| 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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| 04/30/1991 | US5012037 Integrated thermal swing-pressure swing adsorption process for hydrogen and hydrocarbon recovery |
| 04/30/1991 | US5011810 Denitration of exhaust gases; improved peel strength |
| 04/30/1991 | US5011520 Hydrodynamic fume scrubber |
| 04/30/1991 | CA1283611C Enhanced performance in rapid pressure swing adsorption processing |
| 04/30/1991 | CA1283542C Process for cooling and cleaning producer gas and blast furnace gas and apparatus for performing this process |
| 04/27/1991 | CA2028427A1 Regeneration of acidic cationic exchange resin used in the reactivation of spent alkanolamine |
| 04/27/1991 | CA2027435A1 Removal of heat stable anions from alkanolamine salts |
| 04/25/1991 | DE4027353A1 Gas laser with humidity control - by solid electrolyte-type desiccating device |
| 04/25/1991 | DE3935094A1 Solvent recovery - by activated carbon bed adsorption and desorption by membrane sepn. and condensation |
| 04/25/1991 | CA2013554A1 Method for removing nitrogen oxides from gases |
| 04/24/1991 | EP0424335A2 Method and apparatus for the purification of air, flue gases or the like |
| 04/24/1991 | EP0424259A1 Process for the improvement of the sulphur yield of a sulphur production unit fed with a hydrogen sulphide containing acid gas |
| 04/24/1991 | EP0423857A1 Process for making a channel plate with paralleled plates, device for carrying out the process |
| 04/24/1991 | EP0423417A1 Process for the selective, non-catalytic reduction of the emissions from oil-fired boiler plants |
| 04/24/1991 | EP0423113A1 Incineration of waste materials |
| 04/24/1991 | CN1050870A Preparation of piperazinones for use as sulfur dioxide absro bents |
| 04/24/1991 | CN1050830A Process to remove metal species from exhaust vapors |
| 04/24/1991 | CN1050826A Process and device for processing materials from which methane and other chemicals, being harmful to the environment may escape |
| 04/24/1991 | CN1012419B Integrated pressure swing adsorption / membrane separation |
| 04/23/1991 | US5010052 Zirconium dioxide gas desulfurization catalyst |
| 04/23/1991 | US5010051 Staged three-way conversion catalyst and method of using the same |
| 04/23/1991 | US5009872 Method of oxidizing gaseous substances |
| 04/23/1991 | US5009871 Method of removing mercury in exhaust gases from a waster incinerator |
| 04/23/1991 | US5009870 Treatment with long chain sulfur compounds on electro-conductive solid carrier |
| 04/23/1991 | US5009869 Using electrochemical cell |
| 04/23/1991 | US5009857 Filter for gases |
| 04/23/1991 | US5009856 Recycling catalyst bed for flue gas treatment |
| 04/23/1991 | US5009781 Cross-flow filtration device with filtrate network and method of forming same |
| 04/23/1991 | US5009763 Honeycomb solid oxide electrolytic cell assembly and method |
| 04/23/1991 | US5009308 Controlled rate adsorbent unit and method of fabrication thereof |
| 04/23/1991 | US5009071 Process for adsorption cooling/conditioning by means of low-temperature heat |
| 04/20/1991 | WO1991005733A1 Process for the improvement of the sulphur yield of a sulphur production assembly which includes a sulphur plant and an oxidation and hydrolysis unit with a purification unit using a gas containing h2s |
| 04/18/1991 | WO1991005205A1 PROCESS FOR REDUCING THE NOx CONTENT IN FURNACE FLUE GASES |
| 04/18/1991 | WO1991004788A1 Carbon molecular sieve for breaking down air into nitrogen and oxygen by the alternating pressure technique |
| 04/18/1991 | DE4032249A1 Brightening flue gas gypsum |
| 04/18/1991 | DE4001558C1 Decontaminating soil contg. mineral oil hydrocarbon - by three-stage biological degradation of contaminants under non-aerobic and aerobic conditions |
| 04/18/1991 | DE3933480A1 Treating combustion off-gas with denox catalyst - to eliminate organic prods. of in complete combustion |
| 04/18/1991 | DE3933441A1 Kohlenstoff-molekularsieb zur zerlegung von luft in stickstoff und sauerstoff durch druckwechseltechnik Carbon molecular sieve to dissection of air into nitrogen and oxygen pressure by changing technology |
| 04/18/1991 | DE3933286A1 Verfahren zur minderung des gehaltes an stickoxiden in den rauchgasen einer feuerung Process for the reduction of the salary of nitrogen oxides in the flue gases of a tap firing |
| 04/18/1991 | DE3933111A1 Recovery of solvent - by desorption of adsorbing agent e.g. molecular sieve pack |
| 04/18/1991 | DE3926143A1 Heterogeneous catalysis - comprises passing one basic constituent through porous catalyst to react on its surface with second basic constituent |
| 04/17/1991 | EP0422999A1 Catalysts for treating exhaust gases and process for treating these exhaust gases |
| 04/17/1991 | EP0422509A1 Method and apparatus for degasing plants, which emit exhaust air with organic compounds |
| 04/17/1991 | EP0422463A1 Solvent recovery apparatus |
| 04/17/1991 | EP0422337A2 Process and device for wet purification of gases especially of flue gases |
| 04/17/1991 | EP0422066A1 Removal of sulfur dioxide (so 2?) from waste gases and recovery as sulfuric acid. |
| 04/17/1991 | CN2075102U Gas ionzation device for removing harmful pollutant in gas |
| 04/16/1991 | US5008091 Method for purifying air |
| 04/16/1991 | US5008090 Catalytic process for minimizing the H2 S emissions from automotive exhaust |
| 04/16/1991 | US5008022 Process for scavenging sulfides |
| 04/16/1991 | US5007944 Treating polyetherimide membrane with solvent or swelling agent |
| 04/16/1991 | CA1282940C Process for the desulfurization of gas containing hydrogen sulfide |
| 04/11/1991 | DE4030830A1 Removing sludge from regenerated absorbing soln. in gas sweetening - by treating with carbon di:oxide and removing ppte. formed |
| 04/11/1991 | DE4028720A1 Ceramic honeycomb body useful as catalyst in IC. engines - comprises materials of high electric constant and is fitted with microwave radiator |
| 04/10/1991 | EP0421978A1 Process for the thermal pretreatment of scrap |
| 04/10/1991 | EP0421794A2 Preparation of piperazinones for use as sulfur dioxide absorbents |
| 04/10/1991 | EP0421501A1 Process for treating gases obtained by gasification of solid pulverulent carburants |
| 04/10/1991 | EP0421500A1 Process for the desulfurization of a hydrogen sulfide containing gas |
| 04/10/1991 | EP0421468A1 Catalytic oxidation of ammonia |
| 04/10/1991 | EP0421402A1 Gas dehumidifier and gas dehumidification process |
| 04/10/1991 | EP0421137A1 Gas separation membrane and process |
| 04/10/1991 | EP0271534B1 Method for desulphurising directly flue gas in a furnace |
| 04/10/1991 | EP0257024B1 Process for the selective elimination of nitric oxides contained in exhaust gases |
| 04/10/1991 | CA2027015A1 Catalysts for treating gaseous effluents, and treatment process for said effluent |
| 04/09/1991 | US5006369 Removing contaminants from a gas stream |
| 04/09/1991 | US5006323 Method of desulfurizing combustion gases |
| 04/09/1991 | US5006322 Reduction of acid content of flue gas by neutrilizing with lime |
| 04/09/1991 | US5006315 Preventing condensation of low-volatile effluents-alternately supplying solvent; backpressure means |
| 04/09/1991 | US5006258 Regeneration of acidic cationic exchange resin used in the reactivation of spent alkanolamine |
| 04/09/1991 | US5006138 Pollution control; closed cycle refrigeration system to condense hydrocarbons or chemical from air mixture |
| 04/09/1991 | US5006132 Membrane processed purified pipeline gas |
| 04/09/1991 | CA1282714C Technical hydrogen |
| 04/09/1991 | CA1282713C Process for producing oxygen-enriched gas |
| 04/09/1991 | CA1282712C Enhanced gas separation process |
| 04/07/1991 | WO1991004780A1 Process for reducing the emission of organic compounds produced by incomplete combustion |
| 04/07/1991 | CA2027107A1 Preparation of piperazinones for use as sulfur dioxide absorbents |
| 04/06/1991 | CA2026943A1 Catalytic oxidation of ammonia |
| 04/04/1991 | WO1991004224A1 Combined catalytic/non-catalytic process for nitrogen oxides reduction |
| 04/04/1991 | WO1991004223A1 Gas separation by semi-permeable membranes |
| 04/04/1991 | WO1991004096A1 Removal of mercury from fluids by contact with activated zeolite a |
| 04/04/1991 | DE3931891A1 Removing mercury etc. from gases - by catalytic oxidn. using ozone and metal oxide catalyst e.g. platinum and nickel and nickel oxide |
| 04/03/1991 | EP0419906A1 Core element and core for electrically heatable catalytic converter |
| 04/03/1991 | EP0419747A2 Filter apparatus with improved filtration and saturation level detection |
| 04/03/1991 | EP0419539A1 Condensing sulfuric acid vapours to produce sulfuric acid. |
| 04/03/1991 | EP0419507A1 Dry exhaust gas conditioning |
| 04/03/1991 | EP0324845B1 Process for desulphurating flue gases from power station boiler furnaces |
| 04/03/1991 | CN2074216U Serial filter unit of fume |
| 04/03/1991 | CN1050403A Adsorbent for separating co from ethylene by pressure-variable adsorption process |
| 04/03/1991 | CA2020764A1 Catalyst and method for catalytically decomposing nitrogen oxides |
| 04/02/1991 | US5004718 Removal of sulfur by treating oxides of titanium, molybdenum, tungsten, vanadium with fresh hot air in furnace |
| 04/02/1991 | US5004588 Contacting stream with water soluble oxidized catalyst which oxidizes hydrogen sulfide to sulfur |
| 04/02/1991 | US5004485 Molecular sieve-type gas separation systems |
| 04/02/1991 | US5004482 Production of dry, high purity nitrogen |
| 04/02/1991 | US5004043 Internal tubular falling film apparatus for the evaporation of liquids and for the absortion or degassing of solutions of two or more substances |
| 04/02/1991 | CA1282504C Method of scavenging hydrogen sulfide |
| 04/02/1991 | CA1282317C Air scrubbing process and scrubbing liquid |
| 03/27/1991 | EP0419433A1 Adsorption drying plant |
| 03/27/1991 | EP0419356A1 Process for removing gaseous hydrids on a solid carrier consisting of metal oxides |
| 03/27/1991 | EP0419007A1 Countercurrent dehydration by hollow fibers |
| 03/27/1991 | EP0418883A1 Separation of fluids using polyimidesiloxane membrane |