Chemistry of inorganic compounds – Oxygen or compound thereof – Metal containing
Reexamination Certificate
2011-08-16
2011-08-16
Bos, Steven (Department: 1736)
Chemistry of inorganic compounds
Oxygen or compound thereof
Metal containing
C423S140000, C423S142000, C423S144000, C423S147000
Reexamination Certificate
active
07998452
ABSTRACT:
A method of preparation of spherical tricobalt tetraoxide, including at least oxidizing a bivalent cobalt salt in a wet environment and in the presence of a precipitant, a complexing agent, and an oxidant to yield spherical cobalt oxyhydroxide.cobalt hydroxide according to the following equation Co2++3OH−+O→CoOOH.Co(OH)2; oxidizing the spherical hydroxy cobalt oxyhydroxide.cobalt hydroxide to yield spherical tricobalt tetraoxide according to the following equation 6CoOOH.Co(OH)2+O→4Co3O4+9H2O; and roasting the spherical tricobalt tetraoxide at low or intermediate temperature to yield a black powder. The method is easily practiced and suitable for mass production, and the resultant spherical tricobalt tetraoxide has stable structure, reliable properties, and high activity.
REFERENCES:
patent: 1365358 (1921-01-01), Udy et al.
patent: 2488561 (1949-11-01), Schaal
patent: 2570882 (1951-10-01), Stiles
patent: 2726144 (1955-12-01), Pincott et al.
patent: 2909408 (1959-10-01), West et al.
patent: 2006/0263690 (2006-11-01), Suhara et al.
patent: 2004/051771 (2004-06-01), None
Bos Steven
Matthias Scholl P.C.
Ningbo Jinhe New Materials Co., Ltd.
Scholl Matthias
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