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| Number | Title | Issue Date |
| 7988766 | Metal oxide system for adsorbent applications Provided herein are adsorbents and methods of using the adsorbents to at least partially remove one or more adsorbates. In an aspect, an adsorbate within a phase is at least partially removed by providing an adsorbent material and contacting the adsorbent material w... | 08/02/2011 |
| 7431032 | Low power ambulatory oxygen concentrator An oxygen concentrator comprises a vacuum swing adsorption (VSA) gas separation system which includes a cartridge containing a mass of adsorbent material for producing oxygen, a drive which activates the gas separation system, and a power source comprising a mass. A... | 10/07/2008 |
| 7407528 | Method for operating an air fractionization installation for obtaining oxygen on board an aircraft The method serves for operating an air fractionization installation for obtaining oxygen on board an aircraft, with at least two molecular sieve chambers. A part mass flow of the oxygen obtained in the respective adsorbing molecular sieve chamber is supplied for flu... | 08/05/2008 |
| 7303683 | Microorganism-removing filter medium having high isoelectric material and low melt index binder A filter medium capable of removing microorganisms from a fluid such as water. The filter medium includes particles of activated carbon, particles of a substantially insoluble inorganic material having an isoelectric point greater than the fluid being filtered. A lo... | 12/04/2007 |
| 7282083 | Methods, systems, and uses for calixarenes A method of identifying, detecting and/or chemically using NOX compounds is provided, wherein calixarene complexes are exposed to a nitrogen-oxide gas containing samples and form calixarene-nitrosonium complexes that are readily identified and detectable.... | 10/16/2007 |
| 7264726 | Nanocrystal-containing filtration media The invention relates to filtration media having nanocrystals of metal oxides, encapsulated in or impregnated into a binder matrix, which binds together particles of activated carbon. The filtration media can be compressed into a filtration block, has low pressure d... | 09/04/2007 |
| 7258725 | Gas supplying method and system Gas supplying method and system in which effective component gas in exhaust gas can be separated and purified efficiently to be resupplied regardless of variation in the flow rate or composition of the exhaust gas and consumed gas can be replenished efficiently. In ... | 08/21/2007 |
| 7250150 | Chemical reactor with pressure swing adsorption A chemical reaction is performed with separation of the product(s) and reactant(s) by pressure swing adsorption (PSA), using an apparatus having a plurality of adsorbers cooperating with first and second valve assemblies in a PSA module. The PSA cycle is characteriz... | 07/31/2007 |
| 7238223 | Acoustical stimulation of vapor diffusion system and method 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 d... | 07/03/2007 |
| 7172645 | Gas filtration and storage using activated carbon/graphite foam monoliths An apparatus for separating a first gas from a mixture of the first gas and at least one second gas comprises a housing having an inlet port and an outlet port and an adsorbent which is positioned in the housing. The adsorbent comprising a carbon based foam monolith... | 02/06/2007 |
| 7171963 | Product pump for an oxygen concentrator A product pump for pumping separated product gas from an oxygen concentrator which produces oxygen-rich product gas by utilizing a vacuum swing adsorption (VSA) process. The oxygen concentrator comprises a cartridge containing an adsorbent material for separating th... | 02/06/2007 |
| 7144445 | Use of an adsorbent in solid foam form for the purification or separation of gases Process for purifying or separating a gas or gas mixture using a monolithic adsorbent for the separation or purification of gases or gas mixtures, having a cellular structure with open porosity in the form of a solid foam permeable to the gas molecules. The gas phas... | 12/05/2006 |
| 7114932 | Valve-free oxygen concentrator featuring reversible compressors A pivoting vane rotary compressor includes a housing having a generally pear-shaped chamber. A rotor mounted within the chamber defines a main and constricted chamber regions. Reversible intake and exhaust ports alternately introduce air into and exhaust air from th... | 10/03/2006 |
| 7074260 | Filter using carbon nanotube A filter for an air conditioner, including a carbon nanotube, wherein nano-sized metal particles of at least one type of metal are deposited into the carbon nanotube. ... | 07/11/2006 |
| 7022160 | Method of purifying gaseous nitrogen trifluoride The present invention relates to a method of purifying gaseous nitrogen trifluoride from CF4 as impurity. The method comprises selective adsorption of nitrogen trifluoride by dehydrated erionite at a temperature of from −30 to 30° C., displaceme... | 04/04/2006 |
| 6997976 | Filtering devices The invention provides a low-resistance gas adsorption filter provided with an activated carbon bed of bulk density less than 0.6 gram/cubic centimeter, the activated carbon bed being free of chromium 6+ salt, the filter being characterized by a gas holding capacity... | 02/14/2006 |
| 6869463 | Method for rapid activation or preconditioning of porous gas purification substrates A method is described for rapid and economical activation and/or preconditioning of gas purification substrates by providing forced convection of the preconditioning or activating gas through the pores of the substrate. The gas is pumped into the substrate-containin... | 03/22/2005 |
| 6863713 | Method to adsorb an adsorbate using modified carbonaceous material An adsorbent composition containing a modified carbonaceous material capable of adsorbing an adsorbate is disclosed, wherein at least one organic group is attached to the carbonaceous material. Furthermore, methods to increase the adsorption capacity of a carbonaceo... | 03/08/2005 |
| 6837917 | Process for the removal of ethylene oxide from air A process for removal of ethylene oxide (EO) from ambient air laden with EO is passed through a zeolite-based removal media, which preferrably consists of the acid form of zeolite ZSM-5, herein referred to as “H-ZSM-5.” The process described herein may be applie... | 01/04/2005 |
| 6660165 | Method for regenerating inorganic porous particles, method for purifying water, and continuous water purification device The present invention is to provide a method for regenerating inorganic porous particles, a method for purifying water and a continuous water purification device, which can be easily applied as a recycling system of water in special environments such as s... | 12/09/2003 |
| 6660066 | Ammonia recovery from purge gas The invention relates to ammonia synthesis loops containing gases, which do not react and would accumulate if they were not purged out. By the present invention ammonia in a purge gas is recovered by an absorption agent operating at the full synthesis loo... | 12/09/2003 |
| 6638341 | Method for rapid activation or preconditioning of porous gas purification substrates A method is described for rapid and economical activation and/or preconditioning of gas purification substrates by providing forced convection of the preconditioning or activating gas through the pores of the substrate. The gas is pumped into the substrat... | 10/28/2003 |
| 6511528 | Purification of carbon dioxide Commonly available carbon dioxide may contain unacceptable amounts of compounds containing greater than about ten carbon atoms, sulfur-containing materials, and nitrogen-containing materials which are particularly detrimental to semiconductor and silicon ... | 01/28/2003 |
| 6425939 | Process for the production of hydrogen using a carbonated adsorbent with selected dubinin parameters A process for the purification of a gaseous hydrogen flow containing one or more gaseous impurities from the group consisting of carbon monoxide, water vapor, nitrogen, H2 S, chlorine, C1 -C3 light alcohols, ammonia, carbo... | 07/30/2002 |
| 6402819 | Fresh air filter The present invention relates to a fresh air filter that comprises a highly air-permissive two- or three-dimensional support made of a cross-linked polymeric foam which includes pores of large dimensions. The support comprises joining portions which are c... | 06/11/2002 |
| 6387161 | Nitrous oxide purification system and process Provided are a system and method for nitrous oxide purification, wherein the nitrous oxide product for use in semiconductor manufacturing. The system and process involve a first sub-system having a purification tank for holding a liquefied nitrous oxide, ... | 05/14/2002 |
| 6358302 | Purification of gases using multi-composite adsorbent The present invention provides for a multi-composite adsorbent mixture which will remove H2 O, CO2 and nitrogen oxides and/or hydrocarbons from a feed gas stream. The improvement lies in the use of a third adsorbent which is selectiv... | 03/19/2002 |
| 6332916 | Activated carbon filter and process for the separation of noxious gases Activated carbon filters containing transition metals, are prepared by (a) exchanging the transition metal with a cellulose ion exchange material to produce a cellulose material containing the transition metal; (b) charring of the product of (a); activati... | 12/25/2001 |
| 6224677 | Gas recovery unit utilizing dual use of gas A CVD device A is provided which is equipped with a gas introduction part A3 having an inert gas supply part G1 for supplying a diluting inert gas and a cleaning gas supply path G2 for supplying a cleaning gas, each connected therewith, and equipped with ... | 05/01/2001 |
| 6136071 | Process for the recovery of volatile low molecular compounds 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 ... | 10/24/2000 |
| 6113673 | Gas storage using fullerene based adsorbents This invention is directed to the synthesis of high bulk density high gas absorption capacity adsorbents for gas storage applications. Specifically, this invention is concerned with novel gas absorbents with high gravimetric and volumetric gas adsorption ... | 09/05/2000 |
| 6093236 | Porous pellet adsorbents fabricated from nanocrystals Pelletized adsorbent compositions and methods of adsorbing toxic target compounds are provided for the destructive adsorption or chemisorption of toxic or undesired compounds. The pelletized adsorbents are formed by pressing together powder nanocrystallin... | 07/25/2000 |
| 6090738 | Process for the preparation of a molecular sieve adsorbent for selectively adsorbing methane from a gaseous mixture This invention relates to the manufacture of a molecular sieve adsorbent for selectively separating methane from its gaseous mixture with nitrogen. More particularly, the invention relates to the manufacture of novel molecular sieve adsorbents useful for ... | 07/18/2000 |
| 6027547 | Fluid storage and dispensing vessel with modified high surface area solid as fluid storage medium A fluid storage and dispensing system, comprising: a fluid storage and dispensing vessel constructed and arranged for selective dispensing of fluid therefrom; a solid-phase support in the vessel; and an affinity medium on the solid-phase support, wherein ... | 02/22/2000 |
| 5997613 | Gas phase adsorption process utilizing oxidized pitch-based activated carbon fibers A gas phase adsorption process in which a gas phase containing water vapor or a basic gas is brought into contact with activated carbon fiber to adsorb the water vapor or basic gas. The activated carbon fiber comprises pitch-based oxidized activated carbo... | 12/07/1999 |
| 5968232 | Method for ammonia production A process for the separation of ammonia dissolved in a gaseous solvent is used to recover ammonia during the production of ammonia from a synthesis gas. The process may be used to extract and recover ammonia in either the supercritical region or the subcr... | 10/19/1999 |
| 5919286 | PSA process for removel of nitrogen oxides from gas A process for removing nitrogen oxides, as well as water and carbon dioxide, from gas streams containing at least 0.2 ppm by volume of nitrogen oxides by passing the gas stream through an alumina adsorbent and a zeolite adsorbent, preferably 13X-zeolite. ... | 07/06/1999 |
| 5897687 | Ammonia adsorption apparatus Disclosed is an ammonia adsorption apparatus for removing ammonia contained in a treated gas discharged from a denitrator for decomposing nitrogen oxides present in exhaust gas using ammonia as a reducing agent, comprising at least two adsorption towers i... | 04/27/1999 |
| 5759237 | Process and system for selective abatement of reactive gases and recovery of perfluorocompound gases Processes and systems to recover at least one perfluorocompound gas from a gas mixture are provided. In one embodiment the inventive process comprises the steps of a) providing a gas mixture comprising at least one perfluorocompound gas and at least one c... | 06/02/1998 |
| 5711926 | Pressure swing adsorption system for ammonia synthesis The present invention is directed to a catalytic process for the synthesis of ammonia in an ammonia synthesis reactor wherein a dilute ammonia stream is withdrawn from the reactor and subjected to a treatment step to concentrate ammonia adsorbed (or extra... | 01/27/1998 |
