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| Number | Title | Issue Date |
| 4460552 | Process for the separation of air components, such as difficultly absorbable air impurities, out of air-gas mixtures The present invention provides an apparatus and process for separating and removing chemical impurities from air which impurities are difficult to absorb. The apparatus for carrying out the process of the present invention comprises a reaction tower (11, ... | 07/17/1984 |
| 4457898 | Managanese compounds and sorption of gases using manganese compounds There are disclosed manganese compounds of the formula wherein L is a monodentate ligand of the formula wherein R1, R2, and R3 are identical or different and are substituted or unsubstituted alkyl, cycloalkyl, alkenyl, alkynyl, or a... | 07/03/1984 |
| 4439351 | Use of anionic or cationic polymers to lower the electrical resistivity of fly ash The instant invention is directed to a process for lowering the electrical resistivity of fly ash comprising adding a cationic or anionic polymer to the fly ash.... | 03/27/1984 |
| 4427630 | Gas deodorization method A sulfur compound and a nitrogen compound as ill-smelling components can efficiently be removed from a gas containing the same by bringing the gas into contact with an adsorbent comprising activated carbon having supported thereon bromine and a non-volati... | 01/24/1984 |
| 4418046 | Catalytic oxidation apparatus A catalytic oxidation apparatus comprising a cylindrical honeycomb structure including a multiplicity of small passageways extending therethrough in parallel and having an oxidizing catalyst deposited thereon, a number of the passageways being separated a... | 11/29/1983 |
| 4415342 | Air pollution control process An air pollution control process employing an improved rotatable collector, which by its position becomes a filtering and adsorbing station and a combustion and desorbing station, and an oxidizer are utilized in an apparatus and process for removing airbo... | 11/15/1983 |
| 4407785 | Method of conducting catalytically promoted gas-phase reactions There is disclosed a method for conducting catalytic reactions, particularly hydrogenation or oxidation of vaporous, carbonaceous materials, utilizing a plurality of thin catalyst bodies in a spaced-apart relationship.... | 10/04/1983 |
| 4400364 | Process for oxidizing carbon monoxide in the presence of methacrolein In a process for oxidation of methacrolein to methacrylic acid the carbon monoxide present in the recycle gas can be selectively oxidized to carbon dioxide with substantially no oxidation of the methacrolein content. A preferred catalyst for such an oxida... | 08/23/1983 |
| 4397772 | Catalyst supports and fluid treatment devices A device for treating a fluid, in particular a supported catalyst for motor vehicle exhaust gas purification. The device comprises one or more short helically wound lengths of wire at least a surface of which comprises a solid surface coating for interact... | 08/09/1983 |
| 4382913 | Process and an agent for the adsorption and catalytic decomposition of foul-smelling intestinal gases There is provided a process for the adsorption and catalytic decomposition of foul-smelling intestinal gases, particularly mercaptans, wherein the intestinal gases are passed through a highly specific adsorbent which, out of a mixture of water vapor, meth... | 05/10/1983 |
| 4374814 | Method for removal of gaseous formaldehyde from the atmosphere A method for purifying air by removing gaseous formaldehyde under ambient conditions, by bringing the air in contact with a solid shaped composition consisting essentially of one or more polyhydric water-soluble polymers and ambient moisture, in the absen... | 02/22/1983 |
| 4360504 | Simultaneous destruction of trace components in the reaction off-gas from the synthesis of melamine The reaction off-gas from the synthesis of melamine consists, after separating off the melamine, mainly of ammonia and carbon dioxide, with traces of hydrogen cyanide, isocyanic acid, urea and residual melamine. To remove these trace components, the off-g... | 11/23/1982 |
| 4346019 | Stabilization and regeneration of activated carbon supported palladium chloride catalysts in the oxidation of vinyl halides PdCl2 /C catalyst which has been deactivated in the oxidation of an olefinic halide or olefinic hydrocarbon present as contaminant in air or other inert oxygen-containing gas stream, is regenerated by prolonged exposure to air or other oxygen-c... | 08/24/1982 |
| 4342730 | Apparatus for and method of removing volatile boiler-feed additives from pressurized steam An apparatus for and a method of removal of particulate material and boiler-feed additives from pressurized, saturated steam, which apparatus includes a composite cartridge in which particulate matter is removed by a filter tube and boiler-feed additives ... | 08/03/1982 |
| 4325921 | Waste gas purification systems and methods Systems and methods for directing waste gases to a by-pass conduit from a conduit to a waste gas purifier in response to signals indicating predetermined conditions which are harmful to the waste gas purifier to which the waste gases are normally directed... | 04/20/1982 |
| 4323543 | Sorption of gases Compounds of formula I are useful in the separation of a gas such as oxygen, hydrogen, sulphur dioxide, alkenes and carbon monoxide from a fluid comprising the gas. In formula I: L represents a monodentate ligand of formula IA and X is a species capable o... | 04/06/1982 |
| 4323542 | Catalytic conversion of carbon monoxide, hydrocarbons and oxides of nitrogen A process for the continuous and simultaneous conversion of carbon monoxide, hydrocarbons and nitrogen oxides contained in hot gases, and in particular from hot exhaust gases from an internal combustion engine, is disclosed. The hot gases are passed in co... | 04/06/1982 |
| 4321240 | Treatment of gaseous effluent Disclosed is a process for treating a pollutant-containing gaseous effluent of the kind in which the pollutant is susceptible to catalytic oxidation to render it inoffensive, characterized by the steps of passing a major fraction of the effluent through m... | 03/23/1982 |
| 4297328 | Three-way catalytic process for gaseous streams A process for the catalytic combustion of carbon monoxide and hydrocarbons and the catalytic reduction of the oxides of nitrogen contained in a gas stream. The process involves intimately contacting the gaseous stream with a catalyst bed comprising copper... | 10/27/1981 |
| 4296081 | Process for purifying gaseous effluents A process for purifying gaseous effluents containing aldehydes comprises submitting the gaseous effluents to the simultaneous action of SO2 and NH3 followed by washing with water. The ratio of the required quantities of NH3 | 10/20/1981 |
| 4292285 | Method for removing compounds with offensive odor from a gas containing the same A method for removing compounds with offensive odor from an exhaust gas containing the same with a deodorant comprising a mixture of spherical particles of activated carbon and spherical particles of porous carbon impregnated with phosphoric acid or ammon... | 09/29/1981 |
| 4290923 | Rare-earth-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 rare earth ions of the ceria subgroup (viz. cerium, lanthanum, etc.). By... | 09/22/1981 |
| 4277453 | Waste gas purification reactor and method Device and method for removing dissolved organic acids from entrained liquid droplets in a waste gas stream comprising (1) heating the liquid droplets in the waste gas stream to the vaporization temperature, and (2) contacting the waste gas stream with a ... | 07/07/1981 |
| 4256728 | Deodorization method A deodorization method which comprises allowing a bad-smelling gas containing (a) hydrogen sulfide and/or a mercaptan, (b) a sulfide and/or a disulfide and (c) ammonia and/or an amine to contact (1) firstly with activated carbon, (2) then with activated c... | 03/17/1981 |
| 4249904 | Method and apparatus for extraction of airborne N-nitroso compounds without artifact formation A method and apparatus are disclosed for extracting N-nitroso compounds from air samples without artifact formation of nitrosamines from precursors in the sample. The apparatus includes a cartridge having two zones between a first port and a second port. ... | 02/10/1981 |
| 4246910 | Cigarette filter material comprising compounds of iron in high oxidation states Inert gas-permeable granular support materials impregnated with alkali ferrates wherein the ferrates are iron compounds having an oxidation state of +4, +5, or +6 are disclosed. When they are used as a granular filter material in combination with a tobacc... | 01/27/1981 |
| 4238460 | Waste gas purification systems and methods Systems and methods for directing waste gases to a by-pass conduit from a conduit to a waste gas purifier in response to signals indicating predetermined conditions which are harmful to the waste gas purifier to which the waste gases are normally directed... | 12/09/1980 |
| 4234460 | Adsorbent for ethylene and process for preparation thereof A novel adsorbent for ethylene prepared by contacting an active carbon with at least one metal substance selected from the group consisting of copper, iron, cobalt, nickel, and their salts in the presence of nitric acid; heating the same at a temperature ... | 11/18/1980 |
| 4233275 | Process and apparatus for purifying raw coal gas A high temperature, high pressure raw coal gas containing hydrogen sulfide, ammonia, and tarry matter, is purified by contacting the raw coal gas with solid particles thereby cooling the raw coal gas to a temperature suitable for hydrogen sulfide removal ... | 11/11/1980 |
| 4215096 | Removal of acidic contaminants from gas streams by caustic impregnated activated carbon Gas streams contaminated with acid and acid precursor gases and vapors are purified by contacting the gas streams with activated carbon impregnated with sodium hydroxide.... | 07/29/1980 |
| 4208385 | Process for defoaming acid gas scrubbing solutions and defoaming solutions The foam in acid gas scrubbing solutions created during an acid gas scrubbing process is reduced or eliminated by the addition of certain polyoxyethylene polyoxypropylene block copolymers as defoaming agents. The defoaming agents are particularly effectiv... | 06/17/1980 |
| 4201751 | Gas purification Pulverent solid sorption agent is injected into and, optionally, admixed with a stream of noxious-contaminant-containing gas and then separated from such gas. The solid sorption agent comprises an alkali-metal and/or alkaline-earth-metal compound and adva... | 05/06/1980 |
| 4177250 | Method of removing acetylene and sulfur compounds from gases by absorption in dimethyl formamide Dimethyl formamide when used as an absorption solvent to remove acetylenes from olefin-containing gas streams acts as well as a promoter for the oxidative conversion of H2 S, COS, and/or CS2, also contained in the feed stream, to ele... | 12/04/1979 |
| 4176161 | Oxidation over synthetic amorphous silicas Oxidation of suitable feedstock is provided wherein such feedstock is subjected to oxidation conditions in the presence of a catalytic amount of a solid containing, at least in part, a synthetic amorphous solid prepared by hydrolyzing and polymerizing in ... | 11/27/1979 |
| 4151262 | Process for the catalytic conversion of organic chlorine compounds A process has been developed for the catalytic conversion of organic chlorine compounds into carbon dioxide and hydrogen chloride, using molecular oxygen, in which process the catalyst system is provided by using platinum in a first catalyst zone and pall... | 04/24/1979 |
| 4148358 | Oxidizing hydrocarbons, hydrogen, and carbon monoxide The hydrocarbon, hydrogen and carbon monoxide concentration of a gas is reduced by reacting these constituents in the gas with oxygen in the presence of a fragmented permeable mass of combusted oil shale.... | 04/10/1979 |
| 4123502 | Process for the purification of gas generated in the pressure gasification of coal A process for the purification of gas, which is generated in pressure gasification of coal, which uses a wash oil, especially tar oil, as the washing liquid to avoid clogging of the washing apparatus by tars and tar compounds which precipitate out of the ... | 10/31/1978 |
| 4104146 | Process for the purification of gas streams Gas streams that contain from about 10 ppm to 1000 ppm of vinyl chloride are purified by passing them through a zone of silent electric discharge. This treatment destroys at least 80%, and in most cases 90% or more, of the vinyl chloride in the gas stream... | 08/01/1978 |
| 4088735 | Process for purifying gases from the gasification of fossil fuels A process for purifying gases produced by the gasification of fossil fuels by a treatment with water vapor and oxygen under superatmospheric pressure. The raw gas produced is treated to remove catalyst-deteriorating impurities such as mono- and polyunsatu... | 05/09/1978 |
| 4087258 | Process for purifying raw gas from the gasification of solid fuels A process is disclosed for purifying raw gas produced by the gasification of solid fuels under superatmospheric pressure by treatment with gasifying agents containing water vapor and free oxygen. The raw gas contains dust and hydrocarbons and is at a temp... | 05/02/1978 |
