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        <title>Free Patents Online: Liquid purification or separation</title>
        <link>http://www.freepatentsonline.com./rssfeed/rsspat210.xml</link>
        <description>USPTO Class 210 Liquid purification or separation</description>
        <language>en-us</language>
        <lastBuildDate>Tue, 29 Dec 2009 08:00:00 EST</lastBuildDate>
        <item>
            <title><![CDATA[Ultraviolet ray sterilization device]]></title>
            <link>http://www.freepatentsonline.com./7638778.html</link>
            <description><![CDATA[A sterilization device includes a shell, an ultraviolet ray lamp tube fixed with a lamp support on an upper end of the shell, an inner quartz tube around the lamp tube, an outer quartz tube around the inner quartz tube, a stainless steel tube around the outer quartz tube, an inner passage between the inner and the outer quartz tubes, an outer passage between the outer quartz tube and the stainless steel tube, and a guiding member on the lower end of the shell; the guiding member has guiding holes to guide water along a spiral path, and a water inlet on a lower portion thereof, which communicates with the guiding holes; a covering member is threadedly engaged with an outer side of the lower end of the shell; the water inlet of the guiding member extends through the covering member; the covering member has a water outlet hole.]]></description>
            <pubDate>Tue, 29 Dec 2009 08:00:00 EST</pubDate>
        </item>
        <item>
            <title><![CDATA[Process and device for coupling hollow fibers to a microfluidic network]]></title>
            <link>http://www.freepatentsonline.com./7638098.html</link>
            <description><![CDATA[A microfluidic network having at least one channel which is open on the top side and in which one end of at least one hollow fiber is inserted and a process for making it. For this it is provided that the outside dimensions of the hollow fiber are matched to the inside dimensions of the channel, capillary channels being formed between the hollow fiber and the walls of the channel. The network is covered with a cover film or plate which closes the channel and preferably fixes the hollow fiber temporarily in the channel, and the capillary channels are filled with a fluidically sealing cement. In the area of the inserted end of the hollow fiber, a capillary stop structure is formed so that the cement as it is added it cannot seal the inserted open end of the hollow fiber.]]></description>
            <pubDate>Tue, 29 Dec 2009 08:00:00 EST</pubDate>
        </item>
        <item>
            <title><![CDATA[Cogeneration system for grease separation and power production]]></title>
            <link>http://www.freepatentsonline.com./7638068.html</link>
            <description><![CDATA[A cogeneration process and system which provides for the reclamation of a grease fuel from a concentrated grease trap pumping waste stream and the use of said grease fuel in a compression ignition reciprocating engine for the production of electric power. The concentrated grease trap pumpings are heated and mixed in the first stage of the process to ensure all grease is liquefied. This warm mixed stream is then separated by centrifuge into a heavy stream consisting of water and sediments and an oil-rich stream consisting of oil, grease/water emulsion and residual water. This oil-rich mixture is heated sufficiently to evaporate the residual water as well as the water of emulsion yielding a water free grease fuel suitable for use in the compression ignition engine. Heat energy for grease liquefaction and emulsion breaking is supplied by an engine jacket water cooling circuit and an exhaust heat recovery, respectively.]]></description>
            <pubDate>Tue, 29 Dec 2009 08:00:00 EST</pubDate>
        </item>
        <item>
            <title><![CDATA[Food processing effluent refurbishing system and method]]></title>
            <link>http://www.freepatentsonline.com./7638067.html</link>
            <description><![CDATA[A food processing effluent refurbishing system of the present invention refurbishes effluent water in a first and a second food processing loop. The system includes first and second circulation systems, first and second balance tanks, and a side stream. The first circulation system circulates water through the first food processing loop. The first balance tank connected to the first circulation system refurbishes effluent water circulating through the first food processing loop. The second circulation system circulates water through the second food processing loop. The second balance tank connected to the second circulation system refurbishes effluent water circulating through the second food processing loop. The side stream connects the first and second circulation systems.]]></description>
            <pubDate>Tue, 29 Dec 2009 08:00:00 EST</pubDate>
        </item>
        <item>
            <title><![CDATA[Flow control structure and related media filtration system]]></title>
            <link>http://www.freepatentsonline.com./7638066.html</link>
            <description><![CDATA[A stormwater filtration system includes a stormwater containment structure including a bottom surface, an inlet that receives stormwater and an outlet through which filtered stormwater exits the stormwater containment structure. A flow structure is at the bottom surface. The flow structure includes a conveyance conduit running along the bottom surface of the stormwater containment structure and in fluid communication with the outlet of the stormwater containment structure. The conveyance conduit includes a port extending through a sidewall of the conveyance conduit. A saddle includes an upper component and a lower component connected to the upper component such that the upper and lower components straddle the conveyance conduit at the port. The upper component includes an opening in communication with the port and the lower component supports the conveyance conduit above the bottom surface.]]></description>
            <pubDate>Tue, 29 Dec 2009 08:00:00 EST</pubDate>
        </item>
        <item>
            <title><![CDATA[Stormwater treatment apparatus and method]]></title>
            <link>http://www.freepatentsonline.com./7638065.html</link>
            <description><![CDATA[A liquid purification and separation apparatus for separation of pollutants in stormwater runoff is disclosed. This apparatus utilizes gravitational separation and tortuosity, resulting from a plurality of baffles both perpendicular to and oblique to the primary water flow direction, to trap substances less-dense and more-dense than water. The apparatus features improved resistance to pollutant remobilization through treatment of water volume rather than flow rates, using vertically stacked water columns of varying depths to settle small particles. An overflow structure diverts excessive liquid without interfering with purification and separation, and can be placed integrally within or external to the apparatus receptacle.]]></description>
            <pubDate>Tue, 29 Dec 2009 08:00:00 EST</pubDate>
        </item>
        <item>
            <title><![CDATA[Method and system for disinfecting irrigation water in agricultural irrigation systems]]></title>
            <link>http://www.freepatentsonline.com./7638064.html</link>
            <description><![CDATA[A method for disinfecting agricultural irrigation water system-wide comprises (a) continuously feeding chlorine to the irrigation system and (b) monitoring an outer field point to determine whether at least a detectable level of residual chlorine is seen at that point, whereby chlorination disinfection system-wide is achieved. An enhanced irrigation system which is adapted for disinfecting agricultural irrigation water system-wide includes (a) apparatus for continuously feeding chlorine to the irrigation system and (b) apparatus for monitoring residual chlorine at an outer field point (to determine whether at least a detectable level of residual chlorine is seen at that point) for the purpose of achieving chlorination disinfection system-wide.]]></description>
            <pubDate>Tue, 29 Dec 2009 08:00:00 EST</pubDate>
        </item>
        <item>
            <title><![CDATA[Methods for replenishing a charge of oxidizing gas within an oxidation tank]]></title>
            <link>http://www.freepatentsonline.com./7638063.html</link>
            <description><![CDATA[Contaminants are removed from fluid in a system where the fluid is sprayed into an air head at the top of a tank through a diffuser and withdrawn through a pick-up tube. A solenoid valve operates to allow oxygen-containing gas from a compressed gas source to flow into the tank through a shuttle valve, which is opened by the gas pressure. Simultaneously, a drain valve connected to the shuttle valve opens a drain, venting water and air from the tank. The solenoid valve also operates to close the gas supply line and connect the shuttle valve through a vent to atmosphere. Pressure within the tank closes the shuttle valve, which in turn closes the drain valve and disconnects the shuttle valve from the tank. A one-way-flow valve prevents fluid or gas from flowing from the tank backwards through the shuttle valve to the solenoid valve and out the vent.]]></description>
            <pubDate>Tue, 29 Dec 2009 08:00:00 EST</pubDate>
        </item>
        <item>
            <title><![CDATA[Ultra compact cyclonic flotation system]]></title>
            <link>http://www.freepatentsonline.com./7638062.html</link>
            <description><![CDATA[A cyclonic flotation system may be used to separate oil, grease, solids and other suspended matter from produced water by a combination of flotation and centrifugation in a separator cyclone. The cyclonic flotation system has a higher capacity-to-footprint ratio compared to conventional apparatus resulting in reduced weight and cost. The system is motion independent and suitable for use on floating structures such as offshore platforms and vessels.]]></description>
            <pubDate>Tue, 29 Dec 2009 08:00:00 EST</pubDate>
        </item>
        <item>
            <title><![CDATA[Coolant fluid cleaning method, system, and apparatus]]></title>
            <link>http://www.freepatentsonline.com./7638061.html</link>
            <description><![CDATA[Coolant fluid cleaning method, system, and apparatus use a rotating magnet to remove particulate matter from a fluid used to cool or lubricate a machining or other operation. Such system includes a rotating magnet in fluid communication with apparatus circulating fluid past the rotating magnet. A scraper blade removes particulate matter which is picked up by the rotating magnet. The system or apparatus can include a dirty fluid reservoir, one or more conveyor which removes chips and particulate matter from the dirty fluid reservoir, and a clean fluid reservoir. The rotating magnet collects particulate matter in the dirty fluid reservoir and discharges the collected particulate matter to a discharge conveyance. When the rotating magnet is used in combination with a disc filter, the magnet relieves some cleaning load from the disc filter.]]></description>
            <pubDate>Tue, 29 Dec 2009 08:00:00 EST</pubDate>
        </item>
        <item>
            <title><![CDATA[Process for removing contaminants from silicone-based solvents]]></title>
            <link>http://www.freepatentsonline.com./7638060.html</link>
            <description><![CDATA[An adsorbent for removal of impurities from silicone based solvents is presented. The adsorbent is regenerable for repeated use in cleaning silicone based solvents.]]></description>
            <pubDate>Tue, 29 Dec 2009 08:00:00 EST</pubDate>
        </item>
        <item>
            <title><![CDATA[Method for stable oxygen isotope separation and its apparatus using membrane distillation]]></title>
            <link>http://www.freepatentsonline.com./7638059.html</link>
            <description><![CDATA[The present invention relates to an oxygen isotope separation system and a method therefor. More specifically, the invention relates to a newly invented pressure-driven AGMD (Air Gap Membrane Distillation) system applied to a multi-stage membrane distillation cells which can produce an oxygen isotope effectively and economically, and a method therefor. The invention provides an oxygen isotope separation system including a number of Air Gap Membrane Distillation (AGMD) permeation cells connected in series to separate a feed into a product and a tail, wherein each of the AGMD cell is connected at a tail outlet with a reflux pump and at a product outlet, whereby the product from (i−1)th cell and the tail from (i+1)th cell are pumped as the feed into ith cell.]]></description>
            <pubDate>Tue, 29 Dec 2009 08:00:00 EST</pubDate>
        </item>
        <item>
            <title><![CDATA[Fluid storage and purification method and system]]></title>
            <link>http://www.freepatentsonline.com./7638058.html</link>
            <description><![CDATA[A method of storing and dispensing a fluid includes providing a vessel configured for selective dispensing of the fluid therefrom. The vessel contains an ionic liquid therein. The fluid is contacted with the ionic liquid for take-up of the fluid by the ionic liquid. There is substantially no chemical change in the ionic liquid and the fluid. The fluid is released from the ionic liquid and dispensed from the vessel.]]></description>
            <pubDate>Tue, 29 Dec 2009 08:00:00 EST</pubDate>
        </item>
        <item>
            <title><![CDATA[Method of treating water using petroleum coke]]></title>
            <link>http://www.freepatentsonline.com./7638057.html</link>
            <description><![CDATA[A process for treating water containing dissolved organics, for example, oil sands process-affected water, using petroleum coke is provided, comprising: removing petroleum coke from a coking operation; forming a petroleum coke/water slurry by adding the water to be treated to the petroleum coke; and mixing the slurry for a sufficient time in a carbon adsorption reactor to allow the petroleum coke to adsorb a substantial portion of the dissolved organics from the water.]]></description>
            <pubDate>Tue, 29 Dec 2009 08:00:00 EST</pubDate>
        </item>
        <item>
            <title><![CDATA[Treatment of sewage sludge]]></title>
            <link>http://www.freepatentsonline.com./7638056.html</link>
            <description><![CDATA[The present invention provides a method of reducing the pathogen content of sewage sludge comprising (a) adding to the sludge an effective amount of a phosphorous-containing compound and (b) keeping the phosphorous-containing compound in contact with the sludge for a sufficient time to reduce the amount of pathogens present in the sludge by an amount equivalent to a logarithmic reduction of 2 or more.]]></description>
            <pubDate>Tue, 29 Dec 2009 08:00:00 EST</pubDate>
        </item>
        <item>
            <title><![CDATA[Sludge quality]]></title>
            <link>http://www.freepatentsonline.com./7638055.html</link>
            <description><![CDATA[The invention provides the use of an effective amount of a non-oxidizing water-soluble biocide in the improvement of sludge quality by reducing the sludge tendency towards bulking, wherein the biocide comprises an alkyl-substituted phosphonium compound, an alkyl-substituted phosphine, an alkyl-substituted phosphine condensate, or a polymeric quaternary ammonium compound.]]></description>
            <pubDate>Tue, 29 Dec 2009 08:00:00 EST</pubDate>
        </item>
        <item>
            <title><![CDATA[Periphyton filtration systems and associated methods]]></title>
            <link>http://www.freepatentsonline.com./7638054.html</link>
            <description><![CDATA[A floway system for a building roof includes a substrate for supporting a periphyton culture that removes nutrient pollution from surface water and isolates the building envelope from solar-induced heat. The substrate is seedable to form a floway. A basin is provided for holding water to be treated, and a pump for pumping water therefrom to the floway inlet. At the floway outlet is positioned an effluent-collection gutter, which channels effluent to a collection vessel. Algal biomass can be harvested. A flexible divider is positioned in the gutter along the long axis, a top edge of securable adjacent the floway outlet so that, during harvesting, algal biomass is scraped into a distal section of the gutter, and thence to a biomass collection basin. The harvester can include a scraper and mechanism for traveling down the floway. The harvester can also move between adjacent floways and to the building roof.]]></description>
            <pubDate>Tue, 29 Dec 2009 08:00:00 EST</pubDate>
        </item>
        <item>
            <title><![CDATA[Poly(meth)acrylate membranes for separation of hydrocarbon mixtures]]></title>
            <link>http://www.freepatentsonline.com./7638053.html</link>
            <description><![CDATA[The separation of hydrocarbon mixtures comprising a polymerizable vinyl containing polyester of the formula I:  
 
Each R and R 2  is independently a C 6 -C 20  aromatic residue or a C 1 -C 20  aliphatic residue. Each R 1  is independently hydrogen or C 1 -C 5  alkyl; “j” is an integer in the range of 1-1000. Z is a heteroatom or two hydrogen atoms. The invention is also directed to the method of preparing the separation membrane.]]></description>
            <pubDate>Tue, 29 Dec 2009 08:00:00 EST</pubDate>
        </item>
        <item>
            <title><![CDATA[Polysulfone-based hollow-fiber membrane with selective permeability]]></title>
            <link>http://www.freepatentsonline.com./7638052.html</link>
            <description><![CDATA[The present invention provides a polysulfone type hollow fiber membrane which is reliable in safety and stability of performance and is easily incorporated into a module, and thus can be suitably used in a highly water permeable blood purifier for use in a therapy of chronic renal failure.  The present invention relates to a polysulfone type selectively permeable hollow fiber membrane comprising a polysulfone type resin and a hydrophilic polymer as main components, and characterized in that
 (A) the content of the hydrophilic polymer in the uppermost layer of a surface of the polysulfone type hollow fiber membrane on the blood-contacting side is at least 1.1 times larger than the content of the hydrophilic polymer in the proximate layer of the surface on the blood-contacting side, and (B) the content of the hydrophilic polymer in the uppermost layer of the other surface of the polysulfone type hollow fiber membrane, i.e., the reverse side of the surface on the blood-contacting side, is at least 1.1 times larger than the content of the hydrophilic polymer in the uppermost layer of the surface on the blood-contacting side.]]></description>
            <pubDate>Tue, 29 Dec 2009 08:00:00 EST</pubDate>
        </item>
        <item>
            <title><![CDATA[Filter apparatus]]></title>
            <link>http://www.freepatentsonline.com./7638051.html</link>
            <description><![CDATA[A filter apparatus in a container containing non-clarified contaminated liquid, especially wastewater, for clarifying this liquid consists of several spaced filter elements arranged in a circle or a polygon on a rotatably supported hollow shaft. The filter elements are connected to the hollow shaft in order to remove clarified liquid as permeate through the hollow shaft out of the container via a stationary pipeline. The rotating hollow shaft separates the wastewater from the permeate via at least two sealing elements. A blocking medium is arranged between the sealing elements.]]></description>
            <pubDate>Tue, 29 Dec 2009 08:00:00 EST</pubDate>
        </item>
        <item>
            <title><![CDATA[Rotatable water treatment device]]></title>
            <link>http://www.freepatentsonline.com./7638050.html</link>
            <description><![CDATA[A rotatable water treatment device including a hollow shaft and multiple filtering units is provided. The hollow shaft has an axis hole, an external wall and a plurality of through holes defined through the external wall and communicating with the axis hole. The multiple filtering units watertightly mounted on the external wall of the hollow shaft, and each of the filtering units includes a center hole, two clipping nets, a supporting net and two filtering membranes. The supporting net is mounted between the clipping nets and two filtering membranes sandwiches the clipping nets such that the filtering membranes can be prevented from sinking into the meshes of the supporting net with the pump effect to accelerate the conducting of the water-filtering.]]></description>
            <pubDate>Tue, 29 Dec 2009 08:00:00 EST</pubDate>
        </item>
        <item>
            <title><![CDATA[Three-port high performance mini hollow fiber membrane contactor]]></title>
            <link>http://www.freepatentsonline.com./7638049.html</link>
            <description><![CDATA[The instant invention is a hollow fiber membrane contactor. The hollow fiber membrane contactor includes a cartridge, a shell, a first end cap, and a second end cap. The shell, which is adapted for enclosing the cartridge, has two ends and an opening. The cartridge further includes a perforated center tube, a hollow fiber fabric, a first tube sheet, a second tube sheet, and a plug. The perforated center tube has a first end and a second end, and the hollow fiber fabric surrounds the center tube. The hollow fiber fabric includes hollow fiber membranes, and each hollow fiber membrane has a lumen. A first tube sheet and a second tube sheet affixes said fabric to said center tube at each end of the center tube, and the plug is located at the first tube sheet. Hollow fiber lumens are open at the first tube sheet and hollow fiber lumens are closed at the second tube sheet. The first end cap and the first tube sheet define a first headspace therebetween. The first end cap has an opening therethrough, which is in communication with hollow fiber lumens via said first headspace. The second end cap has an opening, and it is in communication with the center tube.]]></description>
            <pubDate>Tue, 29 Dec 2009 08:00:00 EST</pubDate>
        </item>
        <item>
            <title><![CDATA[Membrane module for immersed operation]]></title>
            <link>http://www.freepatentsonline.com./7638048.html</link>
            <description><![CDATA[A membrane module for an immersed operation has a fiber bundle of hollow fiber membranes which are cast into a headpiece and in immersed operation are surrounded by a liquid to be filtered. The module has a permeate collection chamber connected to the headpiece with an outlet for permeate draining from the interior of the hollow fiber membranes, and a gas supply having a pipe guided by the headpiece. The pipe terminates in the interior of the fiber bundle and has a gas outlet for a gaseous medium, which after the transfer from the pipe to the liquid to be filtered rises as bubbles between the hollow fiber membranes. The fiber bundle is divided into sections and free spaces remain between the sections which extend from the pipe to the outer circumference of the headpiece and promote an inflow of the liquid into a foot area adjoining the headpiece.]]></description>
            <pubDate>Tue, 29 Dec 2009 08:00:00 EST</pubDate>
        </item>
        <item>
            <title><![CDATA[Water filter having zeolite layers and activated carbon layer]]></title>
            <link>http://www.freepatentsonline.com./7638047.html</link>
            <description><![CDATA[A water filter for filtering raw water into potable water having a series of media layers in the following order: 1) sand to gravel or coarse silica; 2) zeolite; 3) activated carbon; 4) a second layer of sand to gravel or coarse silica; and 5) a second layer of zeolite is disclosed. Optionally, the filter further has a ceramic media layer, which may have a reactive coating such as calcium hypochloride. Further options include ferruginous latertic clay spheres (FLCS) or iron oxide brick particles, at least one grid, which may be charged, and/or at least one sand arch. The media layers are contained within at least one vessel. A water filtration system and methods for filtering raw water into potable water are also disclosed.]]></description>
            <pubDate>Tue, 29 Dec 2009 08:00:00 EST</pubDate>
        </item>
        <item>
            <title><![CDATA[Cartridge filter for aircraft]]></title>
            <link>http://www.freepatentsonline.com./7638046.html</link>
            <description><![CDATA[The invention relates to a filter device comprising a hydraulic block ( 1 ) receiving a removable filter ( 2 ) that is screwed into a first internal thread ( 8 ) of the hydraulic block. The hydraulic block receives a retaining member ( 101 ) suitable for retaining the filter axially when the filter is screwed to the hydraulic block, the hydraulic block including a second internal thread ( 8 ) that is on the same axis as the first internal thread and that receives a fastener member ( 102 ) for fastening the retaining member to the hydraulic block, the fastener member being screwed into the second internal thread with toque that is sufficient to prevent the retaining member escaping in service.]]></description>
            <pubDate>Tue, 29 Dec 2009 08:00:00 EST</pubDate>
        </item>
        <item>
            <title><![CDATA[Pressure vessel and recyclable filter cartridge]]></title>
            <link>http://www.freepatentsonline.com./7638045.html</link>
            <description><![CDATA[A filter assembly is described that includes a substantially recyclable filter cartridge inside a pressure vessel. The invented filter cartridge comprises substantially non-pressure bearing walls, except for a pressure-bearing neck or cap with neck that is adapted to withstand high pressures preferably in the range of at least 200 psi, and more preferably at least 475 psi from the inside. The walls of the filter cartridge that are incapable of withstanding significant internal pressure are surrounded on the outside by a pressure vessel. The invented cartridge need not seal to the pressure vessel, because the cartridge neck protrudes outside of the pressure vessel to seal directly to a filter head. The cartridge preferably includes a quick-disassembly mechanism for allowing quick and non-destructive access to the internal components and media of the cartridge.]]></description>
            <pubDate>Tue, 29 Dec 2009 08:00:00 EST</pubDate>
        </item>
        <item>
            <title><![CDATA[Aquarium filter housing with rounded bottom]]></title>
            <link>http://www.freepatentsonline.com./7638044.html</link>
            <description><![CDATA[An aquarium filter having a filter housing with a rounded bottom. The filter housing including a housing input that directs water into an interior chamber such that the water sweeps across the rounded bottom to reduce or eliminate dead spots and reduce particulate settlement.]]></description>
            <pubDate>Tue, 29 Dec 2009 08:00:00 EST</pubDate>
        </item>
        <item>
            <title><![CDATA[Grit chamber for wastewater treatment plant, capable of preventing sedimentation of organic material]]></title>
            <link>http://www.freepatentsonline.com./7638043.html</link>
            <description><![CDATA[A grit chamber for a wastewater treatment plant. A vertical floodgate is installed on a partitioning wall and is driven in a vertical direction to be opened downwardly from a top toward a bottom. A floodgate driving motor is coupled to one end of the vertical floodgate to directly drive the vertical floodgate. An inflow amount measurement sensor functions to stepwisely measure a flow amount of wastewater which passes through a wastewater tank. A control section is connected to the floodgate driving motor and the inflow amount measurement sensor to control the floodgate driving motor in response to a measurement result of the inflow amount measurement sensor. A wastewater level is adjusted within a predetermined range through operation of the vertical floodgate to maintain a constant flow velocity of wastewater which passes through a sand sedimentation zone, thereby preventing organic material which is contained in the wastewater and is other than sand, from sedimenting.]]></description>
            <pubDate>Tue, 29 Dec 2009 08:00:00 EST</pubDate>
        </item>
        <item>
            <title><![CDATA[System for monitoring the performance of fluid treatment cartridges]]></title>
            <link>http://www.freepatentsonline.com./7638042.html</link>
            <description><![CDATA[A fluid treatment system is provided, the system including a fluid treatment cartridge for treating fluid passing therethrough. The cartridge has an inlet through which untreated fluid enters the cartridge and an outlet from which treated fluid exits the cartridge. The cartridge also has a radio frequency identification (RFID) tag for storing data. The fluid treatment system also includes a connection manifold configured to detachably support the fluid treatment cartridge. The connection manifold has an inlet flow path for directing untreated fluid to the inlet of the cartridge and an outlet flow path for directing treated fluid from the outlet of the cartridge, and a data sensor for reading data stored on the RFID tag. Data stored on the RFID tag can be read by the data sensor and evaluated. Use of the fluid treatment system can be deterred based upon the evaluated data.]]></description>
            <pubDate>Tue, 29 Dec 2009 08:00:00 EST</pubDate>
        </item>
        <item>
            <title><![CDATA[Metal organic framework���polymer mixed matrix membranes]]></title>
            <link>http://www.freepatentsonline.com./7637983.html</link>
            <description><![CDATA[Metal-organic framework (MOF)-polymer mixed matrix membranes (MOF-MMMs) have been prepared by dispersing high surface area MOFs (e.g. IRMOF-1) into a polymer matrix (e.g. Matrimid 5218). The MOFs allow the polymer to infiltrate the pores of the MOFs, which improves the interfacial and mechanical properties of the polymer and in turn affects permeability. Pure gas permeation tests show the incorporation of 20 wt-% of IRMOF-1 in Matrimid 5218 polyimide matrix results in 280% improvement in CO 2  permeability without a loss of CO 2 /CH 4  selectivity compared to those of the pure Matrimid 5218 membrane. This type of MOF-MMMs has significantly improved gas separation performance with dramatically high CO 2  permeability (&gt;35 barrer) and higher than 29 CO 2 /CH 4  selectivity at 50° C. under 100 psig pressure, which are attractive candidates for practical gas separation applications such as CO 2  removal from natural gas.]]></description>
            <pubDate>Tue, 29 Dec 2009 08:00:00 EST</pubDate>
        </item>
        <item>
            <title><![CDATA[Circular secondary clarifier for wastewater treatment and an improved solids-liquid separation process thereof]]></title>
            <link>http://www.freepatentsonline.com./7637379.html</link>
            <description><![CDATA[The improved circular secondary clarifier of the present invention requires less surface area and low HRT and provides efficient solids-liquid separation. The improved clarifier has better SS and BOD reduction and provides high under flow solids concentrations, as compared to conventional secondary clarifiers. The improved clarifier is even capable of treating wastewaters containing low MLSS concentration. One of the biggest advantages of improved clarifier is that it does not require a separate sump cum pump house as it removes the settled sludge using suction mechanism thereby reduces capital and recurring cost. Further, it provides natural flocculation, which is essential for agglomeration of solids and increases particle size referred to as ‘floc’ and eliminates provision for a separate flocculation facility thereby reduces capital and recurring costs.]]></description>
            <pubDate>Tue, 29 Dec 2009 08:00:00 EST</pubDate>
        </item>
        <item>
            <title><![CDATA[Dual particulate filter for dry cleaning equipment]]></title>
            <link>http://www.freepatentsonline.com./7637127.html</link>
            <description><![CDATA[A dual particulate filter assembly includes a filter frame and a first filter element and a second filter element mounted in the filter frame. The first filter element is configured to remove particulates from a first medium, and the second filter element is configured to remove particulates from a second medium different from the first medium.]]></description>
            <pubDate>Tue, 29 Dec 2009 08:00:00 EST</pubDate>
        </item>
        <item>
            <title><![CDATA[Pool vacuum]]></title>
            <link>http://www.freepatentsonline.com./7636975.html</link>
            <description><![CDATA[An improved pool vacuum includes a filter cone and poppet valve combination which enables quick drainage of water which has passed through and been cleaned by the cleaner's filter. A charging circuit is provided with isolation so that the pool vacuum can be used in an electrolytic environment without battery drainage. A combination charger and hang bracket enables the pool vacuum to be stored in a vertical position to both drain and charge simultaneously. An interstitial open exhaust gap between a rear body and nose-cone shaped front section provides a low pressure drop free exhaust area for an impeller. An optionally obstructed bottom gap portion helps to produce a net downward thrust to assist in using the vacuum in deep pools from a long pole structure.]]></description>
            <pubDate>Tue, 29 Dec 2009 08:00:00 EST</pubDate>
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