- Email: [email protected]
Selectively permeable separation module
References 1. Vilker, V.L. et al. (1981) Concentration polarisation in protein ultrafiltration. Part I: An optical shadowgraph technique for measuring concentration profiles near a solutionmembrane interface, AICHE Journal 27(4) 632-637. 2. McDonogh, R.M. et al. (1990) Concentration polarization and adsorption effects in crossflow ultrafiltration of proteins, Desalination 79 2 17-23 1. 3. McDonogh, R.M. et al. (1995) Experimental in situ measurement of concentration polarization during ultra- and micro-filtration of bovine serum albumin and Dextran Blue solutions, J Membrane Sri. 104 5 l-63. 4. Mackley, M.R and Sherman, N.E. (1992) Cross-flow cake filtration mechanisms
affecting flux 53 81-93. The behavior
enhances
in of
the
separation
Applicant: Bechtel BWXT Idaho, USA A method and apparatus is provided for casting a polymeric membrane on the inside surface of porous tubes to provide a permeate filter system which is capable of withstanding hostile operating conditions, and which has excellent selectivity capabilities. Any polymer in solution, by either solvent means or melt processing means, is capable of being used in the invention to form a thin polymer membrane with a uniform thickness on the inside surface of a porous tube. Multiple tubes configured as a tubular module also can be coated with the polymer solution. By positioning the longitudinal axis of the tubes in a horizontal position and rotating the tube about the longitudinal axis, the polymer solution coats the inside surface of the porous tubes without substantially infiltrating the pores of the porous tubes. This creates a permeate filter system which has enhanced separation capabilities. Patent number: US 6036030 Inventors: M.L. Stone, C.J. Orme, E.S. Peterson Publication date: 14 March 2000
Articulated
83-97. 9. Baker, R.J. (1985) Factors crossflow filtration, Desalination 10. Belfort, G. et al. (1994)
control the flow of fluid. This performance of the filter membrane. Patent number: US 6036853 Inventor: T.F. Spencer Publication date: 14 March 2000
Patents Selectively permeable module
and kinetics, Cbem. &g, Sci. 47 3067-3084. 5. Wakeman, R.J. (1994) Visualization of cake formation in crossflow microfiltration, Trdnr. IChemE PurtA72 uuly 1994) 530-540. 6. Altmann J. and Ripperger R. (1997) Particle deposition and layer formation at the crossflow microfiltration, J Membrune Sci. 124 119-128. 7. Hodgson, PH. et al. (1993) Visual study of crossflow microfiltration with inorganic membranes: Resistance of biomass and particulate cake, Proc. 6th World Filtration Congress, Nagoya, Japan, 607-610. 8. Li, H. et al. (1998) Direct observation of particle deposition on membrane surface during crossflow microfiltration, J Membrane Sci. 149
filter core element
Applicant: Medtronic, USA A common filter assembly is formed from a filter membrane which is supported by a filter core element. The core element according to the invention is substantially planar in the as-moulded condition, but is adapted and articulated into a cylindrical configuration. The core element comprises a framework which is adapted to
Fuel cell with metal screen flowfield Applicant: University of California, USA (Los Alamos National Laboratory) A polymer electrolyte membrane (PEM) fuel cell is provided with electrodes supplied with a reactant on each side of a catalysed membrane assembly (CMA). The fuel cell includes a metal mesh which defines a rectangular flow-field pattern. This has an inlet at one corner and an outlet at the diagonally opposite corner, wherein all flow paths, from the inlet to the outlet, and through the square flow-field pattern are equivalent, to uniformly distribute the reactant over the CMA. In a preferred form of metal mesh, a square-weave screen forms the flow-field pattern. In a particular characterisation, a bipolar plate electrically connects adjacent fuel cells, where the bipolar plate includes a thin metal foil with anode and cathode sides. It also has a first metal mesh on the anode side of the thin metal foil, and a second metal mesh on the cathode side of the thin metal foil. In another characterisation, a cooling plate assembly cools adjacent fuel cells, where the cooling plate assembly includes an anode and a cathode formed from thin conducting foils. A metal mesh flow-field is located in berween for distributing cooling water over the electrodes, to remove the heat which is generated by the fuel cells. Patent number: US 6037072 Inventors: M.S. Wilson, C. Zawodzinski Publication date: 14 March 2000
Membrane-based micro-chambers
cell culture
suspensions and macromolecular solutions in crossflow microfiltration, J Membrane Sci. 96 l-58. 11. H. Li, et al. (2000) An assessment of depolarisation models of crossflow microfiltration by direct observation through the membrane, J. Membrane Sri. 172 135-147. 12. Zydney A.L. and Colton C.K. (1986) A concentration polarization model for the filtrate flux in crossflow microfiltration of particulate suspensions, Cbem. Eng. Commun. 47 l-21. For more information, contact: Dr Hongyu Li or ProfessorTony Fane, UNESCO Centre for Membrane Science &Technology, University of New South Wales, Sydney, NSW 2052, Australia. Tel: +61 2 9385 4315, Fax: +61 2 9385 5054, Email: [email protected] or [email protected]
Applicant: Microcloning CCCD, Sweden A compact arrangement for cell culture is provided by sandwiching. a grid matrix containing multiple perforations between a planar base and a semi-permeable membrane such that the perforations define microchambers for cell culture. The perforations may be in a regular pattern such as a honeycomb pattern, and be circular to form micro-chambers which have a diameter of approximately 0.2-5 mm. A magnet can be used to hold the sandwich structure together by placing a magnet on the side of the base opposite the grid matrix and a magnetically attractable film on the side of the membrane opposite the grid matrix. The base may have a diameter of approximately 5-20 cm, and be coated with an agarose layer which lacks cell affinity. A spot surface, which forms an island, and possesses cell affinity, is placed on the layer centrally within each perforation. The arrangement allows independent and simultaneous culture of multiple biological samples, and permits microscopic or spectroscopic analysis of the micro-chambers. Patent number: US 6037171 Inventor: B. Larsson Publication date: 14 March 2000
Solid-state proton and electron mediating membrane Applicant: Eltron Research, USA Mixed electron-conducting and protonconducting metal oxide materials are described. These materials are useful in the fabrication of membranes for use in catalytic membrane reactions, particularly for promoting dehydrogenation of hydrocarbons, oligomerisation of hydrocarbons, and for the decomposition of hydrogen-containing gases. Patent number: US 6037514 Inventors: J.H. White, M. Schwartz, A.F
Membrane
Technology
No. 123
affecting flux 53 81-93. The behavior
enhances
in of
the
separation
Applicant: Bechtel BWXT Idaho, USA A method and apparatus is provided for casting a polymeric membrane on the inside surface of porous tubes to provide a permeate filter system which is capable of withstanding hostile operating conditions, and which has excellent selectivity capabilities. Any polymer in solution, by either solvent means or melt processing means, is capable of being used in the invention to form a thin polymer membrane with a uniform thickness on the inside surface of a porous tube. Multiple tubes configured as a tubular module also can be coated with the polymer solution. By positioning the longitudinal axis of the tubes in a horizontal position and rotating the tube about the longitudinal axis, the polymer solution coats the inside surface of the porous tubes without substantially infiltrating the pores of the porous tubes. This creates a permeate filter system which has enhanced separation capabilities. Patent number: US 6036030 Inventors: M.L. Stone, C.J. Orme, E.S. Peterson Publication date: 14 March 2000
Articulated
83-97. 9. Baker, R.J. (1985) Factors crossflow filtration, Desalination 10. Belfort, G. et al. (1994)
control the flow of fluid. This performance of the filter membrane. Patent number: US 6036853 Inventor: T.F. Spencer Publication date: 14 March 2000
Patents Selectively permeable module
and kinetics, Cbem. &g, Sci. 47 3067-3084. 5. Wakeman, R.J. (1994) Visualization of cake formation in crossflow microfiltration, Trdnr. IChemE PurtA72 uuly 1994) 530-540. 6. Altmann J. and Ripperger R. (1997) Particle deposition and layer formation at the crossflow microfiltration, J Membrune Sci. 124 119-128. 7. Hodgson, PH. et al. (1993) Visual study of crossflow microfiltration with inorganic membranes: Resistance of biomass and particulate cake, Proc. 6th World Filtration Congress, Nagoya, Japan, 607-610. 8. Li, H. et al. (1998) Direct observation of particle deposition on membrane surface during crossflow microfiltration, J Membrane Sci. 149
filter core element
Applicant: Medtronic, USA A common filter assembly is formed from a filter membrane which is supported by a filter core element. The core element according to the invention is substantially planar in the as-moulded condition, but is adapted and articulated into a cylindrical configuration. The core element comprises a framework which is adapted to
Fuel cell with metal screen flowfield Applicant: University of California, USA (Los Alamos National Laboratory) A polymer electrolyte membrane (PEM) fuel cell is provided with electrodes supplied with a reactant on each side of a catalysed membrane assembly (CMA). The fuel cell includes a metal mesh which defines a rectangular flow-field pattern. This has an inlet at one corner and an outlet at the diagonally opposite corner, wherein all flow paths, from the inlet to the outlet, and through the square flow-field pattern are equivalent, to uniformly distribute the reactant over the CMA. In a preferred form of metal mesh, a square-weave screen forms the flow-field pattern. In a particular characterisation, a bipolar plate electrically connects adjacent fuel cells, where the bipolar plate includes a thin metal foil with anode and cathode sides. It also has a first metal mesh on the anode side of the thin metal foil, and a second metal mesh on the cathode side of the thin metal foil. In another characterisation, a cooling plate assembly cools adjacent fuel cells, where the cooling plate assembly includes an anode and a cathode formed from thin conducting foils. A metal mesh flow-field is located in berween for distributing cooling water over the electrodes, to remove the heat which is generated by the fuel cells. Patent number: US 6037072 Inventors: M.S. Wilson, C. Zawodzinski Publication date: 14 March 2000
Membrane-based micro-chambers
cell culture
suspensions and macromolecular solutions in crossflow microfiltration, J Membrane Sci. 96 l-58. 11. H. Li, et al. (2000) An assessment of depolarisation models of crossflow microfiltration by direct observation through the membrane, J. Membrane Sri. 172 135-147. 12. Zydney A.L. and Colton C.K. (1986) A concentration polarization model for the filtrate flux in crossflow microfiltration of particulate suspensions, Cbem. Eng. Commun. 47 l-21. For more information, contact: Dr Hongyu Li or ProfessorTony Fane, UNESCO Centre for Membrane Science &Technology, University of New South Wales, Sydney, NSW 2052, Australia. Tel: +61 2 9385 4315, Fax: +61 2 9385 5054, Email: [email protected] or [email protected]
Applicant: Microcloning CCCD, Sweden A compact arrangement for cell culture is provided by sandwiching. a grid matrix containing multiple perforations between a planar base and a semi-permeable membrane such that the perforations define microchambers for cell culture. The perforations may be in a regular pattern such as a honeycomb pattern, and be circular to form micro-chambers which have a diameter of approximately 0.2-5 mm. A magnet can be used to hold the sandwich structure together by placing a magnet on the side of the base opposite the grid matrix and a magnetically attractable film on the side of the membrane opposite the grid matrix. The base may have a diameter of approximately 5-20 cm, and be coated with an agarose layer which lacks cell affinity. A spot surface, which forms an island, and possesses cell affinity, is placed on the layer centrally within each perforation. The arrangement allows independent and simultaneous culture of multiple biological samples, and permits microscopic or spectroscopic analysis of the micro-chambers. Patent number: US 6037171 Inventor: B. Larsson Publication date: 14 March 2000
Solid-state proton and electron mediating membrane Applicant: Eltron Research, USA Mixed electron-conducting and protonconducting metal oxide materials are described. These materials are useful in the fabrication of membranes for use in catalytic membrane reactions, particularly for promoting dehydrogenation of hydrocarbons, oligomerisation of hydrocarbons, and for the decomposition of hydrogen-containing gases. Patent number: US 6037514 Inventors: J.H. White, M. Schwartz, A.F
Membrane
Technology
No. 123