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| Number | Title | Issue Date |
| 7625431 | Air dryers An air dryer for an air braking system of a vehicle, the air dryer comprising a mounting (20), and a removable desiccant canister (10) screw-threaded to said mounting (20) about a spin axis (25) and having a peripheral sealing ring (13... | 12/01/2009 |
| 7407530 | Filter assembly for a pneumatic tool A filter assembly for a pneumatic tool has an inner housing, a cover, an inner tube and a connecting post. The cover is attached to the inner housing and has a connecting portion and at least one air passage. The connecting portion has an inner space. The at least o... | 08/05/2008 |
| 7393381 | Removing siloxanes from a gas stream using a mineral based adsorption media A plurality of different layers of filter media are used to remove siloxanes from a gas stream. Based on an analysis of the specific gas stream to be filtered, a filter media having an average pore size enabling the preferential removal of a specific class of contam... | 07/01/2008 |
| 7264648 | Removing siloxanes from a gas using a segmented filtration system customized to the gas composition A plurality of different layers of filter media are used to remove siloxanes from a gas stream. Based on an analysis of the specific gas stream to be filtered, a filter media having an average pore size enabling the preferential removal of a specific class of contam... | 09/04/2007 |
| 7121276 | Personal oxygen concentrator An oxygen separator for separating oxygen from ambient air utilizing a vacuum swing adsorption process has a mass of less than 2.3 kg. A carrier is mountable on a person to support the oxygen separator for ambulatory use. ... | 10/17/2006 |
| 6689195 | Crystalline molecular sieve layers and processes for their manufacture A process is described for the manufacture of crystalline molecular sieve layers with good para-xylene over meta-xylene selectivity's good para-xylene permeances and selectivities. The process requires impregnation of the support prior to hydrothermal syn... | 02/10/2004 |
| 6669916 | Method and apparatus for purifying carbon dioxide feed streams Disclosed are a carbon dioxide purification process and apparatus including (i) an adsorbing step for removing a predetermined amount of hydrocarbons from a carbon dioxide feed gas to reduce the caloric value of the feed stream, and (ii) a catalytic oxida... | 12/30/2003 |
| 6641788 | Absorbent for a hydrocarbon, and exhaust gas-purifying catalyst An adsorbent for a hydrocarbon, comprising a calcined ଲ-type zeolite showing a powder X-ray diffraction such that the sum of X-ray diffraction intensities at lattice spacings d=1.15&#b1;0.03 nm and d=0.397&#b1;0.01 nm, is at least 90% of the diffrac... | 11/04/2003 |
| 6113676 | Deaerator for use in lubrication systems Deaerator for the treatment of oil returning from an oil circulating lubrication system before the oil returns into the oil tank (1), said deareator including an inlet container (2) acting as an air lock, in which the oil level is higher than the oil leve... | 09/05/2000 |
| 6106792 | Apparatus and method for cleaning gas A method and apparatus for removing TDI from a gas in which the gas containing the TDI is forced through a scrubber tank. A first water spray is in fluid communication with the gas flowing through an inlet pipe and initially reacts the TDI in the gas with... | 08/22/2000 |
| 6096116 | Reducing ignition risk for activated carbon A sorbent material, an activated carbon canister and a method are described which can be utilized to remove organic compounds from a vaporous stream with a relatively greater degree of safety, as compared to previously known methods. In the invention, ess... | 08/01/2000 |
| 6022399 | Process for the adsorption of organic substances in the air A process for regenerating an adsorber which adsorbs organic substances from the air in which the adsorber is heated by microwave energy to evaporate adsorbed organic substances on the adsorber. The adsorber is provided with enhanced microwave absorption ... | 02/08/2000 |
| 6017508 | Process of modifying the porosity of aluminosilicates and silicas, and mesoporous compositions derived therefrom A process of modifying the porosity of an aluminosilicate or silica whose porosity is not amenable to modification by acid extraction. The process involves contacting said aluminosilicate or silica with an alkali aluminate, and then extracting the alumina... | 01/25/2000 |
| 5964921 | Method and device for removing harmful substances, in particular, dioxin A method for removing harmful substances, in particular dioxin, from flue gas generated in for example a waste incinerator, using an adsorption agent, characterized in that after said flue gas has been washed with a washing medium, the adsorption agent is... | 10/12/1999 |
| 5908490 | Organic solvent recovering system and organic solvent recovering method A compact organic solvent recovery system includes a backup treatment apparatus for environmentally safe treatment of an organic solvent leaking into a gas exiting an adsorption tower packed with an adsorbing material such as particulate active charcoal o... | 06/01/1999 |
| 5895769 | In-situ crystallized zeolite containing composition (LAI-ISC) Applicant has discovered a new zeolite containing composition and a process for preparing the same. The composition is unique in that the zeolite crystals making up one layer of the composition pack in a manner such that the composition is essentially con... | 04/20/1999 |
| 5849980 | Low alkaline inverted in-situ crystallized zeolite membrane Applicant has discovered a new zeolite membrane and a process for preparing the same. The membrane is unique in that the zeolite crystals making up the membrane pack in a manner such that the membrane is essentially continuous with no large scale voids ev... | 12/15/1998 |
| 5733515 | Purification of air in enclosed spaces The present invention discloses an improved method for filtration of air within enclosed spaces. Improvement is achieved by the use of a high-temperature carbonaceous char that is catalytically active for the removal of certain undesirable constituents fr... | 03/31/1998 |
| 5702505 | Method for collecting volatile organic substances A method for collecting volatile organic substances from an off-gas containing moisture and volatile organic substances. The organic substances are removed from the gas containing the organic substances and the moisture by introducing the gas into an adso... | 12/30/1997 |
| 5700436 | Purification of air in enclosed spaces The present invention discloses an improved method for filtration of air within enclosed spaces. Improvement is achieved by the use of a high-temperature carbonaceous char that is catalytically active for the removal of certain undesirable constituents fr... | 12/23/1997 |
| 5695546 | Method for collecting volatile organic substances A method for collecting volatile organic substances from off-gas containing moisture and volatile organic substances. After the moisture has been removed by a dehumidifying tower filled with moisture absorbent for selectively adsorbing the moisture from t... | 12/09/1997 |
| 5620501 | Recovery of trace gases from gas streams Selected strongly adsorbed gaseous impurities are removed from a gas stream by pressure swing adsorption in an adsorption system which includes a single adsorption vessel, a gas storage vessel and a single gas pump. Feed gas is pumped at a selected adsorp... | 04/15/1997 |
| 5587084 | Method of removing organic contaminants from air and water with organophilic, quaternary phosphonium ion-exchanged smectite clays An quaternary phosphonium ion-exchanged clay and method of removing organic contaminants from air and/or water, by contacting the contaminants in the air or water with a quaternary phosphonium organo-clay. The clay is prepared by ion-exchange of an ion-ex... | 12/24/1996 |
| 5536301 | Methods for analysis of volatile organic compounds in water and air The purge and trap procedure commonly used for analysis of volatile organic compounds in water or air can be significantly improved using traps employing molecular sieves as adsorbents. Silicalite and potassium-exchanged dealuminated zeolite Y form an eff... | 07/16/1996 |
| 5368754 | Method for stripping contaminants from wastewater A method has been discovered for stripping aromatic hydrocarbon contaminants from wastewater and retaining the aromatic hydrocarbons on activated carbon. The wastewater is contacted countercurrently with stripping gas. The stripping gas is passed over a b... | 11/29/1994 |
| 5346535 | Use of crystalline molecular sieves containing charged octahedral sites in removing volatile organic compounds from a mixture of the same Crystalline molecular sieves containing octahedral sites such as the sieves known as ETS-4, ETS-10 and ETAS-10 are used to remove volatile organic compounds from a mixture of the same with moist air at ambient temperature.... | 09/13/1994 |
| 5294247 | Adsorption process to recover hydrogen from low pressure feeds The present invention is a process for recovering hydrogen from dilute refinery off gases using a vacuum swing adsorption process having a simultaneous cocurrent depressurization to provide purge gas for another bed under the influence of a vacuum and cou... | 03/15/1994 |
| 5281257 | System for increasing efficiency of vapor phase pollutant removal with on-site regeneration and pollutant recovery A vapor phase adsorption system employing an adsorbent for removing a volatile organic compound from an air stream to produce a purified air effluent in which the adsorbent first adsorbs the compound and is then regenerated by raising the temperature of t... | 01/25/1994 |
| 5246689 | Synthetic porous crystalline material its synthesis and use This invention relates to a composition of matter, e.g., silicoaluminate or metalloaluminosilicate, comprising an inorganic, porous crystalline phase material exhibiting, after calcination, an X-ray diffraction pattern with at least one peak at a d-spacin... | 09/21/1993 |
| 5209890 | Styrene scrubbing process for pipe and sewer liner method This invention relates to liners containing contaminants, such as styrene, and to methods for lining pipes, such as sewer pipes with liners containing contaminants, such as styrene. In one embodiment, this invention provides a liner and lining method that... | 05/11/1993 |
| 5187131 | Method for regenerating particulate adsorbents Method and apparatus for in-situ regeneration of particulate adsorbent in a vessel including: heating the adsorbent, passing inert gas through heated absorbent to collect vaporized adsorbate, chilling the inert gas to condense adsorbate, thereafter loweri... | 02/16/1993 |
| 5141533 | Method for filtering benzene from a gas stream The present invention relates to a method of filtering, at the end user's home, business or the like, a gas stream in which benzene has been concentrated at sufficient levels to be a significant health hazard. Steps of the invention include: (a) introduci... | 08/25/1992 |
| 5139542 | Method for filtering benzo-a-pyrene from a gas stream The present invention relates to a method of filtering, at the end user's home, business or the like, a gas stream in which benzo-a-pyrene has been concentrated at sufficient levels to be a significant health hazard. Steps of the invention include: (a) in... | 08/18/1992 |
| 5139543 | Method for filtering benz-a-anthracene from a gas stream The present invention relates to a method of filtering, at the end user's home, business or the like, a gas stream in which benz-a-anthracene has been concentrated at sufficient levels to be a significant health hazard. Steps of the invention include: (a)... | 08/18/1992 |
| 5110328 | Solvent adsorber and solvent recovery system A solvent adsorber includes a plural number of adsorbent material units of molded honeycomb structure with sheet heaters interposed between the respective units. The sheet heaters generate heat upon current supply to heat up the adsorbent material. As a r... | 05/05/1992 |
| 5104425 | Gas separation by adsorbent membranes Composite semipermeable membranes comprising porous adsorptive material supported by a porous substrate are disclosed for use in a process for the separation of multicomponent gas mixtures. In the process, one or more primary components adsorb within the ... | 04/14/1992 |
| 5102643 | Composition of synthetic porous crystalline material, its synthesis This invention relates to a new synthetic composition of ultra-large pore crystalline material, a method for its preparation and use thereof as sorbent and in catalytic conversion of organic compounds. The new crystalline material exhibits unusually large... | 04/07/1992 |
| 5082475 | Waste air purification process A novel waste air purification process based on a buffer unit/biofilter system and equipment for carrying out this process are described.... | 01/21/1992 |
| 5039651 | Chemically activated shaped carbon, process for producing same and use thereof A chemically activated shaped carbon suitable for adsorbing and desorbing hydrophobic organic compounds and having the specific properties in bulk density, pore volume, bulk density x pore volume, surface area, bulk density x surface area, mean pore size ... | 08/13/1991 |
| 5012037 | Integrated thermal swing-pressure swing adsorption process for hydrogen and hydrocarbon recovery Processes are disclosed for the separation of light hydrocarbons from a feedstream containing hydrogen, light hydrocarbons and heavy hydrocarbons. The processes employ thermal swing adsorption zone to adsorb heavy hydrocarbons and a pressure swing adsorpt... | 04/30/1991 |
