| 摘要 |
PURPOSE:To produce easily and inexpensively a titled compd. by using raw materials of low to high concn. by subjecting a slurry formed by adding aq. ammonia to an aq. manganese sulfate soln. to a hydrothermal treatment at a high temp. and high pressure in the presence of gaseous oxygen. CONSTITUTION:A slurry of about 9.1-9.6 pH obtd. by adding aq. ammonia to an aq. manganese sulfate soln. is subjected to a hydrothermal treatment in a gaseous oxygen atmosphere kept at about 80-200 deg.C and about 10-30kg/cm<2>, by which a manganese compd. is produced. The manganese compd. of high purity (beta-MnOOH, gamma-MnOOOH, Mn2O3, MnO2, etc.) is produced easily on an industrial scale by using the aq. manganese soln. of low to high concn. without requiring costly raw materials according to the above-mentioned method. The manganese compd. of a desired kind is obtd. by selecting the conditions for the hydrothermal treatment.
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