Treated With Nitrogen-containing Material Patents (Class 521/32)
-
Publication number: 20020032245Abstract: A rapid release resinate composition wherein the active substance is anisotropically distributed throughout the resin material.Type: ApplicationFiled: June 20, 2001Publication date: March 14, 2002Inventor: Lyn Hughes
-
Publication number: 20020015687Abstract: An environmentally friendly method of loading nicotine onto cation exchange resins under anhydrous conditions is described. The method eliminates many of the processing problems that are associated with loading in aqueous media.Type: ApplicationFiled: June 20, 2001Publication date: February 7, 2002Inventors: Simon Andrew Bellamy, Lyn Hughes
-
Publication number: 20020002207Abstract: There is described a group of underquarternized anion exchange resins having the ability to bind with and remove from one environment to another a significant fraction of scavenged molecules by forming covalent bonds with the molecules. The method of using such underquarternized resins is also described.Type: ApplicationFiled: January 26, 2001Publication date: January 3, 2002Inventor: Steven L. Regen
-
Patent number: 6329435Abstract: The present invention relates to a process for preparing novel, monodisperse crosslinked bead polymers having thiourea groups and their use for adsorbing metal compounds, in particular heavy metal compounds or noble metal compounds.Type: GrantFiled: August 21, 2000Date of Patent: December 11, 2001Assignee: Bayer AktiengesellschaftInventors: Reinhold Klipper, Werner Strüver, Ulrich Schnegg, Heiko Hoffmann, Dieter Mauer, Bernhard Lehmann, Bruno Hees, Holger Lütjens
-
Patent number: 6306488Abstract: A composite porous structure includes a macroporous open-pore sponge of regenerated cellulose having disposed within the pores a microporous polyvinyl chloride (PVC) substrate. The total empty space of the structure, produced by the pores, is between 60% and 92% of the outer envelope geometrical volume of the structure. The wet compressive strength of the structure is at least ten times greater than the wet compressive strength of the cellulose sponge without the PVC.Type: GrantFiled: March 17, 2000Date of Patent: October 23, 2001Inventor: Norman B. Rainer
-
Patent number: 6303702Abstract: Disclosed is a method for producing material for purification of physiological liquids of organism. A material has a size, shape and structure selected so as to remove toxic compounds in the molecular range of 300 to 3000 Dalton, and the material is produced from a porous hydrophobic divinylbenzne copolymer, which initially has surface exposed vinyl groups, in which thereafter the vinyl groups are chemically modified so as to form different surface exposed functional groups with a greater hydrophilicity and greater biocompatibility than those of the vinyl groups.Type: GrantFiled: December 13, 1999Date of Patent: October 16, 2001Assignee: Renal Tech International LLCInventors: Vadim Davankov, Maria Tsyurupa, Ludmia Pavlova
-
Patent number: 6248798Abstract: Anion-exchange compositions are provided comprising anion-exchange functional groups comprising at least a first and a second nitrogen group, wherein the first nitrogen group is a quaternary amine and the second nitrogen group is selected from the group consisting of primary, secondary, tertiary or quaternary amines. Methods of making and using the compositions are also provided.Type: GrantFiled: November 23, 1998Date of Patent: June 19, 2001Assignee: Dionex CorporationInventors: Rosanne W. Slingsby, Christopher A. Pohl, Jacek J. Jagodzinski, Latha P. Narayanan, Michael Weitzhandler
-
Patent number: 6221923Abstract: The present invention pertains to a process for the cross-linking of modified engineering thermoplastics, in particular, of polymeric sulfinic acids or sulfinic acid salts. In particular, the invention pertains to a process for the preparation of cross-linked polymers, characterized in that solutions of polymeric sulfinic acids or sulfinic acid salts (—SO2Me), optionally in the presence of organic di- or oligohalogeno compounds [R(Hal)x], are freed from solvent and cross-linked to polymers, wherein Me stands for a monovalent or polyvalent metal cation; R stands for an optionally substituted alkyl or aryl residue containing from 1 to 20 carbon atoms; and Hal stands for F, Cl, Br or I.Type: GrantFiled: June 4, 1997Date of Patent: April 24, 2001Inventors: Werner Schnurnberger, Jochen Kerres, Wei Cui
-
Patent number: 6156810Abstract: A solid nucleophilic reagent for the conversion of benzylic halogen functionality on polymers to other functionalities, and methods of making and using the same.Type: GrantFiled: July 21, 1997Date of Patent: December 5, 2000Assignee: Exxon Chemical Patents, Inc.Inventors: Chia S. Chee, Hsien-Chang Wang, Kenneth William Powers
-
Patent number: 6143849Abstract: Multifunctional chelating groups are covalently bound to acrylate or methylate monomers. These monomers are polymerized. The resulting polymers are highly substituted with chelating groups and are useful for removing metals from fluids such as liquid hydrocarbons. An example of a polymer according to this invention has the following structure: ##STR1## wherein Q is a saturated or unsaturated aliphatic group having 1 to about 200 carbon atoms and is typically an unsubstituted unbranched alkylene, a substituted unbranched alkylene, a substituted branched alkylene, or an unsubstituted branched alkylene, and is an integer having a value of at least 1.Type: GrantFiled: November 27, 1996Date of Patent: November 7, 2000Assignee: The United States of America as represented by the Secretary of the NavyInventors: Dhananjay B. Puranik, Eddie L. Chang
-
Patent number: 6140543Abstract: A process for the production of 1,3-propanediol by hydrating acrolein in the presence of an ion exchanger to form 3-hydroxypropionaldehyde includes reacting acrolein and water in a ratio by weight of 1:2 to 1:20 at 30.degree. to 120.degree. C. and a pressure in the range from 1 to 20 bar, in the presence of an ion exchange hydration catalyst. The ion exchanger and any unreacted acrolein are separated from the reaction mixture. The 3-hydroxypropionaldehyde is then catalytically hydrogenated in a liquid or gas phase using hydrogenation catalysts. The ion exchanger hydration catalyst includes polyamine/polycarboxylic acid resins produced by reacting polyamine resins based on a crosslinked polyacrylamide matrix with acrylic acid, acrylic acid derivatives or a salt of an .omega.-haloalkanoic acid. An ion exchanger includes reaction product of reacting a polyamine resin based on a crosslinked polyacrylamide matrix with acrylic acid, acrylic acid derivatives or .omega.-haloalkanoic acid salts.Type: GrantFiled: January 30, 1998Date of Patent: October 31, 2000Assignee: E. I. du Pont de Nemours and CompanyInventors: Christoph Brossmer, Dietrich Arntz
-
Patent number: 6136424Abstract: A method of purification of physiological liquids of organism has the step of passing a physiological liquid through a material which has a size, a shape, and a structure selected so as to remove toxic compounds from the physiological liquid and is composed of a partially chloromethylated porous highly crosslinked styrene or divinylbenzene copolymerwhich initially have surface exposed chloromethyl groups in which thereafter chlorine is replaced with an element which forms different surface exposed functional groups with a greater hydrophilicity and greater biocompatibility than that of the chloromethyl group.Type: GrantFiled: February 6, 1998Date of Patent: October 24, 2000Assignee: Renal Tech International, LLCInventors: Vadim Davankov, Maria Tsyurupa, Ludmila Pavlova, Dzidra Tur
-
Patent number: 6059975Abstract: Disclosed herein are a class of anion exchange resins containing two different exchange sites with improved selectivity and sorptive capability for chemical species in solution, such as heptavalent technetium (as pertechnetate anion, TcO.sub.4.sup.-). The resins are prepared by first reacting haloalkylated crosslinked copolymer beads with a large tertiary amine in a solvent in which the resin beads can swell, followed by reaction with a second, smaller, tertiary amine to more fully complete the functionalization of the resin. The resins have enhanced selectivity, capacity, and exchange kinetics.Type: GrantFiled: September 2, 1997Date of Patent: May 9, 2000Assignee: Lockheed Martin Energy Research CorporationInventors: Spiro D. Alexandratos, Gilbert M. Brown, Peter V. Bonnesen, Bruce A. Moyer
-
Patent number: 6028120Abstract: A process for producing a deionizing resin, which comprises reacting an organic compound having at least one reactive hydroxy group and at least one active chelating site with an organic polymer matrix having at least one reactive --OH or --NH.sub.2 group, and thereby producing a chelated.sub.-- polymer complex, as shown in FIG. II or FIG. IV: ##STR1## Washing the polymer complex with water, followed by washing with a mineral acid solution and then again washing with water and thereby reducing the level of sodium, iron and chromium ions in the polymer complex to less than 100 ppb each.Type: GrantFiled: December 15, 1997Date of Patent: February 22, 2000Assignee: Clariant Finance (BVI) LimitedInventors: M. Dalil Rahman, John Saukaitis, Robert E. Potvin, Mohammad Khadim
-
Patent number: 6020385Abstract: Polymers of improved surface quality are obtained by polymerization of microencapsulated monomer droplets suspended in an aqueous phase if the monomer and/or the aqueous phase contain a polymerization inhibitor.Type: GrantFiled: November 12, 1997Date of Patent: February 1, 2000Assignee: Bayer AktiengesellschaftInventors: Olaf Halle, Wolfgang Podszun, Robert Bloodworth, Werner Struver, Axel Ingendoh
-
Patent number: 6017969Abstract: An ion-exchange resin stabilized against shrinkage, the resin being loaded with at least one amphiphilic ion in the absence of sodium cations.Also a process for removing iodide compounds from a liquid carboxylic acid and/or carboxylic acid anhydride obtained from the Group VIII noble metal catalysed, alkyl iodide co-catalysed carbonylation of alcohols and/or their reactive derivatives by contacting the liquid carboxylic acid and/or carboxylic acid anhydride with the ion-exchange resin stabilized against shrinkage as aforesaid, the ion-exchange resin being loaded with one or more of the metals silver, palladium or mercury.Type: GrantFiled: May 20, 1998Date of Patent: January 25, 2000Assignee: BP Chemicals LimitedInventors: Michael David Jones, Matthew David Lunn, Andrew David Poole, Adele Shenton
-
Patent number: 6011074Abstract: Novel organic ion-exchange polymers and membranes formed from these polymers provide improved performance in electrolytic cells. The membranes exhibit an expanded micro-structure as the result of the removal of organic groups previously reacted with the ion-exchange groups of the polymer. The polymers are also useful in finely divided form as catalysts or deposited on a catalyst support. When formed into sheets, the polymers are useful as membranes in the separation of miscible liquids and in the separation of gases.Type: GrantFiled: February 2, 1998Date of Patent: January 4, 2000Assignee: The Dow Chemical CompanyInventors: Marius W. Sorenson, Robert A. Cipriano, Jose J. Longoria, John D. Weaver
-
Patent number: 5985942Abstract: A composite membrane is provided in which a porous substrate is impregnated with a polymeric composition comprising various combinations of .alpha.,.beta.,.beta.-trifluorostyrene, substituted .alpha.,.beta.,.beta.-trifluorostyrene and ethylene-based monomeric units. Where the polymeric composition includes ion-exchange moieties, the resultant composite membranes are useful in electrochemical applications, particularly as membrane electrolytes in electrochemical fuel cells.Type: GrantFiled: November 5, 1998Date of Patent: November 16, 1999Assignee: Ballard Power Systems Inc.Inventors: Alfred E. Steck, Charles Stone
-
Patent number: 5980987Abstract: A method for removing, separating, and concentrating certain selected ions from a source solution that may contain larger concentrations of other ions comprises bringing the source solution in contact with a composition comprising an ion-binding ligand covalently bonded to a membrane having hydrophilic surface properties. The ligand portion of the composition has affinity for and forms a complex with the selected ions, thereby removing them from the source solution. The selected ions are then removed from the composition through contact with a much smaller volume of a receiving solution in which the selected ions are either soluble or which has greater affinity for the selected ions than does the ligand portion of the composition, thereby quantitatively stripping the complexed ions from the ligand and recovering them in concentrated form in the receiving solution. The concentrated ions thus removed may be further separated and recovered by known methods.Type: GrantFiled: November 7, 1996Date of Patent: November 9, 1999Assignees: Millipore Corporation, IBC Advanced Technologies, Inc.Inventors: Bryon J. Tarbet, Ronald L. Bruening, Anthony J. Di Leo, Philip M. Goddard, Louis M. Scarmoutzos
-
Patent number: 5973080Abstract: The process includes the reaction of a chloro-formamidinium chloride with a polystyrene-divinylbenzene resin functionalized with primary amine groups. The resins which can be obtained according to this process may in particular have a spacer arm of general formula (IV): ##STR1## with X representing oxygen or sulphur and m being equal to 1 or 2. This spacer arm bears at its end, on the right, a primary amine group or a guanidine group.Type: GrantFiled: January 27, 1998Date of Patent: October 26, 1999Assignee: Elf Aquitaine ProductionInventors: Pierre Le Perchec, Marie Abiuso, Emmanuel Arretz
-
Patent number: 5936003Abstract: In accordance with the present invention, an improved anion-exchange chromatographic composition has been formed which comprises synthetic resin support particles and anion exchange compounds attached thereto, wherein the anion-exchange compounds comprise an internal reactive group, which may be an ester, ketone or amide group, and a terminal quaternary ammonium salt which functions as an anion-exchange site. The compositions of the present invention exhibit improved hydrolytic stability as compared to other known anion-exchange chromatographic compositions due to the presence of linkers which increase the number of atoms separating the internal reactive group from the nitrogen atom of the terminal ammonium anion-exchange site. Formed articles and methods employing the anion-exchange chromatographic composition are also provided.Type: GrantFiled: March 3, 1997Date of Patent: August 10, 1999Assignee: Dionex CorporationInventors: Christopher Pohl, Charanijit Saini, Jacek Jagodzinski
-
Patent number: 5936004Abstract: Anion-exchanging molded bodies and a method of manufacturing the same. The aim is to find anion-exchangers which can be produced in any shape simply, cheaply and reproducibly, without the use of carcinogenic chloromethyl ethers. It has been established that halogenated polyethers, preferably epichlorhydrin polymers, can be treated with tertiary amines together with inert polymers to produce such anion-exchanging molded bodies by a phase-inversion process or evaporation of the solvent. These molded bodies can be in the form of blocks, balls or films.Type: GrantFiled: August 14, 1997Date of Patent: August 10, 1999Inventor: Patrick Altmeier
-
Patent number: 5919832Abstract: An amine polymer includes first and second substituents bound to amines of the polymer. The first substituent includes a hydrophobic moiety. The second substituent includes a quaternary amine-containing moiety. A method for binding bile salts of bile acids in a mammal includes orally administering to the mammal a therapeutically-effective amount of the amine polymer.Type: GrantFiled: January 7, 1997Date of Patent: July 6, 1999Assignee: Geltex Pharmaceuticals Inc.Inventors: W. Harry Mandeville, III, Stephen Randall Holmes-Farley
-
Patent number: 5883212Abstract: An electrically conductive polymeric material useful in electrographic imaging elements is disclosed. The material comprises, in polymerized form: (1) a polymerizable, conductivity exalting comonomer selected from the group consisting of interpolymerizable acids with an acid number between 100 and 900, hydroxyalkyl esters of acrylic or methacrylic acid, cyanoalkyl esters of acrylic or methacrylic acid, and combinations thereof; (2) a polymerizable, ethylenically unsaturated ammonium precursor; and, optionally, (3) other polymerizable precursors. A layer of the material has an apparent surface resistivity of 1.times.10.sup.4 to 1.times.10.sup.7 .OMEGA./.quadrature..Type: GrantFiled: May 8, 1996Date of Patent: March 16, 1999Assignee: Rexam Graphics, Inc.Inventor: Everett Wyman Bennett
-
Patent number: 5863956Abstract: Mesomorphic complexes which comprise anionic polyelectrolytes, cationic polyelectrolytes and/or polyampholytes and cationic, anionic, nonionic and/or amphoteric surfactants.Type: GrantFiled: February 12, 1997Date of Patent: January 26, 1999Assignee: BASF AktiengesellschaftInventors: Axel Kistenmacher, Markus Antonietti, Juergen Conrad
-
Patent number: 5834523Abstract: A composite membrane is provided in which a porous substrate is impregnated with a polymeric composition comprising various combinations of .alpha.,.beta.,.beta.-trifluorostyrene, substituted .alpha.,.beta.,.beta.-trifluorostyrene and ethylene-based monomeric units. Where the polymeric composition includes ion-exchange moieties, the resultant composite membranes are useful in electrochemical applications, particularly as membrane electrolytes in electrochemical fuel cells.Type: GrantFiled: January 5, 1996Date of Patent: November 10, 1998Assignee: Ballard Power Systems, Inc.Inventors: Alfred E. Steck, Charles Stone
-
Patent number: 5814672Abstract: A strongly basic anion exchange resin of gel type having trimethylamine type quaternary ammonium groups and a cross-linked three dimensional polymer structure formed by copolymerization of a monovinyl aromatic monomer with a cross-linkable aromatic monomer, wherein the water content X (wt %) of the resin with counter ions being a standard type (chlorine type) and the salt-splitting capacity Y (meq/g-Resin) are in a relation represented by the following formula (1) or (2):Y.gtoreq.0.0214X+3.26 (1)provided 50<X.ltoreq.75Y.gtoreq.0.0722X+0.711 (2)provided 40.ltoreq.X.ltoreq.50.Type: GrantFiled: November 28, 1995Date of Patent: September 29, 1998Assignee: Mitsubishi Chemical CorporationInventors: Atsuo Kiyokawa, Ryuichi Sugimoto
-
Patent number: 5804606Abstract: The present invention is concerned with improved chelating resins. More particularly, the present invention is concerned with macroporous, aminoalkylphosphonic or iminodiacetic acid chelating resins having improved stability and capacity in the removal of cations (e.g. calcium, magnesium, barium and strontium) from brines and in the removal of metals (e.g. nickel, copper and zinc) from waste streams.Type: GrantFiled: April 21, 1997Date of Patent: September 8, 1998Assignee: Rohm & Haas CompanyInventors: Joanna Surowiec, Jaques Franc, Jeannot Lucien Hawecker
-
Patent number: 5773384Abstract: A sorbent for removing toxicants from blood or plasma includes a plurality of beads composed of hyper-crosslinked polystyrene-type resin and having a surface which is modified so as to prevent adsorption of large proteins and platelets and to minimize activation of blood complement system without affecting noticeably accessibility of an inner adsorption space of the beads for small and middle-sized toxicant molecules.Type: GrantFiled: November 25, 1996Date of Patent: June 30, 1998Assignee: White Eagle International Technologies Group, Inc.Inventors: Vadim A. Davankov, Maria P. Tsyurupa, Ludmila A. Pavlova, Dzidra R. Tur
-
Patent number: 5773480Abstract: Polymeric compositions are derived from copolymers of .alpha.,.beta.,.beta.-trifluorostyrene with a variety of substituted .alpha.,.beta.,.beta.-trifluorostyrenes. These compositions are suitable for use as membranes, particularly as ion-exchange membranes, and most particularly as solid polymer electrolytes in electrochemical applications, such as, for example, electrochemical fuel cells.Type: GrantFiled: December 18, 1996Date of Patent: June 30, 1998Assignee: Ballard Power Systems Inc.Inventors: Charles Stone, Alfred E. Steck, Jinzhu Wei
-
Patent number: 5770631Abstract: A process is disclosed for the production of connected microgel particles. According to the process, starting microgel particles having particle sizes of 100-0.01 .mu.m and a particle size distribution whose standard deviation is not greater than 100% of a mean particle size of the starting microgel particles are dispersed in a matrix component. The starting microgel particles are soaked with a monomer. The monomer is then polymerized, whereby the starting microgels are connected together. Also disclosed is an article comprising a base material and a layer of such connected microgel particles formed on a surface of the base material.Type: GrantFiled: August 31, 1995Date of Patent: June 23, 1998Assignee: Dainichiseika Color & Chemicals Mfg. Co., Ltd.Inventors: Takashi Fukutomi, Yoshifumi Sugito, Minoru Takizawa, Satoshi Mizoguchi, Michiei Nakamura, Hitoshi Takeuchi, Naomi Oguma, Motohisa Maruyama, Shojiro Horiguchi
-
Patent number: 5747546Abstract: Novel organic ion-exchange polymers and membranes formed from these polymers provide improved performance in electrolytic cells. The membranes exhibit an expanded micro-structure as the result of the removal of organic groups previously reacted with the ion-exchange groups of the polymer. The polymers are also useful in finely divided form as catalysts or deposited on a catalyst support. When formed into sheets, the polymers are useful as membranes in the separation of miscible liquids and in the separation of gases.Type: GrantFiled: December 31, 1996Date of Patent: May 5, 1998Assignee: The Dow Chemical CompanyInventors: Marius W. Sorenson, Robert A. Cipriano, Jose J. Longoria, John D. Weaver
-
Patent number: 5743940Abstract: A process for producing a fabric absorbent that is capable of efficient removal of odorous substances, in particular malodorous substances. The absorbent is obtained by exposing an organic high-molecular weight compound, such as polyolefinic polymers or halogenated polyolefinic polymers, to an ionizing radiation and thereafter graft polymerizing the high-molecular weight compound with a polymerizable monomer that contains ion-exchange groups and/or a polymerizable monomer that can be converted to ion-exchange groups so as to incorporate the ion-exchange groups in the high-molecular weight compound.Type: GrantFiled: June 23, 1994Date of Patent: April 28, 1998Assignees: Japan Atomic Energy Research Institute, Ebara CorporationInventors: Takanobu Sugo, Jiro Okamoto, Kunio Fujiwara, Hideaki Sekiguchi, Toshiaki Fujii
-
Patent number: 5726253Abstract: The process includes the reaction of a chloroformamidinium chloride with a polystyrene-divinylbenzene resin functionalized with primary amine groups. The resins which can be obtained according to this process may in particular have a spacer arm of general formula (IV):--CH.sub.2 (--X--CH.sub.2 --CH.sub.2 --(.sub.m -- (IV)with X representing oxygen or sulphur and m being equal to 1 or 2. This spacer arm bears at its end, on the right, a primary amine group or a guanidine group.Type: GrantFiled: December 11, 1996Date of Patent: March 10, 1998Assignee: Elf Aquitaine ProductionInventors: Pierre Le Perchec, Marie Abiuso, Emmanuel Arretz
-
Patent number: 5726210Abstract: A process for the preparation of an anion exchange resin is described, which comprises reacting an aromatic crosslinked haloalkyl-containing copolymer with an amine in the presence of at least 100 parts by weight, per 100 parts by weight of the copolymer, of water and at least 5 parts by weight, per 100 parts by weight of water, of a water-soluble inorganic salt. A process for the preparation of an anion exchange resin is also described, which comprises acting a haloalkylating agent on an aromatic crosslinked copolymer, separating an unreacted portion of the haloalkylating agent from the aromatic crosslinked haloalkyl-containing copolymer so obtained, and reacting the resulting haloalkyl-containing copolymer with an amine in the presence of at least 100 parts by weight, per 100 parts by weight of the copolymer, of water and at least 5 parts by weight, per 100 parts by weight of water, of a water-soluble inorganic salt.Type: GrantFiled: October 31, 1996Date of Patent: March 10, 1998Assignee: Mitsubishi Chemical CorporationInventors: Takeshi Teraue, Youichi Tamura
-
Patent number: 5712347Abstract: An ion exchange resin is disclosed that is comprised of an insoluble copolymer onto which are grafted pendent groups that provide 1.0 to about 10 mmol/g dry weight phosphorous. The pendent groups have the formula ##STR1## wherein R is hydrogen, a cation or mixtures thereof; and R.sup.1 is hydrogen or an C.sub.1 -C.sub.2 alkyl group. The resin also contains zero to about 5 mmol/g dry weight of pendent aromatic sulfonate groups. Processes for making and using an ion exchange-resin are also disclosed.Type: GrantFiled: April 3, 1997Date of Patent: January 27, 1998Assignees: ARCH Development Corp., University of Tennessee Research Corp.Inventors: Andrzej W. Trochimcznk, Ralph C. Gatrone, Spiro Alexandratos, E. Philip Horwitz
-
Patent number: 5705534Abstract: A method of preparing a modified cation exchange membrane in which a sulfide of silver, tungsten, molybdenum or a mixture thereof is deposited within the polymer matrix, which method comprises the steps of:i) forming within the polymer matrix of the membrane a complex of silver, tungsten, molybdenum or a mixture thereof with a water soluble compound containing an --SH group; andii) converting the complex formed in step (i) into the insoluble sulfide of silver, tungsten, molybdenum or a mixture thereof.Type: GrantFiled: June 4, 1996Date of Patent: January 6, 1998Assignee: National Power plcInventors: Vincent F. D'Agostino, Graham Edward Cooley, John Michael Newton, Karel Bouchal
-
Patent number: 5698600Abstract: The invention relates to the synthesis of bisphenols from monophenols and carbonyl compounds such as aldehydes and ketones with concentrated mineral acids such as hydrochloric acid and/or hydrogen chloride gas as acid catalysts and a mercaptan as cocatalyst, which is fixed by an ion-pair bond to a matrix insoluble in the reaction medium.Type: GrantFiled: October 15, 1996Date of Patent: December 16, 1997Assignee: Bayer AGInventors: Claus Wulff, Gerhard Fennhoff, Alfred Eitel
-
Patent number: 5679281Abstract: Gelled material compositions for use as adsorbents and ion exchangers. The composition including a specific extractant, an organic solvent and a halopolymer modified by substitution with a radical of a substance compatible with the specific extractant. Optionally the composition may be in form of beads.Type: GrantFiled: March 21, 1994Date of Patent: October 21, 1997Assignees: Yeda Research and Development Co. Ltd., The Weizmann Institute of ScienceInventors: Gideon Levin, Lev Bromberg
-
Patent number: 5670550Abstract: Anion exchange resins including at least two positively charged sites and a ell-defined spacing between the positive sites are provided together with a process of removing anions or anionic metal complexes from aqueous solutions by use of such resins. The resins can be substituted poly(vinylpyridine) and substituted polystyrene.Type: GrantFiled: June 7, 1995Date of Patent: September 23, 1997Assignee: The Regents of the University of California Office of Technology TransferInventors: Gordon D. Jarvinen, S. Fredric Marsh, Richard A. Bartsch
-
Patent number: 5648400Abstract: A monomer having cationic groups and a monomer having anionic groups are introduced into polymeric substrates such as fibers, woven fabrics, nonwoven fabrics and membranous materials through radiation-initiated graft polymerization, thereby producing polymeric electrolyte complexes that have good physical properties and which can be formed into shapes that suit specific uses. Also disclosed is a process according to which hydrophilic groups and/or ion-exchange groups are introduced into polymeric substrates such as fibers, woven fabrics, nonwoven fabrics and membranous materials through radiation-initiated graft polymerization. To introduce hydrophilic groups and/or ion-exchange groups, two or more monomers are used as selected from among hydrophilic monomers, monomers having cation-exchange groups (e.g. acrylic acid, methacrylic acid and styrenesulfonic acid salt), and monomers having anion-exchange groups (e.g. vinylbenzyltrimethyl ammonium salt and diethylaminoethyl methacrylate).Type: GrantFiled: June 16, 1995Date of Patent: July 15, 1997Assignees: Japan Atomic Energy Research Inst., Nikki Chemical Co., Ltd.Inventors: Takanobu Sugo, Satoshi Tanaka, Tsuyoshi Tsutsui
-
Patent number: 5637627Abstract: A method for producing a spherical crosslinked copolymer, which comprises polymerizing a monofunctional addition-polymerizable monomer and at least 0.5% by weight of a polyfunctional addition-polymerizable monomer on the basis of the total weight of monomers by suspension polymerization in an aqueous medium in the presence of a radical polymerization initiator of the following formula (b) which has a decomposition temperature for a half-life period of 10 hours within a range of from 60.degree. to 120.degree. C. and which is capable of forming at least four radical initiating points per molecule by the decomposition:(R.sub.4 --O--O.paren close-st..sub.m R.sub.5 (b)wherein R.sub.4 is a linear or branched C.sub.1-10 alkyl group, R.sub.5 is a m-valent C.sub.4-25 hydrocarbon group, and m is an integer of at least 2, wherein the plurality of R.sub.4 per molecule may be the same or different.Type: GrantFiled: February 20, 1996Date of Patent: June 10, 1997Assignee: Mitsubishi Chemical CorporationInventors: Junya Watanabe, Tsunehiko Kurata
-
Patent number: 5622996Abstract: The present invention concerns the synthesis of several biomimetically important polymer-supported, sulfonated catechol (PS-CATS), sulfonated bis-catechol linear amide (PS-2-6-LICAMS) and sulfonated 3,3-linear tris-catechol amide (PS-3,3-LICAMS) ligands, which chemically bond to modified 6% crosslinked macroporous polystyrene-divinylbenzene beads (PS-DVB). These polymers are useful for the for selective removal and recovery of environmentally and economically important metal ions from aqueous solution, as a function of pH. The Fe.sup.3+ ion selectivity shown for PS-CATS, PS-2-6-LICAMS, and PS-3,3-LICAMS polymer beads in competition with a similar concentration of Cu.sup.2+, Zn.sup.2+, Mn.sup.2+, Ni.sup.2+,Mg.sup.2+, Al.sup.3+, and Cr.sup.3+ ions at pH 1-3. Further, the metal ion selectivity is changed at higher pH values in the absence of Fe.sup.3+ (for example, Hg.sup.2+ at pH 3). The rates of selective removal and recovery of the trivalent metal ions, e.g. Fe.sup.3+ Al.sup.3+ ion etc.Type: GrantFiled: February 17, 1995Date of Patent: April 22, 1997Assignee: Regents of the University of CaliforniaInventor: Richard H. Fish
-
Patent number: 5622997Abstract: A moulded ion exchange resin structure suitable for use in reactive distillation is prepared by compressing particles of an ion exchange resin precursor having chemically reactive functional groups on their surfaces, into a preform having a predetermined shape, subsequently chemically bonding the particles together by reaction of the functional groups for example by acid-catalysed condensation and converting the precursor to an ion exchange resin, for example by sulphonation.Type: GrantFiled: June 6, 1995Date of Patent: April 22, 1997Assignees: BP Chemicals Limited, The British Petroleum Co., p.l.c.Inventors: Stephen R. Tennison, Richard H. Weatherhead
-
Patent number: 5618851Abstract: An ion exchange resin is disclosed that is comprised of an insoluble copolymer onto which are grafted pendent groups that provide 1.0 to about 10 mmol/g dry weight phosphorous. The pendent groups have the formula ##STR1## wherein R is hydrogen, a cation or mixtures thereof; andR.sup.1 is hydrogen or an C.sub.1 -C.sub.2 alkyl group. The resin also contains zero to about 5 mmol/g dry weight of pendent aromatic sulfonate groups. Processes for making and using an ion exchange resin are also disclosed.Type: GrantFiled: February 6, 1995Date of Patent: April 8, 1997Assignees: Arch Development Corp., The University of Tennessee Research Corp.Inventors: Andrzej W. Trochimcznk, Ralph C. Gatrone, Spiro Alexandratos, E. Philip Horwitz
-
Patent number: 5612383Abstract: Weakly basic anion exchangers of the poly(meth)acrylamide type which have been prepared by aminolysis of poly(meth)acrylonitrile or poly(meth)acrylate with polyamines of defined composition have an improved absorption capacity for sulphate ions and are suitable for selectively removing sulphate ions from aqueous liquids, in particular from sodium chloride brine and from waste waters.Type: GrantFiled: May 18, 1995Date of Patent: March 18, 1997Assignee: Bayer AktiengesellschaftInventors: Harold Heller, Franz-Rudolf Minz, Reinhold M. Klipper, Alfred Mitschker, Heiko Hoffmann
-
Patent number: 5602185Abstract: Sulfonyl fluoride substituted .alpha.,.beta.,.beta.-trifluorostyrene monomers are disclosed. The monomers are incorporated into polymeric compositions which are conveniently hydrolyzed to produce polymeric compositions which include ion-exchange moieties. The resulting compositions which include ion-exchange moieties are particularly suitable for use as solid polymer electrolytes in electrochemical applications, such as, for example, electrochemical fuel cells.Type: GrantFiled: June 6, 1995Date of Patent: February 11, 1997Assignee: Ballard Power Systems Inc.Inventors: Charles Stone, Alfred E. Steck, Robert D. Lousenberg
-
Insoluble, only slightly swellable polymers containing amino groups, their preparation and their use
Patent number: 5599898Abstract: Abstract of the Disclosure: Insoluble, only slightly swellable polymers containing amino groups, which can be obtained from popcorn polymers containing units of the structure ##STR1## where R and R.sup.1 are H or C.sub.1 -C.sub.4 -alkyl, by eliminating the group R--CO-- from at least 2% of the incorporated units of the structure I, with the formation of units of the structure II ##STR2## a process for the preparation of the amino-containing popcorn polymers by polymerizing N-vinylcarboxamides and, if desired, other monoethylenically unsaturated monomers copolymerizable therewith with from 0.Type: GrantFiled: April 25, 1995Date of Patent: February 4, 1997Assignee: BASF AktiengesellschaftInventors: Heinrich Hartmann, Walter Denzinger, Michael Kroener, Claudia Nilz -
Patent number: 5597850Abstract: An open-celled cellulosic sponge contains a thermally insolubilized polyethyleneimine (PEI) capable of selectively removing dissolved ions from aqueous systems. By virtue of a cuboid configuration of critically selected dimensions, the insolubilized PEI is substantially uniformly distributed in useful amounts throughout the sponge.Type: GrantFiled: July 31, 1990Date of Patent: January 28, 1997Inventor: Norman B. Rainer
-
Patent number: 5595652Abstract: Undesirable ionic species are removed from water by way of a passive treatment employing apparatus in the form of a porous container which confines a multitude of pieces of sponge containing a chelation polymer. The container, preferably of tubular shape and having a draw-string closure, is emplaced into a region through which water to be treated is caused to flow. The manner of emplacement is such as to prevent by-pass of water around the container. After a suitable time interval, the apparatus is removed and replaced with similar apparatus having fresh sponge.Type: GrantFiled: September 19, 1994Date of Patent: January 21, 1997Inventor: Norman B. Rainer