Class / Patent application number | Description | Number of patent applications / Date published |
210653000 | Utilizing specified membrane material | 48 |
20080210634 | Semi-permeable membrane for use in osmosis, and method and plant for providing elevated pressure by osmosis to create power - The present invention concerns a semi-permeable membrane for use in osmosis consisting of one thin layer of a non-porous material (the diffusion skin), and one or more layers of a porous material (the porous layer), where the porous layer has a structure where porosity φ, thickness of the porous layer (m), and tortuosity τ, are related to one another as given by the expression: | 09-04-2008 |
20090266764 | Agent and Process for Increasing Rejection of Nanofiltration Membrane or Reverse Osmosis Membrane, Nanofiltration Membrane or Reverse Osmosis Membrane, Process for Water Treatment and Apparatus for Water Treatment - An agent for increasing the rejection of a nanofiltration membrane or a reverse osmosis membrane which comprises a compound having a polyalkylene glycol chain having a weight-average molecular weight of 2,000 to 6,000; a process for increasing the rejection of a nanofiltration membrane or a reverse osmosis membrane which comprises bringing the nanofiltration membrane or the reverse osmosis membrane into contact with an aqueous solution of a compound having a polyalkylene glycol chain which is obtained by diluting the agent for increasing the rejection of a nanofiltration membrane or a reverse osmosis membrane described above with water; a nanofiltration membrane or a reverse osmosis membrane exhibiting a rejection increased in accordance with the process; and a process and an apparatus for water treatment using the nanofiltration membrane or the reverse osmosis membrane. The rejection and, in particular, the rejection to nonionic solutes, of a nanofiltration membrane or a reverse osmosis membrane can be increased while the flux is kept at a great value. | 10-29-2009 |
20100270239 | ZEOLITE MEMBRANE AND METHODS OF MAKING AND USING SAME FOR WATER DESALINATION - A novel zeolite membrane is manufactured using zeolite seeds that are deposited on a support material. The seeds are then further grown in a secondary growth step to form a membrane with inter-grown particles. The pore size of the zeolite membrane is in a range between 3 angstrom and 8 angstrom, which allows water to flow through the membrane at a relatively high flux rate while excluding dissolved ions. The novel zeolite membrane is surprisingly efficient for desalinating sea water using reverse osmosis. The zeolite membrane is capable of high rates of water flux rate and high percentage of ion rejection. | 10-28-2010 |
20110084026 | Biomimetic membranes, their production and uses thereof in water purification - The present invention discloses a water membrane comprising a lipid bilayer supported on a single side thereof on a water permeable dense support layer, this lipid bilayer being composed of one or more lipids and aquaporin proteins are embedded therein, further wherein the water permeable dense support layer is impermeable to the lipids and to the aquaporin proteins. Also are provided a method for the preparation of these membranes and uses thereof in water filtration applications. | 04-14-2011 |
20110290729 | PROCESS FOR THE PRODUCTION OF ULTRA PURE WATER USING A MEMBRANE - The invention is directed to a process for the production of ultra pure water, comprising feeding water containing ions and optionally other impurities to one side of a membrane based on hydroxy sodalite (H-SOD), and recovering ultra pure water from the other side of the membrane. | 12-01-2011 |
20120055879 | POROUS MEMBRANE AND METHOD OF MAKING THE SAME - A method of making a porous membrane is disclosed. One such method optionally includes: forming a plurality of pillars in an array form over a substrate; and forming a layer with a mixture of a porous material precursor and a surfactant over the substrate. The method optionally includes removing the pillars to leave cavities in the layer; filling the cavities in the layer with a cavity filler; and removing the surfactant from the layer. The porous membrane can be used as, for example, a sieve for separating molecules from a chemical reaction. | 03-08-2012 |
20120074065 | ZEOLITE MEMBRANE, SEPARATION MEMBRANE, AND COMPONENT SEPARATION METHOD - A zeolite membrane excellent in separation performance and having an acid resistance, and a separation membrane employing the zeolite membrane are provided. | 03-29-2012 |
20120132591 | METHOD FOR DESALINATING WATER USING ZEOLITE MEMBRANE - A novel zeolite membrane is manufactured using zeolite seeds that are deposited on a support material. The seeds are then further grown in a secondary growth step to form a membrane with inter-grown particles. The pore size of the zeolite membrane is in a range between 3 angstrom and 8 angstrom, which allows water to flow through the membrane at a relatively high flux rate while excluding dissolved ions. The novel zeolite membrane is surprisingly efficient for desalinating sea water using reverse osmosis. The zeolite membrane is capable of high rates of water flux rate and high percentage of ion rejection. | 05-31-2012 |
20130015136 | SYSTEM AND METHOD FOR WATER PURIFICATION AND DESALINATION - A water treatment device includes an inner canister or cylinder that includes a seal and a filter assembly attached on one end. The water treatment device also includes an outer canister which is filled with unpurified water. The inner canister or cylinder is pressed into the outer canister to produce pressure on unpurified water that forces the unpurified water through the filter assembly. The inner canister or cylinder can be opened to reveal drinkable, or substantially purified water. | 01-17-2013 |
20160059189 | ION REMOVAL FROM WATER BY ULTRA-THIN GRAPHENE-BASED MEMBRANES - A graphene-based membrane, along with its methods of formation and use, is provided. The graphene membrane includes at least two graphene-oxide layers. Each graphene-oxide layer has a plurality of graphene-oxide flakes, with each graphene-oxide flake having a planar graphene structure with oxygen moieties extending therefrom. The graphene-based membrane can have a thickness of about 2 nm to about 20 nm. Such a graphene-based membrane can be utilized to remove ions from water. | 03-03-2016 |
20160250601 | SUPER-SURFACE SELECTIVE NANOMEMBRANES PROVIDING SIMULTANEOUS HIGH PERMEATION FLUX AND HIGH SELECTIVITY | 09-01-2016 |
210654000 | Synthetic resin | 35 |
20080223785 | Ionic Polymer Membranes - Compositions and processes are disclosed for economical separation of fluid mixtures. Broadly, the present invention discloses ionic polymer compositions that are useful for perm-selective membrane separations. More particularly, ionic polymers of the invention comprise a plurality of repeating structural units having as a constituent part thereof organic ionic moieties consisting of nitrogen containing anions and/or cations. In the form of non-porous membranes, ionic polymers of the invention facilitate recovery of purified organic and inorganic products from fluid mixtures by means of perm-selective membrane separations. The present invention also provides methods for forming the ionic polymers, for example by treating selected nitrogen-containing organic polymers with acids, or treating a polymeric material comprising a plurality of carboxylate groups with an amine. Ionic polymer compositions of the invention are particularly useful for simultaneous recovery of a permeate product of an increased concentration, and a desired non-permeate stream, from a fluid mixture containing at least two compounds of different boiling point temperatures. | 09-18-2008 |
20080290034 | Bridged macrocyclic module compositions - This invention is related to the fields of organic chemistry and nanotechnology. In particular, it relates to materials and methods for the preparation of organic synthons and bridged macrocyclic module compounds. The bridged macrocyclic module compounds may be used to prepare macrocyclic compositions such as nanofilms, which may be useful for filtration. | 11-27-2008 |
20080308497 | Filter Element - A radial flow filter element ( | 12-18-2008 |
20090114596 | NANOFILM AND MEMBRANE COMPOSITIONS - Nanofilms useful for filtration are prepared from oriented amphiphilic molecules and oriented macrocyclic modules. The amphiphilic species may be oriented on an interface or surface. The nanofilm may be prepared by depositing or attaching an oriented layer to a substrate. A nanofilm may also be prepared by coupling the oriented macrocyclic modules to provide a membrane. | 05-07-2009 |
20090283476 | Transparent and flame retardant polysulfone compositions - A polysulfone having a first polyphenylene sulfone unit (i.e. PPSU unit) based on one biphenol group and one diphenyl sulfone group and a second sulfone unit (i.e. PSU-AF unit) based on one hexafluorobisphenol A group and one diphenylsulfone group. The polysulfone is transparent and has a total heat release and peak heat release of less than 65 kW·min/m | 11-19-2009 |
20090294361 | Permeate tube - A permeate tube for spiral wound membrane comprising at least one tubular unit, which unit has spaced along its length a plurality of permeate transfer means, and one or more external grooves forming flow channels connecting the permeate transfer means. The present invention relates further to a process for treating a material having a viscosity less than 50 cP by the use of a spiral wound membrane comprising a permeate tube having at least one tubular unit, which unit has spaced along its length a plurality of permeate transfer means, and one or more external grooves forming flow channels connecting the permeate transfer means, around the permeate tube are one or more permeate transfer leaves, one or more membrane leaves and one or more space leaves wound. The present invention relates also to a process of operating a spiral wound membrane. The present invention relates further to uses of the spiral wound membrane. | 12-03-2009 |
20100108607 | POLYSULFONE MEMBRANES METHODS AND APPARATUSES - The present invention relates to methods and apparatuses for water filtration comprising contacting a water stream with a membrane comprising a polysulfone having structural units of Formula I | 05-06-2010 |
20100133192 | Polymer Membranes Prepared from Aromatic Polyimide Membranes by Thermal Treating and UV Crosslinking - The present invention discloses a new type of high performance polymer membranes prepared from aromatic polyimide membranes by thermal treating and crosslinking and methods for making and using these membranes. The polymer membranes were prepared from aromatic polyimide membranes by thermal treating under inert atmosphere followed by crosslinking preferably by using a UV radiation source. The aromatic polyimide membranes were made from aromatic polyimide polymers comprising both pendent hydroxy functional groups ortho to the heterocyclic imide nitrogen and cross-linkable functional groups in the polymer backbone. The membranes showed significantly improved selectivity and permeability for gas separations compared to the aromatic polyimide membranes without any treatment. The membranes can be fabricated into any convenient geometry and are not only suitable for a variety of liquid, gas, and vapor separations, but also can be used for other applications such as for catalysis and fuel cell applications. | 06-03-2010 |
20100206811 | POLYMERIC MEMBRANES INCORPORATING NANOTUBES - The present invention relates to semipermeable membranes with nanotubes dispersed therein, and the methods of preparing the same. | 08-19-2010 |
20100294719 | PROCESS FOR TREATMENT OF PRODUCED WATER - A process for treating produced water in heavy oil production comprises, providing an oil/water mixture gathered from an oil/water collection well, whereby oil from said oil/water mixture is separated to provide an oil product and a produced water product containing oil, dissolved gases and dissolved solutes. Said produced water product is then deoiled, and the deoiled water subsequently passes though a membrane system, resulting in permeate water and reject. The resulting permeate water is sent on to a boiler system for production of steam, and the reject is introduced into an evaporator to result in distillate water and blow down. Thereafter, the blow down may be charged into zero liquid discharge treatment; and the distillate water added to the membrane permeate. | 11-25-2010 |
20110036775 | SEA WATER REVERSE OSMOSIS SYSTEM TO REDUCE CONCENTRATE VOLUME PRIOR TO DISPOSAL - The present invention includes systems and methods for treatment of seawater RO system for recovering most of the water (i.e., 85-90%) from the concentrate of a brackish groundwater reverse osmosis treatment system that may use, e.g., a batch method. With proper pH control and antiscalant dosage, the batch-treatment SWRO system of the present invention can be used to recovery water from silica-saturated RO concentrate without fouling the membranes. Silica concentrations of over 1000 mg/L are attainable with relatively minimal pre-treatment of the silica-saturated feed solution. | 02-17-2011 |
20110049055 | REVERSE OSMOSIS COMPOSITE MEMBRANES FOR BORON REMOVAL - Improved methods for reducing boron concentration in seawater or brackish water, while simultaneously maintaining or improving the salt rejection of membrane and flow performance of polyamide reverse osmosis (RO) membranes include contacting the water with a composite membrane comprising moieties derived from an aromatic sulfonyl halide, a heteroaromatic sulfonyl halide, a sulfinyl halide; a sulfenyl halide; a sulfuryl halide; a phosphoryl halide; a phosphonyl halide; a phosphinyl halide; a thiophosphoryl halide; a thiophosphonyl halide, an isocyanate, a urea, a cyanate, an aromatic carbonyl halide, an epoxide or a mixture thereof. | 03-03-2011 |
20110290730 | Asymmetric Nanotube Containing Membranes - This invention relates to heterogenous pore polymer nanotube membranes useful in filtration, such as reverse osmosis desalination, nanofiltration, ultrafiltration and gas separation. | 12-01-2011 |
20120012527 | COMPOSITE MEMBRANE WITH MULTI-LAYERED ACTIVE LAYER - A polymeric membrane includes an active layer on a support. The active layer includes at least two chemically distinct crosslinked, polyamide films, and the films are crosslinked with each other at an interface. | 01-19-2012 |
20120080380 | THIN FILM COMPOSITE MEMBRANES INCORPORATING CARBON NANOTUBES - Processes for manufacturing a thin film composite membrane comprising multi-walled carbon nanotubes include contacting under interfacial polymerization conditions an organic solution comprising a polyacid halide with an aqueous solution comprising a polyamine to form a thin film composite membrane on a surface of a porous base membrane; at least one of the organic solution and the aqueous solution further including multi-walled carbon nanotubes having an outside diameter of less than about 30 nm. | 04-05-2012 |
20120080381 | THIN FILM COMPOSITE MEMBRANES INCORPORATING CARBON NANOTUBES - Processes for manufacturing a thin film composite membrane comprising multi-walled carbon nanotubes include contacting under interfacial polymerization conditions an organic solution comprising a polyacid halide and carbon nanotubes with an aqueous solution comprising a polyamine to form a thin film composite membrane on a surface of a porous base membrane, wherein the organic solution additionally comprises a saturated cyclic C | 04-05-2012 |
20120097612 | ORGANIC FLUID PERMEATION THROUGH FLUOROPOLYMER MEMBRANES - Separation of the components of liquid mixtures is achieved by contacting a liquid mixture with a nonporous membrane having a fluoropolymer selectively permeable layer and imposing a pressure gradient across the membrane from feed side to permeate side. Unusually high transmembrane flux is obtained when the membrane is subjected to one or more process conditions prior to separation. These include (a) leaving some residual amount of membrane casting solvent in the membrane, and (b) contacting the membrane with a component of the mixture to be separated for a duration effective to saturate the membrane with the component. | 04-26-2012 |
20120160771 | Separation Material - A separating material formed by a solid substrate having a substrate surface, primary or secondary amines coupled to the substrate surface, and a graft polymer formed on the substrate by covalently coupling the primary or secondary amines with a thermally labile radical initiator and subsequently contacting the substrate surface with a solution of one or more polymerizable monomers. Methods for the extracorporeal treatment of blood, blood plasma or blood serum employing the separating material, for affinity adsorption, ion-exchange adsorption, hydrophobic adsorption, or hydrophilic adsorption employing the separating material, and a separating column employing the separating material are also disclosed. | 06-28-2012 |
20120211424 | Novel Polymerizable Surfactant Platforms and Uses Thereof - The invention comprises a cross-linkable lyotropic (i.e., surfactant) liquid crystal (LLC) monomer platform that forms type I bicontinuous cubic (Q | 08-23-2012 |
20120234761 | Asymmetric Nanotube Containing Membranes - This invention relates to heterogenous pore polymer nanotube membranes useful in filtration, such as reverse osmosis desalination, nanofiltration, ultrafiltration and gas separation. | 09-20-2012 |
20120255909 | REVERSE OSMOSIS COMPOSITE MEMBRANES FOR BORON REMOVAL - Improved methods for reducing boron concentration in seawater or brackish water, while simultaneously maintaining or improving the salt rejection of membrane and flow performance of polyamide reverse osmosis (RO) membranes include contacting the water with a composite membrane comprising moieties derived from an aromatic sulfonyl halide, a heteroaromatic sulfonyl halide, a sulfinyl halide; a sulfenyl halide; a sulfuryl halide; a phosphoryl halide; a phosphonyl halide; a phosphinyl halide; a thiophosphoryl halide; a thiophosphonyl halide, an isocyanate, a urea, a cyanate, an aromatic carbonyl halide, an epoxide or a mixture thereof. | 10-11-2012 |
20120261344 | HYBRID NANOPARTICLE TFC MEMBRANES - Reverse osmosis membranes made by interfacial polymerization of a monomer in a nonpolar (e.g. organic) phase together with a monomer in a polar (e.g. aqueous) phase on a porous support membrane. Interfacial polymerization process is disclosed for preparing a highly permeable RO membrane, comprising: contacting on a porous support membrane, a) a first solution containing 1,3-diaminobenzene, and b) a second solution containing trimesoyl chloride, wherein at least one of solutions a) and b) contains nanoparticles when said solutions are first contacted, and recovering a highly permeable RO membrane. | 10-18-2012 |
20120273423 | COMPOSITE MEMBRANES COMPRISING A SULFONATED POLYARYLETHER AND THEIR USE IN FORWARD OSMOSIS PROCESSES - The present invention is directed to thin film composite membrane (TFC membrane) comprising a substrate layer (S) based on a sulfonated polymer, e.g. a sulfonated polyarylether, and a polyamide film layer (F) and further to a method for their preparation. Furthermore, the present invention is directed to osmosis processes, in particular to forward osmosis (FO) processes, using said membrane. | 11-01-2012 |
20130015137 | METHOD OF MAINTAINING WATER QUALITY IN A PROCESS STREAMAANM Urmenyi; Ana-MarianaAACI UtrechtAACO NLAAGP Urmenyi; Ana-Mariana Utrecht NLAANM Gupta; AmitAACI AuroraAAST ILAACO USAAGP Gupta; Amit Aurora IL USAANM Davies; Chris D.AACI FrodshamAACO GBAAGP Davies; Chris D. Frodsham GBAANM Simons; BertAACI AmstelveenAACO NLAAGP Simons; Bert Amstelveen NL - Disclosed and claimed is a method of removing contaminants from a process stream or stabilizing a system parameter in the process stream. The method includes providing a filtration system in communication with a controller, wherein the controller is operable to automatically initiate a flow from the process stream into the filtration system when the system parameter of the process stream is within above an upper threshold value and/or below a lower threshold value; and activating the filtration system, wherein the flow comprises a flow rate through the filtration system and the controller is operable to adjust the flow rate. | 01-17-2013 |
20130020262 | HIGH-DENSITY POLYDICYCLOPENTADIENE - The invention provides highly cross-linked polydicyclopentadiene matrices and methods for using such matrices to separate components having varying cross-sectional areas. | 01-24-2013 |
20130105395 | NANOSTRUCTURED MEMBRANES FOR ENGINEERED OSMOSIS APPLICATIONS | 05-02-2013 |
20130118983 | ASYMMETRIC MEMBRANES FOR USE IN NANOFILTRATION - Improved integrally skinned asymmetric membranes for organic solvent nanofiltration, and their methods of preparation and use are disclosed. Membranes are formed from polybenzimidazoles by phase inversion and are then crosslinked by addition of crosslinking agents. These stabilise the membranes and allow solvent nanofiltration to be maintained even in the solvents from which the membranes were formed by phase inversion, and in strongly acidic and strongly basic solvents. | 05-16-2013 |
20130341277 | Porous Film - A reverse osmosis (RO) membrane can include a porous substrate, a multilayer film arranged on the substrate, which includes a first layer including a polyelectrolyte and a second layer including a plurality of clay particles, where the first layer is arranged adjacent to the second layer. The multilayer film can be prepared by a spray-LbL process. The resulting RO membrane can provide high water permeability combined with high salt rejection. | 12-26-2013 |
20140054228 | Novel Flux Enhancing Agent for Improving Composite Polyamide Reverse Osmosis Membrane Performance - The present disclosure describes an additive that may be used in the manufacture of thin-film polyamide composite membranes. Thin-film polyamide composite membranes are used in filtration processes, such as reverse osmosis and nanofiltration. The additive may be an amino-siloxane compound. The amino-siloxane compound includes repeated groups of silicon bonded to oxygen with at least one amine functional group. Optionally, the amino-siloxane compound may also include a hydrophilic group. The additive reacts with an aqueous phase and an organic phase to form a thin polyamide film on a porous substrate. | 02-27-2014 |
20140284276 | Sea Water Reverse Osmosis System to Reduce Concentrate Volume Prior to Disposal - The present invention includes systems and methods for treatment of seawater RO system for recovering most of the water (i.e., 85-90%) from the concentrate of a brackish groundwater reverse osmosis treatment system that may use, e.g., a batch method. With proper pH control and antiscalant dosage, the batch-treatment SWRO system of the present invention can be used to recovery water from silica-saturated RO concentrate without fouling the membranes. Silica concentrations of over 1,000 mg/L are attainable with relatively minimal pre-treatment of the silica-saturated feed solution. | 09-25-2014 |
20150060364 | Thin Film Composite Membrane Structures - Provided are thin film composite membrane structures comprising: a selective membrane layer for ion rejection attached to a support layer, the support layer comprising a multi-zone microfiltration membrane comprising: a porous support material; and at least two microfiltration zones, where a first zone comprises a first membrane and a second zone that is attached to the first zone and that coats at least a portion of the porous support material. Thin film composite membrane structures may be provided in reverse osmosis systems or nanofiltration systems. Also, thin film composite membrane structures may be provided in direct osmotic concentration systems, forward osmosis systems, or pressure retarded osmosis systems. | 03-05-2015 |
20160001236 | Universal Scalable and Cost-Effective Surface Modifications - Disclosed are fouling resistant filtration membranes comprising a polymeric thin-film membrane comprising a surface. Also disclosed are methods of modifying thin-film filtration membranes, thereby improving, for example, the anti-fouling properties of the membranes. Also disclosed are methods of purifying water using the disclosed membranes. 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. | 01-07-2016 |
20160001237 | ASYMMETRICALLY POROUS MEMBRANES MADE OF CROSS-LINKED THERMOPLASTIC SILICONE ELASTOMER - The invention relates to a covalently cross-linked, asymmetrically porous membranes (M) made of thermoplastic silicone elastomers; a method for producing the covalently cross-linked, asymmetrically porous membranes (M), in which, in a first step, a solution of a silicone composition SZ, which contains thermoplastic silicone elastomer S1 with alkenyl groups and contains cross-linker V, and a solvent L is produced, in a second step, the solution is brought into a mold, in a third step, the solution brought into a mold is brought into contact with a precipitation medium F, wherein a covalently non-cross-linked membrane is formed. In a fourth step, the solvent L and the precipitation medium F are removed from the non-cross-linked membrane and, in a fifth step, the membrane is subjected to a cross-linking, wherein the covalently cross-linked membrane M is formed; the membranes (M) produced according to the method; and to the use of the membranes (M) for the separation of material mixtures or for coating. | 01-07-2016 |
20160023168 | COMPLEX NANOFILTRATION MEMBRANE AND THE PREPARATION THEREOF - A complex nanofiltration membrane comprising a substrate and a separating layer, wherein the separating layer is an oxidant-treated, crosslinked network structure formed from a hydroxyl-containing polymer, a thiol-containing silane coupling agent and a crosslinking agent, is disclosed. Also disclosed are a process for preparing the complex nanofiltration membrane and use of the complex nanofiltration membrane in water treatment. | 01-28-2016 |
20160030897 | HYBRID NANOPARTICLE TFC MEMBRANES - Reverse osmosis membranes made by interfacial polymerization of a monomer in a nonpolar (e.g. organic) phase together with a monomer in a polar (e.g. aqueous) phase on a porous support membrane. Interfacial polymerization process is disclosed for preparing a highly permeable RO membrane, comprising: contacting on a porous support membrane, a) a first solution containing 1,3-diaminobenzene, and b) a second solution containing trimesoyl chloride, wherein at least one of solutions a) and b) contains nanoparticles when said solutions are first contacted, and recovering a highly permeable RO membrane. | 02-04-2016 |
210655000 | Cellulosic | 2 |
20100018926 | Mixed Matrix Membranes Containing Ion-Exchanged Molecular Sieves - The present invention discloses mixed matrix membranes (MMMs) comprising ion-exchanged molecular sieves such as UZM-5 zeolite ion-exchanged with Li | 01-28-2010 |
20130140236 | HOLLOW FIBER TYPE REVERSE OSMOSIS MEMBRANE AND METHOD FOR MANUFACTURING THE SAME - A hollow fiber type reverse osmosis membrane including cellulose acetate, characterized in that the filtration rate and the salt rejection rate when an aqueous solution having sodium chloride concentration of 1,500 mg/L is filtered from outer side to inner side of the hollow fiber type reverse osmosis membrane at 25° C. and 1.5 MPa pressure are 180 to 350 L/m | 06-06-2013 |