59.
(11) Patent number: 2149832
(46) Date of publication: 27.05.2000
(51) Int. Cl.7: C 01 G 45/02
(21) Application number: 97121784/12
(22) Application date: 16.12.1997
(71) Applicant:
Institut khimii i khimiko-metallurgicheskikh protsessov SO RAN
(72) Inventor:
Kononov Ju.S.,
Zhizhaev A.M.,
Patrushev V.V.,
Kholmogorov A.G.,
Kulebakin V.G.,
Pashkov G.L.
(73) Proprietor:
Institut khimii i khimiko-metallurgicheskikh protsessov SO RAN
(98) Mail address:
660036, g.Krasnojarsk, Akademgorodok, a/ja 8668, IKhKhMP SO RA
(54) METHOD OF SYNTHESIS OF MANGANESE DIOXIDE OF GAMMA-MODIFICATION
(57)
FIELD: technology of inorganic chemistry. SUBSTANCE: method involves electrolytical synthesis on titanium anodes from manganese sulfate solutions containing sulfuric acid followed by additional treatment of anode precipitate in high-energy-intensed grinding apparatus. Mechanochemical activation of anode precipitate is carried out in planetary mill (at 50g) for 3-10 min. Additional treatment ensures to increase specific electric energy of chemical current source in Zn-MnO2 system made on the base of mechanically activated manganese dioxide by 30-60%, to 120 Wt x h/kg. Invention can be used for making cathode mass for chemical current sources of manganese-zinc system. EFFECT: improved method of synthesis, increased specific electric energy. 3 cl, 1 tbl, 4 ex
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