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| Number | Title | Issue Date |
| 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 |
| 7329624 | Regenerable adsorbents for the purification of silicone based solvents An adsorbent for removal of impurities from silicone based solvents is presented. The adsorbent is regenerable for repeated use in cleaning silicone based solvents. ... | 02/12/2008 |
| 7147067 | Zeolite-containing drilling fluids Methods and compositions for wellbore treating fluids, especially drilling fluids, that comprise zeolite and a carrier fluid. ... | 12/12/2006 |
| 7140439 | Zeolite-containing remedial compositions Methods and compositions for wellbore treating fluids, especially remedial compositions such as pills, that include zeolite and at least one carrier fluid. ... | 11/28/2006 |
| 7138545 | Metal salts Alkali metal carboxylate salt brines, such as cesium formate brine, are used in oil and gas drilling procedures. Contamination with chloride ions can be controlled by treatment with a silver salt solution, and removing silver chloride formed. High density brines can... | 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 |
| 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 and cations from solutions and/or slurries including the steps of: (a... | 02/21/2006 |
| 6897272 | α-olefins and olefin polymers and processes therefor Disclosed herein are processes for polymerizing ethylene, acyclic olefins, and/or selected cyclic olefins, and optionally selected olefinic esters or carboxylic acids, and other monomers. The polymerizations are catalyzed by selected transition metal compounds, and ... | 05/24/2005 |
| 6727202 | Enhanced NOx trap having increased durability A catalytic trap disposed in an exhaust passage of an internal combustion engine which is operated with periodic alternations between lean and stoichiometric or rich conditions, for abatement of NOx in an exhaust gas stream which is generated by the engin... | 04/27/2004 |
| 6657036 | Polycondensation resins and polyaddition resins produced by heterogeneous catalysis The invention relates to polycondensation resins which are prepared by polycondensation of compounds having a low molecular weight and separation of small molecules in the presence of at least one hetergeneous catalyst. The invention also relates to polya... | 12/02/2003 |
| 6218327 | Mixed cation adsorbent having substantially uniform cation distribution An improved process for production of mixed cation-exchanged adsorbents that involves a single pass ion exchange. The precursor (non-exchanged) zeolite is treated with a combined essentially stoichiometric and excess solution of desirable weakly held and ... | 04/17/2001 |
| 6187192 | Microbiological water filter A method and device for the filtration and/or purification of fluids water or other solutions containing microbiological contaminants, such as fluids containing including bacteria and/or viruses, where the fluid water is passed through a purification mate... | 02/13/2001 |
| 6124508 | Quaternary phosphonium salt catalysts in catalytic hydrolysis of alkylene oxides A process for the preparation of alkylene glycols by reacting an alkylene oxide with water in the presence of at least one ionic composition of a quaternary phosphonium cation of the general formula R1 R2 R3 R4 P | 09/26/2000 |
| 5958817 | Adsorbent production with single pass ion exchange An improved process for production of mixed cation-exchanged adsorbents that involves a single pass ion exchange. The precursor (non-exchanged) zeolite is treated with a combined essentially stoichiometric and excess solution of desirable weakly held and ... | 09/28/1999 |
| 5948265 | Ion-exchanger, process for production thereof, and process for removal of multiply charged anions employing the ion-exchanger An ion-exchanger is provided which comprises zirconium hydroxide supported on active carbon. The process for producing the ion-exchanger, and a process for removing a multiply charged anion are also provided which employ the ion-exchanger. The ion-exchang... | 09/07/1999 |
| 5780384 | Hydrated manganese dioxide oxidation catalysts and process of producing same The present invention generally relates to supported mono charged cation delta manganese dioxide hydrate having a noble metal on the surface thereof, and to the use thereof for low temperature oxidation of volatile organic compounds (VOCs), particularly o... | 07/14/1998 |
| 5502016 | Method to treat an ion-exchanger catalyst for the process of bisphenol-A synthesis In the process of bisphenol-A systhesis a method for controlling the water content of the resultant cation-exchanger bed wherein an acid ion-exchanger resin in the form of a sulphonated styrene-divinylbenzene copolymer is washed with phenol and the result... | 03/26/1996 |
| 5468536 | Sorbent articles A microfibrous sorbent article is provided. The microfibrous sorbent article comprises an elongate boom having a substantially oval cross-section. The boom is formed of multiple adjacent microfibers layers, the layers being bonded to each other by entangl... | 11/21/1995 |
| 5461022 | Thin film hydrous metal oxide catalysts Thin film ( | 10/24/1995 |
| 5382558 | Heat resistant layered porous silica and process for producing the same A heat resistant layered porous silica having a honeycomb porous structure comprises a plurality of waved or bent sheet layers of crystalline layered silicate superposed one after another, and the neighboring sheets are partially bonded by siloxane bondin... | 01/17/1995 |
| 5175064 | Fuel cells based on oxidation of organics over metal exchanged ଲ-aluminas Novel fuel cells based on the fast ion conductors, transition metal exchanged ଲ"-alumina and other similar metals capable of undergoing a change in oxidation state, which are used as catalysts for the deep oxidation of hydrocarbon-type fuels.... | 12/29/1992 |
| 5139981 | Process for preparing silver(I)-exchanged resins This invention relates to a method for removing halides from liquid carboxylic acid contaminated with a halide impurity by contacting the liquid halide-contaminated acid with a silver(I)-exchanged macroreticular resin. The halide reacts with the resin-bou... | 08/18/1992 |
| 5051202 | Process for bleaching and increasing the ion-exchange capability of sepiolite The present invention refers to a process for bleaching and increasing the ion-exchange capability of the sepiolite mineral, basically consisting of treating, at high pH and temperature, the sepiolite with a basic salt solution, which results in bleaching... | 09/24/1991 |
| 4956154 | Selective removal of chromium, nickel, cobalt, copper and lead cations from aqueous effluent solutions Aqueous effluent solutions containing metal cations may be treated with an extractant comprising an organophosphinic acid, a di-2-ethylhexyl phosphoric acid and/or an aliphatic amine to selectively separate chromium, nickel, cobalt, copper and lead cation... | 09/11/1990 |
| 4929582 | Hydrous oxide ion-exchange compound catalysts A catalytic material of improved activity which comprises a hydrous, alkali metal or alkaline earth metal or quaternary ammonium titanate, zirconate, niobate, or tantalate, in which the metal or ammonium cations have been exchange with a catalytically eff... | 05/29/1990 |
| 4795824 | Process for the production of dialkyl maleates A process is described for the production of a dialkyl maleate by reaction of maleic anhydride with an alkyl alcohol in a monoesterification zone to form the corresponding monoalkyl maleate, followed by reaction of resulting monoalkyl maleate with further... | 01/03/1989 |
| 4780239 | Ion exchange resin for immobilizing radioactive waste Disclosed is a method of making an ion exchange material. A ceramic material is ion implanted with sulfur, carbon, phosphorus, or nitrogen, which is oxidized to sulfate, carboxylate or carbonate, phosphate, or nitrate, respectively, or the nitrogen is red... | 10/25/1988 |
| 4695556 | Catalyst resins and process for their preparation The invention relates to a new process for the preparation of strongly acid cation exchangers loaded with catalytically active metals by loading the cation exchangers with a solution of a salt of the catalytically active metal and reducing the cation exch... | 09/22/1987 |
| 4661465 | Method for preparing transition metal component of Ziegler-Natta catalysts A method for preparing Ziegler catalysts is disclosed wherein a mixture (A) containing the product resulting from mixing in an inert hydrocarbon diluent (1) a hydrocarbon soluble magnesium alkyl compound in said hydrocarbon solvent, (2) an aliphatic alcoh... | 04/28/1987 |
| 4629710 | Resin catalysts and method of preparation Heat stabilized catalyst compositions are prepared from nuclear sulfonic acid, for example, macroporous crosslinked polyvinyl aromatic compounds containing sulfonic acid groups are neutralized with a metal of Al, Fe, Zn, Cu, Ni, ions or mixtures and alkal... | 12/16/1986 |
| 4542002 | Silicates with high ion exchange capacity derived from sepiolite and processes for their production Silicate having high ion exchange capacity are obtained by reacting sepiolites with a base, preferably a strong base in the presence of a polar liquid at a temperature, preferably elevated, and for a period sufficient to increase the ion exchange capacity... | 09/17/1985 |
| 4540509 | Crystalline 3-layer lithium aluminates Ion exchange resins in the base form, e.g., DOWEX MWA--1--OH ion exchange resin, which contain crystalline Al(OH)3, e.g., gibbsite, and/or bayerite, and/or norstrandite, are treated with hot, concentrated LiX solutions (where X is anion) to pre... | 09/10/1985 |
| 4523027 | Purification of carboxylates containing aldehydes, acetals and/or unsaturated compounds Carboxylates which contain aldehydes, acetals and/or unsaturated compounds and are obtained by reacting an olefinically unsaturated compound with carbon monoxide and an alkanol are purified by a process wherein the said carboxylates are treated with hydro... | 06/11/1985 |
| 4466906 | Catalyst for the oxidation of mercaptans to disulfides, process for the preparation thereof, and its use in the sweetening of petroleum distillates A catalyst suited for use in the sweetening of petroleum distillates (by oxidizing mercaptans to disulfides) which is formed of a metal complex of a polyaminoalkylpolycarboxylic acid deposited directly on a basic anion exchange resin. The method of making... | 08/21/1984 |
| 4461714 | Method of making crystalline 2-layer lithium aluminates in ion exchange resins The bayerite form of crystalline alumina, Al(OH)3, contained within a macroporous ion exchange resin is converted to the gibbsite form of Al(OH)3 by reaction with hot MgX2, where X is halide, followed by water-washing the ... | 07/24/1984 |
| 4343717 | Process for the preparation of stable silica sol Stable, colloidal, silica sol is provided by a process which comprises vigorously mixing a slurry of calcium silicate with a dilute acid having a pKa value of less than about 8, such as sulfuric acid, and thereafter separating the sol from the ... | 08/10/1982 |
| 4333847 | Fixation by anion exchange of toxic materials in a glass matrix This invention relates to the immobilization of toxic, e.g., radioactive materials, internally in a silicate glass or silica gel matrix for extremely long periods of time. Toxic materials, such as radioactive wastes containing radioactive anions, and in s... | 06/08/1982 |
| 4299735 | Heavy metal-manganese oxidation catalysts and process of producing same Alkali metal delta manganese dioxide hydrate, which is obtained as a by-product in the industrial oxidation of organics by KMnO4 is subjected to ion exchange reaction with heavy metal ions (copper, iron, silver, etc.). The reaction is carried o... | 11/10/1981 |
| 4292205 | Ion exchange and impregnation of catalysts An improved process for impregnation or ion exchange of catalysts or catalyst supports utilizing ebullated bed techniques.... | 09/29/1981 |
| 4278820 | Process for preparing monoalkylene glycol monoethers A monoalkylene glycol monoether is produced with good efficiency and commercial advantage by reacting an alkylene oxide with an alcohol in the presence of a solid catalyst resulting from the exchange of exchangeable cations of a montmorillonite clay with ... | 07/14/1981 |
