Chemical apparatus and process disinfecting – deodorizing – preser – Chemical reactor – Including solid reactant and means charging solids into – or...
Reexamination Certificate
2010-01-29
2011-11-15
Griffin, Walter (Department: 1774)
Chemical apparatus and process disinfecting, deodorizing, preser
Chemical reactor
Including solid reactant and means charging solids into, or...
C422S109000, C422S129000, C422S145000, C422S146000, C422S232000, C423S632000, C075S010150, C075S232000, C075S245000, C075S246000
Reexamination Certificate
active
08057750
ABSTRACT:
A process of producing magnetite with a high purity of greater than 90% magnetite, more typically greater than 98% magnetite, by reducing powdered hematite into magnetite under maximum temperatures of about 700 to 1300° C. against a counter-current of or concurrent with methane or natural gas in a heating device. The amount of methane used to reduce the hematite may be about 0.18 and 1.8 standard cubic feet of methane per pound of hematite. A product of high purity methane produced from the process is also provided, where the magnetite is below 1 μM in diameter and has a magnetic saturation greater than 90.0 emu/g. Corresponding apparatus using an improved feeder system for powdered hematite is provided.
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Nickels Dale L.
Sawayda Michael E.
Weyand Thomas E.
Abeles, Esquire Daniel C.
Eckert Seamans Cherin & Mellott , LLC
Griffin Walter
Marmo, Esquire Carol A.
Pittsburgh Iron Oxide, LLC
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