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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...
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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...
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7332143 |
Targeted duct injection for SO3 control
NO x and SO 3 emissions from combustion of a sulfur containing carbonaceous fuel are reduced simultaneously. The combustion gases comprising NO x and SO 2 are mixed with a NO x control agent...
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7326392 |
H2S scavenging method
A method for removing H 2 S from H 2 S-containing gaseous streams in which an H 2 S-containing gaseous stream is introduced into a flow channel and at least one liquid chemical H 2 S scavenging...
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7311887 |
Hybrid wet and dry electrostatic precipitator ammonia scrubber
A process reduces SO x 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...
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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...
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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,...
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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...
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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...
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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...
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7214358 |
Low energy regenerable SO2 scrubbing 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...
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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 H 2 S and mercaptans as well as...
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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...
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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...
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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...
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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...
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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...
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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 SO 2 fluctuating between 0 and 100 mole % SO 2 comprising the steps of contacting...
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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...
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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...
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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...
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6932952 |
Method and apparatus for wet type flue-gas desulfurization
A wet type exhaust gas desulfurization method includes sucking liquid in a liquid reservoir containing a sulphur compound formed from sulphur dioxide contained in exhaust gas so as to form a flow...
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6881389 |
Removal of H2S and CO2 from a hydrocarbon fluid stream
A system for removal of Hydrogen Sulfide (H 2 S) and/or Carbon Dioxide (CO 2 ) from natural gas via absorption and disassociation utilizing a sea water contact system. In the preferred embodiment...
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6881243 |
Method for removing acidic gases from waste gas
A method for removing acidic gases from waste gases is disclosed. The invention relates to a method for removing acid gases, in particular from SO 2 and NO x , by contacting the waste gas with an...
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6863875 |
Flue gas treating system and process
In a flue gas treating system, an absorption tower ( 21 ), a reheating section ( 22 ) and a fan ( 23 ) are arranged in line on a vertical axis so as to function as at least a part of a stack for...
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6761863 |
Process for the removal of impurities from gas streams
The present invention relates to a process for removing nitrogen oxides, sulfur oxides, mercury and mercuric oxide from gas streams such as furnace or utility boiler flue gas streams, particularly...
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6759019 |
Process for desulfurization of exhaust gas with seawater
A method for removing an acidic component such as sulfite gas (SO 2 ) contained in an exhaust gas comprising by using a system comprising (a) a gas-liquid contact apparatus composed of an...
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6749820 |
Chloride/sulfate removal system
The liquid cooling spray in a gas conditioning chamber is modified by the addition of an alkali to scrub sulfuir dioxide and other acid forming gases and a separation unit to remove particles that...
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6722295 |
Method for the combined reduction of nitrogen oxide and sulfur dioxide concentrations in the furnace region of boilers
A method for the combined reduction of sulfur dioxide, SO 2 , and nitrogen oxides, NO x , in the gas stream of a furnace from the combustion of fossil fuels is disclosed. In a narrow gas...
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6709592 |
Removal of sulfur compounds from wastewater
The invention relates to a process for removal of sulfur compounds from wastewater, which process provides recovery of elemental sulfur. The process is carried out in two separate anaerobic...
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6676911 |
Exhaust gas treating agent, process for producing the same, and method of treating exhaust gas
The invention provides an exhaust gas treatment agent characterized in that it comprises calcium silicate hydrate particles having a mean particle diameter of 0.2 to 4 μm and a specific surface...
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6638485 |
Process for treating exhaust gas and exhaust gas treating equipment
A process for treating an exhaust gas contaminated with dust, Hg, NO x , and SO x is provided by adding a mercury chlorinating agent, such as, for example, HCl, NH 4 Cl, or Cl 2 , and ammonia to...
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6579506 |
Treatment of gas streams containing reduced sulfur compounds
Gas streams containing non-condensible gases (NCG's) including reduced sulfur compounds, such as hydrogen sulfide, dimethyl sulfide, dimethyl disulfide and mercaptans, are treated to remove the...
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6534030 |
Process for producing ammonium thiosulfate
A process for producing ammonium thiosulfate by contacting a feed gas containing hydrogen sulfide and ammonia with an aqueous absorbing stream containing ammonium sulfite and ammonium bisulfite to...
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6531104 |
Process for the absorption of sulfur oxides and the production of ammonium sulfate
A flue gas mixture containing sulfur oxides is scrubbed in a countercurrent spray tower absorber with a spray of ammonium sulfate liquor and the scrubbed gas stream containing ammonia aerosols,...
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6503471 |
Process for malodorous gas treatment
Malodorous gases such as amines, organosulfur compounds, hydrogen sulfide, styrene and aldehydes are economically and efficiently treated at ambient temperature and pressure by a catalytic...
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6464952 |
Sulfur dioxide abatement method
A pollution control apparatus and method to scrub sulfur dioxide uses a lime slurry consisting of small diameter hydrated lime particles injected into the cooling water of a gas cooling tower. The...
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6447740 |
Mercury removal from flue gas
The invention is directed to a process for oxidizing gaseous pollutants in a flue gas stream composed of flue gases, water vapour and one or more gaseous pollutants selected from the group...
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6440379 |
Apparatus to recover sulfur from concentrated acid gas into alkaline solution
An apparatus and method for sulfur recovery uses a scrubber tower with a plurality of vertically spaced scrubber trays in the tower. Sulfide-lean liquor is supplied to each of the trays and an acid...
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6432375 |
Method for removing hydrogen sulfide from gas streams
The invention disclosed relates to a process for removing hydrogen sulfide from a gas stream, such as sour natural gas, with the formation of elemental sulfur as a by-product. By controlling the...
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6416725 |
Removal of contaminants from gas streams in rayon production
Sulfurous gas streams comprising hydrogen sulfide and carbon disulfide, such as produced as a by-product of the rayon-forming process, are processed to recover the components in a useable form. The...
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6416724 |
Method for cleaning of combustion gas containing impurities
A method is provided for cleaning a combustion exhaust gas containing impurities, such as sulfur oxides and hydrochloric acid, with an additive, such as calcium hydroxide, in a reactor. The...
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6365099 |
In situ gas scrubbing method and system for odor and corrosion control in wastewater collection systems
A process and system for reducing the concentration of odorous contaminants, primarily hydrogen sulfide, in the vapor spaces of sewage handling and treatment systems, primarily the vapor spaces of...
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6344177 |
Heat recovery and pollution abatement device
A heat recovery and pollution abatement process with stackless operation for removing the products of combustion from hot boiler flue gas ( 45 ) comprising the steps of passing said hot boiler flue...
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6342169 |
Safe storage and transportation of sulfur dioxide
The invention relates to a method of confining sulfur dioxide for storage or transportation under safe conditions. The method of the invention comprises the steps of (a) contacting a sulfur...
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6322763 |
Method and apparatus for removing carbonyl sulfide from a gas stream via wet scrubbing
Methods for removing carbonyl sulfide (COS) from a synthesis gas stream are disclosed. The method entails raising the water level of a wet scrubber so that hydrolysis of the COS may occur in the...
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6280696 |
Method and apparatus for removing high boiling point volatile organic compounds from an exhaust
A method for removing high boiling point volatile organic compounds from an exhaust gas and an apparatus for performing such operation are described. In the method, a wet scrubber is provided which...
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6277344 |
Simultaneous use of peroxygen and olefin compound in odor reduction
Disclosed is a process for the treatment of a plant fluid effluent containing odor compounds including an alkyl mercaptan or an alkyl thiol, an amine compound, ammonia, hydrogen sulfide and...
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6277343 |
Flue gas scrubbing method and apparatus therefor
An apparatus and process for removing acidic gases, such as sulfur dioxide, hydrogen chloride and hydrogen fluoride, from flue gases produced by processing operations of the type carried out in...
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6235961 |
Process for pretreating cracked gas before caustic tower treatment in ehtylene plants
An inline, high-shear mixer is provided in a cracked gas stream upstream of a caustic tower in an ethylene production unit. Spent caustic is withdrawn from the bottom of the caustic tower and...
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