Preparation method for cobalt carbonate material with dense structure and globoid shape

A sphere-like, cobalt carbonate technology, applied in cobalt carbonate and other directions, can solve the problems of disordered morphology, loose microstructure of cobalt carbonate materials, poor uniformity, etc., and achieve better structure compactness, easy control of process parameters, and better particle size distribution. Effect

Active Publication Date: 2012-10-03
NORTHWEST RES INST OF MINING & METALLURGY INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for preparing a cobalt carbonate material with a compact structure and a spheroidal appearance, so a

Method used

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  • Preparation method for cobalt carbonate material with dense structure and globoid shape
  • Preparation method for cobalt carbonate material with dense structure and globoid shape
  • Preparation method for cobalt carbonate material with dense structure and globoid shape

Examples

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Example Embodiment

[0022] Example 1

[0023] Put a cobalt chloride solution with a cobalt concentration of 1.0 mol / L and a pH value of 4.75 into the reactor after filtration;

[0024] Under stirring conditions, heating steps Solution, control the temperature of the solution system at 55℃ and keep the system temperature relatively stable;

[0025] Spray the pre-filtered ammonium bicarbonate solution with a concentration of 1.8 mol / L at a flow rate of 800L / h to the step In the system;

[0026] Control steps The pH value of the medium solution system is 7.5 as the end point of the system reaction, that is, the addition of ammonium bicarbonate solution is terminated;

[0027] Steps The obtained solid-liquid system is aged for 20 minutes, filtered, and washed repeatedly to obtain the desired material.

[0028] The spheroid morphology and particle size distribution of the material prepared in Example 1 are as figure 1 with figure 2 , The physical index "measurement result of particle size and density" ...

Example Embodiment

[0029] Example 2

[0030] Put a cobalt chloride solution with a cobalt concentration of 1.5 mol / L and a pH value of 4.80 into the reactor after filtration;

[0031] Under stirring conditions, heating steps Solution, control the temperature of the solution system at 63℃, and keep the system temperature relatively stable;

[0032] Spray the pre-filtered ammonium bicarbonate solution with a concentration of 2.0 mol / L at a flow rate of 588L / h to the step In the system;

[0033] Control steps The pH value of the medium solution system is 7.2 as the end point of the system reaction, that is, the addition of ammonium bicarbonate solution is terminated;

[0034] Steps The obtained solid-liquid system is aged for 30 minutes, filtered, and washed repeatedly to obtain the desired material.

[0035] The spheroid morphology and particle size distribution of the material obtained in Example 2 are as image 3 with Figure 4 , The physical index "measurement result of particle size and density...

Example Embodiment

[0036] Example 3

[0037] Put a cobalt chloride solution with a cobalt concentration of 1.6 mol / L and a pH value of 5.09 into the reactor after filtration;

[0038] Under stirring conditions, heating steps Solution, control the temperature of the solution system at 60℃ and keep the system temperature relatively stable;

[0039] Spray the pre-filtered ammonium bicarbonate solution with a concentration of 1.86 mol / L at a constant rate of 280L / h to the step In the system;

[0040] Control steps The pH value of the medium solution system is 7.2 as the end point of the system reaction, that is, the addition of ammonium bicarbonate solution is terminated;

[0041] Steps The obtained solid-liquid system is aged for 30 minutes, filtered, and washed repeatedly to obtain the desired material.

[0042] The spheroid morphology and particle size distribution of the material prepared in Example 3 are as Figure 5 with Image 6 , The physical index "measurement result of particle size and dens...

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Abstract

The invention discloses a preparation method of a cobalt carbonate material with a dense structure and a globoid shape, and aims to solve the problem that the cobalt carbonate material prepared by the conventional method has a loose microstructure, a clutter shape and poor uniformity. The preparation method comprises the following steps: putting a cobalt chloride solution meeting requirements of system temperature, pH value and cobalt concentration in a reaction kettle, and keeping relatively constancy; adding an ammonium bicarbonate solution uniformly into a cobalt solution system according to a certain flow, with a defined pH value as a reaction terminal parameter of a control system; and after aging for a certain time, filtering and repeatedly washing to obtain the required cobalt carbonate material. The cobalt carbonate material has the characteristics of globoid shape, uniform particle size, dense structure and better particle size distribution; the specific cobalt carbonate material is prepared by using standard conventional equipment; process parameters are easy to control; the operation is simple; and the cobalt carbonate material is suitable for large-scale production.

Description

technical field [0001] The invention belongs to the field of new energy and new materials, and relates to a method for preparing a cobalt carbonate material with characteristic requirements on microscopic appearance and physical properties. The cobalt carbonate obtained by the preparation method can be used to produce battery materials, hard alloys, electronic materials, etc. Precursor material for cobalt oxide products. Background technique [0002] With the vigorous development of the electronics and communication industries, the demand for lithium-ion secondary batteries for various household appliances, mobile phones, and notebook computers has doubled. Cobalt tetroxide, as an important raw material for lithium cobalt oxide materials for lithium batteries, has also achieved rapid progress in its production technology. . The appearance of cobalt oxide (especially cobalt tetroxide) is gray-black or black powder. It is an important transition metal oxide and is usually us...

Claims

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Application Information

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IPC IPC(8): C01G51/06
Inventor 吉鸿安朱来东王同敏
Owner NORTHWEST RES INST OF MINING & METALLURGY INST
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