Preparation method of cobalt carbonate and preparation method of cobaltosic oxide

A technology of cobalt tetroxide and cobalt carbonate, applied in the directions of cobalt carbonate, cobalt oxide/cobalt hydroxide, etc., can solve the problems of rising oxalic acid price, rising cost of preparing cobalt tetroxide, and small application range of cobalt tetroxide, achieving high tap density, easy realization and The effect of mastery, low technical starting point

Inactive Publication Date: 2019-02-12
HUAIHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The traditional preparation of cobalt tetroxide powder mainly adopts cobalt oxalate thermal decomposition process. In recent years, the price of oxalic acid has risen rapidly, resulting in a sharp increase in the preparation cost of cobalt tetroxide, and the shape of cobalt tetroxide produced by the traditional process is needle-like, resulting in the small range of applications

Method used

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  • Preparation method of cobalt carbonate and preparation method of cobaltosic oxide
  • Preparation method of cobalt carbonate and preparation method of cobaltosic oxide
  • Preparation method of cobalt carbonate and preparation method of cobaltosic oxide

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preparation example Construction

[0031] The invention provides a preparation method of tricobalt tetroxide.

[0032] The experimental reagent needed in this embodiment: get ammonium bicarbonate (NH 4 HCO 3 ) and cobalt chloride hexahydrate (CoCl 2 6(H 2 O)). Among them, ammonium bicarbonate is produced by Zhijiang Chemical Co., Ltd., and cobalt chloride hexahydrate is produced by Guangxi Yinyi Co., Ltd.

[0033] The experimental instruments required in this embodiment include: beaker, glass rod, constant temperature water bath, reaction vessel, stirrer, thermometer, lightning magnetic pH meter, muffle furnace, (SHB-3) multi-purpose vacuum pump for circulating water (Suzhou Qile Electronic Technology Co., Ltd. Co., Ltd.) and Malvern2000 laser particle size analyzer (Germany Malvern Instrument Co., Ltd.).

[0034] The preparation method of tricobalt tetroxide comprises the steps:

[0035] Ammonium bicarbonate (NH 4 HCO 3 ), dissolved in pure water, prepared into an ammonium bicarbonate solution with a c...

Embodiment 1

[0049] This embodiment relates to a preparation method of tricobalt tetroxide, which comprises the following steps:

[0050] Take NH 4 HCO 3, dissolved in pure water, prepared into an ammonium bicarbonate solution with a concentration of 240±4g / L, added to the head tank, and set aside.

[0051] Take CoCl 2 6(H 2 0), dissolved in pure water, prepared into a cobalt chloride solution with a concentration of 110 ± 3g / L, added to another elevated tank, and set aside.

[0052] Add a predetermined amount of deionized water into the reaction vessel, and heat the deionized water to 54°C.

[0053] Open the valve of the head tank, add part of the ammonium bicarbonate solution into the reaction vessel, and adjust the pH of the solution in the reaction vessel to a pH of 7.2±0.05.

[0054] The ammonium bicarbonate solution in the head tank and the cobalt chloride solution in the head tank are fed into the reaction vessel by co-current feeding, and the reaction is stirred by a stirrer. ...

Embodiment 2

[0065] This embodiment relates to a preparation method of tricobalt tetroxide, which comprises the following steps:

[0066] Take NH 4 HCO 3 , dissolved in pure water, prepared into an ammonium bicarbonate solution with a concentration of 240±4g / L, added to the head tank, and set aside.

[0067] Take CoCl 2 6(H 2 0), dissolved in pure water, prepared into a cobalt chloride solution with a concentration of 110 ± 3g / L, added to another elevated tank, and set aside.

[0068] Add a predetermined amount of deionized water into the reaction vessel, and heat the deionized water to 57°C.

[0069] Open the valve of the head tank, add part of the ammonium bicarbonate solution into the reaction vessel, and adjust the pH of the solution in the reaction vessel to a pH of 7.5±0.05.

[0070] The ammonium bicarbonate solution in the head tank and the cobalt chloride solution in the head tank were added to the reaction vessel by co-current feeding, and the reaction was stirred by a stirre...

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Abstract

The invention discloses a preparation method of cobalt carbonate and a preparation method of cobaltosic oxide. The preparation method of the cobaltosic oxide comprises the following steps of preparingan ammonium bicarbonate solution; preparing a cobalt chloride solution; adding a preset amount of deionized water into the reaction container; heating the deionized water to the preset temperature; adding partial ammonium bicarbonate solution into the reaction container; regulating the acidity-basicity of the solution in the reaction container until the pH is 7.1 to 7.6; adding the cobalt chloride solution and the rest ammonium bicarbonate solution into the reaction container; performing stirring reaction to generate cobalt carbonate; filtering solution in the reaction container and cobalt carbonate to obtain cobalt carbonate; washing the cobalt carbonate; roasting the cobalt carbonate to obtain cobaltosic oxide powder. The preparation method of the cobaltosic oxide has the advantages that the raw material price is low; the realization is easy; the controllable degree is high; the prepared cobaltosic oxide has uniform granularity and appearance.

Description

technical field [0001] The invention relates to a preparation method of cobalt carbonate and a preparation method of tricobalt tetroxide. Background technique [0002] Cobalt tetroxide is often used in the field of electrochemistry. It is mainly used as a precursor for the production of lithium-ion battery cathode materials—lithium cobaltate. It can also be used in fields such as corrosion resistance, high temperature resistance, and magnetic materials. In addition, it is used in cemented carbide, catalysts, and pigment additives. It also has a wide range of applications in the preparation of other materials. The traditional preparation of cobalt tetroxide powder mainly adopts cobalt oxalate thermal decomposition process. In recent years, the price of oxalic acid has risen rapidly, resulting in a sharp increase in the preparation cost of cobalt tetroxide, and the shape of cobalt tetroxide produced by the traditional process is needle-like, resulting in the The scope of appl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G51/06C01G51/04
CPCC01G51/04C01G51/06C01P2002/72C01P2004/03C01P2004/61
Inventor 胡扬剑周卫
Owner HUAIHUA UNIV
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