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7470413 |
Fluorine removal by ion exchange
A method for removing fluorine gas from a selected environment comprises contacting the fluorine gas with water to generate a solution of hydrofluoric acid and contacting the solution of...
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7455477 |
Compound, method for stabilizing shwertmannite, method for clarifying polluted water or polluted soil, and method for adsorbing phosphoric acid
A new compound represented by a composition formula Fe 8 O 8 (OH) 8-2x ((SO 4 ) a , (HPO 4 ) b ) x (a+b=x, 1≦x≦1.75, 0<a≦1.658, 0.092≦b≦x) formed by adding a shwertmannite of a...
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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...
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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...
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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...
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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...
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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...
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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....
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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...
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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...
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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...
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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...
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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...
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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.
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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7291578 |
Hybrid anion exchanger for selective removal of contaminating ligands from fluids and method of manufacture thereof
Polymeric anion exchangers are used as host materials in which hydrated Fe(III) Oxides (HFO) are irreversibly dispersed within the exchanger beads. Since the anion exchangers have positively...
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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...
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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 K sp no...
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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...
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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...
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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...
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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...
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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...
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7074336 |
Inorganic ion sorbents and methods for using the same
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...
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7063804 |
Compositions for treating phosphate in water
Compositions including alum and a smectite mineral material for the clarification of bodies of water by removal of dissolved solids, dissolved organic materials and other anions such as fluoride...
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7045065 |
Method of removing radioactive antimony from waste streams
A method and related apparatus for monitoring and eliminating gas build-up in an anion exchange column comprised of an anion exchange material placed within a vessel and a liquid layer comprising...
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7041223 |
High efficiency ion exchanges system for removing contaminants from water
The disclosed invention is a fixed bed ion exchange water purification system. It employs a combination of electronically controlled process steps and specific systems configurations to duplicate...
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7037480 |
Calcium chloride purification
Significant amounts of soluble fluoride, known to create problems in processes requiring high quality grade calcium chloride, are removed from calcium chloride solution using hydroxyapatite as a...
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7014771 |
Process for preparing water having an arsenic level of less than 10 PPB
The present invention relates to a process for the preparation of arsenic free water and an apparatus therefor. The present invention also relates to a porous ceramic useful for pressure filtration...
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7008542 |
Method for mixed mode adsorption
Method for the removal of a substance from an aqueous liquid by ion exchange comprising providing a liquid with said substance is present; providing an adsorption matrix which comprises at least...
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7001523 |
Ion exchange
An ion exchange material comprising a superabsorbent polyurethane foam having an ion exchange medium contained therein. The ion exchange may be used in a process for the extraction of metal anions...
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6991733 |
Process for removing organics from ultrapure water
In order to reduce a total organic carbon (TOC) in ultrapure water to a level less than 1 ppb, several cycles of ozone contact/UV irradiation treatments are carried out in sequence. Preferably, the...
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6969466 |
Purification of ammonia
Highly pure aqueous solution of ammonia, typically electronics grade for use in semiconductor manufacturing is prepared by passing a solution of ammonia through at least one cation exchange resin...
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6960303 |
Alum pellets
Compositions including pellets of alum, a smectite mineral material and optionally sodium or calcium carbonate that can be delivered to a phosphate impoundment located at the bottom of a body of...
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6946076 |
Removal of phosphate from water
Methods and compositions for removing phosphate from swimming pool waters are disclosed. The compositions include both soluble and substantially insoluble lanthanide carboxylates, preferred...
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6916919 |
Isolation of DNA molecules
The present invention relates to a process for separating nucleic acid molecules, preferably open circular and supercoiled plasmid DNA and RNA molecules from each other, comprising the steps of...
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6896813 |
Sorbant sequestration and removal of toxic metal ions
A matrix for water decontamination has an amended sorbant cellulose substrate with an iron (ferric) oxyhydroxide component and a component to sorb dissolved organic compounds retained by the...
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6881761 |
Porous polymer particle, anion exchanger, producing method thereof, column for ion chromatography, and method for measuring anions
Disclosed are (1) a porous polymer particle comprising a polymer substrate having ester bonds connected to a group containing a quaternary ammonium structure through a spacer molecule, (2) an...
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6881348 |
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...
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6881346 |
Methods of treating phosphate in a body of water
Compositions including alum, a smectite material and optionally one or more of a buffer and an algaecide coating or additives for the clarification of bodies of water by removal of dissolved...
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6878286 |
High efficiency ion exchange system for removing contaminants from water
The disclosed invention is a fixed bed ion exchange water purification system. It employs a combination of electronically controlled process steps and specific systems configurations to duplicate...
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6869537 |
Metal chelate-forming fiber, process for producing the same, method of trapping metal ion with the fiber, and metal chelate fiber
A fiber capable of forming a metal chelate and a process for producing the same are disclosed, wherein the fiber is characterized in that at least one metal chelate-forming compound selected from...
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6863905 |
Enhanced iodine treatment of drinking water
A mixed bed of iodine source/iodine capture resin provides high flow rates that are useful for treatment of water. The ratio of source/capture resin can be adjusted to meet the goals of the system....
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