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Trimanganese tetroxide preparation method and trimanganese tetroxide prepared therethrough

A technology of trimanganese tetraoxide and oxidative properties, which is applied in the direction of manganese oxide/manganese hydroxide, etc., can solve problems such as difficult operation, and achieve the effects of simple operation, simple process and low energy consumption

Inactive Publication Date: 2014-02-12
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method uses a sealed kettle to react at >100°C, which is a high-temperature and high-pressure hydrothermal reaction, and the operation is not easy

Method used

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  • Trimanganese tetroxide preparation method and trimanganese tetroxide prepared therethrough
  • Trimanganese tetroxide preparation method and trimanganese tetroxide prepared therethrough
  • Trimanganese tetroxide preparation method and trimanganese tetroxide prepared therethrough

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preparation example Construction

[0019] The invention provides a preparation method of trimanganese tetroxide, comprising steps: 1) mixing and dissolving a manganese source, cetyltrimethylammonium bromide, polyvinylpyrrolidone and an alkaline precipitant to obtain an aqueous solution; 2) Pass an oxidative atmosphere into the aqueous solution obtained in step 1) or add H2O2 to react to obtain a manganese-containing solid oxide; 3) sequentially wash and dry the manganese-containing solid oxide obtained in step 2) to obtain trimanganese tetraoxide product. The reaction system of the present invention can react under static conditions, and can also react under dynamic conditions such as mechanical stirring and magnetic stirring, and is more preferably a static reaction, which is more conducive to the free growth of crystals without disturbance.

[0020] The washing treatment of the present invention is a washing treatment method known to those skilled in the art, which can be: ultrasonically disperse the manganes...

Embodiment 1

[0044] Weigh 0.189gMnSO 4 ·H 2 O, 1.218gCTAB, 0.180gPVP (1w), 1.335g urea, add 200ml of water and stir to dissolve, blow air into the surface at 80°C for 24h, centrifuge wash with distilled water and dry at 60°C for 6h to obtain Mn 3 o 4 Sample S1.

Embodiment 2

[0046] Compared with Example 1, the difference is that: "24h reaction by blowing air into the surface at 80°C" was changed to "8h reaction by blowing oxygen into the surface at 95°C", and the rest were the same as in Example 1 to obtain Mn 3 o 4 Sample S2.

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Abstract

The invention provides a trimanganese tetroxide preparation method. The preparation method comprises the following steps: 1, mixing and dissolving a manganese source, cetyltrimethylammonium bromide, polyvinylpyrrolidone and an alkaline precipitating agent to obtain an aqueous solution; 2, introducing an oxidative atmosphere or adding H2O2 to the aqueous solution obtained in step 1 for reacting to obtain a manganese-containing solid oxide; and 3, sequentially washing and drying the manganese-containing solid oxide obtained in step 2 to obtain a trimanganese tetroxide product. The invention also provides trimanganese tetroxide. The preparation method has the advantages of simplicity, simple operation, environmental protection, and the trimanganese tetroxide product has the advantages of regular morphology and good dispersibility.

Description

technical field [0001] The invention belongs to the technical field of manganese compound synthesis, and in particular relates to a preparation method of trimanganese tetraoxide. Background technique [0002] mn 3 o 4 It is a stable manganese oxide, which has a wide range of applications in catalysts, battery materials and electromagnetic storage devices. [0003] On the battery side, Mn 3 o 4 with LiMn 2 o 4 The same spinel structure, hence the use of Mn 3 o 4 Preparation of LiMn by Sintering as Precursor 2 o 4 It can reduce the time of crystal transformation and greatly shorten the time of solid phase sintering. At the same time, Mn 3 o 4 The morphology regularity and particle dispersion of the precursor have a decisive influence on the morphology and dispersion of the sintered product. Therefore, the preparation of spinel LiMn with better performance 2 o 4 , requiring Mn 3 o 4 The precursor has good shape regularity and particle dispersion. [0004] mn ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G45/02
Inventor 陈小芳
Owner BYD CO LTD
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