multi-well plate processing device
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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