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Fluorine-containing ethylene copolymers
PATENTS
Fluorine-containing ethylene copolymers Applicant: E.I. Du Pont De Nemours and Co, USA This invention covers a fluorinecontaining ethylene copolymer (FCEC) obtained through the copolymerization of ethylene with suitable fluorine-containing comonomer compounds. The fluorine-containing comonomer compound is present at a concentration of up to 40% by weight, based on the total weight of the ethylene copolymer. FCEC is described as being useful in a
variety of applications, for example, as microporous membranes; as a release resin in low surfaceenergy release films; as meltblown fibres; in composite or multi-layer structures as a low surface-energy outer layer; as flash-spun plexi-filamentary products; and as melt-spun fibrous products. Patent number: WO 03/076483 Inventors: R.T. Chou, S.L. Samuels and R.K. Siemionko Publication date: 18 September 2003
Minimizing carbon transfer in an electrolytic cell Applicant: BHP Billiton Innovation Pty Ltd, Australia An electrolytic cell for reducing a metal oxide, such as titania (in a solid state) is disclosed. The electrolytic cell includes an anode, formed from carbon, and a cathode, formed at least in part from the metal oxide. The electrolytic cell also includes a membrane that is permeable to oxygen anions and
is impermeable to carbon in ionic and nonionic forms. This is positioned between the cathode and the anode in such a way that it prevents migration of carbon to the cathode. Patent number: WO 03/076692 Inventors: L. Strezov, I. Ratchev, S. Osborn and S.A. Bliznyukov Publication date: 18 September 2003
Detecting characteristics of porous medium using ultrasonics Applicant: Millipore Corp, USA Plate waves are used to determine the presence of defects within a porous medium, such as a membrane. An acoustic wave can be propagated through a porous medium to create a plate wave within that medium. The plate wave creates fast compression waves and slow compression waves within the medium that relate to the material and its structural properties. The fast com-
pression wave provides information about the total porosity of a medium. On the other hand, the slow compression wave provides information about the presence of defects in the medium or the types of materials that form the medium. Patent number: WO 03/081226 Inventors: M.L. Peterson (Jr), A.J. Dileo, Z.M. Wang and A. Greenberg Publication date: 2 October 2003
Patent WO 03/076692 provides details of an electrolytic cell for reducing a metal oxide, such as titania.
Reaction-bonded alumina filter and membrane support Fabric-reinforced capillary membranes for UF Applicant/Inventors: K. Vossenkaul, Germany, and S. Schafer, Germany
The subject of patent WO 03/076055 is a method of producing fabric-reinforced capillary membranes, in particular for ultrafiltration applications.
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The invention relates to a method of producing fabric-reinforced capillary membranes, in particular for ultrafiltration (UF) applications. According to the method described, a fabric tube (1) is coated with a polymer solution and is guided through a precipitation bath (6), where the polymer solution is converted into a microporous layer. In this way, a membrane that is reinforced by the fabric tube is formed. The invention is characterized in that the fabric tube, coated with the polymer solution, passes through the bath without mechanical contact from top to bottom, and exits via a lower nozzle (7). A liquid, flowing through this nozzle enables a tensile force (that stabilizes the course of the coated fabric tube) to be exerted on the capillary membrane (8), which exits the precipitation bath. Patent number: WO 03/076055 Publication date: 18 September 2003
Applicant: Ceramem Corp, USA A reaction-bonded alumina filter element is the subject of this patent. The filter element (1) includes a monolith of porous material having multiple passageways (2) extending from one end face (3) to an opposing end face (4). The monolith is extruded from a mixture that contains at least aluminium metal and alumina powders in a proportion such that on
sintering the volume change of the monolith is minimized. The filter body can be used as a filter or as a membrane support for crossflow or dead-end flow filter elements. A method for making the filter element is also described. Patent number: WO 03/078672 Inventors: B.A. Bishop, P.J. Hayward, R.L. Goldsmith and G.G. Haacke Publication date: 25 September 2003
A reaction-bonded alumina filter element is the subject of patent WO 03/078672.
Membrane Technology December 2003
Fluorine-containing ethylene copolymers Applicant: E.I. Du Pont De Nemours and Co, USA This invention covers a fluorinecontaining ethylene copolymer (FCEC) obtained through the copolymerization of ethylene with suitable fluorine-containing comonomer compounds. The fluorine-containing comonomer compound is present at a concentration of up to 40% by weight, based on the total weight of the ethylene copolymer. FCEC is described as being useful in a
variety of applications, for example, as microporous membranes; as a release resin in low surfaceenergy release films; as meltblown fibres; in composite or multi-layer structures as a low surface-energy outer layer; as flash-spun plexi-filamentary products; and as melt-spun fibrous products. Patent number: WO 03/076483 Inventors: R.T. Chou, S.L. Samuels and R.K. Siemionko Publication date: 18 September 2003
Minimizing carbon transfer in an electrolytic cell Applicant: BHP Billiton Innovation Pty Ltd, Australia An electrolytic cell for reducing a metal oxide, such as titania (in a solid state) is disclosed. The electrolytic cell includes an anode, formed from carbon, and a cathode, formed at least in part from the metal oxide. The electrolytic cell also includes a membrane that is permeable to oxygen anions and
is impermeable to carbon in ionic and nonionic forms. This is positioned between the cathode and the anode in such a way that it prevents migration of carbon to the cathode. Patent number: WO 03/076692 Inventors: L. Strezov, I. Ratchev, S. Osborn and S.A. Bliznyukov Publication date: 18 September 2003
Detecting characteristics of porous medium using ultrasonics Applicant: Millipore Corp, USA Plate waves are used to determine the presence of defects within a porous medium, such as a membrane. An acoustic wave can be propagated through a porous medium to create a plate wave within that medium. The plate wave creates fast compression waves and slow compression waves within the medium that relate to the material and its structural properties. The fast com-
pression wave provides information about the total porosity of a medium. On the other hand, the slow compression wave provides information about the presence of defects in the medium or the types of materials that form the medium. Patent number: WO 03/081226 Inventors: M.L. Peterson (Jr), A.J. Dileo, Z.M. Wang and A. Greenberg Publication date: 2 October 2003
Patent WO 03/076692 provides details of an electrolytic cell for reducing a metal oxide, such as titania.
Reaction-bonded alumina filter and membrane support Fabric-reinforced capillary membranes for UF Applicant/Inventors: K. Vossenkaul, Germany, and S. Schafer, Germany
The subject of patent WO 03/076055 is a method of producing fabric-reinforced capillary membranes, in particular for ultrafiltration applications.
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The invention relates to a method of producing fabric-reinforced capillary membranes, in particular for ultrafiltration (UF) applications. According to the method described, a fabric tube (1) is coated with a polymer solution and is guided through a precipitation bath (6), where the polymer solution is converted into a microporous layer. In this way, a membrane that is reinforced by the fabric tube is formed. The invention is characterized in that the fabric tube, coated with the polymer solution, passes through the bath without mechanical contact from top to bottom, and exits via a lower nozzle (7). A liquid, flowing through this nozzle enables a tensile force (that stabilizes the course of the coated fabric tube) to be exerted on the capillary membrane (8), which exits the precipitation bath. Patent number: WO 03/076055 Publication date: 18 September 2003
Applicant: Ceramem Corp, USA A reaction-bonded alumina filter element is the subject of this patent. The filter element (1) includes a monolith of porous material having multiple passageways (2) extending from one end face (3) to an opposing end face (4). The monolith is extruded from a mixture that contains at least aluminium metal and alumina powders in a proportion such that on
sintering the volume change of the monolith is minimized. The filter body can be used as a filter or as a membrane support for crossflow or dead-end flow filter elements. A method for making the filter element is also described. Patent number: WO 03/078672 Inventors: B.A. Bishop, P.J. Hayward, R.L. Goldsmith and G.G. Haacke Publication date: 25 September 2003
A reaction-bonded alumina filter element is the subject of patent WO 03/078672.
Membrane Technology December 2003