multi-well plate processing device

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respective polymers in a solution in such a manner that both polymer solutions remain in a homogenous state in the form of polymer solution mixtures. Both of the polymer solu- tions are brought into contact with each other in the nozzle of an extruder, forming a layer- shaped polymer solution compound and simultaneously extracting the compound in this form from the nozzle of the extractor. The polymer solution compound is extruded in a coagulation bath, and it is immersed in a phase inversion – extracting at least partially, and in a known manner, the components not formed by the membrane on the double-lay- ered structure and, if necessary, treating the remainder. The structure is preferably a hollow membrane, and this can be used as a support membrane for bio-hybrid organs. Patent number: WO 03/008677 Inventors: W. Albrecht, T. Weigel, T. Groth, B. Seifert, R. Hilke and D. Paul Publication date: 30 January 2003 Regenerative membrane purification device Applicant: Solar Dew BV, The Netherlands A device for evaporation and condensation of water from an aqueous liquid is the subject of this invention. This can be achieved by means of a temperature difference and/or concentra- tion difference. The device comprises a vapour chamber which is, or can be, brought into contact with a condensation compartment (in which at least part of the water vapour from the aqueous liquid condenses, and in which the inside of the vapour chamber is located). Also required is an evaporation compartment that has at least a wall with an outer surface, and comprises a closed, hollow and water-per- meable membrane, characterized in that the compartment is adapted to receive heat by means of direct solar radiation. The device offers a way of regenerating latent heat. The latent heat is released during condensation of water vapour, and this is used to heat the aqueous liquid. Patent number: WO 03/008338 Inventors: J. Van Berkel, M.J.A. Fraters and J.G.H.J. Noij Publication date: 30 January 2003 Multi-well plate processing device Applicant: Vivascience AG, Germany The subject of this patent is a device, in the form of a multi-well plate, for simultaneous processing of discrete quantities of flowable material for the purpose of, for example, purification, concentration or extraction of target substances. It comprises an injection- moulded body, with a number of receptacles, each of which has an entry end opening, for introduction of an individual charge of the flowable material, and an exit opening for an outflow of at least part of the material. A sin- gle membrane, for example, an ion exchange or a filtration membrane, is fixed to the body through a bonding process to close the exit openings of the receptacles and form an exter- nal face of the device. The membrane is formed with individual effective zones, each closing the exit opening of the respective receptacles, and each is separated in terms of flow from the outer zones. These zones can be defined by cuts that extend entirely through the membrane. Patent number: WO 03/008100 Inventors: C.R. Biddell, S. Fischer-Fruhholz and C.K. Lanyi Publication date: 30 January 2003 Electrochemical reactor with filtering membrane Applicant: Electricite de France Service National, France This invention concerns an electric membrane reactor that has been specially adapted to elec- tro-catalytic reactions. It also covers methods for using the reactor. The reactor combines, in the same working section, a membrane filter and electrochemical component so as to main- tain free in solution certain reagents, while retaining them in the immediate proximity of the working electrode. Patent number: WO 03/008089 Inventors: S. Trevin, K. Delecouls-Servat, R. Basseguy, J. Prosdocimi and A. Bergel Publication date: 30 January 2003 Asymmetric gel-filled microporous membranes Applicant: McMaster University, USA This patent provides details of asymmetric membranes that are composed of a micro- porous substrate whose pores contain a crosslinked gel. The density of the crosslinked gel is greater at, or adjacent to, one major sur- face of the membrane than the density at the other major surface. The membranes are useful for separating matter from liquids and display good flux and good rejection at a low pressure. Patent number: WO 03/008078 Inventors: R.F. Childs, A.M. Mika, J. Ge and C. McCrory Publication date: 30 January 2003 Rotary-disc device for dynamic filtering Applicant: Centre National de la Recherche Scientifique, France, and Environnement - Partenariat - Recherches - Optimisation - Gestion - Realisation - Equipements Speciaux - Services pour l’Environnement (P.R.O.G.- R.E.S.S.), France This invention concerns a modular dynamic filtering device with rotary discs. It comprises membranes that are arranged on either side of fixed support plates. The modular construc- tion enables the filtering device to be universal and adaptable by users so that it can be used for different types of filtration procedures ranging from microfiltration to nanofiltration, and even reverse osmosis. Patent number: WO 03/008077 Inventors: P.A.C. Boulnois, R. Bouzerar, M.Y. Jaffrin and P.R.D. Paullier. Publication date: 30 January 2003 Dual-head pump-driven membrane system Applicant: Miox Corp, USA Improvements in product water throughput from a reverse osmosis (RO) membrane have been achieved by thinner feed spacers in an RO element; enhanced recovery (ratio of per- meate to feed); pressure recovery of the reten- tate fluid pressure, opposing the feed water pressure; and fluid pulsing of the RO element feed stream. These features are preferably com- bined to optimize the performance and cost per unit volume of the water that is produced. The system described in this patent preferably comprises a dual-head reciprocating pump, an RO element, with a housing, and a differential pressure activated valve. The latter, in combi- nation with offsetting fluid pressures on the two pump heads, generates energy recovery. The frequency and amplitude of the recipro- cating pump create a pulse wave in the RO element that improves permeate quality and throughput. A control system monitors system parameters to optimize the reciprocating pump speed and amplitude to tune the opti- mal frequency and amplitude required for maximum throughput and permeate quality from any given element configuration. Patent number: WO 03/008076 Inventors: R.E. Herrington and F.R. Hand Publication date: 30 January 2003 Reverse osmosis device Applicant/Inventors: D. Reichwein, Austria, and O. Peters, Austria The invention relates to a device for carrying out a reverse osmosis (RO) on a medium for separation, driven by a hydrostatic pressure using a conventional RO device, with a pres- sure side and a product side, which are both separated by means of a semipermeable mem- brane. The medium for separation, on the pressure side, is pressurized by means of a pressure-generating device. This device contains a pressure-liquefying working medi- um with a critical temperature of between 20°C and 100°C, in which a pressure increase and volume increase may be generated by heat. Patent number: WO 03/008075 Publication date: 30 January 2003 PATENTS 12 Membrane Technology April 2003

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respective polymers in a solution in such amanner that both polymer solutions remain ina homogenous state in the form of polymersolution mixtures. Both of the polymer solu-tions are brought into contact with each otherin the nozzle of an extruder, forming a layer-shaped polymer solution compound andsimultaneously extracting the compound inthis form from the nozzle of the extractor. Thepolymer solution compound is extruded in acoagulation bath, and it is immersed in aphase inversion – extracting at least partially,and in a known manner, the components notformed by the membrane on the double-lay-ered structure and, if necessary, treating theremainder. The structure is preferably a hollowmembrane, and this can be used as a supportmembrane for bio-hybrid organs.Patent number: WO 03/008677Inventors: W. Albrecht, T. Weigel, T. Groth, B. Seifert, R. Hilke and D. Paul Publication date: 30 January 2003

Regenerative membrane purification deviceApplicant: Solar Dew BV, The NetherlandsA device for evaporation and condensation ofwater from an aqueous liquid is the subject ofthis invention. This can be achieved by meansof a temperature difference and/or concentra-tion difference. The device comprises a vapour chamber which is, or can be, brought into contact with a condensation compartment (inwhich at least part of the water vapour fromthe aqueous liquid condenses, and in whichthe inside of the vapour chamber is located). Also required is an evaporation compartmentthat has at least a wall with an outer surface,and comprises a closed, hollow and water-per-meable membrane, characterized in that thecompartment is adapted to receive heat bymeans of direct solar radiation. The deviceoffers a way of regenerating latent heat. Thelatent heat is released during condensation ofwater vapour, and this is used to heat theaqueous liquid.Patent number: WO 03/008338Inventors: J. Van Berkel, M.J.A. Fraters andJ.G.H.J. NoijPublication date: 30 January 2003

Multi-well plate processing deviceApplicant: Vivascience AG, GermanyThe subject of this patent is a device, in theform of a multi-well plate, for simultaneousprocessing of discrete quantities of flowablematerial for the purpose of, for example,purification, concentration or extraction oftarget substances. It comprises an injection-moulded body, with a number of receptacles,each of which has an entry end opening, forintroduction of an individual charge of the

flowable material, and an exit opening for anoutflow of at least part of the material. A sin-gle membrane, for example, an ion exchangeor a filtration membrane, is fixed to the bodythrough a bonding process to close the exitopenings of the receptacles and form an exter-nal face of the device. The membrane isformed with individual effective zones, eachclosing the exit opening of the respectivereceptacles, and each is separated in terms offlow from the outer zones. These zones can bedefined by cuts that extend entirely throughthe membrane.Patent number: WO 03/008100Inventors: C.R. Biddell, S. Fischer-Fruhholz andC.K. LanyiPublication date: 30 January 2003

Electrochemical reactor with filtering membraneApplicant: Electricite de France ServiceNational, FranceThis invention concerns an electric membranereactor that has been specially adapted to elec-tro-catalytic reactions. It also covers methodsfor using the reactor. The reactor combines, inthe same working section, a membrane filterand electrochemical component so as to main-tain free in solution certain reagents, whileretaining them in the immediate proximity ofthe working electrode.Patent number: WO 03/008089Inventors: S. Trevin, K. Delecouls-Servat, R. Basseguy, J. Prosdocimi and A. BergelPublication date: 30 January 2003

Asymmetric gel-filled microporous membranesApplicant: McMaster University, USAThis patent provides details of asymmetric membranes that are composed of a micro-porous substrate whose pores contain acrosslinked gel. The density of the crosslinkedgel is greater at, or adjacent to, one major sur-face of the membrane than the density at theother major surface. The membranes are usefulfor separating matter from liquids and displaygood flux and good rejection at a low pressure.Patent number: WO 03/008078Inventors: R.F. Childs, A.M. Mika, J. Ge and C.McCroryPublication date: 30 January 2003

Rotary-disc device for dynamic filteringApplicant: Centre National de la RechercheScientifique, France, and Environnement -Partenariat - Recherches - Optimisation -Gestion - Realisation - Equipements Speciaux -Services pour l’Environnement (P.R.O.G.-R.E.S.S.), FranceThis invention concerns a modular dynamic filtering device with rotary discs. It comprises

membranes that are arranged on either side offixed support plates. The modular construc-tion enables the filtering device to be universaland adaptable by users so that it can be usedfor different types of filtration proceduresranging from microfiltration to nanofiltration,and even reverse osmosis.Patent number: WO 03/008077Inventors: P.A.C. Boulnois, R. Bouzerar, M.Y.Jaffrin and P.R.D. Paullier.Publication date: 30 January 2003

Dual-head pump-driven membrane systemApplicant: Miox Corp, USAImprovements in product water throughputfrom a reverse osmosis (RO) membrane havebeen achieved by thinner feed spacers in anRO element; enhanced recovery (ratio of per-meate to feed); pressure recovery of the reten-tate fluid pressure, opposing the feed waterpressure; and fluid pulsing of the RO elementfeed stream. These features are preferably com-bined to optimize the performance and costper unit volume of the water that is produced. The system described in this patent preferablycomprises a dual-head reciprocating pump, anRO element, with a housing, and a differentialpressure activated valve. The latter, in combi-nation with offsetting fluid pressures on the two pump heads, generates energy recovery. The frequency and amplitude of the recipro-cating pump create a pulse wave in the ROelement that improves permeate quality andthroughput. A control system monitors systemparameters to optimize the reciprocatingpump speed and amplitude to tune the opti-mal frequency and amplitude required formaximum throughput and permeate qualityfrom any given element configuration.Patent number: WO 03/008076Inventors: R.E. Herrington and F.R. HandPublication date: 30 January 2003

Reverse osmosis deviceApplicant/Inventors: D. Reichwein, Austria, andO. Peters, AustriaThe invention relates to a device for carryingout a reverse osmosis (RO) on a medium forseparation, driven by a hydrostatic pressureusing a conventional RO device, with a pres-sure side and a product side, which are bothseparated by means of a semipermeable mem-brane. The medium for separation, on thepressure side, is pressurized by means of a pressure-generating device. This device contains a pressure-liquefying working medi-um with a critical temperature of between20°C and 100°C, in which a pressure increaseand volume increase may be generated byheat.Patent number: WO 03/008075Publication date: 30 January 2003

PATENTS

12Membrane Technology April 2003