FR2163694A1 - Purificn of exhaust gases - using platinum-rhodium mixts on refractory carriers as catalysts - Google Patents
Purificn of exhaust gases - using platinum-rhodium mixts on refractory carriers as catalystsInfo
- Publication number
- FR2163694A1 FR2163694A1 FR7244808A FR7244808A FR2163694A1 FR 2163694 A1 FR2163694 A1 FR 2163694A1 FR 7244808 A FR7244808 A FR 7244808A FR 7244808 A FR7244808 A FR 7244808A FR 2163694 A1 FR2163694 A1 FR 2163694A1
- Authority
- FR
- France
- Prior art keywords
- exhaust gases
- catalysts
- purificn
- mixts
- rhodium
- Prior art date
- 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.)
- Granted
Links
- 239000003054 catalyst Substances 0.000 title abstract 2
- 239000007789 gas Substances 0.000 title abstract 2
- 239000000969 carrier Substances 0.000 title 1
- PXXKQOPKNFECSZ-UHFFFAOYSA-N platinum rhodium Chemical compound [Rh].[Pt] PXXKQOPKNFECSZ-UHFFFAOYSA-N 0.000 title 1
- 229910052763 palladium Inorganic materials 0.000 abstract 2
- 229910052697 platinum Inorganic materials 0.000 abstract 2
- 229910052703 rhodium Inorganic materials 0.000 abstract 2
- 230000003197 catalytic effect Effects 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 229930195733 hydrocarbon Natural products 0.000 abstract 1
- 150000002430 hydrocarbons Chemical class 0.000 abstract 1
- 230000000977 initiatory effect Effects 0.000 abstract 1
- 230000014759 maintenance of location Effects 0.000 abstract 1
- 229910044991 metal oxide Inorganic materials 0.000 abstract 1
- 150000004706 metal oxides Chemical class 0.000 abstract 1
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
- B01D53/34—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
- B01D53/944—Simultaneously removing carbon monoxide, hydrocarbons or carbon making use of oxidation catalysts
-
- 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
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
- B01J23/40—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals of the platinum group metals
- B01J23/46—Ruthenium, rhodium, osmium or iridium
- B01J23/464—Rhodium
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Organic Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Materials Engineering (AREA)
- Biomedical Technology (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Catalysts (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The catalysts consist of a refractory, monolithic metal oxide carrier, with at least part of the surface coated with a mixt. of 30-95 wt.% Pt and 5-70 wt.% Rh. Pref. is not >70% Pd is included, pref. compsns. contg. 20-70% Pd, 20-70% Pt and 1-50% Rh. They cause catalytic oxidn. of CO and hydrocarbons in exhaust gases, esp. from vehicles and show greater initial activity and retention of activity on heating, than coatings of Pt alone.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US20888271A | 1971-12-16 | 1971-12-16 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2163694A1 true FR2163694A1 (en) | 1973-07-27 |
| FR2163694B1 FR2163694B1 (en) | 1975-11-07 |
Family
ID=22776418
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR7244808A Granted FR2163694A1 (en) | 1971-12-16 | 1972-12-15 | Purificn of exhaust gases - using platinum-rhodium mixts on refractory carriers as catalysts |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPS4885493A (en) |
| DE (1) | DE2259189A1 (en) |
| FR (1) | FR2163694A1 (en) |
| IT (1) | IT971446B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52147584A (en) * | 1976-06-02 | 1977-12-08 | Nissan Motor Co Ltd | Production of exhaust gas treatment catalyst |
| JPS5366889A (en) * | 1976-11-27 | 1978-06-14 | Matsushita Electric Ind Co Ltd | Heterogeneous oxidation catalyst |
| JPS55104652A (en) * | 1979-02-05 | 1980-08-11 | Tokyo Roki Kk | Catalyst for purifying exhaust from internal combustion engine |
| US4308233A (en) * | 1980-03-10 | 1981-12-29 | Bridgestone Tire Company Limited | Device for purification of exhaust gas |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2061385A5 (en) * | 1969-09-16 | 1971-06-18 | Johnson Matthey Co Ltd |
-
1972
- 1972-12-01 IT IT3238472A patent/IT971446B/en active
- 1972-12-02 DE DE19722259189 patent/DE2259189A1/en active Pending
- 1972-12-13 JP JP47124439A patent/JPS4885493A/ja active Pending
- 1972-12-15 FR FR7244808A patent/FR2163694A1/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2061385A5 (en) * | 1969-09-16 | 1971-06-18 | Johnson Matthey Co Ltd | |
| FR2061384A5 (en) * | 1969-09-16 | 1971-06-18 | Johnson Matthey Co Ltd |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2163694B1 (en) | 1975-11-07 |
| IT971446B (en) | 1974-04-30 |
| JPS4885493A (en) | 1973-11-13 |
| DE2259189A1 (en) | 1973-06-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |