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| Number | Title | Issue Date |
| 7824524 | Highly protonated, supercharged, low pH, non-corrosive composition A highly protonated, supercharged, low pH, non-corrosive composition and process for making the composition wherein the composition has a milli-volt charge between 400 and 1400, a proton count between 8×10^≧and 14×10^≧, and a pH level at 1 part composition wit... | 11/02/2010 |
| 7220391 | UV photochemical option for closed cycle decomposition of hydrogen sulfide Methods and systems for separating hydrogen and sulfur from hydrogen sulfide(H2S) gas. Hydrogen sulfide(H2S) gas is passed into a scrubber and filtration unit with polysulfide solution. Interaction frees elemental sulfur which is filtered, exce... | 05/22/2007 |
| 6964755 | Method for producing high activity photocatalyst, photoactivity catalyst, and method for treating hydrogen sulfide for recovering hydrogen gas under low energy by using high activity photocatalyst A high activity catalyst is obtained by oxidizing and modifying the surface of zinc sulfide by hydrogen peroxide. An oxidation treatment is carried out in basic aqueous solution. The high activity photocatalyst is added to the basic aqueous solution in which hydroge... | 11/15/2005 |
| 6773555 | Method for treating exhaust gas The present invention relates to a flue gas treatment method and apparatus for removing sulfur oxides by injecting ammonia into flue gas containing sulfur oxides. In the flue gas treatment method for removing sulfur oxides contained in the flue gas using ammonia, th... | 08/10/2004 |
| 6652825 | Method of producing calcium sulfate alpha-hemihydrate A method of producing calcium sulfate -hemihydrate is disclosed, including the steps of exposing a mixture including a calcium sulfate form selected from the group consisting of calcium sulfate dihydrate, calcium sulfate ଲ-hemihydrate, water-... | 11/25/2003 |
| 6355084 | Method for producing a fertilizer from gas containing sulfur oxides The present invention relates to a method and an apparatus for producing a fertilizer by injecting ammonia into and applying electron beam to gas containing sulfur oxides. Gas containing sulfur oxides is cooled by a heat exchanger (2) and a cooling tower ... | 03/12/2002 |
| 6248218 | Closed cycle photocatalytic process for decomposition of hydrogen sulfide to its constituent elements A method and system for separating hydrogen and sulfur from hydrogen sulfide(H2 S) gas being produced from oil and gas waste streams. The hydrogen sulfide(H2 S) gas is first passed into a scrubber and filtration unit where it encount... | 06/19/2001 |
| 6222089 | Process for destroying chlorinated aromatic compounds A process for destroying aromatic compounds in an exhaust gas containing also sulfur dioxide, nitrogen oxides and dust, first the dust is removed at a temperature of between room temperature and 150° C. to a residual quantity of not more than 50 mg/m | 04/24/2001 |
| 6179968 | Method and apparatus for treating gas by irradiation of electron beam A method and apparatus for treating gas by irradiation with an electron beam. Flue gas discharged from a fuel combustion facility is treated with an electron beam to remove sulfur oxides and/or nitrogen oxides. Ammonia is added to the flue gas and the mix... | 01/30/2001 |
| 6117403 | Barrier discharge conversion of Hg, SO2 and NOx A process and apparatus for reducing particulate, nitrogen oxides ("NOx"), sulfur dioxide ("SO2 "), and mercury ("Hg") emissions from the combustion exhaust of fossil fuel fired plants while producing an end product that is commercially useful,... | 09/12/2000 |
| 6093288 | Desulfurizing method and apparatus by irradiation of electron beam A high temperature gas containing sulfur oxides is desulfurized by converting sulfur oxides to ammonium compounds by the injection of ammonia and irradiation with an electron beam. The high temperature gas containing the sulfur oxides is cooled by contact... | 07/25/2000 |
| 5935538 | Apparatus and method for photocatalytic conditioning of flue gas fly-ash particles A process is provided for conditioning fly-ash present in flue gas which also contains sulfur dioxide and steam by subjecting the fly-ash containing flue gas to ultraviolet radiation so as to convert steam present in the flue gas into hydroxyl radicals wh... | 08/10/1999 |
| 5834722 | Method and apparatus for treating waste gases by exposure to electron beams The improved method for treating waste gases by exposure to electron beams which comprises adding ammonia to a waste gas containing sulfur oxide (SOx) and/or nitrogen oxides (NOx) and thereafter exposing the gas to an electron beam s... | 11/10/1998 |
| 5807526 | Device for removal of SO2 and NOx from flue gases by high frequency discharge by Tesla coil or other high voltage and high frequency generator A device for removal of SO2 and NOx from flue gas by high frequency discharge has a chamber having a first inlet opening for entry of flue gas into the chamber and an outlet opening for flue gas to exit from the chamber after removal... | 09/15/1998 |
| 5723838 | Method for treating incinerator effluent gas Electron beam irradiation step is followed by alkaline material atomizing step in the present invention. Since irradiation step and alkaline material atomizing step is conducted in different time and in different reactors, the construction cost of X-ray s... | 03/03/1998 |
| 5698830 | Process for the preparation of alkanesulphonic acids The invention relates to the preparation of alkanesulphonic acids by photo-oxidation of dialkyl disulphides. The procedure is carried out in solution in an alcohol using a light source irradiating between 200 and 320 nm.... | 12/16/1997 |
| 5695616 | Electron beam flue gas scrubbing treatment A flue-gas scrubbing arrangement removes sulfur oxides and nitrogen oxides from stack gases at low energy costs and converts these into non-noxious ammonium sulfate-nitrate, which is utilizable as an agricultural fertilizer. The flue gases, cleaned of fly... | 12/09/1997 |
| 5527985 | Process for recycling waste sulfuric acid A process for recycling waste sulfuric acid by decomposing organic contaminants by use of light energy, comprising exposing a waste sulfuric acid containing contaminants to a focused radiation emission having an irradiation intensity within the range of f... | 06/18/1996 |
| 5419819 | Self-regenerating column chromatography The present invention provides a process for treating both cations and anions by using a self-regenerating, multi-ionic exchange resin column system which requires no separate regeneration steps. The process involves alternating ion-exchange chromatograph... | 05/30/1995 |
| 5397444 | Process for removal of SO2 and NOx from combustion flue gases and an apparatus used therefor Removal of SO2 and NOx from combustion flue gases is effected to be subjected to irradiation by an electron beam and to the action of microwaves applied in the form of a continuous and/or pulsed stream. The stream of flue gases irrad... | 03/14/1995 |
| 5380629 | Method of making and a photographic element containing bleach accelerator silver salts This invention provides a process for preparing a bleach accelerator silver salt dispersion by precipitating a salt of a bleach accelerating compound and a silver salt wherein the vAg is maintained at a predetermined level during the precipitation. This i... | 01/10/1995 |
| 5211923 | Hydrogen and sulfur recovery from hydrogen sulfide wastes A process for generating hydrogen and elemental sulfur from hydrogen sulfide waste in which the hydrogen sulfide is associated under plasma conditions and a portion of the hydrogen output is used in a catalytic reduction unit to convert sulfur-containing ... | 05/18/1993 |
| 5108565 | Method for removing harmful gas from refuse combustion exhaust gas A method of removing harmful gas from a refuse combustion exhaust gas. The refuse combustion exhaust gas, containing a harmful gas such as hydrogen chloride, is supplied to a reactor. Other steps include atomizing an alkaline material within the reactor, ... | 04/28/1992 |
| 5041271 | Method of treating waste gas by irradiation with electron beam A waste gas containing sulfur oxides (SOx) and/or nitrogen oxides (NOx) is purified by leading the waste gas to a radiation irradiation zone, adding ammonia (NH3) to the waste gas before, during or after the irradiation, c... | 08/20/1991 |
| 5015443 | Method of and apparatus for treating waste gas by irradiation with electron beam A method of and apparatus for treating waste gas by irradiation with electron beams wherein an electron beam irradiation chamber for irradiation with electron beams from an electron beam accelerator is provided in the vicinity of a main dust for waste gas... | 05/14/1991 |
| 4995955 | Optically-assisted gas decontamination process The present invention comprises a process for the removal of oxides of nitrogen and sulfur from a gas mixture containing those species by exposure of the gas mixture to ultraviolet radiation having a wavelength below 200 nanometers in absence of ammonia.... | 02/26/1991 |
| 4969984 | Exhaust gas treatment process using irradiation In an exhaust gas treatment process, the exhaust gas is first irradiated in the presence of ammonia to produce particulates, and is then fed into an electrostatic precipitator and then to a mechanical filter device, whereby the treated effluent gas releas... | 11/13/1990 |
| 4961830 | Method of inhibiting adhesion of by-product inside duct in treatment of waste gas by electron beam irradiation In a waste gas treating method wherein waste gas is treated by adding ammonia thereto and irradiating this waste gas with electron beams, the adhesion of a by-product to the inner wall of a duct is inhibited by feeding the waste gas after irradiation with... | 10/09/1990 |
| 4921589 | Polysiloxane bound photosensitizer for producing singlet oxygen This invention relates to a photosensitizer which is bound to a polysiloxane polymer, a method of preparing the bound photosensitizer and a process for using the bound photosensitizer. The photosensitizers which may be used in the invention include rose b... | 05/01/1990 |
| 4915804 | Titanate bound photosensitizer for producing singlet oxygen This invention relates to a photosensitizer which is bound to a titanate polymer, a method of preparing the bound photosensitizer and a process for using the bound photosensitizer. The photosensitizers which may be used in the invention include rose benga... | 04/10/1990 |
| 4915916 | Method of and apparatus for treating waste gas by irradiation with electron beam A method and apparatus for treating waste gas by irradiation with electron beams wherein an electron beam irradiation chamber for irradiation with electron beams from an electron beam accelerator is provided in the communication with a main duct containin... | 04/10/1990 |
| 4678760 | Method of forming a substantially interwoven matrix containing a refractory hard metal and a metal compound The invention discloses an improvement in a process wherein a first reactant comprising one or more metals or metal compounds exothermically reacts with a second reactant comprising at least one or more metals or metal compounds in the presence of a third... | 07/07/1987 |
| 4673560 | Generation of sulphur trioxide from oleum using microwave energy Process and apparatus for the generation of sulphur trioxide from oleum using microwave energy for use in the sulphonation and nitration of organic compounds and the fortification of oleum. The process provides improved control of production and concentra... | 06/16/1987 |
| 4671951 | Purification and reconcentration of waste sulphuric acid This invention relates to a process for the production of concentrated sulphuric acid from waste sulphuric acid which comprises subjecting said waste acid to microwave energy for a sufficient period of time to effect production of water vapor, whereby sai... | 06/09/1987 |
| 4671952 | Vaporizing liquid sulfur dioxide with microwave radiation Process and apparatus for the generation of sulphur dioxide vapor from contaminated liquid sulphur dioxide. The process allows of utilization of contaminated liquid sulphur dioxide and comprises subjecting liquid sulphur dioxide feed to microwave energy f... | 06/09/1987 |
| 4623437 | Catalysts for photo-assisted oxidation-reduction reactions New catalysts for photo-assisted (i.e. promoted by light) oxidation-reduction (redox) reactions are disclosed. These catalysts consist of colloidal particles of a semiconductor, containing on their surface a reduction catalyst and an oxidation catalyst. I... | 11/18/1986 |
| 4540598 | Process for curing acid-curable finishes Oxime sulfonates of the formula I ##STR1## in which m is 0 or 1 and n is 1 or 2, R1 and R2 are monovalent radicals or, together with the atoms to which they are linked, form a ring system, and R3 is the n-valent radic... | 09/10/1985 |
| 4405424 | Method for producing hydrogen and elemental sulphur by photochemical oxidation-reduction of hydrogen sulphide and metal sulphides Hydrogen and elemental sulphur are produced by irradiation by visible light of solutions of hydrogen sulphide or of metal sulphides in presence of a catalyst consisting of a semiconductor material, such as cadmium sulphide, coated with a transparent layer... | 09/20/1983 |
| 4401553 | System and method for lowered hydrogen sulfide emissions from oil shale Improved process and system for reducing the amounts of hydrogen sulfide emitted during pyrolysis of oil shale. At the elevated temperatures of oil shale pyrolysis, iron pyrite is converted to hydrogen sulfide which is emitted with the product gases and o... | 08/30/1983 |
| 4391608 | Process for the beneficiation of carbonous materials with the aid of ultrasound A process for reducing the sulfur and ash content of coal and the like by treatment in an aqueous slurry with ultrasound followed by subsequent separating steps.... | 07/05/1983 |
