Nitrogen Or Nitrogen Containing Compound Sorbed Patents (Class 95/232)
-
Patent number: 7850761Abstract: There is provided an apparatus for highly purifying nitric oxide by removing impurities included in nitric oxide, which comprises: a number of dehumidifiers connected to one another in a series, to remove water and carbon dioxide from the nitric oxide; a vaporizing and liquefying unit for respectively separating impurities into a gaseous state and a liquid state by cooling the nitric oxide which passed through the dehumidifiers at sub-zero temperatures; a storage tank for storing highly purified nitric oxide separated by the vaporizing and liquefying unit; an exhaust pump for discharging gaseous impurities, separated by the vaporizing and liquefying unit, to a scrubber; an outlet for discharging liquid impurities, separated by the vaporizing and liquefying unit, to the scrubber; and the scrubber 50 for purifying the gaseous and liquid impurities.Type: GrantFiled: March 23, 2007Date of Patent: December 14, 2010Assignee: Wonikmurtrealize Co., Ltd.Inventors: Jun-Youl Lee, Bong-Soo Seo
-
Patent number: 7846240Abstract: A method and system for reducing an amount of ammonia in a flue gas stream. The system 100 includes: a wash vessel 180 for receiving an ammonia-containing flue gas stream 170, the wash vessel 180 including a first absorption stage 181a and a second absorption stage 181b, each of the first absorption stage 181a and the second absorption stage 181b having a mass transfer device 184; and a liquid 187 introduced to the wash vessel 180, the liquid 187 for absorbing ammonia from the ammonia-containing flue gas stream 170 thereby forming an ammonia-rich liquid 192 and a reduced ammonia containing flue gas stream 190 exiting the wash vessel 180.Type: GrantFiled: September 9, 2009Date of Patent: December 7, 2010Assignee: ALSTOM Technology LtdInventors: Eli Gal, Indira Jayaweera
-
Patent number: 7754172Abstract: The present invention relates to a process for purifying a gas mixture G-0 comprising dinitrogen monoxide, at least comprising the absorption of the gas mixture G-0 in an organic solvent, subsequent desorption of a gas mixture G-1 from the laden organic solvent, absorption of the gas mixture G-1 in water and subsequent desorption of a gas mixture G-2 from the laden water, and also to the use of a purified gas mixture which comprises dinitrogen monoxide and is obtainable by such a process as an oxidizing agent for olefins.Type: GrantFiled: November 21, 2006Date of Patent: July 13, 2010Assignee: BASF AktiengesellschaftInventors: Joaquim Henrique Teles, Beatrice Roessler, Dieter Baumann
-
Patent number: 7736420Abstract: The invention relates to an improvement in apparatus and process for the formation of a complex of Lewis acidic or Lewis basic gases in a reactive liquid of opposite character and for the breaking (fragmentation) of said complex associated with the recovery of the Lewis gas therefrom. The improvement resides in forming finely divided droplets of reactive liquid and controlling the temperature, pressure and concentration of said Lewis gas of opposite character to provide for (a) the formation of said complex between said gas and reactive liquid or (b) the breaking of said complex and the recovery of the atomized droplets of reactive liquid.Type: GrantFiled: May 19, 2006Date of Patent: June 15, 2010Assignee: Air Products and Chemicals, Inc.Inventors: Wayne Thomas McDermott, Philip Bruce Henderson, Daniel Joseph Tempel, Ronald Martin Pearlstein, James Joseph Hart, Rosaleen Patricia Morris-Oskanian, Diwakar Garg
-
Publication number: 20100089232Abstract: The invention relates to a gas liquid contactor and effluent cleaning system and method and more particularly to individually fed nozzle banks including an array of nozzles configured to produce uniformly spaced flat liquid jets shaped to minimize disruption from a gas. An embodiment of the invention is directed towards a gas liquid contactor having a plurality of modules including a liquid inlet and outlet and a gas inlet and outlet. An array of nozzles is in communication with the liquid inlet and the gas inlet. The array of nozzles is configured to produce uniformly spaced flat liquid jets shaped to minimize disruption from a gas flow and maximize gas flow and liquid flow interactions while rapidly replenishing the liquid.Type: ApplicationFiled: September 28, 2009Publication date: April 15, 2010Applicant: Neumann Systems Group, IncInventors: David Kurt Neumann, Keith R. Hobbs, Jeffrey L. Courtright
-
Publication number: 20100083831Abstract: A method and system for reducing an amount of ammonia in a flue gas stream. The system 100 includes: a wash vessel 180 for receiving an ammonia-containing flue gas stream 170, the wash vessel 180 including a first absorption stage 181a and a second absorption stage 181b, each of the first absorption stage 181a and the second absorption stage 181b having a mass transfer device 184; and a liquid 187 introduced to the wash vessel 180, the liquid 187 for absorbing ammonia from the ammonia-containing flue gas stream 170 thereby forming an ammonia-rich liquid 192 and a reduced ammonia containing flue gas stream 190 exiting the wash vessel 180.Type: ApplicationFiled: September 9, 2009Publication date: April 8, 2010Applicant: ALSTOM TECHNOLOGY LTD.Inventors: Eli Gal, Indira Jayaweera
-
Patent number: 7682425Abstract: The invention relates to a method for removing ammonia and dust from a waste gas that occurs during the production of fertilizers, preferably urea, in which method the waste gas is introduced into a first washer, and a cooling gas is introduced into the one washer and an aqueous solution is introduced into the other washer, whereby both the waste gas and the cooling gas pass through at least one mist collector before exiting from the washer, in each instance, is supposed to be developed further in such a manner that the waste gas pollution can be clearly reduced. This is accomplished in that the additional water is first introduced into a fine-washing area of the first washer, delimited by the mist collector on the top and by a liquid-impermeable partition bottom at the bottom, and sprayed onto the at least one mist collector, and the aqueous solution that forms in the fine-washing area is subsequently passed into the second washer.Type: GrantFiled: September 4, 2004Date of Patent: March 23, 2010Assignee: Uhde GmbHInventors: Paul Niehues, Harald Franzrahe
-
Publication number: 20100024648Abstract: An ammonia contact scrubber system (10) for removing ammonia from a fuel stream for a fuel cell (16) includes a contact scrubber (12) having a scrubber fuel inlet (14) and a scrubber fuel exhaust (20) for directing flow of the fuel stream through support material (24) within the scrubber (12) and into the fuel cell (16). An acid circulating loop (26) has an acid holding tank (28) holding a liquid acid solution (30), an acid feed line (32) secured in fluid communication between the holding tank (28) and a scrubber acid inlet (36) of the contact scrubber (12), an acid return (38) for returning the acid solution from the scrubber (12) to the acid holding tank (28), and an acid circulation pump (42) for pumping the acid solution (30) through the acid circulating loop (26) and through the support material (24) within the scrubber (12).Type: ApplicationFiled: December 20, 2006Publication date: February 4, 2010Inventor: Richard D. Breault
-
Publication number: 20100005967Abstract: Carbon dioxide, methane, nitrous oxide and three groups of fluorinated gases have been referred to as greenhouse gases and the most offensive gases in contributing to Global Warming This invention comprises the use of Titration and other chemical oxidation—reduction reactions in novel ways to scrub these gases from the Earth's atmosphere. The invention comprises identifying, developing, and spraying base aerosols to neutralize carbon dioxide, nitrous oxide, sulphur dioxide, and similar compounds whose oxides form acids when dissolved in water vapor. Acid-base titrations result in neutralization of the acid and the base. The formation of a salt and water typically are by-products. Salt precipitates such as CACO3—calcium carbonate or limestone settle into the oceans naturally forming limestone deposits which act as homes for microscopic sea life. Carbonic acid which results from CO2 being dissolved in water produces calcium carbonate when treated with a base.Type: ApplicationFiled: March 19, 2007Publication date: January 14, 2010
-
Publication number: 20100000405Abstract: A method of treating exhaust gases is described comprising the introduction of a treatment composition including or comprising a micelle encapsulating compound. A preferred embodiment the treatment comprises by volume; from about 4 to about 40 parts of an alkoxylated C16-C18 tertiary amine surfactant, from about 1 to about 15 parts of at least one carboxylic acid having from 4 to 16 carbon atoms; about 1 to 6 parts of at least one of a C6-C14 alcohol, from 0 to 10 parts of a C4 and lower alcohol, with the balance being water to create a total of about 100 parts by volume. The treatment composition may be introduced into a confined flow path for exhaust gases at a rate of 0.1 to 6% although a range above and below that may be suitable. The invention also extends to a system for treating exhaust gases comprising a confined flow path for the exhaust gases and an application arrangement for applying a treatment composition comprising or including a micelle encapsulating surfactant.Type: ApplicationFiled: May 25, 2007Publication date: January 7, 2010Applicant: Green Leader Technologies Pty Ltd.Inventors: Michael Thomas Greiner, Grahame Peter Higgs, Robert Cunningham Gardiner, Inia Wharengarangi Timu
-
Patent number: 7625432Abstract: A process for the reduction of carbonyl sulfide (COS) in a gas stream is described. It comprises contacting the gas stream with an iron oxide-based material. The present invention relates to the removal of COS from any type of gas stream, in particular those which include one or more of the group comprising ethane, methane, hydrogen, carbon dioxide, hydrogen cyanide, ammonia, hydrogen sulfide, and noble gases. These include natural gas, and in particular syngas. Syngas is useable in a Fischer-Tropsch process. The present invention provides a simple but effective process for the reduction of COS, especially with a material that can easily be located in existing guard beds—avoiding any re-engineering time and costs. The iron oxide-based materials can also be useable against other impurities, providing a single bed solution.Type: GrantFiled: May 22, 2006Date of Patent: December 1, 2009Assignee: Shell Oil CompanyInventors: Rudolf Robert Gouman, Rudolf Henri Max Herold, Thijme Last, Bernardus Josephus Maria Manshande, Cornelis Jacobus Smit
-
Publication number: 20090291874Abstract: The present application discloses compositions comprising ionic liquids and an amine compound, and methods for using and producing the same. In some embodiments, the compositions disclosed herein are useful in reducing the amount of impurities in a fluid medium or a solid substrate.Type: ApplicationFiled: May 21, 2009Publication date: November 26, 2009Inventors: Jason E. Bara, Dean E. Camper, Richard D. Noble, Douglas L. Gin
-
Patent number: 7563307Abstract: A process for separating the components of a multi-component gas stream is disclosed. The multi-component gas stream is contacted with a solvent in an extractor to produce an overhead stream enriched with unabsorbed component(s) and a rich solvent bottoms stream enriched with absorbed component(s). The rich solvent bottoms stream is then flashed at reduced pressure to regenerate lean solvent and to recover the absorbed component(s) as an overhead stream. The regenerated solvent is recycled to the extractor. A portion of the circulating solvent comprises external solvent added to the system. A second portion of the circulating solvent comprises internal solvent contained in the feed gas.Type: GrantFiled: August 23, 2005Date of Patent: July 21, 2009Assignee: Advanced Extraction Technologies, Inc.Inventor: Thomas K. Gaskin
-
Publication number: 20090095155Abstract: Methods and systems for handling sour carbon dioxide (CO2) streams are provided. In one aspect, a method for sequestering an emissions-heavy gas includes removing at least a portion of an acid gas from a rich solvent in an acid gas stripper to create the emissions-heavy gas, and channeling the emissions-heavy gas to a storage system.Type: ApplicationFiled: October 10, 2007Publication date: April 16, 2009Inventors: Arnaldo Frydman, Pradeep Thacker, Sachin Naphad, Aaron John Avagliano
-
Publication number: 20080210092Abstract: Method and apparatus for separating acid gas from a natural gas stream. The method includes the steps of: contacting the natural gas stream with a semi-lean amine solution and a lean amine solution to produce a rich amine solution, separating a first portion of carbon dioxide from the rich amine solution to produce the semi-lean amine solution, and heating a portion of the semi-lean amine solution to separate a second portion of carbon dioxide and produce the lean amine solution. The rich amine solution and semi-lean amine solution are heated from using recovered waste heat derived from one or more of a land based facility or an off-shore facility located on a platform or floating vessel.Type: ApplicationFiled: February 1, 2008Publication date: September 4, 2008Applicant: CHEVRON U.S.A. INC.Inventors: John J. Buckles, Anthony P. Eaton, Kaman I. Chan
-
Patent number: 7416582Abstract: A cyclic process for the removal of NOx from a NOx containing feed gas, and optionally removal mercury vapour and/or sulfur dioxide is provided. A process is also provided by which an iron chelate absorbent may be thermally regenerated.Type: GrantFiled: August 22, 2005Date of Patent: August 26, 2008Assignee: Cansolv Technologies Inc.Inventors: Leo E. Hakka, Michel A. Ouimet, John Nicolas Sarlis, Colin Francis Ryan
-
Patent number: 7238223Abstract: An apparatus for removing constituents from a fluid stream is provided. The apparatus includes a duct, a collection device, a sorbent injector, and an acoustic generator. The duct has a fluid passageway to receive a fluid stream having constituents. The collection device filters the fluid stream. The sorbent injector injects a sorbent in the fluid passageway of the duct. The acoustic generator generates an acoustic field in the fluid passageway of the duct to promote sorption of the constituents for collection by the collection device. Additionally, a method is provided for removing constituents from a fluid stream.Type: GrantFiled: November 3, 2003Date of Patent: July 3, 2007Assignee: Board of the Regents, The University of Texas SystemInventor: G. Douglas Meegan, Jr.
-
Patent number: 6989047Abstract: The invention relates to a process for the absorptive separation of NH3 and CH4 from a gas under high pressure, which at least contains NH3, H2, N2 and CH4, using a high-boiling, physically acting and regenerable solvent which contains homologues of alkylene glycol-alkyl-ether and which also may contain water, the absorbed components NH3, H2, N2 and CH4 being separated from the laden solvent in at least two further process steps at different pressure rates, thereby withdrawing at least one NH3-rich and at least one CH4-rich gas fraction from the solvent. This process is particularly suitable to be incorporated as unit in an ammonia production plant.Type: GrantFiled: April 5, 2002Date of Patent: January 24, 2006Assignee: Uhde GmbHInventors: Michael Wyschofsky, Vincent Liu
-
Patent number: 6881243Abstract: A method for removing acidic gases from waste gases is disclosed. The invention relates to a method for removing acid gases, in particular from SO2 and NOx, by contacting the waste gas with an emulsion of water in organic sulfoxides, in particular of water in oil-derived-sulfoxides. The organic sulfoxide phase can be regenerated after the emulsion is loaded with polluants, by letting the emulsion to settle down and separate into two phases. The aqueous phase obtained after the separation contains sulfate and nitrate ions which can be collected and used as valuable chemicals.Type: GrantFiled: October 6, 2000Date of Patent: April 19, 2005Assignee: Lextran Ltd.Inventors: Adolf Khitrik, Gregori Pipko, Benjamin Doron
-
Patent number: 6869466Abstract: In accordance with the invention, there is provided a method of binding a gas or volatile compound in a cucurbituril, by contacting the gas or volatile compound with the cucurbituril to form a cucurbituril-gas/volatile complex. There is also provided a method of separating a gas or volatile compound from a mixture of compounds wherein the mixture is contacted with a cucurbituril and whereby at least some of the gas or volatile compound is bound to the cucurbituril to form a cucurbituril complex, followed by the release of at least some of the bound gas or volatile compound from that complex. The present invention is thus advantageous in that it allows use of cucurbiturils in binding gases and volatile compounds for storage, safety, delivery or other uses, such as the trapping of an unpleasant or toxic gas or volatile compound.Type: GrantFiled: November 22, 2002Date of Patent: March 22, 2005Assignee: Unisearch LimitedInventors: Anthony Ivan Day, Alan Peter Arnold, Rodney John Blanch
-
Publication number: 20040139856Abstract: The invention relates to a process for the absorptive separation of NH3 and CH4 from a gas under high pressure, which at least contains NH3, H2, N2 and CH4, using a high-boiling, physically acting and regenerable solvent which contains homologues of alkylene glycol-alkyl-ether and which also may contain water, the absorbed components NH3, H2, N2 and CH4 being separated from the laden solvent in at least two further process steps at different pressure rates, thereby withdrawing at least one NH3-rich and at least one CH4-rich gas fraction from the solvent. This process is particularly suitable to be incorporated as unit in an ammonia production plant.Type: ApplicationFiled: March 11, 2004Publication date: July 22, 2004Inventors: Michael Wyschofsky, Vincent Liu
-
Patent number: 6706093Abstract: A method which reduces iron contamination of a system which receives ammonia from an ammonia recovery process by one or more of the following techniques: a) Physically separating iron oxide, iron containing colloidal particles, and liquid droplets from the gas stream; b) Preventing AC from depositing on piping via elimination of condensation, thereby preventing corrosion of the piping; or c) Installing piping and equipment that is not susceptible to corrosive attack by AC, thereby eliminating the source of iron contamination.Type: GrantFiled: May 2, 2001Date of Patent: March 16, 2004Assignee: Rohm and Haas CompanyInventors: Abraham Benderly, Michael Stanley DeCourcy, Ronald Eugene Myers
-
Patent number: 6585807Abstract: An object of the present invention is to carry out separation recovery of ammonia efficiently from a gaseous mixture containing ammonia and carbon dioxide, without generating a solid ammonium carbamate. A recovery method of ammonia from a gaseous mixture, includes a process (I) in which a gaseous mixture containing ammonia and carbon dioxide is contacted with an organic solvent to allow the organic solvent to absorb ammonia in the gaseous mixture, and a process (II) in which the organic solvent which absorbed ammonia is distilled to separate ammonia from the organic solvent.Type: GrantFiled: April 30, 2001Date of Patent: July 1, 2003Assignee: Mitsubishi Gas Chemical Company, Inc.Inventors: Hiroshi Umino, Nobuyasu Chikamatsu, Hirofumi Ito, Masamichi Mizukami
-
Publication number: 20020124728Abstract: A method which reduces iron contamination of a system which receives ammonia from an ammonia recovery process by one or more of the following techniques:Type: ApplicationFiled: May 2, 2001Publication date: September 12, 2002Inventors: Abraham Benderly, Michael Stanley DeCourcy, Ronald Eugene Myers
-
Patent number: 6398851Abstract: Exhaust gases from an internal combustion engine operating with leaded or unleaded gasoline or diesel or natural gas, are used for energizing a high-speed gas turbine. The convoluting gas discharge causes a first separation stage by stratifying of heavier and lighter exhaust gas components that exit from the turbine in opposite directions, the heavier components having a second stratifying separation in a vortex tube to separate combustible pollutants from non-combustible components. The non-combustible components exit a vortex tube open end to atmosphere. The lighter combustible, pollutants effected in the first separation are bubbled through a sodium hydroxide solution for dissolving the nitric oxide, formaldehyde impurities in this gas stream before being piped to the engine air intake for re-combustion, thereby reducing the engine's exhaust pollution and improving its fuel economy. The combustible, heavier pollutants from the second separation stage are piped to air filter assemblies.Type: GrantFiled: September 7, 2000Date of Patent: June 4, 2002Inventor: Ranendra K. Bose
-
Patent number: 6383257Abstract: An apparatus and process for separating perfluorocarbon compounds from a gas mixture passes an incoming stream of a gas into a cold trap, the gas stream including a plurality of perfluorocarbon compounds. The gas mixture is cooled within the cold trap to a temperature below −100° C. to produce a condensate that is enriched in at least one perfluorocarbon compound and a non-condensed stream from which the condensate was separated. The condensate is withdrawn from the cold trap. The condensate may be withdrawn by warming the cold trap to vaporize the condensate and thereafter flowing the vaporized condensate into a storage vessel. The non-condensed stream may be vented to the atmosphere, re-circulated into the cold trap or flowed through subsequent separation processes to extract additional perfluorocarbon compounds.Type: GrantFiled: April 4, 2000Date of Patent: May 7, 2002Assignee: Air Products and Chemicals, Inc.Inventors: Wayne Thomas McDermott, Richard Carl Ockovic, Alexander Schwarz, Rakesh Agrawal
-
Publication number: 20020002905Abstract: An object of the present invention is to carry out separation recovery of ammonia efficiently from a gaseous mixture containing ammonia and carbon dioxide, without generating a solid ammonium carbamate. A recovery method of ammonia from a gaseous mixture, includes a process (I) in which a gaseous mixture containing ammonia and carbon dioxide is contacted with an organic solvent to allow the organic solvent to absorb ammonia in the gaseous mixture, and a process (II) in which the organic solvent which absorbed ammonia is distilled to separate ammonia from the organic solvent.Type: ApplicationFiled: April 30, 2001Publication date: January 10, 2002Inventors: Hiroshi Umino, Nobuyasu Chikamatsu, Hirofumi Ito, Masamichi Mizukami
-
Patent number: 6237368Abstract: A method for regulating or controlling the content of NOx in the exhaust gases of a glass-melting furnace having several burners operated in alternation, wherein both the beginning and the end of a combustion break (FP+, FP−) are supplied to a binary signal generator (8) which passes a signal to a regulator (4) with a time delay and upon receipt of the time-regulator (4), and the amount of NH3 supplied to the denitrating plant is adjusted to a lower constant fixed value F1 via a control, and by means of a memory element (7) a higher constant fixed value F2 is calculated as amount of NH3 and supplied to the regulator (4), whereupon as soon as the regulator (4) has received the signal of the time-delayed end of a combustion break, the fixed value F1 is adjusted to the fixed value F2 via a control, and subsequently the regulation is directly continued.Type: GrantFiled: August 30, 1999Date of Patent: May 29, 2001Assignee: Metallgesellschaft AktiengesellschaftInventors: Hans Beisswenger, Klaus Hasselwander, Hansjörg Herden, Gernot Mayer-Schwinning, Gurudas Samant, Peter Ludwig
-
Patent number: 6136071Abstract: A process for recovering volatile, generally bad smelling low molecular, low polar substances called VLC, contained in gas streams, by capturing the same by in contacting the gaseous environment with a calixarene or a resorcinol calixarene present in the form of particles, granules, as a coating or impregnation on or in a solid support, or as an organic or aqueous solution.Type: GrantFiled: August 27, 1998Date of Patent: October 24, 2000Assignee: Transdiffusia S.A.Inventors: Roger Lamartine, Philippe Choquard, Philippe Goreloff, Yvon Martelin
-
Patent number: 6027552Abstract: A method for reducing residual ammonia gas from a steam in a steam condenser. The method includes forming a condensate and a residual gas in a first stage, then forming a condensate curtain in the second stage and passing the residual gas through the condensate curtain prior to exiting the steam condenser. The method may be employed to remove ammonia and carbon dioxide gas from a geothermal steam.Type: GrantFiled: March 30, 1998Date of Patent: February 22, 2000Assignee: Graham CorporationInventors: Donald Neal Ruck, James Richard Lines, Roderick Elwyn Athey, David William Tice
-
Patent number: 6001223Abstract: Highly purified ammonia for use in semiconductor manufacturing is prepared on-site by drawing ammonia vapor from a liquid ammonia reservoir, passing the vapor through a filter capable of filtering out particles of less than 0.005 micron in size, and scrubbing the filtered vapor in a high-pH aqueous scrubber.Type: GrantFiled: March 10, 1998Date of Patent: December 14, 1999Assignee: Air Liquide America CorporationInventors: Joe G. Hoffman, R. Scot Clark
-
Patent number: 5961837Abstract: Water to be utilized is reacted with soda ash and lime to produce a less corrosive and foulant water. Reaction sludges are fed to a desulfurization unit, where SO.sub.x, NO.sub.x and CO.sub.2 abatement occurs; other industrial waste sludges and/or waters and/or gases can also be utilized in such connection. FIG. 1 is one of the possible process schemes of present invention.Type: GrantFiled: June 20, 1997Date of Patent: October 5, 1999Inventors: Marcello Ferrara, Maria Gabriella Scopelliti
-
Patent number: 5928413Abstract: This invention provides a flue gas treating system and process which include a counterflow absorption tower and which can reduce the ammonia concentration in the treated flue gas to a low level.Type: GrantFiled: September 11, 1997Date of Patent: July 27, 1999Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Eiji Ochi, Kiyoshi Okazoe, Toru Takashina
-
Patent number: 5858124Abstract: A high-resistance rare earth magnet having a metal structure in which a rare earth magnet phase is dispersed throughout a compound phase comprising at least one compound selected from the group consisting of fluorides and oxides of Li, Na, Mg, Ca, Ba and Sr. The fluorides and oxides are effective for increasing the electrical resistance of a rare earth magnet to a level sufficient for practical use while maintaining high magnetic properties of the magnet.Type: GrantFiled: October 30, 1996Date of Patent: January 12, 1999Assignee: Hitachi Metals, Ltd.Inventors: Minoru Endo, Mitsuaki Mochizuki, Nobuhiko Fujimori
-
Patent number: 5772709Abstract: A geothermal steam condenser for reducing residual ammonia gas from a geothermal steam. The present condenser includes a column attached to the condenser for forming a curtain of temperature conditioned condensate, such that residual ammonia gas is passed through the conditioned water curtain to be furthered absorbed prior to exiting the geothermal steam condenser.Type: GrantFiled: April 18, 1996Date of Patent: June 30, 1998Assignee: Graham CorporatiomInventors: Donald Neal Ruck, James Richard Lines, Roderick Elwyn Athey, David William Tice
-
Patent number: 5744009Abstract: An improved urea recovery process is presented. In the improved process, multiple vacuum rated surface condensers used to condense water vapor evolved during urea vacuum evaporation/concentration are replaced by a direct contact cooler/absorber to obtain substantial capital and utility cost savings. Improved heat exchange efficiency of the present process significantly reduces cooling water usage in comparison to the surface condensers.Type: GrantFiled: July 7, 1995Date of Patent: April 28, 1998Assignee: The M. W. Kellogg CompanyInventors: Vishnu Deo Singh, Richard Bruce Strait, Thomas Anthony Czuppon
-
Patent number: 5720872Abstract: A process for hydroprocessing liquid petroleum and chemical streams in two or more hydroprocessing stages, which stages are in separate reaction vessels and wherein each reaction stage contains a bed of hydroprocessing catalyst. The liquid product from the first reaction stage is sent to a stripping stage and stripped of H.sub.2 S, NH.sub.3 and other dissolved gases. The stripped product stream is then sent to the next downstream reaction stage, the product from which is also stripped of dissolved gases and sent to the next downstream reaction stage until the last reaction stage, the liquid product of which is stripped of dissolved gases and collected or passed on for further processing. The flow of treat gas is in a direction opposite the direction in which the reaction stages are staged for the flow of liquid. Each stripping stage is a separate stage, but all stages are contained in the same stripper vessel.Type: GrantFiled: December 31, 1996Date of Patent: February 24, 1998Assignee: Exxon Research and Engineering CompanyInventor: Ramesh Gupta
-
Patent number: 5705052Abstract: A process for hydroprocessing liquid petroleum and chemical streams in a single reaction vessel containing two or more hydroprocessing reaction stages. The liquid product from the first reaction stage is stripped of H.sub.2 S, NH.sub.3 and other dissolved gases, then sent to the next downstream reaction stage. The product from the downstream reaction stage is also stripped of dissolved gases and sent to the next downstream reaction stage until the last reaction stage, the liquid product of which is stripped of dissolved gases and collected or passed on for further processing. The flow of treat gas is in a direction opposite the direction in which the reaction stages are staged for the flow of liquid.Type: GrantFiled: December 31, 1996Date of Patent: January 6, 1998Assignee: Exxon Research and Engineering CompanyInventor: Ramesh Gupta
-
Patent number: 5683587Abstract: Water to be utilized is reacted with soda ash and lime to produce a less corrosive and foulant water. Reaction sludges are fed to a desulfurization unit, where SO.sub.x, NO.sub.x and CO.sub.2 abatement occurs; other industrial waste sludges and/or waters and/or gases can also be utilized in such connection. FIG. 1 is one of the possible process schemes of the present invention.Type: GrantFiled: December 29, 1995Date of Patent: November 4, 1997Inventors: Marcello Ferrara, Maria Gabriella Scopelliti
-
Patent number: 5656151Abstract: A process for determining if intermittent water injection is the best way to remove deposits such as salts from refinery process streams. A water vapor pressure, P1, at stream conditions and a water vapor pressure, Ps, at saturation conditions in the stream, are used to calculate a ratio P1/Ps. If the ratio is less than 0.1 intermittent water washing is preferred. An optimized intermittent injection procedure, frequency, duration, and constraints, is disclosed. Chemical speciation calculations ensure that all accumulated salts are removed, and that an aqueous phase forms downstream of the water injection point having a salt concentration within acceptable limits.Type: GrantFiled: December 5, 1994Date of Patent: August 12, 1997Assignee: Mobil Oil CorporationInventors: Bruce D. McLaughlin, Yiing-Mei Wu
-
Patent number: 5656152Abstract: A continuous water washing process for removing salts from refinery process streams is disclosed. The salt and salt precursor content of a process stream is determined, and iterative calculations made to ensure an aqueous phase forms downstream of the water injection point with a salt and ion concentration within acceptable limits. Preferably chemical speciation calculations are used to check for corrosive, transient aqueous phases intermediate the point of water injection and the process outlet.Type: GrantFiled: December 5, 1994Date of Patent: August 12, 1997Assignee: Mobil Oil CoporationInventors: Bruce D. McLaughlin, Yiing-Mei Wu
-
Patent number: 5514204Abstract: A gas mixture comprised of nitric oxide and, optionally an inert gas, and containing small amounts of nitrogen dioxide, and perhaps moisture and sulfur dioxide, is purified by passing the gas stream through a bed of metal cation-free silica, alumina, or zeolite. The concentration of nitrogen dioxide, sulfur dioxide and moisture in the gas stream are significantly reduced as the gas mixture passes through the bed of adsorbent.Type: GrantFiled: July 7, 1994Date of Patent: May 7, 1996Assignee: The BOC Group, Inc.Inventors: Lien-Lung Sheu, Ramakrishnan Ramachandran, Theodore R. Galica
-
Patent number: 5376165Abstract: A method for treating a gas stream to remove heat, gaseous, liquid or particulate matter, or add heat, vapor, or moisture, which includes the steps of:providing a tower having a bed with fluidizable hollow ellipsoidal packing with a long semi-axis and a short semi-axis;introducing a liquid stream into the tower at a liquid flow rate L, and countercurrently introducing the gas stream into the tower at a gas flow rate G sufficient to maintain the bed in a fluidized state and a gas velocity v; andadjusting the volume ratio of the liquid flow to gas flow to cause the ellipsoidal packing to circulate predominantly in the vertical direction relative to the long semi-axis and to maintain a pressure gradient .DELTA.P/H.sub.o across the depth of the fluidized bed of at least about 1500 Pa/m, and, simultaneously, to satisfy the equation:L/G=K.sub.1 (.DELTA.P/H.sub.o v)+K.sub.2wherein L/G is the volume ratio of liquid to gas; .DELTA.P is the pressure drop across the bed; H.sub.Type: GrantFiled: June 14, 1993Date of Patent: December 27, 1994Assignee: Vereinigte Aluminium-Werke A.G.Inventors: Wolfram Ruff, Howard P. Davis
-
Patent number: RE35594Abstract: A method for treating a gas stream to remove heat, gaseous, liquid or particulate matter, or add heat, vapor, or moisture, which includes the steps of:providing a tower having a bed with fluidizable hollow ellipsoidal packing with a long semi-axis and a short semi-axis;introducing a liquid stream into the tower at a liquid flow rate L, and countercurrently introducing the gas stream into the tower at a gas flow rate G sufficient to maintain the bed in a fluidized state and a gas velocity v; andadjusting the volume ratio of the liquid flow to gas flow to cause the ellipsoidal packing to circulate predominantly in the vertical direction relative to the long semi-axis and to maintain a pressure gradient .DELTA.P/H.sub.o across the depth of the fluidized bed of at least about 1500 Pa/m, and, simultaneously, to satisfy the equation:L/G=K.sub.1 (.DELTA.P/H.sub.o v)+K.sub.2wherein L/G is the volume ratio of liquid to gas; .DELTA.P is the pressure drop across the bed; H.sub.Type: GrantFiled: November 21, 1995Date of Patent: August 26, 1997Assignees: VAW Aluminium A.G., Euro-Matic Ltd.Inventors: Wolfram Ruff, Howard P. Davis