In order to obtain the optimal process conditions for preparing manganese dioxide.In this experiment,single factor method were used to study the technological conditions of hydrothermal preparation of manganese dioxide.The effects of reaction temperature,modifier dosage of dodecyl trimethyl ammonium chloride,oxidant dosage of ammonium persulfate and liquid-solid ratio on purity and yield of manganese dioxide were investigated by single factor test.The optimal conditions are as follows:reaction time of 6 h,modifier dosage of 0.75 g,oxidant dosage of ammonium persulfate of 4％,liquid-solid ratio of 7.5∶1(g∶mL),Mn content of 62.36％and yield of 81.53％,spherical manganese dioxide could be obtained and better conditions for preparation of manganese dioxide by hydrothermal method were obtained.
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