The production step 1 of this example is basically the same as that of Example 1, only the following parameters are different: the cobalt content control index of the cobalt sulfate solution to be prepared is 85g / l, and adding cobalt sulfate 7.73m of cobalt content in the preparation tank is 110g / l 3 , adjust the pH value of the solution to 4.5, and add the additive EDTA according to cobalt: EDTA=100:3.

[0046]The production step 2 of this example is basically the same as that of Example 1, except that the following parameters are different: the alkali concentration control index to be prepared is 9mol, and adding a concentration of 15mol of sodium hydroxide solution 6m in the preparation tank 3 .

[0047] The production step 3 of this example is basically the same as embodiment one, only following parameters are different: the flow of cobalt sulfate solution is 500L / h, the flow of sodium hydroxide solution is 350L / h, and the air flow is 15m 3 / h.

[0048] The produc...

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Abstract

The invention discloses a method for producing hydroxy cobalt oxide, comprising the following steps of: firstly, preparing a cobaltous sulfate solution with cobalt content of 75-85g/l; adjusting a pH value of the solution to be 3.0-4.5; adding EDTA (Ethylene Diamine Tetraacetic Acid) into the solution according to the proportion of cobalt to EDTA of 100:(1-3); preparing sodium hydroxide solution with alkali concentration of 7-9mol; performing cocurrent flow on two solutions and flowing into a reaction groove; introducing the air for performing synthetic reaction; controlling the reaction temperature to be between 50 and 70 and a pH value to be between 10.0 and 12.0 for reacting for 15-25 hours; flowing into an aging groove for aging for 50-60 minutes; and finally, filtering, washing and slurrying to prepare a hydroxy cobalt oxide solid product. According to the method, the production process is controllable, particles of the product are uniformly distributed with good consistency, the shape is spherical and the product has good dispersibility; and the production process is free of ammonia nitrogen pollution, so that continuous production is realized, and the equipment utilization rate and the production efficiency are improved.

Description

technical field [0001] The invention relates to a method for producing a new material, in particular to a method for producing cobalt oxyhydroxide used in manufacturing industries such as battery materials, catalysts, magnetic materials, electronic materials, and hard alloys. . Background technique [0002] Cobalt oxyhydroxide is mainly used to manufacture high-quality cobalt trioxide, which lays a solid raw material foundation for the production of high-quality batteries with long cycle life. The existing production process has the following defects: [0003] 1. The precipitating agent used is carbonate, and the ammonia nitrogen waste generated in the production process is difficult to handle and easily pollutes the environment. [0004] 2. Adopt the intermittent production method of one tank and one tank, and cannot produce continuously. When the material reaches a certain height in the reaction tank and the various process conditions are met, the material in the tank c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G51/04
Inventor 韦承僚张晓华周红阳
Owner 湖南红太阳电源新材料股份有限公司
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