FR2221172B3 - - Google Patents
Info
- Publication number
- FR2221172B3 FR2221172B3 FR7408400A FR7408400A FR2221172B3 FR 2221172 B3 FR2221172 B3 FR 2221172B3 FR 7408400 A FR7408400 A FR 7408400A FR 7408400 A FR7408400 A FR 7408400A FR 2221172 B3 FR2221172 B3 FR 2221172B3
- Authority
- FR
- France
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
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- 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
- B01J29/00—Catalysts comprising molecular sieves
- B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
- B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
- B01J29/18—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the mordenite type
- B01J29/20—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the mordenite type containing iron group metals, noble metals or copper
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- 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
- B01D53/9413—Processes characterised by a specific catalyst
- B01D53/9418—Processes characterised by a specific catalyst for removing nitrogen oxides by selective catalytic reduction [SCR] using a reducing agent in a lean exhaust gas
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/202—Hydrogen
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/204—Carbon monoxide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/20—Metals or compounds thereof
- B01D2255/207—Transition metals
- B01D2255/20753—Nickel
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/20—Metals or compounds thereof
- B01D2255/207—Transition metals
- B01D2255/20761—Copper
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/50—Zeolites
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Crystallography & Structural Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Catalysts (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US34080973A | 1973-03-13 | 1973-03-13 |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2221172A1 FR2221172A1 (en) | 1974-10-11 |
FR2221172B3 true FR2221172B3 (it) | 1976-12-24 |
Family
ID=23335025
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7408400A Granted FR2221172A1 (en) | 1973-03-13 | 1974-03-12 | Catalytic redn of nitrogen oxides - in combustion motor waste gases using zeolite contg. transition metals |
Country Status (4)
Country | Link |
---|---|
JP (1) | JPS49122475A (it) |
DE (1) | DE2411853A1 (it) |
FR (1) | FR2221172A1 (it) |
IT (1) | IT1005647B (it) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS548351B2 (it) * | 1973-09-27 | 1979-04-14 | ||
JPS5242489A (en) * | 1976-05-20 | 1977-04-02 | Toa Nenryo Kogyo Kk | Nox-reduction catalyst and method of producing thereof |
US4297328A (en) * | 1979-09-28 | 1981-10-27 | Union Carbide Corporation | Three-way catalytic process for gaseous streams |
DE3544476A1 (de) * | 1985-12-16 | 1987-06-19 | Sued Chemie Ag | Eisenhaltiger katalysator zur verringerung des stickoxidgehalts von verbrennungsabgasen |
DE3635284A1 (de) * | 1986-10-16 | 1988-04-28 | Steuler Industriewerke Gmbh | Katalysator zur entfernung von stickoxiden aus abgasen |
FR2622474B2 (fr) * | 1987-04-03 | 1990-01-26 | Azote & Prod Chim | Composition catalytique de reduction selective des oxydes d'azote contenus dans des effluents gazeux oxygenes et procede d'epuration desdits effluents |
JPH01310742A (ja) * | 1988-06-07 | 1989-12-14 | Toyota Motor Corp | 排気ガス浄化用触媒 |
DE3841990A1 (de) * | 1988-12-14 | 1990-06-21 | Degussa | Verfahren zur reduktion von stickoxiden aus abgasen |
DE19728701A1 (de) * | 1997-07-04 | 1999-01-07 | Metallgesellschaft Ag | Verfahren zur Herstellung feinkörniger Katalysatoren aus natürlich vorkommendem Zeolith |
-
1974
- 1974-03-08 JP JP49027054A patent/JPS49122475A/ja active Pending
- 1974-03-12 FR FR7408400A patent/FR2221172A1/fr active Granted
- 1974-03-12 DE DE19742411853 patent/DE2411853A1/de active Pending
- 1974-03-13 IT IT1254174A patent/IT1005647B/it active
Also Published As
Publication number | Publication date |
---|---|
DE2411853A1 (de) | 1974-09-19 |
FR2221172A1 (en) | 1974-10-11 |
JPS49122475A (it) | 1974-11-22 |
IT1005647B (it) | 1976-09-30 |
Similar Documents
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |