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| Number | Title | Issue Date |
| 6033577 | Coordination of liquid-solid separators and fluid tanks This invention relates to a control method and apparatus for the coordination of a number of automated liquid-solid separators with an in-line pump between a fluid feed tank and liquid-solid separators. The control method and apparatus develops on-line co... | 03/07/2000 |
| 5846286 | Method for removing NOx from a gas stream while producing an alkaline earth nitrate fertilizer composition A method of producing an alkaline earth nitrate fertilizer composition where a gas stream containing nitrogen oxides is treated to convert the nitrogen oxides to nitric acid and the gas stream then contacted with an aqueous medium containing an alkaline e... | 12/08/1998 |
| 5827488 | Process for removing SO2 and NOx from a gaseous stream A process for removing both sulfur dioxide and nitrogen oxides from a gaseous stream where the stream is contacted in a first wet scrubbing unit with an alkaline earth compound to remove sulfur dioxide and humidify the gaseous stream, passing of the humid... | 10/27/1998 |
| 5817283 | Method for removing sulfur dioxide and nitrogen oxides from combustion gases A method of removing dioxide and nitrogen oxides from a gaseous stream where an alkaline earth compound is added, either in a wet scrubbing unit which substantially saturates the gaseous stream with water, or to a gaseous stream to which water has been ad... | 10/06/1998 |
| 5785841 | Method of removing sulfur dioxide and nitrogen oxides from a gaseous stream A method for removing sulfur dioxide and nitrogen oxides from a gaseous stream using a magnesium-enhanced lime scrubbing slurry containing a ferrous chelate where oxidized ferrous chelate is regenerated by electrochemical treatment. The spent scrubbing so... | 07/28/1998 |
| 5769940 | Process for producing cement and elemental sulfur from a flue gas desulfurization waste product Cement and elemental sulfur are produced by forming a moist mixture of a flue gas desulfurization process waste product containing 80-95 percent by weight calcium sulfate hemihydrate and 5-20 percent by weight calcium sulfate hemihydrate, aluminum, iron, ... | 06/23/1998 |
| 5766339 | Process for producing cement from a flue gas desulfurization process waste product Cement is produced by forming a moist mixture of a flue gas desulfurization process waste product containing 80-95 percent by weight calcium sulfite hemihydrate and 5-20 percent by weight calcium sulfate hemihydrate, aluminum, iron, silica and carbon, agg... | 06/16/1998 |
| 5705051 | Electrochemical process An electrode, electrochemical cell, and electrochemical processes are disclosed. The electrode is a porous, multi-layered electrode which can have an element in flexible, strip form wound around a central, usually flat plate core, which core may serve as ... | 01/06/1998 |
| 5695727 | Process for removing sulfur dioxide and nitrogen oxides from a hot gaseous stream with ferrous chelate regeneration A process for removing sulfur dioxide and nitrogen oxides from a hot gaseous stream, in a scrubbing unit, by use of an aqueous medium containing calcium and magnesium scrubbing components to remove sulfur dioxide and a ferrous chelate to remove the nitrog... | 12/09/1997 |
| 5683666 | Method for the removal of sulfur dioxide and nitrogen oxides for a gaseous stream A process for the simultaneous removal of sulfur dioxide and nitrogen oxides from a gaseous stream uses a sorbent containing magnesium ions and sulfite ions for sulfur dioxide removal and a metal chelating agent for nitrogen oxides removal, with the produ... | 11/04/1997 |
| 5645807 | Magnesium-enhanced sulfur dioxide scrubbing with gypsum formation A wet scrubbing method for removal of sulfur dioxide from a gaseous stream uses a magnesium-enhanced lime scrubbing aqueous slurry, where a solids content in the aqueous slurry in a wet scrubbing unit is maintained at an amount of between 13 to 20 percent... | 07/08/1997 |
| 5628811 | Method of ameliorating acid soil to enhance plant growth A method of ameliorating acid soils so as to enhance plant growth is provided by adding to soil 0.05 to 20 percent by weight, based on the weight of the soil, of a flue gas desulfurization by-product consisting essentially of 80-99 percent by weight of gy... | 05/13/1997 |
| 5614158 | Process for removing sulfur dioxide from gases and producing gypsum and purified magnesium hydroxide In a process for removing sulfur dioxide from a gas stream using an aqueous solution of magnesium scrubbing components and subsequent oxidation of the magnesium sulfite produced which is regenerated by addition of lime, a pure magnesium hydroxide product ... | 03/25/1997 |
| 5403568 | Horizontal wet scrubbing apparatus and method for removing sulfur dioxide from a gaseous stream A horizontal wet scrubbing apparatus and method for removing sulfur dioxide from hot flue gases. The apparatus has a horizontally disposed housing through which the hot flue gases are passed, and at least one liquid injection manifold vertically disposed ... | 04/04/1995 |
| 5384111 | Magnesium-enhanced lime scrubbing of sulfur dioxide with production of a high solids content sludge Sulfur dioxide is removed from a gaseous stream using an aqueous scrubbing medium containing calcium components and magnesium ions, so as to produce a more readily dewatered aqueous calcium sulfite-containing sludge by providing in the aqueous scrubbing m... | 01/24/1995 |
| 5380505 | Production of low sulfur content lime from limestone A process for calcining limestone to lime to produce a low sulfur content lime product, while combusting a sulfur-containing carbonaceous fuel in a rotary kiln to provide heat for the calcination. A finely divided lime hydrate is added to the rotary kiln ... | 01/10/1995 |
| 5336481 | Method of slaking lime A compact lime slaker has an inner vessel forming an initial slaking chamber disposed in an outer vessel forming a final slaking chamber, with agitators provided in both chambers. Slaked lime-from the final slaking chamber is pumped to a collection trough... | 08/09/1994 |
| 5312609 | Method of sulfur dioxide removal from gaseous streams with -hemihydrate gypsum product formation A method is provided for removing sulfur dioxide from a hot gaseous stream while directly producing -hemihydrate gypsum from a scrubber effluent. A portion of an aqueous scrubbing medium containing calcium and magnesium sulfite is removed from a sc... | 05/17/1994 |
| 5310498 | Sulfur dioxide removal from gases using a modified lime A wet scrubbing process for removing sulfur dioxide from combustion gases uses an aqueous slurry containing calcium components resulting from the slaking of lime, with the slaked lime formed by mixing lime with water containing a calcium sulfur-oxide salt... | 05/10/1994 |
| 5294408 | Compact lime slaker A compact lime slaker has an inner vessel forming an initial slaking chamber disposed in an outer vessel forming a final slaking chamber, with agitators provided In both chambers. Slaked lime from the final slaking chamber is pumped to a collection trough... | 03/15/1994 |
| 5270026 | Sulfur dioxide scrubbing process producing purified magnesium hydroxide A process for removing sulfur dioxide from flue gases where calcium sulfate and magnesium hydroxide are produced, with the magnesium hydroxide separated in an impure state and purified by addition of water thereto to dissolve contaminant calcium sulfate. ... | 12/14/1993 |
| 5266285 | Sodium-enhanced lime scrubbing method for removing sulfur dioxide from gaseous streams Sulfur dioxide is removed from a gaseous stream by contact with a lime slurry which contains sulfur to produce thiosulfate ions and 2,000-10,000 ppm of effective sodium ions to effect removal of the sulfur dioxide A bleed stream, removed from the scrubbin... | 11/30/1993 |
| 5200160 | Process for removing sulfur dioxide and nitrogen oxides from flue gases A process for removing sulfur dioxide and nitrogen oxide from flue gases in a wet scrubbing system using lime to remove the sulfur dioxide and ferrous-EDTA to remove the nitrogen oxides, where an initial reducing agent, such as sodium sulfide, and an anti... | 04/06/1993 |
| 5084255 | Sulfur dioxide removal process with gypsum and magnesium hydroxide production Sulfur dioxide is removed from flue gases using an aqueous solution of magnesium components in a wet scrubber, with oxidation of a portion of the aqueous discharge from the scrubber. Calcium sulfate is added to the portion of aqueous discharge at the oxid... | 01/28/1992 |
| 5082639 | Sulfur dioxide removal from gases using a modified lime A wet scrubbing process for removing sulfur dioxide from combustion gases uses an aqueous slurry containing calcium components resulting from the slaking of lime, with the slaked lime formed by mixing lime with water containing a calcium sulfur-oxide salt... | 01/21/1992 |
| 5039499 | Process for desulfurization of sulfur dioxide-containing gas streams A process for desulfurizing sulfur dioxide-containing gases wherein the sulfur-containing gases are contacted with an aqueous solution of magnesium hydroxide in a wet scrubber, wherein magnesium sulfite and magnesium bisulfite are formed, a portion of spe... | 08/13/1991 |
| 4996032 | Process for removing sulfur dioxide from flue gases A process for removing sulfur dioxide from a flue gas in a wet scrubber with an aqueous slurry formed from calcium hydroxide and magnesium hydroxide with magnesium hydroxide or magnesium oxide recovered therefrom. A thickened sludge from a thickener conta... | 02/26/1991 |
| 4976937 | Sulfur dioxide removal from flue gases with sulfite oxidation inhibition A method for removing sulfur dioxide from flue gases in a wet scrubbing system where calcium thiosulfate and calcium polysulfides are formed by the reaction of lime and emulsified sulfur and the mixture added to a recycle tank of the wet scrubber where it... | 12/11/1990 |
| 4976936 | Flue gas desulfurization with oxidation of calcium sulfite in FGD discharges A method for removing sulfur dioxide from flue gases, with oxidation of calcium sulfite in the discharge from a liquid scrubbing system to produce gypsum, oxidizes the sulfite in a thickener overflow at a pH of between 4.0 and 6.5. The calcium sulfite is ... | 12/11/1990 |
