Cellulosic Patents (Class 210/500.29)
  • Patent number: 10376900
    Abstract: A filter that contains an adsorbent to remove the soluble portion of the contaminant, and then some form of electrostatic attraction additive. The electrostatic attraction additive would serve to pull the colloidal and particulate portion of the contaminant out of fluid, which could be held indefinitely, or be used to hold while the contaminant is allowed to solubilize and then be removed by the adsorbent. The electrostatic attraction additive could either be positively or negatively charged depending on the surface charge of the particulates that are in the fluid, and includes particles or fibers charged with charged polymers, zeolites, cation or anion exchange resin, powdered alumina, or nano-alumina.
    Type: Grant
    Filed: May 27, 2016
    Date of Patent: August 13, 2019
    Assignee: KX Technologies LLC
    Inventors: Andrew Lombardo, Rezan Kareem
  • Patent number: 10232321
    Abstract: A blood purification membrane capable of adsorbing creatinine which is a uremic toxin in the blood and purifying the blood, the blood purification membrane including fibers and particles adhered to the aforementioned fibers, wherein the aforementioned fibers are composed of a polymer insoluble in water, the aforementioned particles contain SiO2 and Al2O3, and pores capable of incorporating at least a portion of the aforementioned uremic toxin are provided in the aforementioned particles.
    Type: Grant
    Filed: August 25, 2014
    Date of Patent: March 19, 2019
    Assignee: NATIONAL INSTITUTE FOR MATERIALS SCIENCE
    Inventors: Mitsuhiro Ebara, Koki Namekawa, Takao Aoyagi
  • Patent number: 9945982
    Abstract: Fluorinated siloxane compositions, and methods of making and using the fluorinated siloxanes are disclosed. The polymers described herein may exhibit self-healing properties, a low dielectric constant, and a low refractive index. In some embodiments, a method of making a siloxane compound may involve contacting a silicon metal with a fluorinated compound to form a dichlorosilane compound, hydrolyzing the dichlorosilane compound to form a fluorinated tetrasiloxane compound, and contacting the fluorinated tetrasiloxane compound with a metal catalyst to form a fluorinated cyclic siloxane (D4) compound.
    Type: Grant
    Filed: November 8, 2013
    Date of Patent: April 17, 2018
    Assignee: Empire Technology Development LLC
    Inventors: Angele Sjong, Georgius Abidal Adam
  • Patent number: 9770692
    Abstract: Provided is a moisture permeable filter medium formed by laminating a hydrophobic layer having hydrophobicity and a hydrophilic layer having hydrophilicity together, in which one of the hydrophobic layer and the hydrophilic layer is composed of a PTFE porous film formed using PTFE, and the other of the hydrophobic layer and the hydrophilic layer is composed of an air permeable sheet to which air is permeable.
    Type: Grant
    Filed: November 26, 2014
    Date of Patent: September 26, 2017
    Assignee: NITTO DENKO CORPORATION
    Inventor: Shiho Uchiyama
  • Patent number: 9731251
    Abstract: Provided is a moisture permeable filter medium formed by laminating a hydrophobic layer having hydrophobicity and a hydrophilic layer having hydrophilicity together, in which one of the hydrophobic layer and the hydrophilic layer is composed of a PTFE porous film formed using PTFE, and the other of the hydrophobic layer and the hydrophilic layer is composed of an air permeable sheet to which air is permeable.
    Type: Grant
    Filed: November 26, 2014
    Date of Patent: August 15, 2017
    Assignee: NITTO DENKO CORPORATION
    Inventor: Shiho Uchiyama
  • Publication number: 20150141711
    Abstract: Membranes are provided for energy efficient purification of alcohol by pervaporation. Such membranes include a nanofibrous scaffold in combination with a barrier layer. The barrier layer includes a graphene oxide. The membranes may, in embodiments, also include a substrate.
    Type: Application
    Filed: November 19, 2013
    Publication date: May 21, 2015
    Inventors: Benjamin Chu, Benjamin S. Hsiao, Devinder Mahajan, Tsung-Ming Yeh
  • Publication number: 20150122735
    Abstract: The present invention relates to a material. In particular, it relates to a membrane for filtering water. More particularly, it relates to a membrane comprising carbon nanotubes and mixed cellulose ester porous membranes for water desalination and purification. Still more particular, the membrane comprising a fibrous substrate and carbon nanotubes formed on a fibrous substrate, wherein the surface of the carbon nanotubes is functionally modified. A microfluidic device comprising such a membrane and a method for filtering water are also disclosed.
    Type: Application
    Filed: May 20, 2013
    Publication date: May 7, 2015
    Inventors: Hui Ying Yang, Rohit Karnik
  • Patent number: 9010547
    Abstract: The present invention provides membranes having a coating layer comprising cellulose or cellulose derivative and a porous support comprising nanofibers prepared by a process of coating a solution comprising cellulose or a cellulose derivative dissolved in an ionic liquid on to a porous support layer. The present invention is useful for providing improved water flux and high rejection rates for oil/water emulsions. The present invention also provides fluid separation systems in UF, NF, RO and FO, incorporating membranes of the present invention.
    Type: Grant
    Filed: May 23, 2008
    Date of Patent: April 21, 2015
    Assignee: The Research Foundation of State University of New York
    Inventors: Benjamin Chu, Benjamin S. Hsiao, Hongyang Ma
  • Publication number: 20150068978
    Abstract: The disclosure is directed to an intermediate filtering membrane comprising: a filtering membrane having a charged or polar surface; and a transiently coupled charged compound, wherein the charged compound has an opposite charge to the membrane charge. Likewise, provided herein are methods and kits utilizing the intermediate membrane for various filtering membranes operations.
    Type: Application
    Filed: March 14, 2013
    Publication date: March 12, 2015
    Inventors: Gilad Lando, Dikla Zadaka-Amir, Andrew Norman Shipway, Steve Daren
  • Publication number: 20150068973
    Abstract: Method for preparing a membrane from fibril cellulose includes supplying fibril cellulose dispersion on a filter layer, draining liquid from a fibril cellulose dispersion by the effect of reduced pressure through the filter layer that is impermeable to fibrils of the fibril cellulose but permeable to the liquid to form a membrane sheet on the filter fabric, applying heat on the opposite side of the membrane sheet to the membrane sheet while continuing draining of the liquid through the filter layer by pressure difference over the filter layer, and removing the membrane sheet from the filter layer as a freestanding membrane.
    Type: Application
    Filed: May 14, 2013
    Publication date: March 12, 2015
    Inventors: Marko Bessonoff, Jouni Paltakari, Antti Laukkanen
  • Publication number: 20140319047
    Abstract: The disclosure provides a filtration material and a method for fabricating the same. The filtration material includes a supporting layer, and a composite layer, wherein the composite layer includes an ionic polymer and an interfacial polymer. Particularly, the ionic polymer and the interfacial polymer are intertwined with each other, resulting from ionic bonds formed between the ionic polymer and the interfacial polymer.
    Type: Application
    Filed: April 23, 2014
    Publication date: October 30, 2014
    Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE
    Inventors: Shu-Hui CHENG, Wei-Cheng TSAI, Shan-Shan LIN, Yu-Chuan HSU, Yin-Ju YANG
  • Patent number: 8833567
    Abstract: A coalescence media for separation of water-hydrocarbon emulsions comprises an emulsion-contacting sheet formed of: (a) at least one component of the group consisting of natural fibers, cellulose fibers, natural-based fibers, and cellulose-based fibers, at least one component of the group consisting of high-surface-area fibrillated fibers, surface-area-enhancing synthetic material, glass microfibers, and nanoceramic functionalized fibers; and (c) at least one component of the group consisting of a dry strength additive, and a wet strength additive, wherein the fibrous components of the media constitute at least about 70% of the media. In preferred embodiments, the coalescence media comprises kraft fibers, fibrillated lyocell fibers, glass microfibers or nanoceramic functionalized fibers, a wet strength additive, and a dry strength additive. Preferably, the coalescence media is formed as a single, self-supporting layer from a wet-laid process using a homogenously distributed, wet-laid furnish.
    Type: Grant
    Filed: January 15, 2009
    Date of Patent: September 16, 2014
    Assignee: Ahlstrom Corporation
    Inventors: Christine Stanfel, Frank Cousart
  • Patent number: 8784664
    Abstract: The present invention relates to a composite hollow fiber capillary membrane in particular for exploiting the value of dialysate and a method for the production thereof as well as its use in particular in haemo and peritoneal dialysis.
    Type: Grant
    Filed: December 30, 2008
    Date of Patent: July 22, 2014
    Assignee: Fresenius Medical Care Deutschland GmbH
    Inventors: Rainer Fislage, Igor Raiko
  • Patent number: 8753524
    Abstract: Systems and methods for treating a stream comprising a hydrocarbon liquid and an aqueous-based liquid are provided. The systems and methods may utilize a media composite comprising a mixture of a cellulose-based material and a polymer. In certain systems and methods, the media composite is capable of being backwashed. The stream comprising the hydrocarbon liquid and aqueous-based liquid may be separated by contacting the stream with the media composite. In certain system and methods, the stream comprising the hydrocarbon liquid and aqueous-based liquid may be coalesced by contacting the stream with the media composite.
    Type: Grant
    Filed: March 2, 2012
    Date of Patent: June 17, 2014
    Assignee: Siemens Energy, Inc.
    Inventors: Chad L. Felch, Matthew Patterson, Shane Wiercinski
  • Publication number: 20140151288
    Abstract: Technologies are generally described for composite membranes which may include a porous graphene layer in contact with a porous support substrate. In various examples, a surface of the porous support substrate may include at least one of: a thermo-formed polymer characterized by a glass transition temperature, a woven fibrous membrane, and/or a nonwoven fibrous membrane. Examples of the composite membranes permit the use of highly porous woven or nonwoven fibrous support membranes instead of intermediate porous membrane supports. In several examples, the composite membranes may include porous graphene layers directly laminated onto the fibrous membranes via the thermo-formed polymers. The described composite membranes may be useful for separations, for example, of gases, liquids and solutions.
    Type: Application
    Filed: November 30, 2012
    Publication date: June 5, 2014
    Applicant: Empire Technology Development LLC
    Inventors: Seth Adrian Miller, Gary L. Duerksen
  • Publication number: 20140138317
    Abstract: The present invention generally relates to gas separation membranes and, in particular, to high selectivity fluorinated ethylene-propylene polymer-comprising polymeric blend membranes for gas separations. The polymeric blend membrane comprises a fluorinated ethylene-propylene polymer and a second polymer different from the fluorinated ethylene-propylene polymer. The fluorinated ethylene-propylene polymers in the current invention are copolymers comprising 10 to 99 mol % 2,3,3,3-tetrafluoropropene-based structural units and 1 to 90 mol % vinylidene fluoride-based structural units. The second polymer different from the fluorinated ethylene-propylene polymer is selected from a low cost, easily processable glassy polymer.
    Type: Application
    Filed: November 16, 2012
    Publication date: May 22, 2014
    Applicant: UOP LLC
    Inventors: Chunqing Liu, Zara Osman, Changqing Lu, Andrew J. Poss, Rajiv R. Singh
  • Publication number: 20140083930
    Abstract: According to one embodiment, a desalination treatment membrane includes a desalting membrane and a base material which is disposed in close contact with the desalting membrane, wherein a solid salt is fixed to the base material by a graft-polymerization.
    Type: Application
    Filed: September 16, 2013
    Publication date: March 27, 2014
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Kenji SANO, Hideyuki Tsuji, Arisa Yamada, Akihiro Matsui, Yasunari Maekawa, Shin Hasegawa, Shinichi Sawada
  • Publication number: 20140069862
    Abstract: The present invention is directed to microfiltration and ultrafiltration membranes comprising a microporous material. The microporous material comprises: (a) a polyolefin matrix present in an amount of at least 2 percent by weight, (b) finely divided, particulate, substantially water-insoluble silica filler distributed throughout said matrix, said filler constituting from about 10 percent to about 90 percent by weight of said coated microporous material substrate, (c) at least 20 percent by volume of a network of interconnecting pores communicating throughout the coated microporous material, and (d) at least one coating composition applied to at least one surface of the membrane to adjust the surface energy of the membrane.
    Type: Application
    Filed: November 12, 2013
    Publication date: March 13, 2014
    Inventors: Qunhui Guo, Carol Knox, Shawn P. Duffy, Luciano M. Parrinello, Nicholas J. Parise, Brian K. Rearick
  • Publication number: 20140054227
    Abstract: The present invention provides a sugar-immobilized polymer substrate for removing a virus, the polymer substrate allowing efficient removal of a hepatitis virus or the like in a fluid, and a method for removing a virus. In particular, the present invention provides a sugar-immobilized polymer substrate for removing a hepatitis virus or the like, the polymer substrate allowing, in the case of an application to blood of a living body, reduction in the amount of blood taken out of the body, reduction in the removal amount of blood useful components, low invasiveness, and shortening of the operation cycle; and a method for removing a virus. A hollow fiber membrane according to the present invention can be used as a module having a function of effectively removing a virus and a function of not removing useful plasma components.
    Type: Application
    Filed: February 29, 2012
    Publication date: February 27, 2014
    Applicant: DIC CORPORATION
    Inventors: Naoto Sakurai, Naoya Ikushima, Tetsuro Suzuki
  • Patent number: 8651284
    Abstract: A hydrophilic semipermeable hollow-fiber membrane for blood treatment, with an integrally asymmetric structure based on a synthetic polymer. The hollow-fiber membrane possesses on its inner surface a separating layer and an adjoining open-pored supporting layer, and has an ultrafiltration rate in albumin solution of 5 to 25 ml/(h·m2·mmHg). The hollow-fiber membrane is free from pore-stabilizing additives and has a maximum sieving coefficient for albumin of 0.005 and a sieving coefficient for cytochrome c that satisfies the equation SCCC?5·10?5·UFRAlb3?0.004·UFRAlb2+1.081·UFRAlb?0.25.
    Type: Grant
    Filed: December 14, 2009
    Date of Patent: February 18, 2014
    Assignee: Membrana GmbH
    Inventors: Friedbert Wechs, Arne Gehlen, Bodo von Harten, Richard Kruger, Oliver Schuster
  • Publication number: 20140014568
    Abstract: Membranes are made from polymers and heat treated so that they have at least two zones with pores of different sizes. Pores with a smaller size have a lower molecular weight cut off than pores with a larger size. Zones with pores of different sizes may also be made by coating portions of membranes with polymer coatings. Membranes with pores of different sizes may be used in dialyzers for hemofiltration, hemodiafiltration, and other hemodialysis procedures. The membranes may also be used in other separation processes.
    Type: Application
    Filed: September 18, 2013
    Publication date: January 16, 2014
    Applicants: Baxter Healthcare S.A., Baxter International Inc.
    Inventor: Shmuel Sternberg
  • Patent number: 8623210
    Abstract: A pore diffusion type flat membrane separation apparatus X including a plurality of flat membranes 7 and a plurality of flat plate-like supports 1 arranged alternately with each other, each flat membrane 7 defining a plurality of pores and configured to separate a predetermined dispersed substance contained in a solution by a pore diffusion technique, each flat plate-like support 1 having a flow conduit 2 on one or both faces thereof. A ratio between a spatial volume of the flow conduit 2 and a membrane area of the flat membrane 7 is set from 0.04 to 0.4 cm. The flat plate-like support 1 includes, in at least two positions in a lateral face thereof water conduits 3 in communication with the flow conduit 2, so that flow directions of the solution in the flow conduits 2 of upper and lower flat plate-like supports 1 across the flat membrane 7 may be substantially same directions. The flat plate-like support 1 and the flat membrane 7 can be assembled with and disassembled from each other.
    Type: Grant
    Filed: March 2, 2007
    Date of Patent: January 7, 2014
    Inventors: Sei-ichi Manabe, Chieko Seki
  • Publication number: 20130334130
    Abstract: A conformal coating that resists fouling by waterborne contamination in aquatic environments, a method for fabricating the coating, and a filter having such a coating are disclosed. The coating comprises a hydrophilic polymer and a surfactant wherein the surfactant undergoes a phase change upon exposure to a saline solution. Also disclosed are in situ methods for regenerating anti-fouling filters having the fouling resistant coating.
    Type: Application
    Filed: June 14, 2012
    Publication date: December 19, 2013
    Inventors: Rahul Ganguli, Vivek Mehrotra, Tony Ten-Luen Liao
  • Publication number: 20130334123
    Abstract: The present disclosure describes a method for forming microporous membranes. More specifically, vapor induced phase separation techniques are used for forming multizone microporous membranes having improved material throughput.
    Type: Application
    Filed: August 23, 2013
    Publication date: December 19, 2013
    Applicant: 3M INNOVATIVE PROPERTIES COMPANY
    Inventors: Ilyess H. Romdhane, Mikhail S. Mezhirov
  • Publication number: 20130327704
    Abstract: An electrochemical separation membrane and the manufacturing method thereof are disclosed. The method includes: a polymer solution preparing step to mix a polymer material, solvent and ceramic precursors thoroughly to form a polymer solution, wherein the polymer material and the ceramic precursors are dissolved uniformly in the solvent; a coating step to coat the polymer solution on a porous base material; a hydrolysis step to cause the porous base material coated with the polymer solution to contact an aqueous solution to hydrolyze the ceramic precursor into ceramic particles; and a drying step to remove the water and the solvent from the porous base material and in order to form the electrochemical separation membrane. The electrochemical separation membrane made of this method have better ion conductivity, interface stability and thermal stability based on the ceramic particles.
    Type: Application
    Filed: November 7, 2012
    Publication date: December 12, 2013
    Applicant: ENERAGE INC.
    Inventors: Mark Y. Wu, Cheng-Yu Hsieh, Yuan-Hsin Chang, Jing-Ru Chen, Shu-Ling Hsieh
  • Patent number: 8580098
    Abstract: Electrostatic filters, systems and methods having separate positively and negatively charged filter elements within electrically isolated filter tanks for electrostatically filtering particles from a fluid flow. Both positive charged connections biased to earth ground and negative charged connections biased to earth ground are made to the respective positive and negative charged filter elements, along with triboelectric induced charge accumulations from the fluid flow, for separating charged particles within the fluid flowing parallel through these oppositely charged filter elements. Variable resistors of a power supply connected to such filters, systems and methods provide for controlling and adjusting for any undesired voltage excesses and/or shortfalls within these filter tanks so that the fluid flowing exiting these filter tanks is unbiased to generate a filtered fluid having balanced electrostatic charges.
    Type: Grant
    Filed: September 13, 2012
    Date of Patent: November 12, 2013
    Assignee: McCormick and Munson Technologies, LLC
    Inventors: Gerald L. Munson, Daniel P. McCormick, David M. Butler
  • Patent number: 8580161
    Abstract: Photochromic materials that are useful for a variety of applications, including for making various unit functions of fluidic devices, particularly microfluidic devices, such as microchannels, valves and gates, using spiropyran materials, such as a polymeric composition comprising a spiropyran. In certain disclosed embodiments the spiropyran is admixed with a polymeric material. For example, the spiropyran may be intercalated into a polyalkylene or polyalkylene phthalate. The spiropyran also may be polymerized with at least one additional monomer to form a heteropolymer, such as by polymerization with styrene, styrene derivatives, acrylate and acrylate derivatives. The spiropyran compositions can be used to make, for example, a photoactuatable valve, a fluidic channel, etc. The valve may be associated with a microchannel, including photochromic microchannel. In certain disclosed embodiments, the valve, at least one microchannel, or both, are re-patternable by light exposure.
    Type: Grant
    Filed: May 4, 2011
    Date of Patent: November 12, 2013
    Assignee: State of Oregon acting by and through the State Board of Higher Education on behalf of Oregon State University
    Inventors: Vincent Thomas Remcho, Jintana Nammoonnoy, Myra Koesdjojo
  • Patent number: 8561811
    Abstract: A substrate having compounds disposed thereon for immobilizing a functional molecule, each compound having a chain including: a moiety R that is chemically coupled to the substrate, the moiety R being selected from the group consisting of an ether, ester, carbonyl, carbonate ester, thioether, disulfide, sulfinyl, sulfonyl, and carbonothioyl; and an epoxide-containing moiety that is coupled to the moiety R by a linker including at least one nucleophilic group. Methods of preparing the substrate and use of the substrate are also disclosed.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: October 22, 2013
    Assignee: Temasek Polytechnic
    Inventors: Christian Gert Bluchel, Yanmei Wang
  • Patent number: 8550256
    Abstract: A method of photo-grafting onto a separation membrane a copolymer includes at least one of: and; For example, in Structure 1A, x1?2 and y1?1; R1 and R2 are independently selected from the group consisting of CH3 and H; R3 is independently selected from the group consisting of poly(oxyalkylene), quaternary ammonium salts, pyridinium salts, sulfonium salts, sulfobetaines, carboxybetaines, alcohols, phenols, tertiary amines, aryl groups; linear, branched and cyclic alkylenes; linear, branched and cyclic heteroalkylenes; linear, branched and cyclic fluoroalkylenes; and siloxyl; R4 is independently selected from the group consisting of linear, branched, and cyclic alkylenes; linear, branched and cyclic hetroalkylenes; linear, branched and cyclic fluoroalkylenes; phenyl; and siloxyl; and Z1 is 0 or 1.
    Type: Grant
    Filed: July 27, 2012
    Date of Patent: October 8, 2013
    Assignee: International Business Machines Corporation
    Inventors: Jacquana T. Diep, Young-Hye Na, Ankit Vora
  • Publication number: 20130213880
    Abstract: A separation membrane is provided containing hydrophilic molecules and having, as formed on at least one surface of a feed side and a permeate side thereof, a height difference of from 80 ?m to 2000 ?m, in which a weight of the hydrophilic molecules in a bone-dry separation membrane is from 0.1% to 40% based on a weight of the bone-dry separation membrane from which the weight of the hydrophilic molecules has been subtracted.
    Type: Application
    Filed: October 21, 2011
    Publication date: August 22, 2013
    Applicant: TORAY INDUSTRIES, INC.
    Inventors: Hiroho Hirozawa, Masakazu Koiwa, Kentaro Takagi, Yutaro Suzuki, Katsufumi Oto, Masahiro Fimura
  • Patent number: 8511482
    Abstract: A method of producing a porous membrane, the method comprising: casting a polymer solution, in which a polymer is dissolved in a mixture of a good solvent, a poor solvent and a non-solvent, over a support, so as to form a casted polymer solution; drying the casted polymer solution, so as to form a cast film; and subjecting the cast film to a phase separation, wherein the porous membrane is produced under a condition where a temperature of a casted surface is lower than a temperature of the polymer solution, and each of a temperature change of the polymer solution and a temperature change of the casted surface is kept within ±3.0° C.
    Type: Grant
    Filed: September 15, 2005
    Date of Patent: August 20, 2013
    Assignee: Kurashiki Boseki Kabushiki Kaisha
    Inventors: Hideaki Tanaka, Yoshihiko Makino
  • Patent number: 8496123
    Abstract: The invention relates to a process for making porous cross-linked cellulose membranes and processes for coupling a chromatography ligand to cross-linked cellulose membranes. The invention provides methods for separating a first component from a second component in a solution based upon a difference in the size of the first and second components, and methods for separating target molecules from other components in a solution comprising use of membranes obtainable by the process of the invention. The method has particular utility in separating proteins from cell lysates and cultures.
    Type: Grant
    Filed: July 24, 2006
    Date of Patent: July 30, 2013
    Assignee: GE Healtcare Bio-Sciences AB
    Inventors: Andreas Axen, Anders Hagvall, Anders Larsson, Nicolas Thevenin
  • Publication number: 20120312737
    Abstract: Functionalized membranes for use in applications, such as electrodeionization, can be prepared simply and efficiently by associating a first element of a specific binding pair to a membrane surface and binding a second species comprising the second element of the specific binding pair and at least one functional group to form a complex on the membrane surface. Such membranes may be reversibly modified by disassociating the complex, thereby, providing a fresh surface which may be re-modified according to the preceding methods.
    Type: Application
    Filed: June 13, 2011
    Publication date: December 13, 2012
    Applicant: EMPIRE TECHNOLOGY DEVELOPMENT LLC
    Inventor: Seth Adrian Miller
  • Patent number: 8293091
    Abstract: Electrostatic filters, systems and methods having separate positively and negatively charged filter elements within electrically isolated filter tanks for electrostatically filtering particles from a fluid flow. Both positive charged connections biased to earth ground and negative charged connections biased to earth ground are made to the respective positive and negative charged filter elements, along with triboelectric induced charge accumulations from the fluid flow, for separating charged particles within the fluid flowing parallel through these oppositely charged filter elements. Variable resistors of a power supply connected to such filters, systems and methods provide for controlling and adjusting for any undesired voltage excesses and/or shortfalls within these filter tanks so that the fluid flowing exiting these filter tanks is unbiased to generate a filtered fluid having balanced electrostatic charges.
    Type: Grant
    Filed: June 26, 2009
    Date of Patent: October 23, 2012
    Assignee: McCormick and Munson Technologies, LLC
    Inventors: Gerald L. Munson, David M. Butler, Daniel P. McCormick
  • Patent number: 8273245
    Abstract: The present disclosure describes devices useful for microscale fluid purification, separation, and synthesis. Such devices generally comprise a fluid membrane that separates two or more fluids flowing through plural microchannels operatively associated with the membrane. Often, the membrane is a semipermeable membrane, such as might be used with a filtration device, such as a dialyzer. Devices of the present invention can be combined with other microscale devices to make systems. For example, the devices may be coupled with one or more microchemical microfactories, one or more micromixers, one or more microheaters, etc. Examples of devices made according to the present invention included an oxygenator, a dialyzer, microheat exchangers, etc.
    Type: Grant
    Filed: November 9, 2011
    Date of Patent: September 25, 2012
    Assignee: State of Oregon acting by and through the State Board of Higher Education on behalf of Oregon State University
    Inventors: Goran Nadezda Jovanovic, Sundar V. Atre, Brian Kevin Paul, Vincent Thomas Remcho, Chih-hung Chang
  • Publication number: 20120228214
    Abstract: A porous membrane may have a high concentration of spherical fillers with a polymer binder. The polymer binder may have an affinity for the filler materials and may hold the filler materials together in a porous structure with high tortuosity and consistent pore size. The membrane may be manufactured with a reinforcing web, such as non-woven web. The membrane may be greater than 50% porous with a less than 1 micron pore size. Within the pore walls that may be less than 0.02 microns in width, a densely packed filler material may have an average diameter of less than 0.005 microns.
    Type: Application
    Filed: March 13, 2012
    Publication date: September 13, 2012
    Applicant: POROUS POWER TECHNOLOGIES
    Inventors: Kirby W. Beard, Ann M. Edwards
  • Publication number: 20120190091
    Abstract: Disclosed herein are processes for removing water from organic compounds, especially polar compounds such as alcohols. The processes include a membrane-based dehydration step, using a membrane that has a dioxole-based polymer selective layer or the like and a hydrophilic selective layer, and can operate even when the stream to be treated has a high water content, such as 10 wt % or more. The processes are particularly useful for dehydrating ethanol.
    Type: Application
    Filed: July 26, 2011
    Publication date: July 26, 2012
    Applicant: MEMBRANE TECHNOLOGY AND RESEARCH, INC.
    Inventors: Yu Huang, Jennifer Ly, Tiem Aldajani, Richard W. Baker
  • Patent number: 8205754
    Abstract: A fluorine resin polymer separation membrane and a manufacturing method of the same, which are excellent in a virus-eliminating property, further excellent in water permeability, chemical strength (chemical resistance), physical strength, and an antifouling property, and particularly suitable for practicable use as a filtration membrane for the elimination of viruses, are provided. A fluorine resin polymer separation membrane includes a layer having a three-dimensional network structure and a layer having a spherical structure, in which the layer having a three-dimensional network structure does not substantially contain micro-voids having a void diameter of 5 ?m or more, and the fluorine resin polymer separation membrane has filtration performance represented by the elimination rate of 80% or more of dextran having molecular weight of 75,000. The layer having a three-dimensional network structure is formed by the solidification with a polymer solution containing a fluorine resin polymer and cellulose ester.
    Type: Grant
    Filed: July 25, 2006
    Date of Patent: June 26, 2012
    Assignee: Toray Industries, Inc.
    Inventors: Masayuki Hanakawa, Shin-ichi Minegishi
  • Patent number: 8173021
    Abstract: The present invention relates to methods for the preparation of functionalized sulfated cellulose membranes. In particular, the present invention relates to the preparation of sulfated cellulose membranes under specific reaction conditions allowing to provide a sulfated cellulose membrane useful for pseudo-affinity purification. In another aspect, the present invention relates to the sulfated cellulose membrane itself as well as its use for isolation of proteinaceous compositions. Finally, the present invention provides a method for isolating whole virus, virus proteins or heparin binding molecules comprising the step of affinity purification using the sulfated cellulose membrane according to the present invention.
    Type: Grant
    Filed: October 16, 2009
    Date of Patent: May 8, 2012
    Assignee: Max-Planck-Gesellschaft zur Förderung der Wissenschaften e.V.
    Inventors: Michael Wolff, Udo Reichl, Lars Opitz
  • Publication number: 20120085697
    Abstract: The present invention the manufacture of a membrane for gas and liquid separations in which a polymer layer is applied directly to a tricot fabric instead of the conventional cloth or glass or metal substrate.
    Type: Application
    Filed: December 19, 2011
    Publication date: April 12, 2012
    Applicant: UOP LLC
    Inventor: Man-Wing Tang
  • Patent number: 8137554
    Abstract: The present disclosure describes devices useful for microscale fluid purification, separation, and synthesis devices. Generally, such devices comprise a fluid membrane that separates two or more fluids flowing through plural microchannels operatively associated with the membrane. The fluids can both be liquids, gases, or a liquid and a gas, such as may be used for gas absorption into a liquid. Often, the membrane is a semipermeable membrane, such as might be used with a filtration device, such as a dialyzer. Devices of the present invention can be combined with other microscale devices to make systems. For example, the devices may be coupled with one or more microchemical microfactories, one or more micromixers, one or more microheaters; etc. Examples of devices made according to the present invention included an oxygenator, a dialzyer, microheat exchangers, etc. Particular materials had to be developed for use with certain embodiments of the device disclosed herein.
    Type: Grant
    Filed: April 29, 2011
    Date of Patent: March 20, 2012
    Assignee: State of Oregon acting by and through the State Board of Higher Education on behalf of Oregon State University
    Inventors: Goran Jovanovic, Sundar V. Atre, Brian Kevin Paul, John Simonsen, Vincent Thomas Remcho, Chih-Hung Chang
  • Patent number: 8123945
    Abstract: A method is provided for producing a high flux, high salt rejection cellulose acetate desalination membrane. In this method, cellulose acetate polymer is dissolved in a first solvent such as methylene chloride or 2-methyltetrahydrofuran to produce a solution. Further steps involve stirring the solution, and thereafter permitting the solution to settle, for a time sufficient for a majority of the cellulose acetate to precipitate out of the solution to form a cellulose acetate precipitate. Next, the cellulose acetate precipitate is stirred into an excess methanol. Thereafter, the cellulose acetate is filtered out and used in making the desalination membrane.
    Type: Grant
    Filed: May 9, 2007
    Date of Patent: February 28, 2012
    Assignees: The United States of America as represented by the Secretary of the Interior, The Bereau of Reclamation, Separation Systems Technology Inc.
    Inventors: Andrew Patrick Murphy, Saied Delagah, Robert Lee Riley
  • Publication number: 20120043275
    Abstract: The present invention generally related to a nanofabricated membrane including polymerized proteoliposomes. The nanofabricated membrane is a bio-nano fused selective membrane using protein-incorporated uv-crosslinkable liposomes with a chemical reactive biocompatible interstitial matrix. In the present invention, internally UV-crosslinked protein-incorporated proteolipsomes are used because the proteoliposomes made by natural lipids have a short life time and a weak resistance to the circumstantial stresses such as a high and low temperature, pressure, ionic strength etc. Furthermore, the proteo-vesicles made by amphiphilic block copolymers provide less consistency in accomplishing proper functionality batch to batch because of the inevitable polydiversity of the polymer.
    Type: Application
    Filed: February 3, 2010
    Publication date: February 23, 2012
    Inventors: Carlo Montemagno, Chandrasmitha Bhatt, Jinsoo Yi, Theiss Stenstroem
  • Publication number: 20120000846
    Abstract: A method of forming a polymer coated hydrolyzed membrane includes forming a membrane from a first hydrophilic polymer by immersion precipitation, coating the membrane with a thin layer of a second hydrophilic polymer more pH tolerant than the first hydrophilic polymer to form a dense rejection layer, and exposing the coated membrane to a high pH solution thereby forming a hydrolyzed ultrafiltration membrane. A polymer coated hydrolyzed membrane includes a porous membrane formed from a first hydrophilic polymer by immersion precipitation and from hydrolysis, and a dense rejection layer applied to the membrane and formed from a second hydrophilic polymer more pH tolerant than the first hydrophilic polymer.
    Type: Application
    Filed: May 3, 2011
    Publication date: January 5, 2012
    Inventor: John R. Herron
  • Patent number: 8057672
    Abstract: Provided is a disposable multi-layered filtration device for the separation of blood plasma which can be applied to a biochip and appropriate for disposal uses. The filtration device for the separation of blood plasma includes: an upper substrate including a blood inlet; an intermediate substrate including a filtering unit for extracting blood plasma from blood flowing through the blood inlet; and a lower substrate including an air outlet, wherein the upper substrate, the intermediate substrate, and the lower substrate are stacked and adhered.
    Type: Grant
    Filed: June 4, 2008
    Date of Patent: November 15, 2011
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Kwang Hyo Chung, Yo Han Choi, Dae Sik Lee, Ju Hyun Jeon, Moon Youn Jung, Seon Hee Park
  • Publication number: 20110210064
    Abstract: The invention discloses a filtration material for desalination, including a support layer, and a desalination layer formed on the support layer, wherein the desalination layer is a fiber composite membrane and includes at least one water-swellable polymer. The water-swellable polymer is made of hydrophilic monomers and hydrophobic monomers, and the hydrophilic monomers include ionic monomers and non-ionic monomers, and the ionic monomers include cationic monomers and anionic monomers.
    Type: Application
    Filed: December 21, 2010
    Publication date: September 1, 2011
    Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE
    Inventors: Shu-Hui Cheng, Jong-Pyng Chen, En Kuang Wang, Yi-Chun Lo, Shan-Shan Lin
  • Publication number: 20110198282
    Abstract: A membrane is provided including a coating layer having cellulose nanofibers produced from oxidized cellulose microfibers and an electrospun substrate upon which the coating layer is applied. The nanofibers of the electrospun substrate have a diameter greater than that of the cellulose nanofibers. The membrane also has non-woven support upon which the electrospun substrate is disposed. Microfibers of the non-woven support have a diameter greater than that of the nanofibers of the electrospun substrate. Application of electrospun membrane is in microfiltration area, while the cellulose nanofiber membrane serves in ultra-filtration, nanofiltration, and reverse osmosis after chemical modification.
    Type: Application
    Filed: October 7, 2009
    Publication date: August 18, 2011
    Applicant: THE RESEARCH FOUNDATION OF STATE UNIVERSITY OF NEW YORK
    Inventors: Benjamin Chu, Benjamin s. Hsiao, Hongyang Ma
  • Publication number: 20110174720
    Abstract: Described is the application of layer-by-layer (LbL) electrostatic assembly techniques to electrospun nanofibers in order to fabricate novel, breathable electrospun fiber-based chemical and biological detoxifying protective fabrics and filters. The combination of layer-by-layer electrostatic assembly and electrospinning technique allows one to take advantage of high specific surface area, light weight and breathability of electrospun fiber mats while simultaneously providing the versatility to incorporate different functional polyelectrolytes to achieve multifunctional coatings for both chemical and biological protection together. The functionalized fiber mats can be incorporated into breathable chemical and biological protective fabrics, filters and masks. In addition, LbL electrostatic coating of porous non-woven materials provides the versatility to generate multifunctional polymer-based membrane materials for other applications.
    Type: Application
    Filed: July 21, 2010
    Publication date: July 21, 2011
    Applicant: Massachusetts Institute of Technology
    Inventors: Liang Chen, Lev E. Bromberg, T. Alan Hatton, Gregory C. Rutledge
  • Patent number: 7964019
    Abstract: A membrane for gas separation includes a porous support layer and a separation layer. The separation layer comprises a mixture of one or more saccharide derivatives and one or more homopolymers. The saccharide derivative(s) may have a cyclic structure with five or six ring atoms, or a linear structure, or may include monosaccharide derivatives which are bound via glycoside bonds, and the number of monosaccharides bound in this manner may be 2 to 1,000. A membrane can be produced by preparing a homogeneous solution which comprises a saccharide derivative and a homopolymer in a solvent; and pouring the homogenous solution onto a support layer. The membrane may be used in a gas separation module the operation of which makes use of the membrane.
    Type: Grant
    Filed: March 19, 2009
    Date of Patent: June 21, 2011
    Assignee: GKSS-Forschungszentrum Geesthacht GmbH
    Inventors: Jun Qiu, Klaus-Viktor Peinemann, Jan Wind, Holger Pingel
  • Patent number: 7955504
    Abstract: The present disclosure describes devices useful for microscale fluid purification, separation, and synthesis devices. Generally, such devices comprise a fluid membrane that separates two or more fluids flowing through plural microchannels operatively associated with the membrane. Often, the membrane is a semipermeable membrane, such as might be used with a filtration device, such as a dialyzer. Devices of the present invention can be combined with other microscale devices to make systems. For example, the devices may be coupled with one or more microchemical microfactories, one or more micromixers, one or more microheaters; etc. Particular materials had to be developed for use with certain embodiments of the device disclosed herein. For example, a new composite material was made comprising nanocrystalline cellulose filler and a polysulfone polymeric material. A dialyzer comprising the composite membrane also is disclosed.
    Type: Grant
    Filed: October 4, 2005
    Date of Patent: June 7, 2011
    Assignee: State of Oregon acting by and through the State Board of Higher Education on behalf of Oregon State University
    Inventors: Goran Jovanovic, Sundar V. Atre, Brian Kevin Paul, John Simonsen, Vincent Thomas Remcho, Chih-Hung Chang