Method for directly preparing basic cobalt carbonate by membrane electrolysis method

A technology of cobalt carbonate and membrane electrolysis, which is applied in the direction of electrolysis process, electrolysis components, cells, etc., can solve the problems of unfavorable manual operation environment, single raw material, long process, etc., and achieve the effect of cost reduction, simple operation and short process

Active Publication Date: 2020-04-28
NORTHEASTERN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the technical problems of single raw materials, long process, high energy consumption and serious pollution unfavorable to the manual operation environment in the existing cobalt carbonate preparation technology, the present invention proposes a method for directly preparing basic cobalt carbonate by membrane electrolysis. Electrolysis of cobalt chloride aqueous solution, carbon dioxide is introduced into the cathode or the middle chamber, and under the action of anion and cation exchange membranes, the cobalt carbonate product is directly precipitated

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  • Method for directly preparing basic cobalt carbonate by membrane electrolysis method

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Embodiment 1

[0050] Using the electrolytic cell system, the cobalt chloride solution is placed in the anode chamber, and the electrolyte is placed in the cathode chamber and the middle chamber respectively; the anode plate in the anode chamber and the cathode plate in the cathode chamber are respectively connected to the two poles of the power supply through wires; the anode chamber and The middle chambers are separated by a cation exchange membrane, and the cathode chamber and the middle are separated by an anion exchange membrane; the middle chamber is equipped with a stirring paddle; the electrolyte is a sodium chloride solution with a concentration of 0.1mol / L; the initial concentration of the cobalt chloride solution is 0.1mol / L;

[0051] Turn on the power supply to apply direct current to the anode plate and the cathode plate, and control the current density of the anode plate to 200A / m 2 ;

[0052] Pass carbon dioxide gas into the cathode chamber, the purity of carbon dioxide gas i...

Embodiment 2

[0060] Method is with embodiment 1, and difference is:

[0061] (1) The electrolyte is a sodium chloride solution with a concentration of 0.08mol / L;

[0062] (2) the initial concentration of cobalt chloride solution is 0.3mol / L;

[0063] (3) Control the current density of the anode plate to 300A / m 2 ;

[0064] (4) Add sodium chloride to the filtrate in the second dissolving tank to make a sodium chloride solution with a concentration of 0.08 mol / L as the electrolyte and transport it to the middle chamber.

Embodiment 3

[0066] Method is with embodiment 1, and difference is:

[0067] (1) The electrolyte is a sodium chloride solution with a concentration of 0.04mol / L;

[0068] (2) the initial concentration of cobalt chloride solution is 0.5mol / L;

[0069] (3) Control the current density of the anode plate to 400A / m 2 ;

[0070] (4) Add sodium chloride to the filtrate in the second dissolving tank to make a sodium chloride solution with a concentration of 0.04 mol / L as the electrolyte and transport it to the middle chamber.

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Abstract

The invention provides a method for directly preparing basic cobalt carbonate through a membrane electrolysis method. The method comprises the following steps: (1) using an electrolytic cell system, placing a cobalt chloride solution in an anode chamber, and placing electrolyte in a cathode chamber and a middle chamber; (2) turning on a power supply, and controlling the current density of the anode plate to be 200-800A / m < 2 >; (3) introducing carbon dioxide into the cathode chamber, and mixing the carbon dioxide with the electrolyte to generate carbonic acid; (4) enabling Co < 2 + > in the anode chamber to enter the middle chamber through a cation exchange membrane, and enabling CO3 < 2-> and OH <-> in the cathode chamber to enter the middle chamber through an anion exchange membrane to generate basic cobalt carbonate precipitate; and (5) discharging and filtering materials in the middle chamber, and drying a filter cake to prepare the basic cobalt carbonate. The method is simple in process operation, short in flow and high in automation degree, and the obtained product is high in purity and clean in energy.

Description

technical field [0001] The invention belongs to the technical field of utilization of cobalt-containing resources and materials, and in particular relates to a method for directly preparing basic cobalt carbonate by membrane electrolysis. Background technique [0002] Cobalt is an important strategic element. It has the advantages of high melting point, good wear resistance, high strength, and good magnetism. It is an important raw material for manufacturing various high-temperature alloys, magnetic materials, and anti-corrosion alloys. Cobalt carbonate is an important compound of cobalt, which is used to prepare various cobalt compounds, calcine to prepare cobalt oxides, and is also used to prepare various chemical reaction catalysts; in ceramic technology, electronics, semiconductor materials, aerospace and other fields It is also widely used; and as a typical conversion negative electrode material, cobalt carbonate has low production cost. For graphite negative electrodes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/00C25B9/08C25B15/08C25B15/00C25B9/19
CPCC25B1/00C25B15/08C25B15/00C25B9/19
Inventor 张廷安豆志河牛丽萍林胜男刘燕吕国志赵秋月张伟光
Owner NORTHEASTERN UNIV
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