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| Number | Title | Issue Date |
| 7998446 | Flue gas desulfurization process utilizing hydrogen peroxide A flue gas desulfurization process in which a SO2-containing flue gas stream is contacted with a recirculating stream of an aqueous medium containing concentrated sulfuric acid and hydrogen peroxide, to yield a desulfurized flue gas stream and to produce ... | 08/16/2011 |
| 7976809 | Method and an equipment for reducing the sulphur dioxide emissions of a marine engine A method and an equipment for reducing sulphur dioxide emissions of a marine engine, wherein flue gases are scrubbed with a scrubbing solution in a scrubber. Fresh water with added sulphur removal reagent is used as the scrubbing solution. ... | 07/12/2011 |
| 7887769 | Method of removing sulfur dioxide from flue gases and treatment of oxidized effluent therefrom A method of removing sulfur dioxide from flue gases using calcium and magnesium scrubbing components and treatment of oxidized effluent from such a system includes passing classified oxidized effluent to a regeneration tank and adding lime to produce a regenerator d... | 02/15/2011 |
| 7854911 | Method of removing sulfur dioxide from a flue gas stream A method of removing SOx from a flue gas stream including SOx includes providing a source of trona and injecting the trona as a dry sorbent into the flue gas stream. The temperature of the flue gas is at an elevated temperature greater than 400... | 12/21/2010 |
| 7731926 | Wet flue-gas desulfurization apparatus and method of wet flue-gas desulfurization Flue gas of boiler is introduced through gas inlet part of flue-gas desulfurization apparatus, and absorbent liquid sprayed from spray nozzle is trapped in recirculation tank. There, agitation is performed by oxidation agitator to thereby oxidize SO2 abso... | 06/08/2010 |
| 7641877 | Process for disposing waste gas comprising sulfur oxides and apparatus thereof A method for enlarging the particle diameters of sulfuric acid mists in waste gas and collecting the sulfuric acid mists in high efficiency is provided. A process for disposing waste gas containing sulfur oxides that introduces the waste gas in dry type electrostati... | 01/05/2010 |
| 7601317 | Process for disposing waste gas comprising sulfur oxides and apparatus thereof A method for enlarging the particle diameters of sulfuric acid mists in waste gas and collecting the sulfuric acid mists in high efficiency is provided. A process for disposing waste gas containing sulfur oxides that introduces the waste gas in dry type electrostati... | 10/13/2009 |
| 7582271 | Emission control system Methods and apparatus utilizing hydrogen peroxide are useful to reduce SOx and mercury (or other heavy metal) emissions from combustion flue gas streams. The methods and apparatus may further be modified to reduce NOx emissions. Continuous concentration of hydrogen ... | 09/01/2009 |
| 7531154 | Method of removing sulfur dioxide from a flue gas stream A method of removing SO2 from a flue gas stream including SO2 includes providing a source of trona and injecting the trona into the flue gas stream. The temperature of the flue gas is between about 600° F. and about 900° F. The trona is maint... | 05/12/2009 |
| 7438879 | Purification device for flue gas with divided scrubbing liquid sump A device provides the purification of flue gas comprising a scrubbing liquid sump divided into several basins and a pump device, which pumps the scrubbing liquid from at least one basin of the scrubbing liquid sump to scrubbing liquid nozzles. ... | 10/21/2008 |
| 7431757 | Water and sulfur removal from combustion turbine exhaust A combustion turbine power plant (10) incorporating a desiccating scrubber (140) for simultaneously removing water and sulfur from a flue gas (20) of the power plant (10). The desiccating scrubber (140) may include an inlet nozzle ... | 10/07/2008 |
| 7425314 | Process for removing sulphur compounds including hydrogen sulphide and mercaptans from gas streams A process for the removal of hydrogen sulfide and mercaptans from a gas stream containing a high ratio of mercaptans to hydrogen sulfide, wherein the first step removes hydrogen sulfide by washing the gas stream with an aqueous washing solution comprising water, a p... | 09/16/2008 |
| 7419646 | Method of deacidizing a gas with a fractional regeneration absorbent solution The gaseous effluent flowing in through line 1 is contacted in absorption zone ZA with the liquid absorbent solution flowing in through line 9. The gaseous effluent depleted in acid compounds is discharged through line 2. The absorbent solution ... | 09/02/2008 |
| 7416716 | Purification of carbon dioxide SO2 and/or NOx are removed from gaseous CO2 at elevated pressure(s) in the presence of molecular oxygen and water and, when SO2 is to be removed, NOx, to convert SO2 to sulfuric acid and/or NOx | 08/26/2008 |
| 7404938 | Emission control system Methods and apparatus utilizing hydrogen peroxide are useful to reduce NOx, SOx and mercury (or other heavy metal) emissions from combustion flue gas streams. Continuous concentration of hydrogen peroxide to levels approaching or exceeding propellant-grade hydrogen ... | 07/29/2008 |
| 7371363 | Methods of purifying hydrogen fluoride Provided are methods of producing anhydrous hydrogen fluoride comprising: providing a mixture comprising hydrogen fluoride and at least one halogenated hydrocarbon; and extracting hydrogen fluoride from the mixture by contacting the mixture with a solution of less t... | 05/13/2008 |
| 7351387 | Method for removing impurities accumulated in a scrubbing fluid A method for removing impurities accumulated in a scrubbing fluid in a flue gas scrubber and effluents from the scrubber. The flue gases are scrubbed with a scrubbing fluid that includes a calcium-containing absorbent. The scrubbing fluid containing gypsum and other... | 04/01/2008 |
| 7332143 | Targeted duct injection for SOcontrol NOx and SO3 emissions from combustion of a sulfur containing carbonaceous fuel are reduced simultaneously. The combustion gases comprising NOx and SO2 are mixed with a NOx control agent into the combustion gases... | 02/19/2008 |
| 7326392 | HS scavenging method A method for removing H2S from H2S-containing gaseous streams in which an H2S-containing gaseous stream is introduced into a flow channel and at least one liquid chemical H2S scavenging agent is also introduced into the fl... | 02/05/2008 |
| 7311887 | Hybrid wet and dry electrostatic precipitator ammonia scrubber A process reduces SOx emissions in a flue gas stream by adding a wet collector plate section to an existing electrostatic precipitator (ESP) or by converting the last field of an existing ESP to wet operation. To achieve the conversion, the last field or ... | 12/25/2007 |
| 7303735 | Process for the removal of contaminants from gas streams The present invention provides for a method and apparatus for removing contaminants from a gas stream such as a flue gas stream from an industrial process. The process utilizes a prescrubber to contact the gas stream before the gas stream contacts an oxidizer in an ... | 12/04/2007 |
| 7294322 | Collection scoop for flue gas desulfurization systems with bleed streams or ex situ forced oxidation A scoop is used to collect a liquid slurry upstream of an internal collection tank. The scoop is in fluid communication with a downcomer, which receives at least part of the collected slurry, thereby maintaining a continuous flow of liquid slurry through the scoop t... | 11/13/2007 |
| 7288235 | Method and installation for purifying gas The invention relates to a method and an installation for separating sulphur dioxide from exhaust gas, wherein sea water is added to the exhaust gas in an absorption column and the sea water charged with sulphur compounds is extracted from the liquid sump of the abs... | 10/30/2007 |
| 7261873 | Power generation from sulphur-containing fuels A process for obtaining energy values contained in a sulphur-containing carbonaceous fuel, the process comprising (a) treating a feed carbonaceous fuel having a first bound-sulphur content with an effective amount of an oxygen and SO2-containing gas in a ... | 08/28/2007 |
| 7255842 | Multi-component removal in flue gas by aqua ammonia A new method for the removal of environmental compounds from gaseous streams, in particular, flue gas streams. The new method involves first oxidizing some or all of the acid anhydrides contained in the gas stream such as sulfur dioxide (SO2) and nitric o... | 08/14/2007 |
| 7247284 | Method and apparatus for regeneration of flue gas scrubber caustic solutions A process to regenerate wet flue gas scrubber purge liquid into NaOH caustic suitable for make-up caustic for the scrubber is disclosed. Further, sulfur is removed from waste effluent in the form of gypsum with the process described herein. Lime is added to the spen... | 07/24/2007 |
| 7232504 | Apparatus and method for distilling waste liquids A distilling apparatus and method use a two step distillation and purification process for processing a waste liquid, such as an impure sulfuric acid solution, to form a highly concentrated sulfuric acid solution. First, the waste liquid is stored in a concentrating... | 06/19/2007 |
| 7214358 | Low energy regenerable SOscrubbing process Sulphur dioxide is removed from gas streams by contacting the gas stream with an absorbing medium containing an amine capable of forming an amine salt, heat stable salt and sulfite. The level of heat stable salt is selected such that during the regeneration process ... | 05/08/2007 |
| 7189282 | Method for eliminating mercaptan from crude gas This invention relates to a process for cleaning gas, in particular hydrocarbonaceous gas such as e.g. natural gas, which is contaminated with sulfur in the form of H2S and mercaptans as well as CO2. To remove the undesired sulfur-contai... | 03/13/2007 |
| 7179438 | Methods and apparatus for recovering gypsum and magnesium hydroxide The present invention provides methods and apparatus for treating flue gas containing sulfur dioxide using a scrubber, and more particularly relates to recovering gypsum and magnesium hydroxide products from the scrubber blowdown. The gypsum and magnesium hydroxide ... | 02/20/2007 |
| 7157064 | Method for treatment of flue gas cleaning products The invention relates to a method of treating a halogen containing solid or semi solid waste material from a flue gas cleaning process, wherein the amount of alkaline compounds is sufficient to provide a suspension of the waste material in water with a pH value of a... | 01/02/2007 |
| 7153481 | Method and device for separating sulphur dioxide from a gas A device (1) for separating sulphur dioxide from a gas (4) by means of an absorption liquid has an inlet (2) for gas (4) containing sulphur dioxide, an outlet (18) for gas (16), from which sulphur dioxide has been separated,... | 12/26/2006 |
| 7132178 | Hydrogen generator, fuel cell system and control method of hydrogen generator A hydrogen generator including a raw material supplying unit supplying a raw material containing a sulfur component and composed of an organic compound, a water supplying unit supplying water, a reformer producing hydrogen gas, the reformer provided with a reforming... | 11/07/2006 |
| 7128890 | Purification of hydrochloric acid obtained as by-product in the synthesis of methanesulfonic acid Process for purifying the hydrochloric acid obtained as by-product in the synthesis of MSA, characterized in that the gaseous flow of hydrogen chloride evacuated from the top of the synthesis reactor is placed in contact in a treatment column, counter-currentwise, w... | 10/31/2006 |
| 7094382 | Method and a device for the separation of sulphur dioxide from a gas A device (1) for separating sulphur dioxide from a gas has an inlet (2) for the gas (4) and an outlet (42) for gas (40), from which sulphur dioxide has been separated. An apertured plate (20) is arranged between the inlet ( | 08/22/2006 |
| 7037434 | Integrated water treatment and flue gas desulfurization process A water stream containing hardness minerals is subjected to a water treatment process using an alkali agent to precipitate the hardness minerals and to produce a softened water stream is used to create an integrated water treatment and flue gas desulfurization proce... | 05/02/2006 |
| 7033557 | Method for removal of contaminants from a hydrogen processor feed stream, as in a fuel cell power plant Method and apparatus are provided for removing contaminants from a hydrogen processor feed stream, as in a fuel cell power plant (110). Inlet oxidant (38), typically air, required by a catalytic hydrogen processor (34) in a fuel processor (14... | 04/25/2006 |
| 7033565 | Production of sulphuric acid from a feed gas with varying concentration of sulphur dioxide A process for the production of sulphuric acid from a sulphur dioxide containing feed gas with concentration of SO2 fluctuating between 0 and 100 mole % SO2 comprising the steps of contacting the feed gas with an aqueous solution comprising 0â€... | 04/25/2006 |
| 7022296 | Method for treating flue gas A multiple-field precipitator, flue-gas treating device, in accordance with the principles of the invention, includes a first section having a dual-function, sensible-cooling heat exchanger/electrostatic precipitator, a second section having a wet electrostatic prec... | 04/04/2006 |
| 6979505 | Method and apparatus for removal of contaminants from a hydrogen processor feed stream, as in a fuel cell power plant Method and apparatus are provided for removing contaminants from a hydrogen processor feed stream, as in a fuel cell power plant (110). Inlet oxidant (38), typically air, required by a catalytic hydrogen processor (34) in a fuel processor (14... | 12/27/2005 |
