Patents Assigned to Isao Tanabe
  • Process for producing manganese dioxide
    Patent number: 4402931
    Abstract: Manganese dioxide having high bulk density, high tap density and high activity for use in batteries can be obtained by decomposing an aqueous solution of ammonia complex of manganese at a temperature of 68.degree. C. or higher than roasting the resulting manganese carbonate in an atmosphere of oxygen and 15-85% of steam at a temperature of 275.degree. to 375.degree. C.
    Type: Grant
    Filed: May 28, 1982
    Date of Patent: September 6, 1983
    Assignees: Isao Tanabe, Mitsui Mining & Smelting Co., Ltd.
    Inventors: Isao Tanabe, Ryoichi Nagata, Toru Watanabe, Nobuaki Miyamoto