Chemistry of inorganic compounds – Sulfur or compound thereof – Oxygen containing
Reexamination Certificate
1999-08-09
2001-09-25
Griffin, Steven P. (Department: 1754)
Chemistry of inorganic compounds
Sulfur or compound thereof
Oxygen containing
Reexamination Certificate
active
06294146
ABSTRACT:
This invention relates generally to continuous chemical reaction, as opposed to batch processing, under continuous pressure and turbulence utilizing a plurality of towers in series. More specifically, this invention relates to a reagent liquid being pumped to proximate the top of a first of a plurality of towers; a reagent gas being introduced under pressure between the pump discharge and the first tower; the liquid being maintained at sufficient pressure and rate of flow to prevent the gas from backflowing through the pump, such that the gas initially trapped at the top of the first tower is forced through the liquid reagent at the bottom of the first tower; the reagent liquid and gas being fed from proximate the bottom of the first tower to the top of the next tower in series; the fluid from the last tower in series being fed to the initial tank from which the liquid was drawn.
U.S. Pat. No. 5,339,538 issued in 1993 to Pinske and assigned to Babcock & Wilcox Company is entitled “FLUID BED MATERIAL TRANSFER METHOD”. A pair of fluidized bed enclosures, each supplied with air is disclosed. A stream of air flowing upward through a bed of solid particles is disclosed. This flow is at a sufficient high rate to form bubbles in the bed causing high turbulence. At even higher rates of flow particles are suspended in the air and combustion streams, transporting upwardly and collected and returned to process. No disclosure of pressurized oxygen as opposed to air nor gas and liquid introduction into the top of a reaction chamber as opposed to its bottom, nor use of large slabs of solid reactant as opposed to particles.
U.S. Pat. No. 5,286,466 issued in 1994 to Hardison and assigned to Art Technologies, Inc. is entitled “MULTI-BED COCURRENT DOWNFLOW MASS TRANSFER COLUMN WITH SPHERICAL PACKING”. A packed mass transfer tower for intimate gas-liquid contact and efficient mass transfer. Solid material is required to be in hollow spheres, No disclosure of pressurized oxygen as opposed to air, nor use of large slabs of solid reactant as opposed to small particles.
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Ullmann's Encylopedia of Industrila Chemistry, 5th ed., vol. A7, pp.567-583.*
Hawley's Condensed Chemical Dictionary, 13th ed., 1997, pp. 957.*
Merrian Webster's College Dictionary, 10th ed., 1997, pp. 972.
Griffin Steven P.
Medina Maribel
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