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Preparation method of manganese molybdate microcrystal

A manganese molybdate and microcrystalline technology, which is applied in chemical instruments and methods, manganese compounds, inorganic chemistry and other directions, can solve the problems of complex preparation methods, high reaction equipment conditions, and low product quality, and achieves low preparation costs and meets requirements. , the effect of high product yield

Inactive Publication Date: 2012-08-01
BOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional preparation method of manganese molybdate is prepared by solid phase reaction under high temperature and high pressure, which requires high reaction equipment conditions, complicated preparation method and low product quality

Method used

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  • Preparation method of manganese molybdate microcrystal
  • Preparation method of manganese molybdate microcrystal
  • Preparation method of manganese molybdate microcrystal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Slowly add the 0.5 mol / L manganese chloride solution dropwise to the 0.5 mol / L sodium molybdate solution at room temperature. The amount of the mixed solution added is based on the molar ratio of manganese chloride / sodium molybdate = 1:0.5, and the reaction is stirred and reacted at a stirring speed of 70 rpm for 20 minutes. The obtained mixed solution was subjected to hydrothermal reaction, the hydrothermal reaction temperature was 180° C., and the hydrothermal reaction time was 24 hours. After the hydrothermal reaction, cool down to room temperature naturally, filter and wash the reaction product, put it in an oven, and dry it at 40°C for 4 hours to obtain a hydrated manganese molybdate microcrystalline product.

Embodiment 2

[0025] Slowly add the manganese nitrate solution with a concentration of 0.5 mol / L to the sodium molybdate solution with a concentration of 0.5 mol / L at room temperature. The amount of the mixed solution added is based on the molar ratio of manganese nitrate / sodium molybdate=1:0.5, and the reaction is stirred and reacted at a stirring speed of 70 rpm for 20 minutes. The obtained mixed solution was subjected to hydrothermal reaction, the hydrothermal reaction temperature was 180° C., and the hydrothermal reaction time was 24 hours. After the hydrothermal reaction, cool down to room temperature naturally, filter and wash the reaction product, put it in an oven, and dry it at 40°C for 4 hours to obtain a hydrated manganese molybdate microcrystalline product.

Embodiment 3

[0027] Slowly add the manganese sulfate solution with a concentration of 0.5 mol / L to the sodium molybdate solution with a concentration of 0.5 mol / L at room temperature. The amount of the mixed solution added is based on the molar ratio of manganese sulfate / sodium molybdate = 1:0.5, and the reaction is stirred and reacted at a stirring speed of 70 rpm for 20 minutes. The obtained mixed solution was subjected to hydrothermal reaction, the hydrothermal reaction temperature was 180° C., and the hydrothermal reaction time was 24 hours. After the hydrothermal reaction, cool down to room temperature naturally, filter and wash the reaction product, put it in an oven, and dry it at 40°C for 4 hours to obtain a hydrated manganese molybdate microcrystalline product.

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Abstract

The invention which belongs to the inorganic non-metallic material preparation field especially relates to a preparation method of a manganese molybdate (W-MnMnO4) microcrystal. The method comprises the following steps: mixing a soluble manganese salt and sodium molybdate which are treated as raw materials according to a certain molar ratio, carrying out stirring reacting for 5-30min at 20-50DEG C, and carrying out a hydrothermal reaction for 6-48h at 160-230DEG C; and naturally cooling to room temperature after finishing the hydrothermal reaction, filtering, washing, and drying to obtain the manganese molybdate microcrystal. The soluble divalent manganese salt of the invention is a mixture of above one or above two of manganese chloride, manganese nitrate and manganese acetate. The preparation method has the advantages of simple and easily implemented process, high purity, low impurity content, good dispersibility, and low cost; and the diameter and the length of the obtained product are 10-50mum and 100-300mum respectively. The manganese molybdate microcrystal prepared in the invention can be widely applied to the electronic and electrical field, the mechanical field, the chemical engineering field, the building field and the like, and is an excellent predecessor for preparing other manganese salt functional materials.

Description

technical field [0001] The invention belongs to the field of preparation of inorganic non-metallic materials, and in particular relates to a manganese molybdate (W-MnMn0 4 ) Microcrystal preparation method. Background technique [0002] Manganese molybdate (MnMn0 4 ) is an important inorganic salt product, which is widely used in chemical industry, national defense, electronic industry and other industries due to its special magnetic properties, catalytic properties and electrochemical properties. Manganese molybdate (MnMn0 4 ) The main two crystal forms are: the first is α-MnMn0 4 , is also a crystal form with a relatively high temperature at normal temperature and pressure. The common synthesis method is to use manganese oxide and molybdenum oxide as reactants, and synthesize it by solid-state reaction under high temperature conditions. The second is W-MnMn0 4 , The usual synthesis method is to use manganese oxide and molybdenum trioxide as reactants, a...

Claims

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Application Information

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IPC IPC(8): C01G45/00
Inventor 许家胜张杰
Owner BOHAI UNIV
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