Preparation method of high-quality electrolytic manganese dioxide

Abstract

The invention belongs to the technical field of electrolysis, and discloses a preparation method of high-quality electrolytic manganese dioxide, which comprises the following steps: adjusting the pH value of an obtained crude manganese sulfate solution to 7 by using polyamine, and filtering to obtain a manganese sulfate solution; carrying out mechanical steam recompression on the obtained manganese sulfate solution to obtain a concentrated solution; mixing the obtained concentrated solution with polyamine to obtain an electrolyte; the obtained electrolyte is electrolyzed, and electrolytic manganese dioxide is obtained; when the electrolyte is used for electrolysis, an improved manganese dioxide negative electrode is matched with a positive electrode for manganese dioxide, and an electrolyte membrane composed of mesoporous SiO2 nanoparticles and an organic polymer is integrated on the surface of the improved manganese dioxide negative electrode. In the crushing process, dust cannot be generated, noise is low, crushing is more uniform, and the device structure is more compact; meanwhile, the sulfuric acid prepared by the preparation method of the sulfuric acid is high in quality, so that the prepared electrolytic manganese dioxide is high in quality.

Description

technical field [0001] The invention belongs to the technical field of electrolysis, in particular to a method for preparing high-quality electrolytic manganese dioxide. Background technique [0002] Manganese dioxide is an inorganic compound with the chemical formula MnO 2 , It is black amorphous powder or black orthorhombic crystal, hardly soluble in water, weak acid, weak base, nitric acid, cold sulfuric acid, soluble in concentrated hydrochloric acid under heating to generate chlorine gas. It is used in the preparation of manganese salts, and is also used as an oxidizing agent, a rust remover, and a catalyst. It is mainly taken from the natural mineral pyrolusite. It is generally produced by high-temperature manganese sulfate solution electrolysis, and manganese carbonate ore and pyrolusite can be used as raw materials. The preparation of manganese sulfate solution includes leaching, iron removal, neutralization, heavy metal removal, filtration, standing still to remo...

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Problems solved by technology

[0003] In summary, the problems in the prior art are: the existing high-quality electrolytic manganese dioxide preparation method cannot fully pulverize the natural manganese ore, the pulverization effect is poor, and it cannot meet the needs; at the same time, the sulfuric acid used is of poor quality, resulting in The prepared electrolytic manganese dioxide is of low quality

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