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Preparation of ion exchange membranes
membrane cell (ff~r reaction of the purified oxygen permeate with silicon at an elevated reaction temperature) is needed in order to produce the high purity silicon reaction, and high purity silicon dioxide. Patent number." W O 01/77014 Inventors: K.B. Albaugh, N.R. Keskar Publication date: 18 October 2001
Electrophoresis separation and treatment of samples Applicant: Gradipore Ltd, Australia An electrophoresis system for separating small macromolecules has been developed. It comprises two electrophoretic systems. Each system comprises an anode buffer and cathode buffer chamber containing an anode and cathode. There is an ion-permeable separation membrane placed between the anode and cathode buffer chambers, and an ion-pernreable restriction membrane positioned either side of the ion-permeable separation membrane to define first and second interstitial volumes. An electric field is applied between the buffer chambers in which the two electrophoretic systems are in fluid communication with each other. Patent number: W O 01/78877 Inventors: B.E Conlan, A.M. Gilbert, H. Nair, L.J. Ryan, D.B. Rylatt, T.M. Thonras Publication date: 25 October 2001
Plasmid recovery Applicant." Millipore Corp, USA A process for the recovery of plasmids, or other DNA from cells has been developed. It uses a first filtration step to remove the cellular debris and other large cellular components, and then an ultrafiltration step to capture the plasnfids or other DNA on the surface of the ultrafiltration membrane where they may be recovered. An apparatus is also taught for enacting the process and comprises an upper microfiltration, or coarse filtration membrane, and a lower ultrafiltration membrane. The driving force may be the same for both filters and may be done sequentially or simultaneously. Patent number." W O 01/79486 Inventor: J.T. Leonard Publication date: 25 October 2001
Electrolytic process Applicant/Inventor: R.L. Sampson, USA, A.H. Sampson,USA and E Di Mascio, USA An improved electrolytic process and apparatus are disclosed for oxidizing or reducing inorganic and organic species, especially in dilute aqueous solutions. The electrolytic reactor includes an anode, a cathode and a monobed of cation exchange material in contact with the anode (as i the primary electrode for oxidation) and anion : exchange material in contact with the cathode i (as the primary electrode for r e d u c t i o n ) . The monobed includes both modified ion i exchange materials, modified to have active:
semiconductor junctions to enhance rhe oxidation or reduction, and unmodified ion exchange materials to enhance diffusion of the ions through the monobed. The monobed may be divided into segments including one or more particulate ion exchange resin segments, and one or more ion exchange membrane segments. Patent number: WO 01/78879 Publication date: 25 October 2001
Preparation of ion exchange membranes Applicant." Innogy Technology Ventures Ltd, UK A process for manufacturing a cation-selective ion exchange nrembrane is the subject of this patent. It involves contacting one or both sides of a membrane (comprising a polymer having side chains which contain acid groups) with a solution that comprises one or nrore soluble salts of one or more onium ions, and a salt which will prevent swelling of the membrane, for a period of time sufficient to allow tire desired extent of substitution of the cations which are associated with the acid groups by onium ions. Patent number: W O 01/79336 Inventor: P.J. Morrissey Publication date: 25 October 2001
Water and wastewater treatment Applicant." Parkson Corp, USA A treatment system for treating water/wastewater includes two continuously operating granular media filters (GMFs) that are operated together in series. The water/wastewater to be treated is introduced as an influent into the first of the GMFs and is treated by this filter. Treated or processed water/wastewater or effluent is produced as is a first reject which contains impurities separated from a granular media bed in the first GMF and which is discharged from the first ( ; M E The effluent from the first GMF is further filtered in the second continuously operating GMF such that the effluent front the second GMF is clarified water and a second reject discharged from the second GMF contains impurities separated from a granular bed in the second G M E In order to reduce the pollutants in the first and second rejects, the first and second reject water being discharged from, respectively, the first and second continuously operated GMFs, is separately treated by gravity separation, membrane filtration, two-stage or multistage filtration or filtration or any combination of these so that cleaned water is created that meets quality standards and a sludge is created that can be disinfected and/or dewatered and processed by suitable hygienic measures. In addition, chemicals for coagulation/flocculation may be added and the liquid to be processed may be subjected to a disinfecting treatment and/or a mechanical, biological and/or chemical t'reatment.
Patent number: WO 01/79117 hwentor: H.E Larsson Publication date: 25 October 2001
Production method for bipolar membranes Applieam: Solvay (Societe Anonyme), Belgium The invention concerns a method for making a bipolar membrane. It involves treating a cationic membrane with a group 8 metal salt; treating an anionic membrane with a transition metal salt not belonging to group 8; and conjoining the two membranes, the latter being contacted, before and after being conjoined, with a treamrent solution selected among aqueous alkaline solnrions, aqueous metallic sulphate solutions and aqueous metallic sulphite solutions. Patent number." WO 01/79335 Inventors: E. Mischi, D. Mantione, A. Pastacaldi, L. Botte Publication date: 25 October 2001
Composite membrane Applicant: The Dow Chemical Co, USA A composite membrane and method for making the membrane is described. It comprises a porous support and a polyamide surface. The membrane provides improved lqux and/or rejection rates. It is further capable of operating at lower operating pressures. The method includes reacting a polyfunctional amine with a polyfunctional acyl halide to form a polyamide. The method includes the step of contacting a complcxing agent with the polyfunctional acyl halide prior to a substantial reaction between the polyfunctional acyl halide alld a polyfunctional amine. The process is easily adapted to conrmercial scale manufacturing processes and is particularly suited for making nanofiltration and reverse osmosis composite membranes. Patent number: WO 01/78882 Inventor. W.E. Mickols Publication date." 25 October 200 l
Electrolytic cell and method for electrolysis Applicant." Amuchina Spa, Italy An dectrolyric cell is provided for producing a sodiunl hypochlorite solution with active chlorine from brine. A plurality of the cells are typically employed with provision for cooling tile elcctrolyte. The cell comprises a cylindrical metallic cathode with a smaller cylindrical metallic anode disposed within the cathode to define an annular passage through which the electrolyte passes, hr preferred embodiments, the annular passage can contain particulate material such as carbon to enhance surface contact, and an anionic membrane can be provided between the anode and cathode to divide the annular passage into two chambers. Patent number: WO 01181656 /nventor: G. Ponzano Publication date: 1 November 200I
MembraneTechnologyNo. 143
Electrophoresis separation and treatment of samples Applicant: Gradipore Ltd, Australia An electrophoresis system for separating small macromolecules has been developed. It comprises two electrophoretic systems. Each system comprises an anode buffer and cathode buffer chamber containing an anode and cathode. There is an ion-permeable separation membrane placed between the anode and cathode buffer chambers, and an ion-pernreable restriction membrane positioned either side of the ion-permeable separation membrane to define first and second interstitial volumes. An electric field is applied between the buffer chambers in which the two electrophoretic systems are in fluid communication with each other. Patent number: W O 01/78877 Inventors: B.E Conlan, A.M. Gilbert, H. Nair, L.J. Ryan, D.B. Rylatt, T.M. Thonras Publication date: 25 October 2001
Plasmid recovery Applicant." Millipore Corp, USA A process for the recovery of plasmids, or other DNA from cells has been developed. It uses a first filtration step to remove the cellular debris and other large cellular components, and then an ultrafiltration step to capture the plasnfids or other DNA on the surface of the ultrafiltration membrane where they may be recovered. An apparatus is also taught for enacting the process and comprises an upper microfiltration, or coarse filtration membrane, and a lower ultrafiltration membrane. The driving force may be the same for both filters and may be done sequentially or simultaneously. Patent number." W O 01/79486 Inventor: J.T. Leonard Publication date: 25 October 2001
Electrolytic process Applicant/Inventor: R.L. Sampson, USA, A.H. Sampson,USA and E Di Mascio, USA An improved electrolytic process and apparatus are disclosed for oxidizing or reducing inorganic and organic species, especially in dilute aqueous solutions. The electrolytic reactor includes an anode, a cathode and a monobed of cation exchange material in contact with the anode (as i the primary electrode for oxidation) and anion : exchange material in contact with the cathode i (as the primary electrode for r e d u c t i o n ) . The monobed includes both modified ion i exchange materials, modified to have active:
semiconductor junctions to enhance rhe oxidation or reduction, and unmodified ion exchange materials to enhance diffusion of the ions through the monobed. The monobed may be divided into segments including one or more particulate ion exchange resin segments, and one or more ion exchange membrane segments. Patent number: WO 01/78879 Publication date: 25 October 2001
Preparation of ion exchange membranes Applicant." Innogy Technology Ventures Ltd, UK A process for manufacturing a cation-selective ion exchange nrembrane is the subject of this patent. It involves contacting one or both sides of a membrane (comprising a polymer having side chains which contain acid groups) with a solution that comprises one or nrore soluble salts of one or more onium ions, and a salt which will prevent swelling of the membrane, for a period of time sufficient to allow tire desired extent of substitution of the cations which are associated with the acid groups by onium ions. Patent number: W O 01/79336 Inventor: P.J. Morrissey Publication date: 25 October 2001
Water and wastewater treatment Applicant." Parkson Corp, USA A treatment system for treating water/wastewater includes two continuously operating granular media filters (GMFs) that are operated together in series. The water/wastewater to be treated is introduced as an influent into the first of the GMFs and is treated by this filter. Treated or processed water/wastewater or effluent is produced as is a first reject which contains impurities separated from a granular media bed in the first GMF and which is discharged from the first ( ; M E The effluent from the first GMF is further filtered in the second continuously operating GMF such that the effluent front the second GMF is clarified water and a second reject discharged from the second GMF contains impurities separated from a granular bed in the second G M E In order to reduce the pollutants in the first and second rejects, the first and second reject water being discharged from, respectively, the first and second continuously operated GMFs, is separately treated by gravity separation, membrane filtration, two-stage or multistage filtration or filtration or any combination of these so that cleaned water is created that meets quality standards and a sludge is created that can be disinfected and/or dewatered and processed by suitable hygienic measures. In addition, chemicals for coagulation/flocculation may be added and the liquid to be processed may be subjected to a disinfecting treatment and/or a mechanical, biological and/or chemical t'reatment.
Patent number: WO 01/79117 hwentor: H.E Larsson Publication date: 25 October 2001
Production method for bipolar membranes Applieam: Solvay (Societe Anonyme), Belgium The invention concerns a method for making a bipolar membrane. It involves treating a cationic membrane with a group 8 metal salt; treating an anionic membrane with a transition metal salt not belonging to group 8; and conjoining the two membranes, the latter being contacted, before and after being conjoined, with a treamrent solution selected among aqueous alkaline solnrions, aqueous metallic sulphate solutions and aqueous metallic sulphite solutions. Patent number." WO 01/79335 Inventors: E. Mischi, D. Mantione, A. Pastacaldi, L. Botte Publication date: 25 October 2001
Composite membrane Applicant: The Dow Chemical Co, USA A composite membrane and method for making the membrane is described. It comprises a porous support and a polyamide surface. The membrane provides improved lqux and/or rejection rates. It is further capable of operating at lower operating pressures. The method includes reacting a polyfunctional amine with a polyfunctional acyl halide to form a polyamide. The method includes the step of contacting a complcxing agent with the polyfunctional acyl halide prior to a substantial reaction between the polyfunctional acyl halide alld a polyfunctional amine. The process is easily adapted to conrmercial scale manufacturing processes and is particularly suited for making nanofiltration and reverse osmosis composite membranes. Patent number: WO 01/78882 Inventor. W.E. Mickols Publication date." 25 October 200 l
Electrolytic cell and method for electrolysis Applicant." Amuchina Spa, Italy An dectrolyric cell is provided for producing a sodiunl hypochlorite solution with active chlorine from brine. A plurality of the cells are typically employed with provision for cooling tile elcctrolyte. The cell comprises a cylindrical metallic cathode with a smaller cylindrical metallic anode disposed within the cathode to define an annular passage through which the electrolyte passes, hr preferred embodiments, the annular passage can contain particulate material such as carbon to enhance surface contact, and an anionic membrane can be provided between the anode and cathode to divide the annular passage into two chambers. Patent number: WO 01181656 /nventor: G. Ponzano Publication date: 1 November 200I
MembraneTechnologyNo. 143