Mineral oils: processes and products – Products and compositions – Asphalts – tars – pitches and resins
Reexamination Certificate
2006-03-07
2006-03-07
Nguyen, Tam M. (Department: 1764)
Mineral oils: processes and products
Products and compositions
Asphalts, tars, pitches and resins
C208S023000, C208S039000, C208S044000, C585S011000, C585S422000, C423S447400
Reexamination Certificate
active
07008526
ABSTRACT:
When a pitch composition prepared by mixing 100 parts by weight of mesophase pitch with 10 to 1,000 parts by weight of coal tar pitch, is heat-treated at a temperature of 500° C. or higher, it is possible to produce a high-density coke at a high yield while avoiding the foaming of the mesophase pitch. In addition, when the coke is graphitized at a temperature of 2,000° C. or higher, it is possible to obtain an artificial graphite having a high graphitization degree. Further, when the coke is first pulverized and then graphitized at a temperature of 2,000° C. or higher, it is possible to obtain a high-crystallinity graphite powder which can be suitably used as a carbon material for a negative electrode of non-aqueous solvent type secondary battery having a high discharge capacity and a high charge-discharge efficiency.
REFERENCES:
patent: 4891126 (1990-01-01), Mochida et al.
patent: 5843298 (1998-12-01), Orac et al.
patent: 6153004 (2000-11-01), Hayner
patent: 6521380 (2003-02-01), Ryu et al.
patent: 45 013453 (1966-11-01), None
patent: 01-282346 (1989-11-01), None
patent: 01-282346 (1989-11-01), None
patent: 02-175021 (1990-07-01), None
patent: 09-251855 (1997-09-01), None
patent: 9305524 (1993-06-01), None
Kanno, et al., “Modifications To Carbonization Of Mesophase Pitch By Addition Of Carbon Blacks”, inCarbonvol. 35, No. 10-11, pp. 1627-1637 (1997).
Fujiura Ryuji
Kanno Koichi
Tsuruya Hirotaka
Antonelli, Terry Stout and Kraus, LLP.
Mistubishi Gas Chemical Company, Inc.
Nguyen Tam M.
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