| Patents for B01D 53 - Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols (135,933) |
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| 08/20/1991 | US5041407 High-temperature three-way catalyst for treating automotive exhaust gases |
| 08/20/1991 | US5041274 Method and apparatus for cooling, neutralizing, and removing particulates from the gaseous products of combustion |
| 08/20/1991 | US5041273 Calcium Cyanamide |
| 08/20/1991 | US5041272 Hydrogenated zeolite catalyst |
| 08/20/1991 | US5041271 Treating with ammonia |
| 08/20/1991 | US5041270 Method of purifying exhaust gases |
| 08/20/1991 | US5041268 Post-combustion chamber |
| 08/20/1991 | US5041146 Filter apparatus |
| 08/20/1991 | CA2036505A1 Gas effluent processing catalysts; processing method |
| 08/20/1991 | CA1287794C Apparatus for effecting gas-liquid contact |
| 08/20/1991 | CA1287732C Process and apparatus for low temperature amine removal of acid gases |
| 08/18/1991 | CA2036399A1 Method for manufacturing hollow fibre piles |
| 08/15/1991 | CA2030434A1 Removal of nitrogen oxides from waste gases |
| 08/14/1991 | WO1991012201A1 Method for desulphurising a gaseous mixture containing h2s and so2 and recovering said compounds in the form of sulphur |
| 08/14/1991 | EP0441487A1 Filter dryer |
| 08/14/1991 | EP0441401A1 Exhaust gas purification system for an internal combustion engine |
| 08/14/1991 | EP0441236A1 Process for treating waste gases containing ClF3 |
| 08/14/1991 | EP0441173A1 Catalyst for cleaning exhaust gases from combustion engines |
| 08/14/1991 | EP0441111A1 Particulate material |
| 08/14/1991 | EP0441062A1 Method for purification of exhaust gas and apparatus therefor |
| 08/14/1991 | EP0440932A2 Process for removal of ammonia from waste gases |
| 08/14/1991 | EP0440604A1 Devices and method for cleaning gases. |
| 08/14/1991 | DE4004358A1 Prevention of smoke from gas from incineration process |
| 08/14/1991 | DE4003939A1 Noble metal alumina catalyst contg. oxide promoter for gas purificn. - doped with base metal for cold start property and resistance to lean gas |
| 08/14/1991 | CN2082635U String shape filler tower |
| 08/14/1991 | CN1013480B Structured tower packing |
| 08/14/1991 | CN1013478B Permeable membrans for enhanced gas separation |
| 08/14/1991 | CN1013477B Wet desulfurization process for treating flus gas |
| 08/14/1991 | CN1013476B Sulfur dioxide removal from gas streams using hydroxyalkyl substituted pipe razinones |
| 08/14/1991 | CA2036206A1 Fluids separation device |
| 08/14/1991 | CA2032583A1 Process of purifying exhaust gas |
| 08/13/1991 | US5039651 Decomposing wood chips, coconut shells with zinc chloride; calcining, activating with gas; adsorbing butane |
| 08/13/1991 | US5039650 Supported catalyst containing alumina, oxides of cerium, germanium and group 8 metals; internal combustion engines |
| 08/13/1991 | US5039647 Catalyst for exhaust gas purification and method for producing the catalyst |
| 08/13/1991 | US5039645 Preparing carbon monoxide oxidation catalyst |
| 08/13/1991 | US5039644 Fired monolithic structure of alumina, titania and/or zirconia with phosphorus oxide; heat resistance, high surface area |
| 08/13/1991 | US5039641 Process for modification of a molecular sieve |
| 08/13/1991 | US5039507 Method for the continuous reduction of sulphur dioxide-containing gases using coal or carbon |
| 08/13/1991 | US5039499 Process for desulfurization of sulfur dioxide-containing gas streams |
| 08/13/1991 | US5039498 Processes for the purification of flue gases |
| 08/13/1991 | US5039429 Catalytic decomposition in presence of group 8 oxide yields oxygen and aqueous chloride solution |
| 08/13/1991 | US5039321 Apparatus for preventing clouding of a semiconductor wafer |
| 08/13/1991 | US5039319 Processes and apparatuses for removing organochemical components |
| 08/13/1991 | US5039314 Scrubbing, adsorbing in pressure-swing adsorption system and circulating gas flow; efficiency |
| 08/13/1991 | US5038815 Scrubber and muffler for exhaust gas from gas-powered valve actuators |
| 08/13/1991 | CA2036122A1 Process for dehydration of gases and composite permeable membranes therefor |
| 08/13/1991 | CA1287614C Method and composition for utilizing lime-urea hydrates to simultaneously reduce nox and sox in combustion effluents |
| 08/13/1991 | CA1287479C Process for desulphuring a fuel gas containing sulphur |
| 08/11/1991 | CA2035512A1 Process for biological waste air purification by means of a percolation system |
| 08/09/1991 | WO1991012070A1 Method and apparatus for processing nitrogen oxide gas |
| 08/08/1991 | WO1991011392A1 Method of cleaning soil water |
| 08/08/1991 | WO1991011390A2 Synthetic porous crystalline material its synthesis and use |
| 08/08/1991 | WO1991011246A1 Air purifier |
| 08/08/1991 | WO1991011243A1 Device for purifying sewage |
| 08/08/1991 | DE4102111A1 Fluid distributor baffles for mass and/or heat exchangers - comprising meshed basins incorporating capillary tubes. - by introducing water contg. ammonium, and air, then mixed with fresh ammonia |
| 08/08/1991 | DE4101045A1 Drying of foodstuffs while retaining aroma and other materials - where drying air flows around closed circuit and when passing a membrane gives up moisture which is extracted by cleaning air flow |
| 08/08/1991 | DE4100464A1 Removal of nitrogen oxides from flue gases of combustion plants - by adding ammonia to flue gases produced from ammonium salt-contg. effluent on passing through packed column |
| 08/08/1991 | DE4003064A1 Device for the denitrification of exhaust gases - has suitable bacteria added to the washing liq. in the exhaust gas scrubber to break down the nitrate(s) |
| 08/08/1991 | DE4000297A1 Alternately operating regeneratable air-drying filters - for bleed pipe in large propellant fuel storage tank |
| 08/08/1991 | CA2035631A1 Particulate material |
| 08/07/1991 | EP0440543A1 Catalyst for a purification filter of a tomb |
| 08/07/1991 | EP0440412A1 Vapor horn |
| 08/07/1991 | EP0439738A1 Process for the decomposition of organic halogen compounds |
| 08/07/1991 | EP0439599A1 Bulk materials reactor. |
| 08/07/1991 | EP0439518A1 A method and an apparatus for continuously purifying an oxygen-containing gas for combustible contaminants |
| 08/07/1991 | EP0439500A1 Cross-fed moving bed reactor with rectangular cross-section for granular adsorbent |
| 08/07/1991 | EP0252161B1 Device for purification, particularly filtration, of a fluid or gaseous medium |
| 08/07/1991 | CN2082192U Steam washing type dry or wet dust remover |
| 08/07/1991 | CN1053597A Process for concentrating chlorine |
| 08/07/1991 | CN1053561A Process and apparatus for desulfurization and denitration of waste gas by multi-stage electron beam irradiation |
| 08/07/1991 | CN1013426B Deodorizing device in refrigerator |
| 08/06/1991 | US5037796 Process for producing hydrated and cured product of lime-gypsum-coal ash mixture |
| 08/06/1991 | US5037792 Impregnation; drying; calcination; spinel compound; vanadium oxide with molybdenum oxide or tungsten oxide |
| 08/06/1991 | US5037629 Process for the selective oxidation of gaseous sulfur-containing compounds, hydrogen sulfide in particular, to form elemental sulfur |
| 08/06/1991 | US5037624 Composition, apparatus, and process, for sorption of gaseous compounds of group II-VII elements |
| 08/06/1991 | US5037554 Selectively permeable membrane |
| 08/06/1991 | US5037538 Segregation of reducing catalyst; no dilution or cracking catalyst; floating hollow sphere support |
| 08/06/1991 | US5037458 Apparatus for regenerating an adsorber in a gas drying plant |
| 08/06/1991 | US5037454 Upflow direct impingement coalescer; gas purification |
| 08/06/1991 | US5037450 Pyrolysis; sorbent particles remove sulfur by-products; nitrogen gases minimized |
| 08/06/1991 | US5036972 Adsorbent packet with integral heat shield and method of fabrication thereof |
| 08/03/1991 | CA2035052A1 Production of high purity argon |
| 08/01/1991 | DE4101439A1 Combustion gas desulphurisation within furnace - followed by wet desulphurisation of off-gas |
| 08/01/1991 | DE4013518C1 Air cleaning plant - includes fan at inlet of supply duct from which contaminated air passes through ring nozzle in duct |
| 08/01/1991 | DE4002741A1 System for operating coal fired power station plant - in which slurry from system is fed into furnace with coal to lower ash fusion point |
| 08/01/1991 | DE4002674A1 Carbon mon:oxide redn. in waste gas - by oxidn. in waste heat boiler |
| 08/01/1991 | DE4002554A1 Exhaust emission cleaning - adsorb powder to gases to absorb pitch and tar for removal and disposal |
| 08/01/1991 | DE4002462A1 Waste gas filtering and cleaning - by passage at controlled velocity through moving filter and sorbent bed |
| 08/01/1991 | DE4002437A1 Catalytic gas phase decomposition of organic halogen cpds. |
| 07/31/1991 | EP0439010A2 Poisoning-preventive layer-possessing support, poisoning-resistant catalyst, exhaust gas converter device, and poisoning-preventive gasoline composition |
| 07/31/1991 | EP0438902A2 Electrochemical reactors and multicomponent membranes useful for oxidation reactions |
| 07/31/1991 | EP0438812A1 Method for absorbing hydrogen sulfide with glyoxal |
| 07/31/1991 | EP0438722A1 Dynamic membrane separation process for improved selectivity |
| 07/31/1991 | EP0438603A1 Method of treating exhaust gas |
| 07/31/1991 | CN1053372A Device for raising qualification rate of condensation water of evaporator in alumina plant |
| 07/31/1991 | CN1013344B Method of treating exhausted liquid in wet gas conducting and treating device |
| 07/31/1991 | CN1013336B Method of preparation crystalline alpha-maltose |
| 07/31/1991 | CA2035212A1 Process and apparatus for removing pitch- or tar-containing pollutants present in exhaust gases |
| 07/30/1991 | WO1991011249A1 Spiral-wound membrane separation device with feed and permeate/sweep fluid flow control |
| 07/30/1991 | US5035875 In a container for radioactive material for combining hydrogen and oxygen to form water; prevents explosion |