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| Number | Title | Issue Date |
| 7563355 | Cell for gas generation A cell for gas generation is provided, particularly for the operation of a lubricant dispenser. The cell has two electrodes to be connected to a circuit containing a power source, and an aqueous electrolyte fluid located between the two electrodes, containing an azi... | 07/21/2009 |
| 7429315 | Electrolytic generation of nitrogen using azole derivatives The invention provides electrolytes for the electrochemical generation of nitrogen gas by anodic oxidation of triazole and tetrazole derivatives. Electrolytic cells incorporating these electrolytes are also disclosed. The nitrogen gas so produced may be useful to ac... | 09/30/2008 |
| 7378068 | Electrochemical process for decomposition of hydrogen sulfide and production of sulfur The present invention includes a process for the removal of hydrogen sulfide from hydrogen sulfide gas containing gaseous streams. In one embodiment, the process comprises feeding a sulfide ion containing solution to an oxidation unit. The method further comprises f... | 05/27/2008 |
| 7306711 | Electrolytic generation of nitrogen using azole derivatives The invention provides electrolytes for the electrochemical generation of nitrogen gas by anodic oxidation of triazole and tetrazole derivatives. Electrolytic cells incorporating these electrolytes are also disclosed. The nitrogen gas so produced may be useful to ac... | 12/11/2007 |
| 7241373 | Nitrogen treating method There is provided a nitrogen treating method capable of treating nitrogen compounds efficiently. The method is a nitrogen treating method of treating nitrogen compounds in for-treatment water by electrolysis and performs a first treating step of producing ammonia fr... | 07/10/2007 |
| 7175765 | Method for treating for-treatment water containing organic matter and nitrogen compound There is provided a method for treating for-treatment waste water containing an organic matter and a nitrogen compound, which can quickly and efficiently treat the for-treatment water containing the organic matter and the nitrogen compound and greatly reduce a power... | 02/13/2007 |
| 7160430 | Electrochemical treatment of ammonia in waste-water In a sewage treatment plant, dissolved ammonium is extracted from the waste-water stream, and is transferred to a body of secondary water. The secondary water is passed through an electrolysis station, where the ammonium is transformed to nitrogen gas. The capture a... | 01/09/2007 |
| 7011750 | Water treatment device The object of the present invention is to provide a water treatment device in which temperature does not affect performance in nitrogen removal. Water circulates in a first anaerobic filter bed chamber 5, a second anaerobic filter bed chamber 10, a con... | 03/14/2006 |
| 6835298 | Electrolytic generation of nitrogen using azole derivatives The invention provides electrolytes for the electrochemical generation of nitrogen gas by anodic oxidation of triazole and tetrazole derivatives. Electrolytic cells incorporating these electrolytes are also disclosed. The nitrogen gas so produced may be useful to ac... | 12/28/2004 |
| 6818107 | Chemical reactor The invention relates to a chemical reactor having an electrochemical cell containing a three-layer structure for the decomposition and removal of a substance treated by a chemical reaction. ... | 11/16/2004 |
| 6440293 | Electrode and electrolyte for use in preparation of nitrogen trifluoride gas, and preparation method of nitrogen trifluoride gas by use of them An electrode for electrolyzing an electrolyte comprising an ammonium fluoride (NH4 F)-hydrogen fluoride (HF)-containing molten salt and having a composition ratio (HF/NH4 F) of 1 to 3 to prepare a nitrogen trifluoride (NF3... | 08/27/2002 |
| 6436275 | Electrochemical reduction of nitrate in the presence of an amide The electrochemical reduction of nitrates in aqueous solutions thereof in the presence of amides to gaseous nitrogen (N2) is described. Generally, electrochemical reduction of NO3 proceeds stepwise, from NO3 to N2 | 08/20/2002 |
| 6299743 | Electrolytic generation of nitrogen The invention provides methods and devices for the electrochemical generation of nitrogen from organic nitrogen compounds, such as hydrazides (RCONHNH2), the corresponding organic hydrazino-carboxylates (RCO2 NHNH2) and am... | 10/09/2001 |
| 6241871 | Electrochemical oxidation of hydrogen sulfide The invention relates to a process for gas phase electrochemical oxidation of H2 S to sulfur and water or steam using an electrolysis cell having an anode chamber on one side of a solid proton conducting membrane and a cathode chamber on the ot... | 06/05/2001 |
| 6132591 | Method for removal of sulfate groups and chlorate groups from brine In removal of sulfate groups and chlorate groups from brine used for electrolysis, concentrated brine used in an electrolysis process or dilute brine whose concentration is decreased by electrolysis is fed to an anode chamber divided by a cation exchange ... | 10/17/2000 |
| 6083377 | Electrochemical treatment of water contaminated with nitrogenous compounds Waters contaminated by nitrogenous compounds such as nitrate, ammonium, etc., are treated by electrochemical transformation of the contaminant to nitrogen gas. Electrodes are placed in the contaminated water to form a cell, in which the voltage of one of ... | 07/04/2000 |
| 5942099 | Method and device for removal of NOx from engine exhaust An apparatus and method for removing NOx from the exhaust of internal combustion engines. The apparatus has a porous absorbent body saturated with a liquid alkaline electrolyte for absorption of NOx as nitrate and nitrite, in which b... | 08/24/1999 |
| 5908545 | Electrochemical process for decomposing hydrogen sulfide to produce hydrogen and sulfur A process is described for decomposing hydrogen sulfide to produce hydrogen and sulfur. The process comprises mixing hydrogen sulfide with a volatile basic solution and introducing this mixture into an electrolytic cell having an anode and a cathode. By o... | 06/01/1999 |
| 5578189 | Decomposition and removal of H2 S into hydrogen and sulfur The method of removing sulfurous compounds (organic and inorganic) from any fluid (gas or liquid) phase by contacting said fluid (gas or liquid) with the reactive metal to form a metal sulfide recovering said fluid (gas or liquid) free from said sulfurous... | 11/26/1996 |
| 5456807 | Method and apparatus for treating nitrogen oxide-containing gas streams using a combined electrochemical-sorbent approach A method is provided for selectively removing nitrogen oxides from gaseous mixtures using alkali and/or alkaline earth oxides as sorbents, followed by conversion of the adsorbed NOx into N2 and O2 using a solid-oxide elect... | 10/10/1995 |
| 5376240 | Process for the removal of oxynitrogen species for aqueous solutions A process for electrochemically treating an aqueous solution containing inorganic oxynitrogen species is disclosed in which the aqueous solution is fed into the catholyte compartment of an electrochemical reduction cell using a high surface area cathode s... | 12/27/1994 |
| 5354436 | Process for removing nitrogen compounds from a liquid The invention concerns a device and a method for removing nitrogen compounds from an aqueous liquid containing nitrogen oxides (NOx) and/or nitrates (NO3-). It comprises an electrochemical cell (10) with a cathode and an a... | 10/11/1994 |
| 5352337 | Method for reducing nitrogen oxides A direct current voltage is applied between an anodic portion containing an oxidizing catalyst provided on one surface of a proton conductive solid electrolyte which separates the flow path of the gas to be treated into two parts, and a cathodic portion c... | 10/04/1994 |
| 5330857 | Method of generating high-purity nitrogen gas High-purity nitrogen gas is generated by reducing at least the residual oxygen content of at least the cathode exhaust gas stream of a fuel cell device. The oxygen reduction is achieved either by controlling the passage of an oxidant gas through the catho... | 07/19/1994 |
| 5306400 | Method for the combined removal and destruction of nitrate ions A method for the combined removal and destruction of nitrate ions in an electrochemical cell which includes an anode compartment containing electrolyte and an anode, a cathode compartment containing electrolyte and a cathode, and a central compartment con... | 04/26/1994 |
| 5019227 | Electrochemical method for producing hydrogen and sulfur A process for the electrochemical production of hydrogen gas and sulfur from hydrogen sulfide gas is disclosed. The process includes forming a substantially equimolar mixture of hydrosulfide and sodium hydrogen. That mixture is transferred to the anodic c... | 05/28/1991 |
| 4995952 | Electrolysis of water using hydrogen sulfide Conditions have been found which make possible the continuous electrolysis of water using hydrogen sulfide. Contrary to the previous claims, it is not necessary to add a solvent for sulfur extraction. The invention avoids the difficulty of the passivation... | 02/26/1991 |
| 4818353 | Method for modifying electrocatalyst material, electrochemical cells and electrodes containing this modified material, and synthesis methods utilizing the cells A transition metal electrocatalyst surface (e.g. a porous surface of finely divided Group VIII or Group I-B metal with an attached current collector) is modified by a sulfur treatment, using an oxidized sulfur species of average sulfur oxidation state of ... | 04/04/1989 |
| 4772366 | Electrochemical separation and concentration of sulfur containing gases from gas mixtures An electrochemical cell is provided for removing H2 S from a gas mixture. The cell includes porous, gas diffusion electrodes and a membrane containing an aqueous alkaline polysulfide electrolyte. H2 S is reduced to polysulfide ions a... | 09/20/1988 |
| 4765873 | Continuous process for the removal of hydrogen sulfide from a gaseous stream A process for removing hydrogen sulfide from a gaseous stream containing hydrogen sulfide by contacting said stream with an aqueous solution of ammonium hydroxide to produce ammonium sulfide; converting said ammonium sulfide to an ammonium polysulfide int... | 08/23/1988 |
| 4734172 | Method for selectively recovering lead from complex sulphidic non-ferrous metal concentrates The invention relates to a method for selectively recovering lead from complex sulphidic non-ferrous metal concentrates in an electrolytic cell incorporating at least one anode and one cathode and an electrolyte containing chlorine ions, at a temperature ... | 03/29/1988 |
| 4670113 | Electrochemical activation of chemical reactions A process for the gasification or combined gasification and liquefaction of carbon or carbonaceous materials by utilizing electrochemically generated atomic hydrogen to activate the chemical reaction between the ions of dissociated water and the carbon or... | 06/02/1987 |
| 4643806 | Electrocatalytic energy conversion and chemicals production Oxidation reactions and unsaturation producing reactions are disclosed to be carried out in a solid-state electrocatalytic reactor for electrolytic energy conversion and chemicals production. Additional reactions are disclosed to be carried out in a solid... | 02/17/1987 |
| 4473449 | Flowthrough electrochemical hemodialysate regeneration An improved method and electrolytic cell for the oxidation of nitrogen-containing waste materials in a dialysate stream used for hemodialysis, hemofiltration or peritoneal dialysis comprises a cylinder having a porous anode and a porous cathode spaced apa... | 09/25/1984 |
| 4443423 | Method of removing hydrogen sulfide from gases utilizing a polyvalent metal chelate solution and electrolytically regenerating the solution A process for the removal of H2 S from sour gas streams is disclosed, the process being characterized by the use of a washing or contacting solution containing oxidizing polyvalent metal chelates of specified aminocarboxylic acids, the electrol... | 04/17/1984 |
| 4443424 | Method of removing hydrogen sulfide from gases utilizing a polyvalent metal chelate solution and electrolytically regenerating the solution A process for the removal of H2 S from sour gas streams is described, the process being characterized by the utilization of washing solutions containing oxidizing polyvalent metal chelates of specified aminocarboxylic acids, and by the electrol... | 04/17/1984 |
| 4436712 | Method of removing hydrogen sulfide from gases utilizing a polyvalent metal chelate of nitrilotriacetic acid and electrolytically regenerating the solution A process for the removal of H2 S from sour gas streams is disclosed, the process being characterized by the use of a washing or contacting solution containing oxidizing polyvalent metal chelates of nitrilotriacetic acid, the electrolytic regen... | 03/13/1984 |
| 4436713 | Method of removing hydrogen sulfide from gases utilizing a polyvalent metal chelate of nitrilotriacetic acid and regenerating the solution in a fuel cell A process for the removal of H2 S from sour gas streams is described, the process being characterized by the utilization of washing solutions containing oxidizing polyvalent metal chelates of nitrilotriacetic acid, and by the regeneration of th... | 03/13/1984 |
| 4436714 | Method of removing hydrogen sulfide from gases utilizing a polyvalent metal chelate of nitrilotriacetic acid and electrolytically regenerating the solution A process for the removal of H2 S from sour gas streams is disclosed, the process being characterized by the utilization of washing solutions containing oxidizing metal chelates of nitrilotriacetic acid, and by the electrolytic regeneration of ... | 03/13/1984 |
| 4436711 | Method of removing hydrogen sulfide from gases utilizing a polyvalent metal chelate solution and regenerating the solution in a fuel cell A process for the removal of H2 S from sour gas streams is described, the process being characterized by the utilization of washing solutions containing oxidizing polyvalent metal chelates of specified amino-carboxylic acids, and by the regener... | 03/13/1984 |
