Diffusing Or Passing Through Septum Selective As To Material Of A Component Of Liquid Patents (Class 210/649)
  • Publication number: 20040164023
    Abstract: Process for microfiltration at elevated temperature.
    Type: Application
    Filed: September 25, 2003
    Publication date: August 26, 2004
    Inventors: Lars Hojlund Christensen, Torben Kjaersgaard Nielsen
  • Patent number: 6780324
    Abstract: The instant invention is directed toward a process for the production of a sterile, stabilized nanodispersion or loaded micelle comprising a polymer and a biologically active composition; particularly to nanodispersions produced by rehydration of a freeze-dried cake produced via the direct lyophilization of a stabilized solution comprising a polymer, such as an amphiphilic block copolymer or a small molecular weight surfactant, a biologically active agent, an optional additive, and a suitable solvent.
    Type: Grant
    Filed: March 18, 2002
    Date of Patent: August 24, 2004
    Assignee: Labopharm, Inc.
    Inventors: Dorothée Le Garrec, Meriam Kabbaj, Jean-Christophe Leroux
  • Publication number: 20040149659
    Abstract: A well (50) comprising a side wall (10), a sealing ring (40), a rib arrangement (5), and a filter (20), for use in processing a fluid, e.g., by microtitration or microfiltration, is disclosed.
    Type: Application
    Filed: November 18, 2003
    Publication date: August 5, 2004
    Inventor: Jeffrey Kane
  • Publication number: 20040149658
    Abstract: The process of heavy metals removal from the waste water using silica dispersion without mixing silica dispersion with the waste water. This is achieved due to the membrane device where silica dispersion and waste water stream are separated by membrane with pore sizes smaller that size of the silica particles. The process is organized as counter-flow, which means that silica dispersion and waste water flow in the opposite directions. This provides the maximum utilization of the adsorption capacity corresponding to the adsorbent being in equilibrium with the high initial concentration of the contaminant in distinction from the low utilization when adsorbent works in equilibrium with the low output concentration. In the particular instance the membrane device comprises a lumen of a bundle of hollow fibers with silica dispersion flowing either inside or outside of the fibers and wastewater flowing on the opposite side of the fiber membrane. This process eliminates step of separating silica from the wastewater.
    Type: Application
    Filed: August 3, 2001
    Publication date: August 5, 2004
    Inventors: Andrei S. Dukhin, Stanislav Dukhin, Philip J. Goetz
  • Patent number: 6770202
    Abstract: The present invention provides integral porous membranes comprising an amorphous halopolymer, as well as processes for preparing the membranes, and devices comprising the membranes. An example of an amorphous halopolymer is a copolymer of tetrafluoroethylene and perfluoro-2,2-dimethyl-1,3-dioxole.
    Type: Grant
    Filed: February 4, 2002
    Date of Patent: August 3, 2004
    Assignee: Pall Corporation
    Inventors: Stanley Kidd, Thomas C. Gsell
  • Patent number: 6767466
    Abstract: A filter unit for removing leukocytes from a leukocyte-containing suspension by passing the suspension through a filter unit. The filter unit may comprise a main filter for blocking the leukocytes and a post-filter for preventing leakage of the leukocytes having a higher median pore size than the main filter and placed downstream of the main-filter.
    Type: Grant
    Filed: April 8, 2002
    Date of Patent: July 27, 2004
    Assignee: Teva Medical Ltd.
    Inventors: Menahem Kraus, Yefet Gamlieli
  • Publication number: 20040104170
    Abstract: A method for separating at least one lower polarity fluid from a mixture of fluids having varying polarity, comprising contacting at least one low polarity or non-polar polymeric membrane with the mixture of fluids under conditions such that the at least one lower polarity fluid selectively permeates through the membrane, wherein the membrane is one which has a ratio of heteroatoms chemically bonded to the carbon atoms in the membrane to the number of carbon atoms of less than about 0.2, preferably less than about 0.05.
    Type: Application
    Filed: July 9, 2003
    Publication date: June 3, 2004
    Inventors: J. Scott Buchanan, Lawrence J. Altman, John W. Diehl
  • Publication number: 20040099603
    Abstract: There is provided a process for separating at least one phase transfer agent (PTA) from an organic liquid mixture containing at least one organic solvent and at least one PTA, in which the organic liquid mixture is brought into contact with one surface of a selectively permeable membrane and pressure is applied to the organic liquid mixture which causes a fraction of the organic liquid to permeate through the membrane and exit at the other surface, such that the concentration of the at least one PTA in the fraction of organic liquid which does not permeate the membrane increases while the concentration of the at least one PTA in the fraction of organic liquid which permeates through the membrane is less than the concentration of the at least one PTA in the original mixture.
    Type: Application
    Filed: December 22, 2003
    Publication date: May 27, 2004
    Inventor: Andrew Guy Livingston
  • Patent number: 6736961
    Abstract: A process for removing sulfur from a hydrocarbon employs a solid membrane. A feed stream is provided containing a feed liquid hydrocarbon and a feed sulfur species and a sweep stream is provided containing a sweep liquid hydrocarbon. A relatively large quantity of the feed stream is conveyed past one side of the solid membrane, while a relatively small quantity of the sweep stream is conveyed past the opposite side of the solid membrane. The feed sulfur species is transported in a permeate from the feed stream through the solid membrane to the sweep stream. As a result, the feed stream is converted to a relatively large quantity of a substantially sulfur-free reject stream containing a primary hydrocarbon product, while the sweep stream combines with the permeate to produce a relatively small quantity of a sulfur-enriched stream, which is amenable to further processing.
    Type: Grant
    Filed: January 30, 2001
    Date of Patent: May 18, 2004
    Assignee: Marathon Oil Company
    Inventors: Mark A. Plummer, Richard F. Bonelli, Jr.
  • Publication number: 20040084378
    Abstract: The present invention is directed to a filtration system including filter media that use diffusion as a method of particulate reduction that balances the contact time required for a desirable level of interception and filter performance. The filter system of the present invention includes a filter medium that removes particulate contaminants by diffusion, means for providing sufficient contact time for an influent to contact the filter medium such that the filter medium can intercept sub-micron particulates at an average flow rate below that of an on-demand or instantaneous flow rate; and a storage buffer for providing a filtered effluent at a rate independent of the average flow rate required to achieve adequate particulate reduction through the filter medium.
    Type: Application
    Filed: December 3, 2002
    Publication date: May 6, 2004
    Inventor: Evan E. Koslow
  • Publication number: 20040079704
    Abstract: The present invention relates to a method for isolation of ionic species from a liquid and an apparatus for isolation of ionic species from a liquid. Moreover the invention relates to an electro enhanced dialysis cell and the use of the cell in the method and the apparatus.
    Type: Application
    Filed: July 23, 2003
    Publication date: April 29, 2004
    Inventors: Arvid Garde, Jens-Ulrik Rype, Gunnar Jonsson
  • Publication number: 20040069710
    Abstract: An apparatus and method for recovering bioproducts from a feed solution. In one embodiment, the apparatus includes a module housing, a membrane means disposed in the housing for filtering the bioproducts from the feed solution wherein a portion of the membrane means is coated with a polymeric coating, and an adsorbent bed disposed in the housing for retaining the bioproducts which permeate through the membrane, wherein the apparatus is adapted to allow fractionation and purification of the retained bioproducts from the bed by elution.
    Type: Application
    Filed: May 12, 2003
    Publication date: April 15, 2004
    Inventors: Kamalesh K. Sirkar, Robert G. Luo, Yanke Xu, Xiao-Ping Dai
  • Publication number: 20040045903
    Abstract: The invention relates to methods of treating contaminated fluids especially formalin. The device being able to pass a large volume of solid, lipid and cell contaminated material through it and being stable from shipping problems.
    Type: Application
    Filed: September 6, 2002
    Publication date: March 11, 2004
    Applicant: Creative Waste Solutions, Inc.
    Inventor: Rexford Charles Johnson
  • Patent number: 6702945
    Abstract: Methods for the separation of sulfur compounds from a hydrocarbon mixture using an ionic membrane are provided. Preferred ionic membranes are Nafion®-type (polymers of perfluorosulfonic acid) membranes and derivatives thereof. Preferred applications include the removal of sulfur contaminants from light cracked naphthas.
    Type: Grant
    Filed: December 12, 2001
    Date of Patent: March 9, 2004
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: Robert J. Saxton, Bhupender S. Minhas
  • Publication number: 20040035792
    Abstract: The invention relates to a device and a method for separating undissolved constituents out of biological fluids, especially for separating blood plasma out of whole blood. It is to propose a simple and cost-effective way by means of which undissolved constituents can be separated out of biological fluids, in particular blood plasma out of whole blood, and the pure fluid is presenting then as a pure liquid volume without any substrate. To solve this object, e.g., whole blood is placed into a feed chamber. The feed chamber is isolated in an all-over manner by means of a membrane from a per se closed cavity having a small height. The cavity is connected to a flow channel or an opening from which the/the separated blood plasma can be removed.
    Type: Application
    Filed: August 27, 2003
    Publication date: February 26, 2004
    Inventors: Peter R Rauch, Andreas Katerkamp, Marco Schmitz, Frank Grawe
  • Patent number: 6649061
    Abstract: A process for the separation of sulfur compounds from a hydrocarbon mixture using a membrane is provided. Preferred hydrocarbon mixtures are oil refining fractions such as light cracked naphtha. Membranes are composed of either ionic or non-ionic materials and preferentially permeate sulfur compounds over other hydrocarbons. A single or multi-stage membrane system separates the hydrocarbon mixture into a sulfur-rich fraction and a sulfur-lean fraction. The sulfur-lean fraction may be used in fuel mixtures and the sulfur-rich fraction may be further treated for sulfur reduction.
    Type: Grant
    Filed: December 12, 2001
    Date of Patent: November 18, 2003
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: Bhupender S. Minhas, Michael R. Chuba, Robert J. Saxton
  • Patent number: 6649063
    Abstract: A method and device for renal replacement therapy is described that sterile-filters solution that can subsequently be used as a replacement fluid in the same unit. The devices and methods include a pump that can be reversed from its normal forward-pumping direction to sterilize a container of replacement fluid to produce sterile replacement fluid. The sterile replacement fluid is captured in a fluid bag. Upon sterilization of the contents of the container, the pump switches to run in its normal forward-pumping direction. The sterile replacement fluid produced by the previous process is now injected into a patient to perform renal replacement therapy. The waste produced during the renal replacement therapy can be trapped in the container that previously held the non-sterile solution. Systems for sterile filtration and subsequent renal replacement therapy that include pre-connected, sterilized, disposable kits for fluid management and batch collection of sterilized fluid are also described.
    Type: Grant
    Filed: July 12, 2001
    Date of Patent: November 18, 2003
    Assignee: NxStage Medical, Inc.
    Inventors: James M. Brugger, Jeffrey H. Burbank, Dennis M. Treu
  • Patent number: 6649062
    Abstract: A process for the separation of mixture components uses a supercritical fluid that is fresh to at least one side of a nonporous membrane after which the fluid is either recycled to the opposite side of the membrane or removed from the separation process. Fluids and membranes, including modified membranes, are provided to facilitate passage of one or more components of a mixture through the membrane while retarding passage of other components of the mixture. The process is useful for the separation of mixtures with similar components including axeotropic mixtures and pharmaceutical and biological products.
    Type: Grant
    Filed: March 25, 1997
    Date of Patent: November 18, 2003
    Inventor: Stephen E. Petty
  • Publication number: 20030189003
    Abstract: A filter unit for removing leukocytes from a leukocyte-containing suspension by passing the suspension through a filter unit. The filter unit may comprise a main filter for blocking the leukocytes and a post-filter for preventing leakage of the leukocytes having a higher median pore size than the main filter and placed downstream of the main-filter.
    Type: Application
    Filed: April 8, 2002
    Publication date: October 9, 2003
    Inventors: Menahem Kraus, Yefet Gamlieli
  • Publication number: 20030183573
    Abstract: The present invention relates to a method for obtaining a purified solid powder from highly concentrated, semi-liquid, high viscous solutions containing one or more solutes and a first solvent. The method comprises contacting the highly concentrated solution with a second solvent under high shear mixing, wherein the second solvent is miscible with the first solvent and wherein the solute has very low solubility or no solubility at all in the second solvent. Thereby a suspension of purified fine particles is obtained which can be easily separated to obtain a fine powder of the solute.
    Type: Application
    Filed: April 1, 2002
    Publication date: October 2, 2003
    Inventors: Uriel G. Cegla, Moshe Shuster
  • Publication number: 20030183575
    Abstract: Methods and systems for monitoring and/or controlling membrane separation systems or processes are provided. The present invention utilizes measurable amounts of inert fluorescent tracers and tagged fluorescent agents added to a feed stream to evaluate and/or control one or more parameters specific to membrane separation such that performance thereof can be optimized. The methods and systems of the present invention can be utilized in a variety of different industrial applications including raw water processing and waste water processing.
    Type: Application
    Filed: March 28, 2002
    Publication date: October 2, 2003
    Inventors: E.H. Kelle Zeiher, Bosco P. Ho, John E. Hoots
  • Publication number: 20030178368
    Abstract: The invention relates to charged filtration membranes and their use for separation of a protein from solvent, low molecular weight solutes or a mixture of proteins. Modification of the membranes to generate charge includes modification of membrane pores to alter charge within a pore and alter the size of a pore. Consequently, the protein is separated from other solutes in a mixture based on size as well as net protein charge and membrane charge.
    Type: Application
    Filed: April 16, 2003
    Publication date: September 25, 2003
    Inventor: Robert D. van Reis
  • Patent number: 6623644
    Abstract: The present invention is drawn to polyamide ligand-containing polymeric resins and methods of using the same for removing, separating, and/or concentrating certain desired metal ions from solutions, even when the desired ions are in the presence of other metal ions and/or hydrogen ions at much higher concentrations. The unique composition of matter of this invention is a polyamide ligand-containing polymeric resin which is a reaction product of a hydroxymethylated polyamide ligand and a polymerization and/or crosslinking agent. Specifically, the polymeric resins of the present invention are comprised of from 10 to 50,000 polyamide ligand units wherein each polyamide ligand unit contains at least three amide groups (preferably from three to eight amide groups) and two amine groups separated by at least two carbons. Each amide group, after polymerization, may remain hydroxymethylated or be crosslinked to other polyamide ligand units through a crosslinking agent.
    Type: Grant
    Filed: September 27, 2001
    Date of Patent: September 23, 2003
    Assignee: IBC Advanced Techologies, Inc.
    Inventors: Ronald L. Bruening, Krzysztof E. Krakowiak
  • Publication number: 20030111414
    Abstract: Membrane module for substance-specific treatment of fluids, in which are arranged first and second membrane elements (1, 2) with one end pointing toward a distribution space (8) and the other toward a collection space (9), each having a cavity (10,11) formed by the membrane wall. The first membrane elements (1) have their ends embedded in sealing compounds (4, 5) such that their cavities are open and open into the distribution space (8) and collection space (9). The second membrane elements (2) are also embedded in the sealing compound (5) at the end pointing toward the collection space (9), their cavities opening into the collection space, but are closed at the end pointing toward the distribution space (8).
    Type: Application
    Filed: November 12, 2002
    Publication date: June 19, 2003
    Inventors: Ulrich Baurmeister, Rudolf Wollbeck
  • Patent number: 6554993
    Abstract: A membrane process for the removal of sulfur species from a naphtha feed, in particular, a FCC light cat naphtha, without a substantial loss of olefin yield is disclosed. The process involves contacting a naphtha feed stream with a membrane having sufficient flux and selectivity to separate a sulfur deficient retentate fraction from a sulfur enriched permeate fraction, preferably, under pervaporation conditions. Sulfur deficient retentate fractions are useful directly into the gasoline pool. Sulfur-enriched permeate fractions are rich in sulfur containing aromatic and nonaromatic hydrocarbons and are further treated with conventional sulfur removal technologies, e.g. hydrotreating, to reduce sulfur content. The process of the invention provides high quality naphtha products having a reduced sulfur content and a high content of olefin compounds.
    Type: Grant
    Filed: February 16, 2001
    Date of Patent: April 29, 2003
    Assignee: W.R. Grace & Co.-Conn.
    Inventors: Lloyd Steven White, Richard Franklin Wormsbecher, Markus Lesemann
  • Publication number: 20030075507
    Abstract: A system and method for separating a hydrocarbon fluid stream and a disposal fluid stream and for dispersing the disposal fluid stream into a body of water. The system includes a production string located in a body of water, and a membrane positioned in the production string for separating the hydrocarbon fluid and the disposal fluid by passing the disposal fluid through the membrane. The membrane separation system provides an efficient solution to disperse disposal fluids removed from a hydrocarbon production stream into a body of water in a controllable and ecologically friendly manner.
    Type: Application
    Filed: October 24, 2001
    Publication date: April 24, 2003
    Inventors: Curtis L. Munson, Michael Dubrovsky
  • Publication number: 20030024881
    Abstract: The present invention provides a composite membrane comprising a porous support layer and a selective layer comprising a vinylacetate polymer. The invention also provides a process for preparing a vinylacetate polymer selective layer on a porous support by depositing a colloidal dispersion having colloid particles of the vinylacetate polymer on the porous support followed by annealing the deposited colloids to form a selective layer. The membranes are useful for separation of gas or liquid or vapor mixtures.
    Type: Application
    Filed: May 3, 2001
    Publication date: February 6, 2003
    Inventor: Dilip Gurudath Kalthod
  • Patent number: 6514412
    Abstract: An active fluid separation device for removing a constituent of a fluid mixture. The separation device formed from a first polymeric structured layer having a plurality of flow channels defined in one surface, and a selectively permeable fluid separation media covering at least some of the flow channels. An external source is also included to provide a potential over the flow channels to promote movement of the fluid through the separation media, thereby removing a constituent component of the fluid mixture. A manifold in fluid contact with the flow channels of the structured layer may also be used to operatively permit the source to provide the potential over the flow channels.
    Type: Grant
    Filed: June 18, 1998
    Date of Patent: February 4, 2003
    Assignee: 3M Innovative Properties Company
    Inventors: Thomas I. Insley, Raymond P. Johnston
  • Patent number: 6508935
    Abstract: Described in the present invention are a method for determining the pore size distribution of a membrane filter based on the molecular mass distribution curve of the rejected solute fraction of a feed solution when the feed is passed through the membrane, and an apparatus suitable for practicing said method.
    Type: Grant
    Filed: May 22, 2001
    Date of Patent: January 21, 2003
    Assignee: Kwangju Institute of Science & Technology
    Inventors: Jaeweon Cho, Sangyoup Lee, Youngho Cho
  • Patent number: 6494223
    Abstract: A wet cleaning apparatus can remove trace heavy metals, colloidal matter or other impurities contained in ultra-pure water to be used as rinse water in semiconductor cleaning processes and suppress deposit of trace impurities such as heavy metals or other particles that would otherwise cause characteristics of such devices to deteriorate. A wet cleaning apparatus for rinsing with ultra-pure water as a rinse liquid by supplying ultra-pure water through a piping to a rinse location inside the apparatus. The rinse location is a point of use of the ultra-pure water. The wet cleaning apparatus includes a module filled with porous film in which polymer chains having at least one of an anion exchange group, a cation exchange group, and a chelating group are held in the middle of the piping positioned inside the apparatus. The wet cleaning apparatus further includes a means for adding hydrogen gas to the rinse liquid.
    Type: Grant
    Filed: September 22, 2000
    Date of Patent: December 17, 2002
    Assignees: Organo Corporation
    Inventors: Tadahiro Ohmi, Kazuhiko Kawada, Toshihiro II, Masatoshi Hashino, Noboru Kubota
  • Patent number: 6495047
    Abstract: Alum, used as a coagulant in water treatment, is recovered from clarifier sludge by adjusting the pH of the sludge downward to produce an aqueous clarifier sludge solution, and contacting the aqueous clarifier sludge solution with one side of a semi-permeable cation exchange membrane while contacting the other side of the membrane with an acidic sweep solution. By virtue of the Donnan co-ion exclusion phenomenon, aluminum ions, which are trivalent, pass readily through the membrane, in preference to divalent and monovalent cations, and consequently heavy metal carryover is relatively low. Organic matter carryover is substantially excluded, and consequently, the recovered alum can be reused without the potential for trihalomethane formation. The reactor is preferably in the form of a stack of spaced membranes, with the aqueous clarifier sludge solution and the acid sweep solution flowing through alternate spaces. The same process can be used for recovery of ferric iron coagulants.
    Type: Grant
    Filed: March 21, 2001
    Date of Patent: December 17, 2002
    Inventors: Arup K. SenGupta, Prakhar Prakash
  • Publication number: 20020179531
    Abstract: Alum, used as a coagulant in water treatment, is recovered from clarifier sludge by adjusting the pH of the sludge downward to produce an aqueous clarifier sludge solution, and contacting the aqueous clarifier sludge solution with one side of a semi-permeable cation exchange membrane while contacting the other side of the membrane with an acidic sweep solution. By virtue of the Donnan co-ion exclusion phenomenon, aluminum ions, which are trivalent, pass readily through the membrane, in preference to divalent and monovalent cations, and consequently heavy metal carryover is relatively low. Organic matter carryover is substantially excluded, and consequently, the recovered alum can be reused without the potential for trihalomethane formation. The reactor is preferably in the form of a stack of spaced membranes, with the aqueous clarifier sludge solution and the acid sweep solution flowing through alternate spaces. The same process can be used for recovery of ferric iron coagulants.
    Type: Application
    Filed: March 21, 2001
    Publication date: December 5, 2002
    Inventors: Arup K. SenGupta, Prakhar Prakash
  • Patent number: 6489132
    Abstract: Methods and apparatus for qualitatively or quantitatively determining one or more analytes in matrices such as foods, biological fluids, etc. An embodiment for determination of a single analyte comprises a sample receiving vessel, a first membrane and a reagent-containing well. The prepared sample passes through the first membrane whereby extraneous matter is removed, and a filtrate enters the reagent-containing well to provide a filtrate-reagent admixture from which the analyte may be determined. An embodiment for determination for multiple analytes includes one or more additional membranes in series with the first membrane, each such additional membrane being operative to capture one or more analytes. Each of the additional analytes may then be eluted from the membrane upon which it has been captured, into a separate reagent-containing well to provide eluant-reagent admixture from which each desired analyte may be determined. Formulations for preparation additives are also included.
    Type: Grant
    Filed: September 2, 1999
    Date of Patent: December 3, 2002
    Assignee: Safety Associates, Inc.
    Inventors: Virginia C. Gordon, John T. Sorensen, Soheila Mirhashemi, Michael Mittelstein, John F. Elias
  • Patent number: 6486306
    Abstract: Filtration methods comprise virus-filtering a solution containing a least one macromolecule. In one embodiment, the total salt content of the solution is within the range of from about 0.2 M to 2 M. In another embodiment, the total salt content of the solution is within the range of from about 0.2 M up to saturation with a salt, and the salt is selected from the group consisting of sodium chloride, potassium chloride, sodium acetate, sodium citrate, sodium phosphate, potassium dyhydrophosphate and combinations thereof. In yet another embodiment, the total salt content of the solution is within the range of from about 0.2 M up to saturation with the salt and the macromolecule is in solution during the virus filtering.
    Type: Grant
    Filed: December 12, 1996
    Date of Patent: November 26, 2002
    Assignee: Biovitrum AB
    Inventor: Stefan Winge
  • Publication number: 20020139713
    Abstract: A process for removing sulfur from a hydrocarbon employs a solid membrane. A feed stream is provided containing a feed liquid hydrocarbon and a feed sulfur species and a sweep stream is provided containing a sweep liquid hydrocarbon. A relatively large quantity of the feed stream is conveyed past one side of the solid membrane, while a relatively small quantity of the sweep stream is conveyed past the opposite side of the solid membrane. The feed sulfur species is transported in a permeate from the feed stream through the solid membrane to the sweep stream. As a result, the feed stream is converted to a relatively large quantity of a substantially sulfur-free reject stream containing a primary hydrocarbon product, while the sweep stream combines with the permeate to produce a relatively small quantity of a sulfur-enriched stream, which is amenable to further processing.
    Type: Application
    Filed: January 30, 2001
    Publication date: October 3, 2002
    Inventors: Mark A. Plummer, Richard F. Bonelli
  • Patent number: 6454946
    Abstract: The invention provides methods for purifying carbohydrates, including oligosaccharides, nucleotide sugars, and related compounds, by use of ultrafiltration, nanofiltration and/or reverse osmosis. The carbohydrates are purified away from undesired contaminants such as compounds present in reaction mixtures following enzymatic synthesis or degradation of oligosaccharides.
    Type: Grant
    Filed: October 9, 1997
    Date of Patent: September 24, 2002
    Assignee: Neose Technologies, Inc.
    Inventor: Shawn DeFrees
  • Patent number: 6454958
    Abstract: A method of operating a milling bath wherein a metal workpiece to be milled is immersed in a milling bath containing a milling medium, the metal oxidizing owing to a chemical reaction between the metal and milling medium and being transformed into a soluble complex. The resultant mixture is subjected to a separation process which separates the excess milling medium from the complex, the recovered milling medium being used for the further operation of milling baths and the complex being subjected to a preparation process. A mixture of dissolved complexed metallic ions and milling medium is removed from the milling bath at a concentration of dissolved complexed metallic ions which is far below the saturation limit thereof. The separation process is a nanofiltration process in which the milling medium is separated from the mixture according to the principle of reverse osmosis, the residue simultaneously being concentrated with complexed metallic ions.
    Type: Grant
    Filed: December 13, 1999
    Date of Patent: September 24, 2002
    Assignee: DaimlerChrysler AG
    Inventor: Karsten Loehr
  • Publication number: 20020074285
    Abstract: A treatment unit is disclosed for treating a fluid in continuous. This treatment unit provides the opportunity to carry out simultaneously an enzymatic transformation and a capture of a fluid element. The unit has a reservoir with a fluid inlet for receiving a fluid to be treated and a fluid outlet for releasing a treated fluid. The unit also has removable cassettes provided with a reactive material for treating the fluid and two spaced-apart baffle walls in the reservoir for regulating the flow of the fluid therein. The unit further has a reaction chamber defined between each of the two spaced-apart baffles walls. The reaction chamber has an opening for removably inserting therein the cassette. Yet, the unit further has mounting means for mounting the cassette in a reaction chamber spaced-apart from the two baffle walls, whereby a cassette is disposed between two spaced-apart baffle walls and causes the fluid to flow in a zigzag pattern thus further regulating the flow of the fluid.
    Type: Application
    Filed: December 19, 2000
    Publication date: June 20, 2002
    Inventor: Carmen Parent
  • Patent number: 6399357
    Abstract: Filtration methods comprise virus-filtering a solution containing at least one macromolecule. The total salt content of the solution is within the range of from about 0.2M to 2M or within the range of from about 0.2M up to saturation with the salt.
    Type: Grant
    Filed: February 23, 2000
    Date of Patent: June 4, 2002
    Assignee: Biovitrum AB
    Inventor: Stefan Winge
  • Publication number: 20020050477
    Abstract: Specification discloses the use of a dynamic cross-flow filtration system for the filtration of mash. Also disclosed are a mashing process, wherein mash is filtered and wort is obtained, and a process for the preparation of beer, as well as apparatuses and devices for performing one or more of these process.
    Type: Application
    Filed: April 19, 2001
    Publication date: May 2, 2002
    Inventors: Markus Lotz, Horst Randhahn, Rolf Berndt, Gebhardt Muller
  • Patent number: 6358754
    Abstract: Novel solid phase reaction supports are disclosed. The solid phase reaction supports include (a) a solid phase carrier having a multiplicity of NH2 functional groups; (b) a coupling compound covalently bonded to an NH2 group of the solid phase carrier; and (c) a receptor compound coupled to the solid phase carrier through the coupling compound. The coupling compound is preferably ascorbic acid, dehydroascorbic acid or a diketo compound structurally similar to ascorbic acid or dehydroascorbic acid. The solid phase carrier is preferably made of cellulose.
    Type: Grant
    Filed: July 10, 1998
    Date of Patent: March 19, 2002
    Assignee: Forschungszentrum Julich GmbH
    Inventors: Peter Berlin, Jörg Tiller, Dieter Klemm
  • Patent number: 6350621
    Abstract: Novel solid phase reaction supports are disclosed. The solid phase reaction supports include (a) a solid phase carrier having a multiplicity of NH2 functional groups of the Formula (I): in which R1 and R2 are each H, or R1 is H and R2 is an alkyl or acyl substituent with a degree of substitution ≦1 or R1 is an alkyl or acyl substituent with a degree of substitution ≦1, and R2 is H, or R1 and R2 are each a substituent with a degree of substitution ≦2 and R3 is an aromatic substituent containing at least one free amino group having a substitution degree ≦1; (b) a coupling compound covalently bonded to an NH2 group of the solid phase carrier; and (c) a receptor compound coupled to the solid phase carrier through the coupling compound.
    Type: Grant
    Filed: April 25, 2000
    Date of Patent: February 26, 2002
    Assignee: Forshungszentrum Mulich GmbH
    Inventors: Peter Berlin, Jörg Tiller, Dieter Klemm
  • Patent number: 6348162
    Abstract: An apparatus for use in whole body hypothermia includes a dialyzer having a blood side and a dialysate side separated by one or more dialysis membranes. A blood pump associated with the a blood circuit established on the blood side circulates blood through the dialyzer at high rates advantageous for hyperthermia treatments. A bypass is included whereby circulated blood can bypass the dialyzer. The bypass aids in preventing blood-side tensioning of dialyzer membranes thereby allowing proper membrane movement to assist in mixing a sorbent suspension circulated on the dialysate side of the dialyzer. A sorbent suspension composition for use as a dialysate in hemodialysis, especially when performed in conjunction with whole body hyperthermia, includes water, a surface adsorptive agent such as charcoal, a cation exchanger, and precipitated calcium phosphate. The precipitated calcium phosphate serves as a reservoir for calcium and phosphate ions to assist in controlling patient blood chemistries.
    Type: Grant
    Filed: April 3, 2000
    Date of Patent: February 19, 2002
    Assignee: ViaCirq, Inc.
    Inventor: Stephen R. Ash
  • Patent number: 6312655
    Abstract: The invention relates to the absorption of carbon dioxide from a process gas using a solution of potassium carbonate, potassium bicarbonate, diethanolamine and potassium vanadate, followed by desorption of the carbon dioxide from the solution and recycling the regenerated solution. Organic acid salts of potassium build up in the aqueous solution is diluted with aqueous diluent, and then passed over a semi-permeable membrane such as a nanofiltration membrane, and ultrafiltration membrane or a reverse-osmosis membrane using a pressure drop to remove the organic acid salts of potassium from the side stream.
    Type: Grant
    Filed: July 13, 1999
    Date of Patent: November 6, 2001
    Assignee: Sasol Technology (Proprietary) Limited
    Inventors: Horst Joachim Franz August Hesse, Mathys Johannes Smit, Francois Jacobus du Toit
  • Patent number: 6309550
    Abstract: The invention relates to a method for transferring mass between a flow of a first fluid, preferably a gas phase such as a combustion flue gas, and flow of a second fluid, preferably a liquid phase, where the first fluid is contacted with the outer surface of porous (semi-permeable) membranes, e.g. Polytetrafluoroethylene (PTFE, Teflon®) membranes, in the form of hollow fibers having gas-containing pores and containing the second fluid with the inner surface of the membranes. Useful membranes are characterized in that they e.g. have a porosity (&egr;) of at least 0.50, a mass transfer coefficient of e.g. at least 3 cm/s, and a tortuosity factor of e.g. at the most 1.4/&egr; when the porosity &egr; is lower than 0.80 and at the most 1.3/&egr; when the porosity &egr; is 0.80 or higher. The membranes may also be arranged in hollow tubular members where the mass transfer coefficient of the membranes is at least on tenth of the mass transfer coefficient of the gas phase.
    Type: Grant
    Filed: January 22, 1997
    Date of Patent: October 30, 2001
    Assignee: FLS Miljo A/S
    Inventors: Steen Brummerstedt Iversen, Vinay Kumar Bhatia, Kim Dam-Johansen, Gunnar Jonsson
  • Patent number: 6270674
    Abstract: A membrane module for substance-specific treatment of a fluid includes a housing with a bundle of hollow-fiber membranes with semipenneable, porous walls. The hollow-fiber membranes are embedded in a sealing compound only at one end, and flow around the second end is substantially unrestricted. The lumina of the hollow-fiber membranes are open at the unembedded end and lead into the external space surrounding the hollow-fiber membranes. The fluid to be treated is introduced via an inlet arrangement on only one of the two sides (inside or outside) of the hollow-fiber membranes and directed over this side as a primary stream such that a portion thereof flows as a permeate stream through the wall to the respective other side, the substance-specific treatment taking place on the permeate stream. After passing through the wall, the permeate stream is collected on the other side and reunited with the primary stream in the external space.
    Type: Grant
    Filed: December 14, 1999
    Date of Patent: August 7, 2001
    Assignee: Akzo Nobel NV
    Inventors: Ulrich Baurmeister, Rudolf Wollbeck
  • Patent number: 6265615
    Abstract: A new polymeric material, a process for forming the material and method of using the material to separate enantiomers of chiral compounds, particularly amino acids and pharmaceuticals are disclosed. A polymeric material can be formed from polyaniline doped with a chiral acid and then extracted with a suitable base. This leaves behind a polymeric material which preferentially traps, and then selectively releases, one enantiomer of a chiral mixture brought in contact with the surface of the polymeric material. In particular, when polyaniline is doped with either R- or S-camphorsulfonic acid (CSA) it takes on a chiral structure. Removing the chiral acid dopant leads to a new chiral polyaniline. The dedoped chiral polyanilines have the ability to discriminate among enantiomers of many compounds which exist in chiral mixtures.
    Type: Grant
    Filed: May 28, 1999
    Date of Patent: July 24, 2001
    Assignee: The Regents of the University of California
    Inventors: Richard B. Kaner, Charles M. Knobler, Hailan Guo
  • Publication number: 20010003329
    Abstract: An electro-regenerating type apparatus for producing deionized water, which comprises an electrodialyzer having cation exchange membranes and anion exchange membranes alternately arranged between an anode compartment provided with an anode and a cathode compartment provided with a cathode, demineralizing compartments compartmentalized with the anion exchange membranes on the anode side and compartmentalized with the cation exchange membranes on the cathode side, and concentrating compartments compartmentalized with the cation exchange membranes on the anode side and compartmentalized with the anion exchange membranes on the cathode side, the electrodialyzer having ion exchangers accommodated in the demineralizing compartments, wherein a porous anion exchanger layer having a porosity of from 20 to 95%, a maximum pore size of from 0.01 to 500 &mgr;m and a thickness of at least five times the maximum pore size and from 10 &mgr;m to 10 mm, is provided on the anode side of each anion exchange membrane.
    Type: Application
    Filed: December 8, 2000
    Publication date: June 14, 2001
    Applicant: Asahi Glass Company, Limited
    Inventors: Yoshio Sugaya, Yukio Matsumura, Hiroshi Toda
  • Patent number: 6241892
    Abstract: A solvent purification system and method of reducing the contamination level thereof are provided. Contaminated solvent is directed under pressure across at least one cross-flow membrane unit, and the waste stream therefrom is conveyed through at least one membrane precipitator unit to precipitate out contaminant, or selectively precipitate out solutes.
    Type: Grant
    Filed: June 29, 1998
    Date of Patent: June 5, 2001
    Assignee: NM Tech Research Foundation
    Inventor: Thomas M. Whitworth
  • Patent number: 6238566
    Abstract: Proposed is an improvement in a multi-stage solvent extraction process of a metal value such as rare earth elements from an acidic feed solution containing the metal value in the form of a water-soluble salt by bringing the aqueous solution into contact with a water-immiscible organic extractant solution containing an extractant compound which releases an acid when combined with the metal ions.
    Type: Grant
    Filed: February 17, 1998
    Date of Patent: May 29, 2001
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Norifumi Yoshida, Jun-ichi Nakayama