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Process for preparing cobalto cobaltic oxide

A technology of tricobalt tetroxide and a manufacturing method, which is applied in the directions of cobalt oxide/cobalt hydroxide, electrical components, battery electrodes, etc., can solve the problems of long process, difficult washing and filtering product particle size, and battery raw materials can not meet the requirements, etc. The effect of low cost and wide source of raw materials

Inactive Publication Date: 2005-09-14
许光惠 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The manufacture method of tricobalt tetroxide has many kinds, and for example the patent No. is the Japanese patent of JP10324523, and its method for producing tricobalt tetroxide is to make cobalt salt aqueous solution generate cobaltous hydroxide suspension with excessive alkali aqueous solution, then blow oxygen-containing gas or add hydrogen peroxide Oxidize wherein cobalt is trivalent cobalt, form cobalt hydroxide, and then make tricobalt tetroxide, this method process is tedious, and washing and filtering are very difficult (because cobalt hydroxide is fine little colloidal precipitation) and the obtained product particle size is very fine, can't be used for specific purpose
The battery raw materials produced by general manufacturing methods can no longer meet the requirements, so we researched and invented this patented technology

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Weigh 2.0kg of cobaltous oxide and place it in a roasting furnace, seal the roasting furnace tightly with a lid, evacuate to below 0.06MP with a vacuum pump, and then pump again. Feed nitrogen gas to the water seal of the small hole at the furnace outlet, and there are countable bubbles coming out. The temperature was raised to 480°C. Pass into hydrogen, and its flow rate is 100-120ml / min. In order to maintain positive pressure, the hydrogen outlet has a water column about 150mm high. After 2-2.5h, stop feeding hydrogen. Use nitrogen to drive out hydrogen, open the airtight door to allow air to enter, at this time the oxidation reaction starts, stir once after a period of time, until 2-3h later. The reaction is complete. Take it out of the furnace and cool to room temperature, and classify with a classifier to obtain 1.94kg of cobalt tetroxide and 0.12kg of fine powder. The total yield is more than 95%. The resulting fine powder is used to produce cobaltous oxide....

Embodiment 2

[0016] Weigh 2.0 kg of cobaltous hydroxide and place it in a roasting furnace, seal the furnace tightly with a lid, evacuate to below 0.06MP, and pump again, and pass nitrogen gas until nitrogen bubbles emerge. The temperature was raised to 450°C. Introduce hydrogen gas at a flow rate of 80-100ml / min. The water column at the hydrogen outlet is about 150mm high. After ventilating for 2-3 hours, stop feeding hydrogen, pass nitrogen to drive out hydrogen, and open the airtight door. Let the air in. After 2-3 hours, it will come out of the oven. After grading, 1.60 kg of cobalt tetroxide and 0.07 kg of fine powder were obtained. The same test met the requirements for producing lithium batteries.

Embodiment 3

[0018] Weigh 50.0g of cobalt carbonate and place it in the roasting furnace, seal the roasting furnace tightly with a lid, evacuate to below 0.06MP with a vacuum pump, and then pump again. Feed nitrogen gas to the water seal of the small hole at the furnace outlet, and there are countable bubbles coming out. The temperature was raised to 500°C. Introduce hydrogen gas at a flow rate of 80-100ml / min. The hydrogen outlet has a water column about 150mm high. After 2-3h, stop feeding hydrogen. Pass nitrogen to drive out the hydrogen, open the airtight door, let the air enter, and then come out of the furnace after 2-3 hours. After classification, 30.5g of tricobalt tetroxide and 1.94g of fine powder are obtained. After testing, it meets the requirements for the production of lithium batteries.

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PUM

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Abstract

This invention is a production method of cobalto cobaltic oxide. Salts, oxide, hydroxide that with cobalt: cobaltous chloride, cobaltous sulfate, cobaltous carbonate, cobalt acetate, citric acid cobalt and all kinds of organic acid cobalt: cobaltous oxide, oxy hydrogen, cobaltous hydroxide are deacidized to metal cobalt powder by hydrogen, hydrogen and nitrogen or carbon monoxide. Then cobalt powder is oxidized to cobalto cobaltic oxide product through air or oxygen. The feature is that the oxidation and reduction process are integer, filtration, scrubbing and baking and other processes generated by liquid phase precipitation method is avoided absolutely. It is absolute dry method with few time, effort and low cost.

Description

technical field [0001] The invention belongs to, and in particular relates to a manufacturing method of tricobalt tetroxide. Background technique [0002] The manufacture method of tricobalt tetroxide has many kinds, and for example the patent No. is the Japanese patent of JP10324523, and its method for producing tricobalt tetroxide is to make cobalt salt aqueous solution generate cobaltous hydroxide suspension with excessive alkali aqueous solution, then blow oxygen-containing gas or add hydrogen peroxide Oxidize wherein cobalt is trivalent cobalt, form cobalt hydroxide, and then make tricobalt tetroxide, this method process is tedious, and washing and filtering are very difficult (because cobalt hydroxide is fine little colloidal precipitation) and the obtained product particle size is very fine, can't be used for specific purpose. Another example is the Chinese patent whose application number is 0211970 (2002.04.22), its production method is to use cobalt salt solution t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G51/04H01M4/52
CPCY02E60/10
Inventor 高联云许光惠
Owner 许光惠