Process for preparing cobaltosic oxide powder by solid-phase catalytic oxidation of cobaltous chloride

A technology of cobalt tetroxide powder and catalytic oxidation, which is applied in the direction of cobalt oxide/cobalt hydroxide, etc., can solve the problems of inability to effectively guarantee uniformity and consistency, wide particle size distribution, long process flow, etc., and achieves easy control of unfavorable factors and good product quality. , the effect of short process

Active Publication Date: 2005-12-07
NINGBO RONBAY LITHIUM BATTERY MATERIAL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the liquid phase precipitation method is mostly used in the industrial production of cobalt tetroxide powder. Its obvious disadvantages are that the process is long, and the process parameters such as temperature, pH value, residence time, stirring intensity, and flow rate of the precipitant are numerous in the precipitation process, and the controllability and reproducibility are poor. , the prepared cobalt tetroxide powder has a small density and a wide particle size distribution, and the uniformity of the same batch and the consistency of different batches cannot be effectively guaranteed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Embodiment one, take cobalt chloride (COCl 2 6 hours 2 O) 3000 g, NH 4 30 grams of Cl, mix it evenly, dry it at 100-120°C, crush the dried material to 60 mesh, and then pyrolyze the obtained powder in a calciner at 350-450°C for 3 hours. Gained tricobalt tetroxide particle size is normal distribution, d 50 9.0μm, bulk density 1.10g / cm 3 .

Embodiment 2

[0011] Embodiment two, take cobalt chloride (COCl 2 6 hours 2 O) 3000 g, NH 4 75 grams of Cl, mix it evenly, dry it at 100-120°C, crush the dried material to 60 mesh, and then pyrolyze the obtained powder in a calciner at 350-450°C for 3 hours. Gained tricobalt tetroxide particle size is normal distribution, d 50 5.8μm, bulk density 0.75g / cm 3 .

Embodiment 3

[0012] Embodiment three, take cobalt chloride (COCl 2 6 hours 2 O) 3000 g, NH 4 60 grams of Cl, mix it evenly, dry it at 100-120°C, crush the dried material to 60 mesh, and then pyrolyze the obtained powder in a calciner at 350-450°C for 3 hours. Gained tricobalt tetroxide particle size is normal distribution, d 50 7.0μm, bulk density 0.90g / cm 3 .

[0013] Example four, take cobalt chloride (COCl 2 6 hours 2 O) 3000 g, NH 4 Cl 30 g, NH 4 NO 3 30 grams, CH 3 -(CH 2 )17NH 2 15 grams, mix it evenly, dry it at 100-120°C, then crush the dried material to 60 mesh, and then pyrolyze the obtained powder in a calciner at 350-450°C for 3 hours. Gained tricobalt tetroxide particle size is normal distribution, d 50 5.0μm, bulk density 0.69g / cm 3 .

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PUM

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Abstract

Disclosed is a process for preparing cobaltosic oxide powder through cobalt chloride solid phase catalytic oxidation, which comprises mixing cobalt chloride with catalyst proportionally, drying, disintegrating and sintering, the advantages of the process include shorter process flow, higher controllability of the processing parameters, better consistency and narrower dimension distribution.

Description

technical field [0001] The invention relates to the field of fine chemical industry, and relates to a preparation process for preparing tricobalt tetroxide powder by solid-phase catalytic oxidation of cobalt chloride. Background technique [0002] The known cobalt tetroxide powder is mainly used in lithium-ion battery cathode material LiCoO 2 synthesis. Fine particle size, high density, and narrow particle size distribution are ideal for CO 3 o 4 basic requirements. At present, the liquid phase precipitation method is mostly used in the industrial production of cobalt tetroxide powder. Its obvious disadvantages are that the process is long, and the process parameters such as temperature, pH value, residence time, stirring intensity, and flow rate of the precipitant are numerous in the precipitation process, and the controllability and reproducibility are poor. , the prepared cobalt tetroxide powder has a small density and a wide particle size distribution, and the unifor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G51/04
Inventor 张慧
Owner NINGBO RONBAY LITHIUM BATTERY MATERIAL CO LTD
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