High purity magnetite formation process and apparatus, and...

Chemistry of inorganic compounds – Oxygen or compound thereof – Metal containing

Reexamination Certificate

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Reexamination Certificate

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07744848

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.

REFERENCES:
patent: 672192 (1901-04-01), MacDonald
patent: 2545932 (1951-03-01), Tiddy et al.
patent: 2693409 (1954-11-01), Stephens. Jr.
patent: 2694656 (1954-11-01), Camras
patent: 2900236 (1959-08-01), Speed et al.
patent: 3210180 (1965-10-01), Jukkola
patent: 3276858 (1966-10-01), Pfeiffer et al.
patent: 3843773 (1974-10-01), Pingaud
patent: 3928709 (1975-12-01), Audran et al.
patent: 4311684 (1982-01-01), Umeki
patent: 4376714 (1983-03-01), Pingaud
patent: 4436681 (1984-03-01), Barczak et al.
patent: 4629500 (1986-12-01), Janz et al.
patent: 4822509 (1989-04-01), Bishara et al.
patent: 5348160 (1994-09-01), Kindig
patent: 5512195 (1996-04-01), Mano et al.
patent: 5794791 (1998-08-01), Kindig
patent: 5837051 (1998-11-01), Krekel et al.
patent: 6302952 (2001-10-01), Mobbs et al.
patent: 6827757 (2004-12-01), Ozaki et al.

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