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Organic

Subclass of:

210 - Liquid purification or separation

210348000 - FILTER

210500100 - Material

210500210 - Semipermeable membrane

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Class / Patent application numberDescriptionNumber of patent applications / Date published
210500280 Cyclic 32
210500370 Amine 24
210500420 Vinyl 5
20120097605POLYMER MEMBRANE FOR WATER TREATMENT - A polymer membrane for water treatment contained a chlorinated vinyl chloride resin with a chlorine content of 58 to 73.2%. According to the present invention, it is possible to provide polymer membranes for water treatment that, along with being able to achieve sufficient filtration capacity and water permeability, have extremely high strength.04-26-2012
20100084335Composite membrane for the separation of water and method for manufacturing same - A composite membrane is provided for the separation of water with at least one separation layer of cross-linked polyvinyl alcohol, with the separation layer being subjected in a separate process step to a post-crosslinking operation with an acid or an acid-releasing compound and at least one dialdehyde.04-08-2010
20120103895VINYLIDENE FLUORIDE RESIN POROUS MEMBRANE, MANUFACTURING METHOD THEREFOR, AND METHOD FOR MANUFACTURING FILTRATE WATER - A porous membrane of vinylidene fluoride resin, including a 10 μm-thick portion contiguous to one surface thereof which comprises network resin fibers having an average diameter of at most 100 nm and shows a porosity A1 of at least 60% as measured by a focused ion beam-scanning electron microscope, and showing a surface pore size of at most 0.3 μm on said one surface thereof. The porous membrane has a treated water side surface layer showing a small surface pore size suitable for water filtration treatment and formed of extremely thin network resin fibers giving an extremely high porosity, thus showing an excellent minute particle-blocking performance and also extremely good anti-soiling resistance and regeneratability. The porous membrane is produced by a process including: melt-extrusion of a composition obtained by adding to vinylidene fluoride resin of a large molecular weight a relatively large amount of a polyester plasticizer which is mutually soluble with the resin and provides the resultant mixture with a crystallization temperature that is substantially identical to that of the vinylidene fluoride resin alone to form film, followed by cooling from one side of the film to solidify the film, extracting the plasticizer and stretching the membrane after the extraction while partially wetting a surface portion thereof.05-03-2012
20100224555NANOCOMPOSITE MEMBRANES AND METHODS OF MAKING AND USING SAME - Disclosed are composite membranes for removing contaminants from water, the membranes comprising a water-permeable thin film polymerized on a porous support membrane and, optionally, a mixture, including a surface coating material having a different chemical composition than the thin film, coated on the thin film. In one aspect, one or more layers of the composite membranes further comprise nanoparticles. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present invention.09-09-2010
20120031834ION-EXCHANGE MEMBRANE AND METHOD FOR PRODUCING SAME - There is provided an ion-exchange membrane comprising an ion-exchange layer made of a cationic polymer and/or an anionic polymer and a supporting layer, wherein the ion-exchange layer is formed on the supporting layer by printing. Such an ion-exchange membrane exhibits excellent anti-organic fouling and low membrane resistance, thereby high efficient and long-time stable electrodialysis can be achieved. Formation of the ion-exchange layer as a charge-mosaic layer consisting of the cationic polymer domains and the anionic polymer domains provides a charge-mosaic membrane exhibiting excellent electrolyte permselectivity and mechanical strength.02-09-2012
210500350 Acrylate 4
20100206806HYDROPHILIC POROUS SUBSTRATES - Hydrophilic porous substrates, methods of making hydrophilic porous substrates from hydrophobic polymers are disclosed.08-19-2010
20110120941COMPOSITE MEMBRANES WITH PERFORMANCE ENHANCING LAYERS - A composite membrane includes a filtration membrane with a surface; and a layer on the surface of the filtration membrane. The layer includes a polymer including a poly(ethylene glycol) moiety cross-linked with an ammonium salt or a precursor of an ammonium salt05-26-2011
20110120940POLYMERIC FILMS MADE FROM POLYHEDRAL OLIGOMERIC SILSESQUIOXANE (POSS) AND A HYDROPHILIC COMONOMER - A composite membrane includes a filtration membrane and a layer on a surface of the filtration membrane. The layer includes a polymer including a polyhedral oligomeric silsesquioxane (POSS) derivative with a hydrophilic moiety attached to at least one vertex thereof. A method for making a composite membrane includes applying to a surface of a filtration membrane a photopolymerizable composition including a POSS compound, a hydrophilic comonomer, and a photoinitiator. The composition is cured to form a hydrophilic layer on the filtration membrane.05-26-2011
20130118975HYDROPHILIC POROUS SUBSTRATES - Hydrophilic porous substrates, methods of making hydrophilic porous substrates from hydrophobic polymers are disclosed.05-16-2013
210500360 Alkene other than vinyl 3
20110290717MEMBRANE POST TREATMENT - The invention relates to polymeric ultrafiltration or microfiltration membranes of, for instance, poly(ethylene chlorotrifluoroethylene) (HALAR®), PVDF or PP, incorporating PVME or vinyl methyl ether monomers. The PVME may be present as a coating on the membrane or dispersed throughout the membrane or both. The membranes are preferably hydrophilic with a highly asymmetric structure with a reduced pore size and/or absence of macrovoids as a result of the addition of PVME. The PVME maybe cross-linked. The invention also relates to methods of hydrophilising membranes and/or preparing hydrophilic membranes via thermal or diffusion induced phase separation processed.12-01-2011
20090134089Fish tank filter - A filter for use in filtering and treating contaminated water in an aquarium tank includes a filter bag for receiving a continuous supply of contaminated aquarium water pumped under a predetermined pressure into the interior of the bag. The wall of the bag is composed of a porous filter membrane formed of a laminate of a ePTFE membrane and polypropylene needlefelt material.05-28-2009
20080203012MEMBRANE, APPARATUS, AND ASSOCIATED METHOD - A membrane is provided that is formed from a composition. The composition comprises a polyarylene ether polymer or copolymer comprising a zwitterion; or comprises a polyarylene polymer or copolymer comprising a zwitterion.08-28-2008
210500410 Sulfone 2
20090242479AROMATIC HALOSULFONYL ISOCYANATE COMPOSITIONS - The present invention provides a polymer composition comprising structural units derived from an aromatic halosulfonyl isocyanate having structure I10-01-2009
20080197072Microfiltration Membrane With Improved Filtration Properties - Integrally asymmetric flat membrane for microfiltration comprising at least 40 wt. % of a hydrophobic first sulfone polymer and a hydrophilic second polymer with a pore size distribution over the membrane wall, having a separating layer in the wall's interior, and also having, in the direction from this separating layer, pore sizes increasing towards the surfaces, the second surface having pores with a mean diameter of at least 1 μm. The membrane comprises the hydrophilic second polymer in a concentration of 0.1-10 wt. %. The separating layer is located in an region facing the first surface, and the pore size passes through a maximum in the direction from the asymmetrical region towards the second surface.08-21-2008
210500400 Carbonate 1
20080251446"PRE-FILLED AND SEALED FILTER BAG" - A pre-filled and sealed filter bag, is provided including calcium carbonate material having fine pores and two sheets of filter paper having substantially similar geometrical shape and dimensions and defining an outer periphery. The calcium carbonate material is selected from coral sand, oysters shells and/or crab shells. A peripheral joint extends along the outer periphery of the sheets of filter paper and joins the sheets together substantially overlapping one another to define an inner chamber within the interior of the bag in which the calcium carbonate material is enclosed. Each of the two sheets of filter paper define within the peripheral joint an air and water permeable filter area of a minimum of 900 mm10-16-2008
Entries
DocumentTitleDate
20130075325Surface-Modified Fluoropolymer Membrane - A method for use in the manufacture of a filtration article includes providing a porous, fluoropolymer membrane, and applying a force to at least a portion of a first side surface of the membrane to modify the first side surface. The applied force may have a non-normal directional component relative to the first side surface. The surface modification may increase the density of the modified surface and/or reduce the porosity of the modified surface. Particle retention capabilities are thereby enhanced across the modified surface while maintaining permeability across the volume of the membrane.03-28-2013
20130062278METHOD OF PREPARING A WATER VAPOR TRANSFER MEMBRANE - A method of making a water vapor transport membrane is described. The method can include providing two sheets, each sheet comprising a support layer with an ionomer layer thereon; applying a solvent to at least one sheet; and contacting the ionomer layers of the two sheets to form a composite membrane comprising a composite ionomer layer between the two support layers. A composite membrane is also described.03-14-2013
20080290020METHOD FOR MAKING ORIENTED SINGLE-WALLED CARBON NANOTUBE/;POLYMER NANO-COMPOSITE MEMBRANES - Nano-composite membranes and methods for making them are described. The nano-composite membranes a made from a layer of oriented carbon nanotubes fixed in a polymeric matrix. Methods for efficient, facile, and inexpensive fabrication of the nano-composite membranes using a filtration method are also described. The carbon nanotubes may also be modified with chemical functional groups to promote their orientation in the carbon nanotube layer or to confer to them other properties.11-27-2008
20080290021Composite Membrane and Its Use in Separation Processes - The invention is directed to a composite ceramic/polymer membrane. The invention is further directed to the use of a composite membrane in pervaporation processes. According to the present invention there is provided a composite membrane comprising a support and a separation layer that comprises a rubbery polymer, wherein an intermediate layer is present between the separation layer and the support.11-27-2008
20110210063ATMOSPHERIC PRESSURE MICROWAVE PLASMA TREATED POROUS MEMBRANES - Versions of the invention include compositions and methods for making them that include a polymeric porous membrane with one or more atmospheric pressure microwave plasma modified surfaces. The modified porous membrane is stable, non-dewetting, and retains its mechanical strength.09-01-2011
20100213117MEMBRANE POST TREATMENT - The invention relates to polymeric ultrafiltration or microfiltration membranes of, for instance, Halar, PVDF or PP, incorporating PVME or vinyl methyl ether monomers. The PVME may be present as a coating on the membrane or dispersed throughout the membrane or both. The membranes are preferably hydrophilic with a highly asymmetric structure with a reduced pore size and/or absence of macrovoids as a result of the addition of PVME. The PVME maybe cross-linked. The invention also relates to methods of hydrophilising membranes and/or preparing hydrophilic membranes via thermal or diffusion induced phase separation processed.08-26-2010
20120267304Membrane, Method For Manufacturing The Same, And Composite Membrane Including The Same - Example embodiments relate to a membrane, a method of manufacturing the same, and a composite membrane including the same. The membrane may include a polyacrylonitrile-based copolymer that includes a hydrophobic side chain and/or a hydrophobic repeating unit. The membrane may include a skin layer and a porous layer. A thickness ratio of the skin layer relative to the porous layer may be about 0.01 or less. The skin layer may have a thickness of about 1 μm or less. The membrane may have a relatively high water flux. When using the membrane, a water treatment module having higher energy efficiency may be achieved.10-25-2012
20100320142ATMOSPHERIC PRESSURE MICROWAVE PLASMA TREATED POROUS MEMBRANES - Versions of the invention include compositions and methods for making them that include a polymeric porous membrane with one or more atmospheric pressure microwave plasma modified surfaces. The modified porous membrane is stable, non-dewetting, and retains its mechanical strength.12-23-2010
20110017662COMPOSITE SEPARATION MEMBRANE - In order to obtain a composite separation membrane which has excellent chemical resistance, separation performance and water permeability at the same time, the present invention provides a composite separation membrane comprising a separation function layer on a porous supporting membrane, characterized in that the separation function layer contains at least a polymer of a polyhedral silsesquioxane represented by the following general formula (a) and a hydrophilic monomer.01-27-2011
20110094960METHOD OF FORMING A REWETTABLE ASYMMETRIC MEMBRANE - The present disclosure provides rewettable asymmetric membranes and methods of forming rewettable asymmetric membranes. More specifically, methods are provided for forming rewettable asymmetric membranes having a copolymer and a polymerized material retained within the porous substrate.04-28-2011
20110005997HYBRID TFC RO MEMBRANES WITH NITROGEN ADDITIVES - RO membranes using chlorinated water as a feed stream maybe protected from damage by the chlorine with a protective layer including reactive nitrogen which forms chloromines on the surface of the membrane that reduce chlorine penetration. This protective layer also provides substantial anti-fouling capabilities, whether used with a chlorinated or unchlorinated feed stream because the chloramines are anti-bacterial. Although chlorine is lost in use, the anti-fouling layer or coating can be recharged with additional chlorine without damaging the discrimination layer. The anti-fouling layer or coating may be advantageously used with Thin film composite, TFC, membranes for use in forward and reverse osmosis may include nanoparticles, monohydrolyzed and/or di-hydrolyzed TMC, and/or alkaline earth alkaline metal complexes or other additives.01-13-2011
20110049044CRYSTALLINE POLYMER MICROPOROUS MEMBRANE, METHOD FOR PRODUCING THE SAME, AN DFILTER FOR FILTRATION - To provide a membrane capable of efficiently collecting fine particles for a long period of time, disclosed is a polytetrafluoroethylene microporous membrane wherein the mean pore size in the surface of the membrane is larger than the mean pore size in the back thereof and the mean pore size continuously changes from the surface toward the back.03-03-2011
20120248030Curable Compositions And Membranes - A curable composition comprising: (i) 2.5 to 50 wt % crosslinker comprising at least two acrylamide groups; (ii) 12 to 65 wt % curable ionic compound comprising an ethylenically unsaturated group and a cationic group; (iii) 15 to 70 wt % solvent; and (iv) 0 to 10 wt % of free radical initiator; and (v) 2 to 50 wt % of non-curable salt; wherein the composition has a pH of 1 to 12. The compositions are useful for preparing ion exchange membranes.10-04-2012
20120168370METHOD OF IMPROVING REJECTION OF PERMEABLE MEMBRANE AND PERMEABLE MEMBRANE - Provided is a method capable of effectively improving the rejection of a membrane without considerably lowering the permeation flux, even when the membrane has significantly degraded. The method of improving the rejection of a permeable membrane includes a step (amino treatment step) of passing an aqueous solution (amino treatment water) having a pH of 7 or less and containing an amino group-containing compound having a molecular weight of 1000 or less through the permeable membrane. After this amino treatment step, water having a higher pH than the amino treatment water is allowed to pass through the permeable membrane. Thus, by allowing the low-molecular-weight amino compound to pass through the membrane, a degraded portion of the membrane can be restored without considerably lowering the permeation flux of this permeable membrane, and the rejection can be effectively improved.07-05-2012
20100270234PLASTICIZATION RESISTANT MEMBRANES - This invention discloses a composition of, a method of making, and an application of high plasticization-resistant chemically cross-linked organic-inorganic hybrid membranes such as cross-linked cellulose acetate-cellulose triacetate-polyurethanepropylsilsesquioxane membranes. These cross-linked membranes with covalently interpolymer-chain-connected hybrid networks were prepared via a sol-gel condensation polymerization of cross-linkable organic polymer-organosilicon alkoxide precursor membrane materials. CO10-28-2010
20110120939CRYSTALLINE POLYMER MICROPOROUS MEMBRANE, METHOD FOR PRODUCING THE SAME, AND FILTRATION FILTER - A crystalline polymer microporous membrane containing a crystalline polymer microporous film containing a crystalline polymer, and having an asymmetric pore structure; a surfactant covering at least part of an exposed surface of the crystalline polymer microporous film; and a first crosslinking agent, wherein the surfactant is crosslinked with assistance of the first crosslinking agent.05-26-2011
20110017661CAUSTIC RESISTANT MEMBRANE - The invention relates to caustic resistant membranes formed by solvent casting a blend of one or more polyvinylidene fluoride polymers with one or more acrylic polymers.01-27-2011
20120325737POLYMER OR POLYMER COMPOSITE MEMBRANE HAVING THROUGH-THICKNESS MICROPORES, AND METHOD FOR PREPARING SAME - A polymer or polymer composite membrane having through-thickness micropores and a method of preparing the same are provided. More particularly, a polymer or polymer composite membrane having a pore structure such that micropores are aligned in a mesh structure in the thickness direction of the polymer or polymer composite membrane due to unidirectional freezing in the thickness direction of a solvent. The membrane has through-thickness micropores, and thus has improved permeability in the thickness direction and superior uniformity in size of the micropores and wall thickness between the micropores. For these reasons, the membrane can be used for a porous membrane substrate, microfiltration membrane, etc.12-27-2012
20080197070Composite Membranes and Membrane Systems and Methods For Production and Utilization Thereof - Thin film composite membranes on polyolefin structures may be prepared by interfacial polymerization on a polyolefin support. Polyolefin structures may have hollow and/or solid portions. The polyolefin structure may be hydrophilized prior to interfacial polymerization. The hydrophilized structure may also be treated with an aqueous monomer containing solution first, followed by the organic monomer containing solution. Alternatively, an organic monomer solution may be introduced first, followed by the aqueous monomer containing solution when treating a hydrophilized structure. The formed membrane may possess advantageous characteristics, including stability, hydrophilicity, predetermined pore sizes and/or solvent resistance.08-21-2008
20080197069Ceramic Filter Element for Water Purification - In a ceramic filter element 08-21-2008
20130199995POROUS POLYMER MEMBRANES, METHODS OF MAKING, AND METHODS OF USE - Embodiments of the present disclosure may relate to porous polymer membranes, structures including porous polymer membranes, devices including porous polymer membranes, methods of using porous polymer membranes, methods of making porous polymer membranes, and the like.08-08-2013

Patent applications in class Organic

Patent applications in all subclasses Organic