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Method for continuously preparing cobalt hydroxide with high bulk density

A technology of cobalt hydroxide and pine ratio, applied in cobalt oxide/cobalt hydroxide and other directions, can solve the problems of long production process, unfavorable industrial production, harsh drying conditions, etc., and achieves convenient operation, is conducive to industrial production, and has excellent products. Effect

Active Publication Date: 2013-10-09
ZHEJIANG HUAYOU COBALT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has a long production process and harsh drying conditions, which is not conducive to industrialized production

Method used

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  • Method for continuously preparing cobalt hydroxide with high bulk density
  • Method for continuously preparing cobalt hydroxide with high bulk density

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Using NaOH as the bottom liquid, add 60g / L NaOH, 100g / L cobalt chloride, and 12g / L polyvinyl alcohol solution into the reactor in parallel, and quickly control the pH value at 10.0 and the temperature at 30-90°C during the process , stirring speed 200 ~ 1000rpm, after 6 ~ 40h of reaction, open the overflow valve and start continuous production. Add appropriate amount of glucose to the overflowing reaction material, and age for 2-4 hours. Cobalt hydroxide can be obtained after filtering, washing and drying.

Embodiment 2

[0022] Using NaOH as the bottom liquid, mix 250g / L NaOH with 25g / L disodium ethylenediaminetetraacetic acid solution, and add 150g / L cobalt chloride into the reactor in parallel flow, and quickly control the pH value at 10.5 during the process. The temperature is controlled at 30-90° C., the stirring speed is 200-1000 rpm, and after 6-40 hours of reaction, the overflow valve is opened to start continuous production. Add an appropriate amount of ascorbic acid to the overflowing reaction material, and age for 2 to 4 hours. Cobalt hydroxide can be obtained after filtering, washing and drying.

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Abstract

The invention discloses a method for continuously preparing cobalt hydroxide with high bulk density. The current cobalt hydroxide preparation methods include an alkali solution sedimentation method, a sedimentation conversion method and the like which have the following three difficulties: cobalt hydroxide sedimentation particles are smaller, difficult to filter and wash, and the recovery rate of materials is low; the materials are low in quality and high in impurity content; the high energy consumption is caused by intermittent production. The technical scheme is as follows: the method is characterized by comprising the following steps of: with cobalt-contained ore material as the raw material, leaching the cobalt-contained ore material, and then, purifying the cobalt-contained ore material to obtain a cobalt chloride solution; with NaOH as a base solution, merging NaOH, cobalt chloride and a complexing agent solution, adding the mixed solution into a reaction kettle, rapidly controlling the pH value at 8-12, the temperature at 30-90 DEG C and the stirring speed at 200-1000rpm in the flow merging process, and opening an overflow valve of the reaction kettle to begin to carry out continuous production after the reaction is carried out for 6-40h. The method is simple in process, capable of realizing continuous production, convenient in operation and beneficial to the industrial production; a product is excellent and is shaped like a porous sphere, and the particle size of the product is distributed normally.

Description

technical field [0001] The invention relates to a method for continuously preparing high-pine ratio cobalt hydroxide. Background technique [0002] Cobalt hydroxide is an important industrial raw material. It is used in chemical production to manufacture cobalt salts, cobalt-containing catalysts and electrolytic methods to produce hydrogen peroxide decomposers. It is used as paint drier in paint industry and colorant in glass lining industry. The battery industry is used to manufacture MH-Ni, lithium-ion batteries. With the rapid development of my country's economy and society, green energy is favored by people, the battery industry continues to develop at a high speed, and the application fields of cobalt hydroxide continue to expand, and the market demand is also increasing. [0003] The existing methods for preparing cobalt hydroxide include alkali solution precipitation method, precipitation transformation method and the like. There are three problems in the production...

Claims

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Application Information

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IPC IPC(8): C01G51/04
Inventor 徐伟田礼平刘茨梅王宁
Owner ZHEJIANG HUAYOU COBALT
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