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Method for preparing manganous manganic oxide

A technology of manganese tetroxide and manganese hydroxide, applied in manganese oxide/manganese hydroxide and other directions, can solve the problems of high energy consumption, general physical properties and large consumption in the preparation process, achieve simple process route, improve operating environment, The effect of reducing the cost of raw materials

Active Publication Date: 2012-11-21
四川中创启源新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it also has some problems: the purity of the product is restricted by metal manganese, such as the addition of antioxidant selenium dioxide during electrolysis to make the Se content in the prepared manganese tetraoxide high; the physical properties of the product are general, such as the BET specific surface area is more than 4 ~ 15m 2 / g, the bulk density is 0.5~0.8g / cm 3 Between; using electrolytic manganese metal as raw material, high energy consumption and high cost
The average particle size of the obtained manganese tetraoxide product can reach 25nm, the mass fraction of total manganese can reach 71.96%. Large, and the preparation process has high energy consumption and high production cost

Method used

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  • Method for preparing manganous manganic oxide
  • Method for preparing manganous manganic oxide
  • Method for preparing manganous manganic oxide

Examples

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Effect test

Embodiment 1

[0055] Using analytically pure manganese sulfate as raw material, the manganese sulfate content is greater than 99%, the iron content is 0.0005%, and the nickel content is 0.0200%. Take 20g of manganese sulfate to prepare a 100g / L solution, 9g of sodium hydroxide to prepare a 45g / L solution, at 20°C, under the condition of stirring, add the above two solutions dropwise to 100mL water at the same flow rate at the same time, after the dropwise addition, use pHS-3C laboratory acidity meter test and add sodium hydroxide solution to pH 8.5, let it stand for about half an hour, separate the turbid liquid from solid and analyze the Mn in the filtrate 2+ Concentration, the precipitation rate of manganese sulfate is 97.8%; under 40kHz ultrasonic conditions, filter again after slurrying with deionized water, repeat several times until the filtrate is saturated with BaCl 2 solution not detected Obtain the precursor manganese hydroxide; take 40mL of ammonia water / ammonium chloride solut...

Embodiment 2

[0057] Using analytically pure manganese sulfate as raw material, the manganese sulfate content is greater than 99%, the iron content is 0.0005%, and the nickel content is 0.0200%. Take 20g of manganese sulfate to prepare a 100g / L solution, 9g of sodium hydroxide to prepare a 45g / L solution, add the above two solutions dropwise to 100mL of water at the same flow rate at 30°C under stirring conditions, after the dropwise addition is completed, use pHS-3C laboratory acidity meter test and add sodium hydroxide solution to pH 9.0, let it stand for about half an hour, separate the turbid liquid from solid and analyze the Mn in the filtrate 2+ Concentration, the precipitation rate of manganese sulfate is 99.4%; under 40kHz ultrasonic conditions, filter again after slurrying with deionized water, repeat several times until the filtrate is saturated with BaCl 2 solution not detected Obtain the precursor manganese hydroxide; take 40mL of ammonia water / ammonium chloride solution (the ...

Embodiment 3

[0059] Using industrial manganese sulfate as raw material, the content of manganese sulfate is 98.2%, the content of iron is 0.0010%, the content of calcium is 0.0180%, and the content of magnesium is 0.1800%. Take 20g of manganese sulfate to prepare a 100g / L solution, 9g of sodium hydroxide to prepare a 45g / L solution, add the above two solutions dropwise to 100mL of water at the same flow rate at 30°C under stirring conditions, after the dropwise addition is completed, use pHS-3C laboratory acidity meter test and add sodium hydroxide solution to pH 9.0, let it stand for about half an hour, separate the turbid liquid from solid and analyze the Mn in the filtrate 2+ Concentration, the precipitation rate of manganese sulfate is 99.4%; under 40kHz ultrasonic conditions, filter again after slurrying with deionized water, repeat several times until the filtrate is saturated with BaCl 2 solution not detected Obtain the precursor manganese hydroxide; take 40mL of ammonia water / amm...

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Abstract

The invention relates to a method for preparing manganous manganic oxide, belonging to the technical field of chemical production. The technical problem to be solved by the invention is to provide a method for preparing manganous manganic oxide with low production cost. The method comprises the following steps of a, adding manganous hydroxide and potassium permanganate in solvent, mixing the mixtures, and reacting the obtained slurry at 100-200 DEG C for 2-6 h, wherein the dosage of potassium permanganate is as 10-100 percent of a theoretical dosage through which the manganous hydroxide can be oxidized as the manganous manganic oxide; the solvent is mixed solution of ammonium chloride, ammonia and ethanol; the concentration of the NH4Cl in the mixed solution is 5-50 g / L; the concentration of the NH3 H2O in the mixed solution is 5-50 g / L; and the volume concentration of the ethanol in the mixed solution is 10-90 percent; b, cooling the reactant, filtering and washing the cooled reactant with ions for several times, and then filtering and washing the reactant with ethanol; and c, drying the product which is filtered and washed by step b to obtain the manganous manganic oxide.

Description

technical field [0001] The invention relates to a method for preparing trimanganese tetraoxide, belonging to the technical field of chemical production. Background technique [0002] High-purity trimanganese tetroxide is mainly used to prepare manganese-zinc-iron soft magnetic materials. The soft magnetic ferrite produced by it has a narrow remanence induction curve and can be magnetized repeatedly; it has high DC resistivity and can reduce eddy current loss. It is widely used in various fields. The manufacture of electronic components is the basic material for electromechanical, electronics, information and other industries. In addition, manganese tetraoxide can also be used in semiconductor ceramics, paint or coating additives, glass colorants, rubber fillers, enamel and welding rod fluxes, etc.; And a catalyst for the selective reduction of nitrobenzene. Trimanganese tetroxide has a wide range of uses, a large market demand and broad application prospects, and is increa...

Claims

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Application Information

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IPC IPC(8): C01G45/02
Inventor 王毅姜二林阳启华
Owner 四川中创启源新材料科技有限公司
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