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| Number | Title | Issue Date |
| 8101084 | Perchlorate ion trapping agent The invention provides a heterocycle-substituted aromatic compound represented by the following Formula (I). In Formula (I), one of R2, R3, and R4 is Ry at a meta- or para-position with respect to Rx, R1 | 01/24/2012 |
| 8066883 | Removing aluminum from solution using chelating compounds and immobilized tethered chelators Methods are described for removing aluminum from a solution using novel di- and tripodal compounds as chelators. ... | 11/29/2011 |
| 7708892 | Conditioning of ion exchangers for adsorption of oxoanions The present invention relates to the use of inorganic salts for increasing the adsorption of oxoanions and/or thioanalogues thereof to metal-doped ion exchangers, preferably to iron oxide/iron oxyhydroxide-containing ion exchangers, preferably from water or aqueous ... | 05/04/2010 |
| 7510659 | Surface-modified zeolite and process for synthesis thereof for sequestration of anions Present invention deals with cost-effective surface-modified zeolite materials developed from commercial zeolites and flyash-based zeolites by treating with surface modifiers like hexadecyltrimethyl ammonium bromide (HDTMA-Br). The formation of zeolitic materials wi... | 03/31/2009 |
| 7425270 | Method for extracting perchlorate-ion from an aqueous solution The invention relates to chemical industry and can be used for extracting perchlorate-ion from a highly concentrated processing solution having a complex nitrate-chloride-sulphate-iodate composition. The inventive method for extracting perchlorate-ion from an aqueou... | 09/16/2008 |
| 7419601 | Nanomesh article and method of using the same for purifying fluids Disclosed herein are articles for removing contaminants from a fluid, such as a liquid or gas, the article comprising carbon nanotubes, which comprise at least one molecule or cluster attached thereto or located therein, wherein the carbon nanotubes are present in t... | 09/02/2008 |
| 7413663 | Water treatment apparatus and method A water treatment apparatus includes a housing comprising multiple housing portions and a plurality of treatment sections disposed within the housing, each treatment section comprising at least one distinct particulate layer. The apparatus is designed so that no wat... | 08/19/2008 |
| 7407587 | Method and sorbent for selective removal of contaminants from fluids Anion exchange materials loaded with oxygen-containing metal compounds within the exchange matrix as a sorbent, and a method for preparation. The materials remove arsenic and other ligands or contaminants from water and other fluid streams. ... | 08/05/2008 |
| 7404901 | Method for the removal of arsenic ions from water A method for the removal of arsenic ions from water with a porous silica composition with an organofunctional moiety comprising a thio which binds the arsenic ion and is then removed from the water. The method comprises the quality of the water. ... | 07/29/2008 |
| 7399416 | Reactive filtration In one embodiment, a reactive filtration method includes continuously regenerating a reactive filter media while simultaneously filtering contaminants from fluid flowing through the filter media. In one embodiment, regenerating the reactive filter media comprises mi... | 07/15/2008 |
| 7393466 | Compositions and methods for anion absorbent metal hydroxides A metal hydroxide complex has a formula Me(OH)4*A−*nH2O or MeO2*A−*nH2O. Preferred complexes are formed in an alkaline medium, and particularly especially preferred anions include cyanide and cyanide gold complexes. Contemplated complexes a... | 07/01/2008 |
| 7371326 | Water treatment/remediation system A treatment system passes feed water containing a contaminant such as perchlorate through a bed of strong base anion exchange resin that has been placed in a form (e.g., in sulfate form) to selectively capture the contaminant while passing other ions (e.g., nitrate)... | 05/13/2008 |
| 7357871 | Method for evaluating cation-exchange resin and method for controlling water treatment system using the same A method for a cation-exchange resin wherein a strongly acidic cation-exchange resin is contacted with an aqueous eluting solution and the polystyrenesulfonic acid being eluted from this resin is measured, which comprises setting a plurality of molecular weight rang... | 04/15/2008 |
| 7338603 | Process using rare earths to remove oxyanions from aqueous streams Oxyanions of various contaminant elements, such as chromium, antimony, molybdenum, tungsten, vanadium and uranium, are removed from water and other aqueous feeds by treating the feed with (1) a sorbent comprising one or more rare earth compounds, usually mixed or su... | 03/04/2008 |
| 7335307 | Method for removing contaminants from water using ruthenium based contaminant sorbents and oxidizers Ruthenium compounds, either alone or in combination with other remediating compounds, can be used to oxidize, remove and sequester contaminants in water and soil or sediments. ... | 02/26/2008 |
| 7335623 | Method of synthesizing zirconium-loaded fibrous adsorbent materials having phosphoryl groups and removal of objectionable substances using the adsorbents A zirconium-loaded fibrous adsorbent material having phosphoryl groups which is produced by first grafting a reactive monomer having phosphoryl groups onto a polymeric substrate and then loading zirconium. ... | 02/26/2008 |
| 7326346 | High capacity regenerable sorbent for removal of arsenic and other toxic ions from drinking water The present invention is directed to a sorbent comprising a disordered polyvalent metal oxide on the surface of an inert substrate. The substrate can be a layered silicate, such as vermiculite, an aluminosilicate such as montmorillonite, or a nonlayered silicate suc... | 02/05/2008 |
| 7314570 | Method for removing heavy metals from media containing heavy metals by means of a Lyocell moulded body, cellulosic moulded body comprising absorbed heavy metals, and the use of the same The invention relates to a method for the adsorption of heavy metals from media containing heavy metals, using a Lyocell moulded body. The invention also relates to a cellulosic moulded body comprising adsorbed heavy metals and the use of the same as an antibacteria... | 01/01/2008 |
| 7314569 | Treatment of arsenic-contaminated water using akaganeite adsorption The present invention comprises a method and composition using akaganeite, an iron oxide, as an ion adsorption medium for the removal of arsenic from water and affixing it onto carrier media so that it can be used in filtration systems. ... | 01/01/2008 |
| 7311840 | Inorganic ion exchangers for removing contaminant metal ions from liquid streams The invention relates to processes and compositions for at least partially removing cations of one or more metals selected from the group consisting of caesium, strontium, lead, silver, transition metals, lanthanides and actinides from a liquid containing the cation... | 12/25/2007 |
| 7311842 | Lignocellulose-based anion-adsorbing medium (LAM) and process for making and using same for the selective removal of phosphate and arsenic anionic contaminants from aqueous solutions A lignocellulose-based anion-adsorbing medium (LAM) and process for making and using same for selectively removing phosphates and arsenic contaminants from aqueous solutions is disclosed. Making the LAM comprises (a) dissociating cations such as Fe and Al, from thei... | 12/25/2007 |
| 7309436 | Process for removing perchlorate ions from water streams Methods and systems for removing perchiorate from water are disclosed which involve the use of a plurality of vessels containing an ion exchange resin having affinity for perchiorate ions, and in which perchiorate-contaminated water is passed over the resin in some ... | 12/18/2007 |
| 7306738 | Method of deionizing solution yielded by polyester decomposition with ethylene glycol There is provided a method for deionizing a decomposition produced solution resulting from decomposition of a polyester by ethylene glycol. The ester interchange reaction and hydrolysis reaction along with cation removing treatment of a decomposition product resulti... | 12/11/2007 |
| 7303683 | Microorganism-removing filter medium having high isoelectric material and low melt index binder A filter medium capable of removing microorganisms from a fluid such as water. The filter medium includes particles of activated carbon, particles of a substantially insoluble inorganic material having an isoelectric point greater than the fluid being filtered. A lo... | 12/04/2007 |
| 7300589 | Process for removing arsenic from aqueous streams Arsenic is removed from water and other aqueous feeds by (1) treating the feed with a compound containing cerium in the +4 oxidation state, preferably cerium dioxide, to oxidize arsenic in the +3 oxidation state to arsenic in the +5 oxidation state and (2) removing ... | 11/27/2007 |
| 7294276 | Process for preparing fluoropolymer dispersions A process to substantially remove the fluorinated anionic surfactants from fluoropolymer dispersions comprising the following steps: a) addition to the fluoropolymer dispersion of an anionic polyelectrolyte; b) con... | 11/13/2007 |
| 7291271 | Meso-frequency traveling wave electro-kinetic continuous adsorption system The invention provides a non-cyclic, meso-frequency traveling wave electro-kinetic system capable of use in purification/separation and/or refrigeration/heat pump processes. In particular, the invention provides an adsorption system that can be used for fine or bulk... | 11/06/2007 |
| 7291273 | Methods for removing metals from plating operation The present invention relates to compounds and methods for removing metals, e.g., ionic cobalt from an electroless plating operation, preferably to levels less than 5 ppm. The metals can then be either landfilled or regenerated for electrowinning and reuse. The inve... | 11/06/2007 |
| 7282153 | Method for removal of arsenic from water A method for removing arsenic from water by contacting water with a strong base anion exchange resin comprising at least one metal ion or metal-containing ion whose arsenate salt has a Ksp no greater than 10−5, provided that the metal is not ... | 10/16/2007 |
| 7273556 | Method for treating water containing manganese The invention concerns a method for treating water for human consumption, so as to eliminate manganese and possibly other metals comprising steps which consist in: causing said water to pass at least over a bed of filtering material (3) consisting at least pa... | 09/25/2007 |
| 7267776 | Foams for removing pollutants and/or heavy metals from flowable media The present invention relates to a method of using foam to remove pollutants and/or heavy metals from a flowable media. The method may include providing a foam that may include cavities wherein the cavities may include an adsorbent composition of iron oxyhydroxy gra... | 09/11/2007 |
| 7250230 | Water filter for an electrochemical fuel cell system Silica may form as a degradation product in an electrochemical fuel cell system and may be found within the water management subsystem thereof. The silica may polymerize and/or react to form insoluble metal silicates which may lead to reduced lifetime or performance... | 07/31/2007 |
| 7247242 | Arsenic removal from water Methods for removing arsenic from water by addition of inexpensive and commonly available magnesium oxide, magnesium hydroxide, calcium oxide, or calcium hydroxide to the water. The hydroxide has a strong chemical affinity for arsenic and rapidly adsorbs arsenic, ev... | 07/24/2007 |
| 7244359 | Inorganic ion sorbent method A process and medium for decontamination of water containing anionic species including arsenic and chromium, wherein compounds comprising divalent and trivalent metal oxides and sulfides are used to form surface complexes with contaminants under pH conditions within... | 07/17/2007 |
| 7235180 | Sulfate-selective anion exchange resins for use in combination with TRSS resins in feed water treatment An improved system of resins comprising a combination of a sulfate-specific strongly basic anion exchange resin and a heterogenous hybrid thermally regenerable salt sorbent (TRSS) resin is provided. The anion exchange resin contains triethylamine and/or tributylamin... | 06/26/2007 |
| 7166226 | Ion exchange cryptands covalently bound to substrates One embodiment of the invention comprises an ion exchange composition formed by reacting unsaturated carbon to carbon moieties pendant from derivatized ion binding cryptands with a support substrate under free radical activation conditions to form a covalent bond th... | 01/23/2007 |
| 7157006 | Method for perchlorate removal from ground water A method for removing perchlorate or other anionic contaminates from ground water which comprises the step of passing the ground water over activated carbon, wherein the activated carbon has been either preloaded with an organic cation functional group or organic ca... | 01/02/2007 |
| 7138063 | Method of removing arsenic and other anionic contaminants from contaminated water using enhanced coagulation An improved water decontamination process comprising contacting water containing anionic contaminants with an enhanced coagulant to form an enhanced floc, which more efficiently binds anionic species (e.g., arsenate, arsenite, chromate, fluoride, selenate, and borat... | 11/21/2006 |
| 7098327 | Dual-functional ion exchange resins from agricultural by-products A process for the production of dual-functional ion exchange resins from lignocellulosic agricultural material involving anionization of the lignocellulosic agricultural material with citric acid and then cationization of the lignocellulosic agricultural material wi... | 08/29/2006 |
| 7083731 | Precious metal scavenging from a liquid medium with a functionalised polymer fiber A method for the recovery of a metal from a liquid medium containing the metal I solution or in finely divided insoluble from comprises contacting the medium with a functionalized polymer fiber capable of binding the metal and recovering the metal from the fiber. Th... | 08/01/2006 |
