Production method for electrolytic manganese dioxide

An electrolytic manganese dioxide, production method technology, applied in chemical instruments and methods, cleaning methods using liquids, electrolytic components, etc., can solve the problem that the pH value of electrolytic manganese dioxide products cannot be well controlled, and the High-quality electrolytic manganese dioxide products cannot be removed well, etc., to achieve good economic and social benefits, low production costs, and improved quality.
CN102220490BActive Publication Date: 2012-09-12GUANGXI GUILIU CHEM CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
GUANGXI GUILIU CHEM CO LTD
Publication Date
2012-09-12

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Abstract

The invention relates to a production method for electrolytic manganese dioxide. The method comprises the following steps of: A. preparing a mixed liquid of crude manganese sulfate and slurry; B. neutralizing the mixed liquid to remove iron; C. carrying out three-time deep purification on the crude manganese sulfate solution including first purification to remove heavy metals, second purification to remove trace element molybdenum and third purification to remove calcium sulfate and magnesium sulfate; D. electrolyzing; E. rinsing including six steps of washing acid with hot water, rinsing with a weak base, rinsing with a strong base, washing base with hot water, backwashing with a diluted acid and rinsing with hot water; F. milling; and G. mixing to obtain an electrolytic manganese dioxide product. According to the invention, low-grade manganese oxide ore is used as a main raw material to prepare a manganese sulfate solution, the manganese sulfate solution is subjected to deep purification treatment to obtain a high-purity electrolyte, high-performance electrolytic manganese dioxide special for mercury-free alkaline cells and automobile power cells can be respectively produced under different electrolysis conditions, and the obtained electrolytic manganese dioxide product has low impurity content and high quality.
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Description

technical field

[0001] The invention relates to a production method of electrolytic manganese dioxide, in particular to a method for leaching manganese sulfate solution by oxidation-reduction reaction of low-grade manganese oxide ore and high-activity pyrite under acidic conditions, and the manganese sulfate solution is obtained after deep purification. High-purity electrolyte, this high-purity electrolyte is used under two different electrolytic conditions to produce high-performance mercury-free alkaline battery-specific electrolytic manganese dioxide and automobile power battery-specific electrolytic manganese dioxide. Background technique

[0002] Electrolytic manganese dioxide for automotive power batteries is the raw material for the positive electrode material of lithium-ion rechargeable batteries. Lithium-ion battery cathode materials belong to the new energy and new material industry fields supported by the state. Lithium manganese oxide, as a cathode material for ...

Claims

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