High-purity trimanganese tetroxide and preparation method thereof

A technology of trimanganese tetraoxide and manganese hydroxide, which is applied in the direction of manganese oxide/manganese hydroxide, etc., can solve the problems of lack of impurity removal means, high energy consumption of the process, and non-compliance, so as to improve the quality and scope of application, and the process is simple , the effect of improving performance
CN101898797AActive Publication Date: 2010-12-01GUIZHOU DALONG HUICHENG NEW MATERIAL CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
GUIZHOU DALONG HUICHENG NEW MATERIAL CO LTD
Publication Date
2010-12-01

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Abstract

The invention relates to an oxide of manganese, and in particular discloses high-purity trimanganese tetroxide and a preparation method thereof, wherein the Mn content in the high-purity trimanganese tetroxide is larger than 71.5 percent, and the S content is smaller than 0.03 percent. The preparation method thereof comprises the following steps of: 1. firstly dissolving high-purity manganese sulfate into water to obtain a manganese sulfate solution, then neutralizing the manganese sulfate solution with ammonia water, using the pH value of a neutralization system reaching 9.0-10.0 as the end point of a neutralization reaction, filtering, and rinsing to obtain a manganese hydroxide suspension; 2. introducing air into the manganese hydroxide suspension prepared in the step 1 at the temperature of 45-85 DEG C for oxidation, and filtering, rinsing and drying to obtain the high-purity trimanganese tetroxide after the manganese hydroxide in an oxidation system is completely converted into trimanganese tetroxide. The high-purity trimanganese tetroxide has the advantages of lower impurity content, good quality, controllable specific surface area, low preparation cost and the like.
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Description

technical field

[0001] The invention relates to a manganese compound and a preparation method thereof, in particular to a manganese oxide and a preparation method thereof. Background technique

[0002] Manganese-zinc ferrite has developed rapidly in recent years, and my country's manganese-zinc ferrite has formed two major pieces of pellets and magnetic cores. At present, the output of manganese zinc ferrite pellets in my country has exceeded 60,000 tons, which makes the production of soft ferrite popular and improved. According to incomplete statistics, there are more than 100 manganese-zinc ferrite manufacturers in my country, with a total production capacity of nearly 250,000 tons. 60% of the manufacturers are located in Zhejiang, Jiangsu and Shanghai, which makes my country the world's largest manganese-zinc ferrite producer. Ferrite producing countries. my country's magnetic material industry has also made great breakthroughs in high-end products by virtue of abundant ...

Claims

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