Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture
Reexamination Certificate
2007-05-15
2007-05-15
Marcantoni, Paul (Department: 1755)
Chemistry of inorganic compounds
Modifying or removing component of normally gaseous mixture
C502S038000, C502S039000, C502S041000
Reexamination Certificate
active
10717293
ABSTRACT:
A method for reducing the amount of mercury affixed to a sorbent and/or fly ash is disclosed. The method includes the steps of providing an amount of sorbent and/or fly ash wherein at least a portion of the amount of sorbent and/or fly ash has particulates having mercury compounds affixed to the particulates; and exposing the amount of sorbent and/or fly ash to heated flowing air until mercury compounds are liberated from at least some of the particulates. Preferably, the amount of sorbent and/or fly ash is maintained in the heated flowing air until the sorbent reaches a temperature of at least 700° F. (372° C.). When the sorbent is activated carbon, it is preferred that the amount of sorbent and/or fly ash is maintained in the heated flowing air until the activated carbon reaches a temperature in the range of 700° F. (372° C.) to 1000° F. (538° C.).
REFERENCES:
patent: 3284317 (1966-11-01), Jahnig et al.
patent: 3664935 (1972-05-01), Johnson
patent: 4619531 (1986-10-01), Dunstan
patent: 4911900 (1990-03-01), Horch et al.
patent: 5160539 (1992-11-01), Cochran
patent: 5245120 (1993-09-01), Srinivasachar et al.
patent: 5280701 (1994-01-01), Tolman
patent: 5556447 (1996-09-01), Srinivasachar et al.
patent: 5803663 (1998-09-01), Matsuyama et al.
patent: 5837052 (1998-11-01), Oates et al.
patent: 6399851 (2002-06-01), Siddle
patent: 6416567 (2002-07-01), Edlund et al.
patent: 3425070 (1986-01-01), None
patent: 3526756 (1987-01-01), None
patent: 3708941 (1988-09-01), None
patent: 3732026 (1989-04-01), None
patent: 3802884 (1989-10-01), None
patent: 19801321 (1999-07-01), None
patent: 380467 (1990-08-01), None
patent: 04061981 (1992-02-01), None
patent: 07155722 (1995-06-01), None
patent: 07155723 (1995-06-01), None
patent: 2003154233 (2003-05-01), None
patent: 94/08892 (1994-04-01), None
patent: 01/12268 (2001-02-01), None
RD 470003, Jun. 2003.
“Regeneration of activated carbon used in hte adsorption of mercury and organomercury compounds in waster gases”, Zemskov et al. Zhurnal Pirkladnoi Khimii (Saint Peterburg, Russian Federation) 1960, 33, 1222-4.
Answer 7 or 8 of Chemical Abstracts STN□□“Effluent filtering process and apparatus for an aluminum reduction cell” Johnson □□US Patent 3,6664,935 abstract only.
Answer 4 of 8 of Chemical Abstracts STN□□“Pneumatic chute for the horizontal transport of powdered bulks” Stegmaier, Journal of Powder and Bulk Solids Technology (1978), 2(1), 47-55. Abstract only.
PCT Search Report for PCT/US00/22398.
English Language Translation of DE 3802884.
English Language Translation of DE 3526756.
English Language Abstract for DE 3425070.
English Language Abstract for DE 3732026.
English Language Abstract for DE 3708941.
Patent Abstract for Japanese Publication No. 55054075 published Apr. 21, 1980.
“Adsorption of Elemental Mercury by Virgin and Impregnated Activated Carbon” in “Environmental Separation of Heavy Metals”, CRC Press, pp. 15-44, 2001.
Chang and Owens, “Developing Mercury Removal Methods for Power Plants”, EPRI Journal, vol. 19, No. 5, pp. 46-49, Jul./Aug. 1994.
Menon, “Adsorption of Mercury Vapor by Granular Activated Carbon”, Master thesis, Utah State University, 1991.
Sinha and Walker, “Removal of Mercury by Sulfurized Carbons”, Carbon, vol. 10, pp. 754-756, 1972.
Matsumura, “Adsorption of mercury vapor on the surface of activated carbons modified by oxidation or iodization”, Atmospheric Environment, vol. 8, pp. 1321-1327, 1974.
Teller and Quimby, “Mercury Removal from Incineration Flue Gas”, Proc. Annual Meeting—Air and Waste Management Association, 84th (vol. 12), 1991.
“Removal of Heavy Metals by Activated Carbon” in “Environmental Separation of Heavy Metals : Engineered Processes”, CRC Press, pp. 205-264, 2001.
Coughlin Terry L.
Fisher Bryan C.
Goeckner Bryna D.
Noegel John J.
Ramme Bruce W.
Marcantoni Paul
Quarles & Brady LLP
Wisconsin Electric Power Company
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