IT956364B - Procedimento di decomposizione di ossido di azoto - Google Patents
Procedimento di decomposizione di ossido di azotoInfo
- Publication number
- IT956364B IT956364B IT25411/72A IT2541172A IT956364B IT 956364 B IT956364 B IT 956364B IT 25411/72 A IT25411/72 A IT 25411/72A IT 2541172 A IT2541172 A IT 2541172A IT 956364 B IT956364 B IT 956364B
- Authority
- IT
- Italy
- Prior art keywords
- decomposition
- procedure
- nitrogen oxide
- nitrogen
- oxide
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—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, aerosols
- B01D53/32—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, aerosols by electrical effects other than those provided for in group B01D61/00
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—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, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—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, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
- B01D53/9404—Removing only nitrogen compounds
- B01D53/9409—Nitrogen oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/08—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor
- B01J19/087—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor employing electric or magnetic energy
- B01J19/088—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor employing electric or magnetic energy giving rise to electric discharges
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/0892—Electric or magnetic treatment, e.g. dissociation of noxious components
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
- F01N3/28—Construction of catalytic reactors
- F01N3/2839—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration
- F01N3/2846—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration specially adapted for granular supports, e.g. pellets
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
- F01N3/28—Construction of catalytic reactors
- F01N3/2882—Catalytic reactors combined or associated with other devices, e.g. exhaust silencers or other exhaust purification devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
- F01N2240/04—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being an electric, e.g. electrostatic, device other than a heater
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
- F01N2240/28—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being a plasma reactor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2250/00—Combinations of different methods of purification
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2330/00—Structure of catalyst support or particle filter
- F01N2330/08—Granular material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2370/00—Selection of materials for exhaust purification
- F01N2370/02—Selection of materials for exhaust purification used in catalytic reactors
- F01N2370/04—Zeolitic material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2470/00—Structure or shape of gas passages, pipes or tubes
- F01N2470/18—Structure or shape of gas passages, pipes or tubes the axis of inlet or outlet tubes being other than the longitudinal axis of apparatus
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B1/00—Engines characterised by fuel-air mixture compression
- F02B1/02—Engines characterised by fuel-air mixture compression with positive ignition
- F02B1/04—Engines characterised by fuel-air mixture compression with positive ignition with fuel-air mixture admission into cylinder
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Combustion & Propulsion (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- General Health & Medical Sciences (AREA)
- Organic Chemistry (AREA)
- Treating Waste Gases (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US05/151,396 US3983021A (en) | 1971-06-09 | 1971-06-09 | Nitrogen oxide decomposition process |
Publications (1)
Publication Number | Publication Date |
---|---|
IT956364B true IT956364B (it) | 1973-10-10 |
Family
ID=22538577
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT25411/72A IT956364B (it) | 1971-06-09 | 1972-06-08 | Procedimento di decomposizione di ossido di azoto |
Country Status (4)
Country | Link |
---|---|
US (1) | US3983021A (it) |
DE (1) | DE2227949A1 (it) |
FR (1) | FR2140584B3 (it) |
IT (1) | IT956364B (it) |
Families Citing this family (68)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4451436A (en) * | 1983-02-01 | 1984-05-29 | Hare Louis R O | Nitrogen fixation by plasma and catalyst |
US4795617A (en) * | 1984-01-16 | 1989-01-03 | Hare Louis R O | Electroluminescent chemical activation system |
DE3414121A1 (de) * | 1984-04-14 | 1985-10-24 | Brown, Boveri & Cie Ag, 6800 Mannheim | Verfahren und vorrichtung zur reinigung von abgasen |
DE3521462C2 (de) * | 1985-06-14 | 1993-10-21 | Guenter J Britz | Verfahren zur Beseitigung von Schadstoffen im Abgas von Verbrennungskraftmaschinen |
ES2032881T3 (es) * | 1988-02-08 | 1993-03-01 | Thomas Josef Heimbach Gmbh & Co. | Filtro de hollin. |
JPH038412A (ja) * | 1989-06-07 | 1991-01-16 | Sachiko Okazaki | 放電法による排気ガスのNOx除去方法 |
JP2909553B2 (ja) * | 1989-10-18 | 1999-06-23 | トヨタ自動車株式会社 | 排気ガス浄化用触媒及び排気ガスの浄化方法 |
JPH0461917A (ja) * | 1990-06-25 | 1992-02-27 | Mitsubishi Heavy Ind Ltd | 排ガス処理装置 |
US5147516A (en) * | 1990-07-19 | 1992-09-15 | Tecogen, Inc. | NOx reduction by sulfur tolerant coronal-catalytic apparatus and method |
US5458748A (en) * | 1990-07-19 | 1995-10-17 | Thermo Power Corporation | Coronal-catalytic apparatus and method for NOx reduction |
US5240575A (en) * | 1990-07-19 | 1993-08-31 | Tecogen Inc. | NOx reduction by sulfur tolerant coronal-catalytic apparatus and method |
US5637198A (en) * | 1990-07-19 | 1997-06-10 | Thermo Power Corporation | Volatile organic compound and chlorinated volatile organic compound reduction methods and high efficiency apparatus |
US5246554A (en) * | 1991-03-18 | 1993-09-21 | Cha Chang Y | Process for selected gas oxide removal by radiofrequency catalysts |
US5362451A (en) * | 1991-03-18 | 1994-11-08 | Cha Chang Y | Process and reactor for char-gas oxide reactions by radiofrequency catalysis |
US5284556A (en) * | 1991-05-01 | 1994-02-08 | Plasmachines, Inc. | Exhaust treatment system and method |
GB9218207D0 (en) * | 1992-08-27 | 1992-10-14 | Atomic Energy Authority Uk | The purification of internal combustion engine exhaust emissions |
JPH0822367B2 (ja) * | 1992-11-27 | 1996-03-06 | 富士通株式会社 | ガス浄化装置 |
DE4416676C2 (de) * | 1994-05-11 | 2002-11-07 | Siemens Ag | Vorrichtung zur Entgiftung von Abgasen aus mobilen Anlagen |
US5806305A (en) | 1994-05-18 | 1998-09-15 | Lockheed Martin Corporation | Method and apparatus for reducing pollutants |
DE19510804A1 (de) * | 1995-03-24 | 1996-09-26 | Dornier Gmbh | Verfahren und Vorrichtung zur Stickoxidminderung in Abgasen von Verbrennungsmaschinen |
US5609736A (en) * | 1995-09-26 | 1997-03-11 | Research Triangle Institute | Methods and apparatus for controlling toxic compounds using catalysis-assisted non-thermal plasma |
IT1280969B1 (it) * | 1995-10-13 | 1998-02-11 | Coral Spa | Dispositivo di depurazione dei gas di scarico di un motore a combustione interna |
US5863413A (en) | 1996-06-28 | 1999-01-26 | Litex, Inc. | Method for using hydroxyl radical to reduce pollutants in the exhaust gases from the combustion of a fuel |
US6029442A (en) | 1996-12-18 | 2000-02-29 | Litex, Inc. | Method and apparatus for using free radicals to reduce pollutants in the exhaust gases from the combustion of fuel |
US6047543A (en) | 1996-12-18 | 2000-04-11 | Litex, Inc. | Method and apparatus for enhancing the rate and efficiency of gas phase reactions |
US6321531B1 (en) | 1996-12-18 | 2001-11-27 | Litex, Inc. | Method and apparatus for using free radicals to reduce pollutants in the exhaust gases from the combustion of a fuel |
FR2763933B1 (fr) * | 1997-06-02 | 1999-08-20 | Rhodia Chimie Sa | Procede de preparation de zircons par traitement hydrothermique et zircons ainsi obtenus |
GB9715409D0 (en) * | 1997-07-23 | 1997-09-24 | Aea Technology Plc | Gas purification |
GB9726713D0 (en) * | 1997-12-19 | 1998-02-18 | Aea Technology Plc | Gas purification |
GB9718968D0 (en) * | 1997-09-09 | 1997-11-12 | Aea Technology Plc | Substrate media for plasma gas processing reactors |
EP1017477B1 (en) * | 1997-09-09 | 2001-05-23 | AEA Technology plc | Treatment of gaseous emissions |
GB9719434D0 (en) * | 1997-09-13 | 1997-11-12 | Aea Technology Plc | The processing of gaseous media |
GB9722173D0 (en) * | 1997-10-22 | 1997-12-17 | Aea Technology Plc | Plasma gas processing device |
GB9801775D0 (en) * | 1998-01-29 | 1998-03-25 | Aea Technology Plc | Gas purification |
GB9805628D0 (en) * | 1998-03-18 | 1998-05-13 | Aea Technology Plc | Gas processing reactors |
DE19819372C2 (de) | 1998-04-30 | 2000-03-02 | Degussa | Verfahren zur Verminderung des Stickoxidgehaltes der Abgase eines Verbrennungsmotors |
US6027616A (en) * | 1998-05-01 | 2000-02-22 | Mse Technology Applications, Inc. | Extraction of contaminants from a gas |
GB2346528A (en) * | 1999-01-21 | 2000-08-09 | Aea Technology Plc | Power supply for processing of gaseous media |
EP1061119A1 (en) | 1999-06-17 | 2000-12-20 | Abb Research Ltd. | Dielectric barrier discharge cracking |
US6689252B1 (en) | 1999-07-28 | 2004-02-10 | Applied Materials, Inc. | Abatement of hazardous gases in effluent |
US6468490B1 (en) * | 2000-06-29 | 2002-10-22 | Applied Materials, Inc. | Abatement of fluorine gas from effluent |
DE19950083C2 (de) * | 1999-10-18 | 2002-12-19 | Hermsdorfer Inst Tech Keramik | Vorrichtung zur Stabilisierung eines ferroelektrischen Plasmareaktors |
GB9924999D0 (en) | 1999-10-22 | 1999-12-22 | Aea Technology Plc | Reactor for the plasma treatment of gases |
GB0015952D0 (en) | 2000-06-30 | 2000-08-23 | Aea Technology Plc | Plasma assisted reactor |
US6391146B1 (en) | 2000-04-11 | 2002-05-21 | Applied Materials, Inc. | Erosion resistant gas energizer |
US6673323B1 (en) | 2000-03-24 | 2004-01-06 | Applied Materials, Inc. | Treatment of hazardous gases in effluent |
DE60111040T2 (de) * | 2000-04-11 | 2005-10-20 | Accentus Plc, Didcot | Plasmaunterstützte gasbehandlung |
KR100365368B1 (ko) | 2000-05-16 | 2002-12-18 | 한국기계연구원 | 저온 플라즈마에 의한 유해가스 처리방법 |
GB0020430D0 (en) * | 2000-08-18 | 2000-10-04 | Aea Technology Plc | Plasma assisted gas reactors |
KR100434940B1 (ko) * | 2000-12-12 | 2004-06-10 | 한국기계연구원 | 저온 플라즈마 및 유전열을 이용하여 유해가스를 처리하기위한 촉매 반응기 및 그 처리방법 |
GB2370518A (en) * | 2000-12-15 | 2002-07-03 | Aea Technology Plc | Plasma gas purification using a metal hydroxide |
US6508991B2 (en) * | 2001-03-16 | 2003-01-21 | Global Environmental Concepts, Llc | Emission control device and method |
GB0110345D0 (en) * | 2001-04-27 | 2001-06-20 | Accentus Plc | Reactor for trapping and oxidation of carbonaceous material |
US6824748B2 (en) * | 2001-06-01 | 2004-11-30 | Applied Materials, Inc. | Heated catalytic treatment of an effluent gas from a substrate fabrication process |
US6808694B2 (en) * | 2001-09-21 | 2004-10-26 | Battelle Memorial Institute | NOx reduction methods and apparatuses |
US20030101936A1 (en) * | 2001-12-04 | 2003-06-05 | Dong Hoon Lee And Yong Moo Lee | Plasma reaction apparatus |
US20030226751A1 (en) * | 2002-06-11 | 2003-12-11 | Kasten Stephen P. | Corona discharge ozone generator |
US7347979B2 (en) * | 2003-06-17 | 2008-03-25 | Nittetsu Mining Co., Ltd. | Gas processing method and gas processing apparatus utilizing oxidation catalyst and low-temperature plasma |
US7569193B2 (en) | 2003-12-19 | 2009-08-04 | Applied Materials, Inc. | Apparatus and method for controlled combustion of gaseous pollutants |
US7377101B2 (en) * | 2004-02-13 | 2008-05-27 | Fleetguard, Inc. | Plasma fuel converter NOx adsorber system for exhaust aftertreatment |
GB0403797D0 (en) * | 2004-02-20 | 2004-03-24 | Boc Group Plc | Gas abatement |
US7736599B2 (en) | 2004-11-12 | 2010-06-15 | Applied Materials, Inc. | Reactor design to reduce particle deposition during process abatement |
US7468171B2 (en) * | 2005-01-31 | 2008-12-23 | Toyota Motor Corporation | Process using microwave energy and a catalyst to decompose nitrogen oxides |
CN101300411B (zh) | 2005-10-31 | 2012-10-03 | 应用材料公司 | 制程减降反应器 |
US8097554B2 (en) * | 2009-02-09 | 2012-01-17 | Airflow Catalyst Systems, Inc. | Apparatus for removing soot from diesel engine exhaust streams at temperatures at or below 150° C. |
US20120124976A1 (en) * | 2010-11-24 | 2012-05-24 | Airflow Catalyst Systems, Inc. | Apparatus for removing mixed nitrogen oxides, carbon monoxide, hydrocarbons and diesel particulate matter from diesel engine exhaust streams at temperatures at or below 280 degrees c |
US11439932B2 (en) | 2019-01-11 | 2022-09-13 | Lawrence Livermore National Security, Llc | System and method for engineered ceramic packages for use in fluid treatment technologies |
TWI801058B (zh) * | 2021-12-23 | 2023-05-01 | 明遠精密科技股份有限公司 | 一種複合式電漿源及其運作方法 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3316057A (en) * | 1959-07-22 | 1967-04-25 | Du Pont | Method of treating exhaust gases of internal combustion engines |
US3179488A (en) * | 1961-12-13 | 1965-04-20 | Koppers Co Inc | Method of treating exhaust gases of internal combustion engines |
US3524721A (en) * | 1967-12-22 | 1970-08-18 | Ethyl Corp | Catalyst composition |
-
1971
- 1971-06-09 US US05/151,396 patent/US3983021A/en not_active Expired - Lifetime
-
1972
- 1972-06-08 DE DE2227949A patent/DE2227949A1/de active Pending
- 1972-06-08 FR FR7220685A patent/FR2140584B3/fr not_active Expired
- 1972-06-08 IT IT25411/72A patent/IT956364B/it active
Also Published As
Publication number | Publication date |
---|---|
FR2140584B3 (it) | 1975-08-08 |
FR2140584A1 (it) | 1973-01-19 |
US3983021A (en) | 1976-09-28 |
DE2227949A1 (de) | 1973-01-04 |
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