Method for preparing hexagonal plate cobaltosic oxide

A technology of tricobalt tetroxide and hexagonal flakes, applied in the direction of cobalt oxide/cobalt hydroxide, etc., can solve the problems of long preparation time, cracks on the surface of the product hexagonal flakes, etc., achieve uniform particle size, reduce energy consumption and preparation cost, and achieve high product quality. Effect

Active Publication Date: 2011-11-23
HUNAN YACHENG NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The biggest disadvantage of this method is that the highly toxic substance potassium cyanide is used, the preparation time is long, and the surface of the product hexagonal sheet has cracks

Method used

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  • Method for preparing hexagonal plate cobaltosic oxide
  • Method for preparing hexagonal plate cobaltosic oxide
  • Method for preparing hexagonal plate cobaltosic oxide

Examples

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Effect test

Embodiment 1

[0024] Embodiment 1 The preparation method of hexagonal sheet cobalt tetroxide comprises the following steps:

[0025] (1) Mixing: Cobalt raw material - CoCl 2 ·6H 2 O. Saturated solution of strong base - saturated solution of sodium hydroxide and flux - H 3 BO 3 Stir for 20 minutes at a molar ratio of 1:3:1 to make it fully mixed evenly, and then put it into an oven and dry it for 24 hours at a temperature of 80° C. to obtain a sintered material.

[0026] (2) Roasting: after crushing the sintered material to 40-80 mesh, transfer it to the roasting crucible, send it into the roasting furnace to raise the temperature at a rate of 5-10°C / min, roast at 750°C for 3 hours, and then cool it naturally. Get a sinter.

[0027] (3) Soaking: Soak the sintered product with a crucible in 0.1M hydrochloric acid for 1 hour, wash and filter to obtain a wet product of hexagonal flakes of tricobalt tetroxide.

[0028] (4) Drying: put the wet product of cobalt trioxide hexagonal flakes into...

Embodiment 2

[0029] Embodiment 2 The preparation method of hexagonal sheet cobalt tetroxide comprises the following steps:

[0030] (1) Mixing: Cobalt raw material - CoCl 2 ·6H 2 O. Saturated solution of strong alkali - saturated solution of potassium hydroxide and flux - KCl are stirred at a molar ratio of 1:4:5 for 20 minutes to make them fully mixed evenly, and then put them into an oven and dry them for 24 hours at a temperature of 80°C Finally, the sintered material is obtained.

[0031] (2) Roasting: After crushing the sintered material to 40-80 mesh, transfer it to a roasting crucible, send it into a roasting furnace to raise the temperature at a rate of 5-10 °C / min, and roast it at 900 °C for 6 hours, then cool it naturally. Get a sinter.

[0032] (3) Soaking: Soak the sintered product with a crucible in 1M hydrochloric acid for 0.5h, wash and filter to obtain a wet product of cobalt tetraoxide hexagonal flakes.

[0033] (4) Drying: Put the wet product of hexagonal tricobalt te...

Embodiment 3

[0034] Embodiment 3 The preparation method of hexagonal sheet cobalt tetroxide comprises the following steps:

[0035] (1) Mixing: Cobalt raw material - CoSO 4 ·7H 2 O. Saturated solution of strong base - saturated solution of sodium hydroxide and flux - Na 2 B 4 o 7 10H 2 O was stirred at a molar ratio of 1:6:2 for 20 minutes to make it fully mixed evenly, and then placed in an oven at a temperature of 80° C. and dried for 48 hours to obtain a sintered material.

[0036](2) Roasting: After crushing the sintered material to 40-80 mesh, transfer it to the roasting crucible, send it into the roasting furnace to raise the temperature at a rate of 5-10°C / min, and roast it at 800°C for 0.5h, then cool it naturally , to obtain a sintered product.

[0037] (3) Soaking: Soak the sintered product with a crucible in 2M hydrochloric acid for 3 hours, wash and filter to obtain a wet product of cobalt tetraoxide hexagonal flakes.

[0038] (4) Drying: Put the wet product of cobalt tr...

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Abstract

The invention relates to a method for preparing hexagonal plate cobaltosic oxide. The method comprises the following steps of: (1) mixing materials, namely uniformly mixing a cobalt raw material, alkali saturated solution and fluxing agent, and drying to obtain a sintering material; (2) roasting, namely crushing and roasting the sintering material, and naturally cooling to obtain sinter; (3) infiltrating, namely placing the sinter in 0.1 to 2.0M hydrochloric acid, soaking, washing and filtering to obtain a cobaltosic oxide hexagonal plate wet product; and (4) drying, namely drying the cobaltosic oxide hexagonal plate wet product to obtain a hexagonal plate cobaltosic oxide product. The hexagonal plate cobaltosic oxide is directly synthesized through calcining at one time, so that the synthesis of precursor precipitate is avoided, the reaction steps, temperature and time are effectively reduced, the energy consumption and preparation cost are reduced, reaction conditions are easy to control, and the large-scale industrial production can be realized conveniently; meanwhile, the product has high purity and yield, uniform particle size and stable performance.

Description

technical field [0001] The invention relates to the technical field of inorganic salt materials, in particular to a preparation method of hexagonal cobalt trioxide. Background technique [0002] Cobalt tetroxide (Co 3 o 4 ) is an important functional material, which is the main raw material for preparing lithium cobalt oxide, the positive electrode material of lithium-ion batteries, and is also widely used in the fields of supercapacitors, ceramics, catalysts, sensors, magnetic materials and the like; its preparation methods are many: chemical Precipitation-thermal decomposition method, direct precipitation method, colloid chemical method, mechanical ball milling method, hydrothermal method, etc. At present, the method of industrialized production is mainly the chemical precipitation-calcination method, that is, under the control of temperature, pH value and other process conditions, various thermal decomposition precursors can be prepared, and the morphology and particle ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G51/04
Inventor 孟庆芬朱东海刘鑫乃学瑛董亚萍李武
Owner HUNAN YACHENG NEW MATERIAL CO LTD
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