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Method of preparing high-purity manganomanganic oxide by pyrolyzing manganese sulfate at high temperature

A technology of manganese tetroxide and high temperature pyrolysis, applied in manganese oxide/manganese hydroxide and other directions, can solve the problems of complicated production process and rising cost, and achieve the effects of less moisture absorption and caking, lower production cost and less investment.

Inactive Publication Date: 2007-03-14
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This new way of making magnetic materials has several advantages over current methods such as burning or nitrogen reduction processes for producing them. It does without requiring any extra steps like converting it from metal salt solution (M) instead relying on expensive chemicals called cobalt(III). By doing this, we reduce costs while still maintain good properties of these magnetism materials.

Problems solved by technology

This patents describes various technical solutions involving producing high-performance metallum trivalonferritor magnetron sputter targets by combining different chemical elements like iron, nickel, vanadium, tantalite, niobium, tin, ceramic, and rare earth element salars together through specific steps during their synthesis. These techniques aimed towards improving the properties of the target materials while minimizing environmental impact on disposers who dispose of spent parts containing excessive amounts of organic substitutes.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Dissolve the first-grade industrial manganese sulfate in clean water to a near-saturated state to obtain a manganese sulfate solution. The analysis of the contained heavy metal ion amount is carried out to the manganese sulfate solution that makes, add 0.5mol / L ammonium sulfide solution at temperature 50~80 ℃ with 2 times of the total molar number of contained heavy metal ion, make Cu 2+ 、Ni 2+ , Zn 2+ 、Co 2+ Wait for heavy metal ions to form sulfide precipitates to remove, let stand for 12 to 24 hours, and filter. Add the precipitant SDD (sodium diethylamine thioformate) into the filtrate to further purify the manganese sulfate solution, mainly to further remove trace impurities such as heavy metals and calcium and magnesium. The addition amount of SDD is 2 times of the theoretical amount of remaining trace impurities, the reaction temperature is 50-70° C., the reaction time is 1 hour, and the filter is performed. Then add the Ca of the filtrate to the filtrate 2+...

Embodiment 2

[0026] The pure manganese sulfate obtained by secondary crystallization was dried at 100°C for 2 hours, and then heated at 400°C for 2 hours for dehydration. Then it was pyrolyzed at 1100° C. for 1 hour to obtain trimanganese tetroxide with a total manganese content of 71.51%, and other quality indicators were close to those of Example 1.

Embodiment 3

[0028] The pure manganese sulfate obtained by secondary crystallization was dried at 105°C for 2 hours, and heated at 600°C for 1 hour to dehydrate. Then, it was pyrolyzed at 950°C for 3 hours to obtain trimanganese tetraoxide with a total manganese content of 71.40%, and other quality indicators were close to those in Example 1.

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Abstract

The present invention provides technological process of producing high purity manganous manganic oxide with industrial manganese sulfate as material. The technological process includes dissolving industrial manganese sulfate, depurating, filtering, the first crystallization, the second crystallization, drying, heating at 400-600 deg.c to eliminate crystal water and pyrolysis at 950-1100 deg.c to obtain high purity manganous manganic oxide. The present invention has simple technological process, low investment, cheap material, low cost, high product purity and great specific surface area of the product.

Description

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Claims

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Application Information

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Owner GUANGXI UNIV
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