Method for producing high purity MnOOH
A high-purity, systematic technology, applied in the direction of manganese oxide/manganese hydroxide, etc., can solve the problems of difficult washing and separation, high price, etc., and achieve the effect of high product purity, mild reaction conditions, and easy access to raw materials
Inactive Publication Date: 2009-05-13
UNIV OF SCI & TECH BEIJING
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Problems solved by technology
The reported preparation method is the reduction of KMnO with a reducing agent 4 Get MnOOH, the raw material KMnO used in this method 4 The price is high, and the raw material contains a lot of potassium, which is difficult to wash and separate
Method used
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example 1
[0006] Example 1: Take 100 grams of Mn 3 o 4 Add 38 g MnO 2 (molar ratio is 1:1), add 100ml of water, stir, control the reaction temperature at 50°C, react for 5 hours, filter, wash, and dry to obtain MnOOH.
example 2
[0007] Example 2: Take 100 grams of Mn 3 o 4 Add 34.2 g MnO 2 (the molar ratio is 0.9:1), add 100ml of water, stir, control the reaction temperature at 80°C, react for 3 hours, filter, wash, and dry to obtain MnOOH.
example 3
[0008] Example 3: Take 100 grams of Mn 3 o 4 Add 43.7 g MnO 2 (the molar ratio is 1.15:1), add 300ml of water, stir, and control the reaction temperature at 40°C. After reacting for 8 hours, filter, wash, and dry to obtain MnOOH.
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The invention belongs to the field of hydrometallurgy, and particularly relates to a method for preparing high-purity MnOOH, which is characterized in that MnOOH is prepared in the presence of MnO2 and Mn3O4 as reaction precursors. The method comprises the following steps: mixing MnO2 and Mn3O4 by the molar ratio of (0.8-1.2) to 1; adding water by the liquid-to-solid ratio of (0.5-10) to 1; subjecting MnO2 and Mn3O4 to the reaction, wherein, the reaction formula is as follows: MnO2 + Mn3O4 + 2H2O = 4MnOOH, and the reaction temperature is in the range from the room temperature to 100 DEG C; stirring; and reacting for 0.5 to 60 hours to obtain MnOOH. The invention has the advantages that the reaction easily occurs, the reaction condition is mild, the raw material is easily accessible, no impurity is involved, and the purity of the product is high.
Description
technical field [0001] The invention belongs to the field of hydrometallurgy, and particularly provides a method for preparing high-purity MnOOH (commonly known as basic manganese oxide or hydrated manganese oxide). Background technique [0002] MnOOH has important uses in the fields of electrochemistry, batteries, and electrochromism. For example, MnOOH can be used to prepare LI-Mn-O spinel and MnO 2 equivalent precursors. The reported preparation method is the reduction of KMnO with a reducing agent 4 Get MnOOH, the raw material KMnO used in this method 4 The price is high, and the raw material contains a lot of potassium, which is difficult to wash and separate. Contents of the invention [0003] The purpose of the present invention is to prepare MnOOH with cheap and easy-to-obtain raw materials, and reduce the cost of preparing MnOOH. [0004] A method for preparing high-purity MnOOH, characterized in that MnO 2 and Mn 3 o 4 As a reaction precursor to prepare Mn...
Claims
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IPC IPC(8): C01G45/02
Inventor 邹兴邹端端刘宇
Owner UNIV OF SCI & TECH BEIJING
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