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Method for producing high-purity manganese monoxide

A manganese monoxide, high-purity technology, applied in manganese oxide/manganese hydroxide and other directions, can solve the problem of impurity content that is difficult to meet the high impurity content of high-purity manganese monoxide and manganese trioxide, and cannot meet customer requirements, etc. Implementation, low impurity content, no environmental pollution effect

Inactive Publication Date: 2010-03-03
HUNAN JOYFLY NEW MATERIAL
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Whether it is electrolytic manganese dioxide or chemical manganese dioxide, its impurity content is difficult to meet the requirements of high-purity manganese monoxide, and when it is reduced with carbon, it is difficult to accurately measure carbon. When the amount is high, the product contains manganese dioxide or manganese trioxide impurities too high
And prepare manganese monoxide by heating with manganese carbonate under air-isolated condition, then require manganese carbonate purity to be very high, and can't buy high-purity manganese carbonate on the market at present, therefore, can not satisfy customer's demand for high-purity manganese monoxide (greater than 99.9%) ) requirements

Method used

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  • Method for producing high-purity manganese monoxide
  • Method for producing high-purity manganese monoxide

Examples

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Embodiment 1

[0016] Example 1, take 100 grams of electrolytic manganese metal flakes, grind them to 100 mesh, place them in an atmosphere furnace, heat them to 400°C, feed water vapor at 2 liters per minute for 8 hours, and then add 1 liter per minute to Feed nitrogen in 1 minute, stop heating, be cooled to room temperature, obtain 158 grams of high-purity manganese monoxide with a purity of 99.9%.

Embodiment 2

[0017] Example 2, take 200 grams of electrolytic manganese metal flakes, grind them to 500 mesh, put them in an atmosphere furnace, heat them to 1000°C, feed water vapor at 3 liters / minute for 2 hours, and then add 2 liters / minute Feed argon in 1 minute, stop heating, cool to room temperature, obtain 316.5 grams of high-purity manganese monoxide with a purity of 99.9%.

Embodiment 3

[0018] Example 3, take 100 grams of electrolytic manganese metal sheet, grind it to 800 mesh, put it in an atmosphere furnace, heat it to 750 ° C, feed water vapor at 1.5 liters / minute for 6 hours, and then add 2 liters / minute Feed carbon dioxide in 1 minute, stop heating, be cooled to room temperature, obtain 158.2 grams of high-purity manganese monoxide with a purity of 99.9%.

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Abstract

The invention discloses a method for producing high-purity manganese monoxide, which comprises the following steps: crushing an electrolytic manganese metal which is used as a raw material into a certain fineness, heating the electrolytic manganese metal powder to between 400 and 1,000 DEG C, introducing water vapor and inert gas or water vapor and carbon dioxide into the powder, thermally treating the mixture for 2 to 8 hours, and cooling the mixture to room temperature to obtain the high-purity manganese monoxide. The method has the advantages of sufficient, cheap and pure raw material, simple preparation process, low production cost, no environment pollution and high product purity.

Description

Technical field: [0001] The invention relates to a method for preparing chemical raw materials, in particular to a method for producing high-purity manganese monoxide from electrolytic metal manganese powder. Background technique [0002] Manganese monoxide is a widely used chemical raw material, mainly used in ferrite production, paint drier, catalyst for amyl alcohol production, and also used in medicine, smelting, welding, fabric reduction printing and dyeing, glass coloring, oil bleaching, Ceramic kiln industry and dry battery manufacturing, etc. [0003] The production of manganese monoxide by traditional technology is mainly obtained by adding carbon to manganese dioxide as raw material in a rotary kiln or a reverberatory furnace. Manganese monoxide can also be prepared by heating and decomposing manganese carbonate. [0004] MnO 2 +C→MnO+CO↑(850℃) [0005] MnO 2 +CO→MnO+CO 2 ↑(850℃) [0006] MnCO 3 →MnO+CO 2 ↑(>500℃) [0007] Whether it is electrolytic man...

Claims

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Application Information

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IPC IPC(8): C01G45/02
Inventor 胡国梁
Owner HUNAN JOYFLY NEW MATERIAL
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