US3929681A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic compositions useful for the oxidation of carbon monoxide and hydrocarbons and the process for preparing them
Assignee: SnamProgetti SpA
•
Filing: 1972-09-01
•
Granted: 1975-12-30
•
Expires: 1992-09-01
Abstract
Abstract A new series of compounds, represented by the formula: Cu, Mnx Mey Crz Ow, wherein Cu copper, Mn manganese, Me nickel or cobalt, Cr chromium, O oxygen; x is a number from 1 to 2, inclusive, and zero when Me is Ni and y and z are not zero; y is a number from 1 to 6, inclusive, and zero when x and z are not zero; z is a number up to 3, and zero when Me is Co and x and y are not zero; w is the index of oxygen which satisfies the valencies of the metals, having regard for their indices in the formula, that are useful as catalysts in the oxidation to CO2 and H2O of carbon monoxide and hydrocarbons contained in the exhaust gases of internal combustion engines, the preparation and the pretreatment thereof are disclosed.
Inventors
- 👤 Franco Buonomo
- 👤 Vittorio Fattore
- 👤 Gianfranco Zanoni
- 👤 Bruno Notari
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:54
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/08; F01N3/10; F01N3/24; F01N3/28; F01N3/2803; B; B01; B01D; B01D53/00; B01D53/34; B01D53/92; B01D53/94; B01D53/944; B01D53/9459; B01D53/9463; B01D53/9472; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J23/86; B01J23/868; B01J23/889; B01J23/8892; C; C01; C01B; C01B3/00; C01B3/02; C01B3/06; C01B3/12; C01B3/16; F01N13/00; F01N13/011; F01N13/017; B01D2255/00; B01D2255/20; B01D2255/207; B01D2255/2073; B01D2255/20746; B01D2255/20753; B01D2255/20761; B01D2255/20784; B01D2255/90; B01D2255/92; B01D2255/9205; B01D2255/9207; B01D53/9404; B01D53/9409; B01D53/9413; B01D53/9418; F01N3/30; F01N3/38; Y; Y02; Y02A; Y02A50/00; Y02A50/20; Y02P; Y02P20/00; Y02P20/50; Y02P20/52; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
106 words
SUPPORTED CATALYTIC COMPOSITION ADAPTED TO CATALYZE THE OXIDATION OF CARBON MONOXIDE AND HYDROCARBONS CONTAINED IN THE EXHAUST GASES OF AN INTERNAL COMBUSTION ENGINE, COMPRISING: A. A CARRIER CONSISTUTED BY GAMMA-ALUMINA HAVING A SPHEROIDAL SHAPE, HIGH PORSITY BETWEEN 0.5 AND 1.0 CC/G, A HIGH SPECIFIC AREA BETWEEN 150 AND 350 M2.G, HIGH MECHANICAL RESISTANCE AND LOW MASS SPECIFIC GRAVITY; AND B. AN ACTIVE PART CONSISTUTED BY A CATALYSTIC COMPOSITION SELECTED FROM THE GROUP CONSISTING OF MEMBERS REPRESENTED BY THE FORMULAE: CU NI1.4CR3O(6.9)W; CU MN CR3O(7.5)W; AND CU MN1-2CO1-6 (4.5-14)W. WHEREIN W IS THE INDEX FOR THE QUANTITY OF OXYGEN REQUIRED TO SATISFY THE VALENCES OF THE METALS.
Claim 2
Dependent Claim
106 words
SUPPORTED CATALYTIC COMPOSITION ADAPTED TO CATALYZE THE OXIDATION OF CARBON MONOXIDE AND HYDROCARBONS CONTAINED IN THE EXHAUST GASES OF AN INTERNAL COMBUSTION ENGINE, COMPRISING: A. A CARRIER CONSISTUTED BY GAMMA-ALUMINA HAVING A SPHEROIDAL SHAPE, HIGH PORSITY BETWEEN 0.5 AND 1.0 CC/G, A HIGH SPECIFIC AREA BETWEEN 150 AND 350 M2.G, HIGH MECHANICAL RESISTANCE AND LOW MASS SPECIFIC GRAVITY; AND B. AN ACTIVE PART CONSISTUTED BY A CATALYSTIC COMPOSITION SELECTED FROM THE GROUP CONSISTING OF MEMBERS REPRESENTED BY THE FORMULAE: CU NI1.4CR3O(6.9)W; CU MN CR3O(7.5)W; AND CU MN1-2CO1-6 (4.5-14)W. WHEREIN W IS THE INDEX FOR THE QUANTITY OF OXYGEN REQUIRED TO SATISFY THE VALENCES OF THE METALS.
Claim 3
Dependent Claim
53 words
Supported catalytic composition adapted to catalyze the oxidation of exhaust gases of an internal combustion engine according to claim 1 wherein the carrier before the treatment with the active part was subjected to a pre-impregnation with solutions of salts of metals selected from the bivalent metals Ni, Cu, Co and Mn, and chromium.
Claim 4
Dependent Claim
34 words
Catalytic composition, adapted to catalyze the oxidation of carbon monoxide and hydrocarbons contained in the exhaust gases of an internal combustion engine, selected from the group consisting of members represented by the following formulae:
Claim 5
Dependent Claim
34 words
Catalytic composition, adapted to catalyze the oxidation of carbon monoxide and hydrocarbons contained in the exhaust gases of an internal combustion engine, selected from the group consisting of members represented by the following formulae:
Claim 6
Dependent Claim
32 words
Catalytic composition according to claim 3 wherein the member represented by the formula Cu Mn1 2Co1 60(4.514)w is selected from the area a b c d of FIG. 1 of the drawing.
Claim 7
Dependent Claim
121 words
Process for the preparation of a catalytic composition according to claim 3 comprising: a. the preparation of an aqueous solution of salts of metals selected from nickel, cobalt, copper, manganese and chromium said compounds being capable of supplying oxides upon thermal decomposition and being present in the solution in quantities adapted to obtain the ratio for the metals set forth in the formula tHerefor; b. removing then from the solution the solvent, separating in this way a solid residue; c. isolating from the solid residue the catalytic composition corresponding to the formula therefor for the removal after thermal decomposition of the elements different from oxygen and the metals; d. calcining then the compounds of the metals as obtained according to c).
Claim 8
Dependent Claim
84 words
Process according to claim 5 wherein the solvent is water and the salts of the metals are selected respectively from the acetates and nitrates of chronium and nitrates of cooper and nickel; the removal of the water taking place through the heating to a temperature between 80* and 120*C; the removal of nitrogen oxides taking place also by means of heating to a temperature of about 250*C and the operation of calcination at the end being carried out at temperatures between 500* and 800*C.
Claim 9
Dependent Claim
21 words
Process according to claim 6 wherein the metal salts are selected from the acetates and nitrates of copper, manganese and chromium.
Claim 10
Dependent Claim
19 words
Process according to claim 6 wherein the metal salts are selected from the nitrates of cobalt, manganese and copper.
Claim 11
Dependent Claim
82 words
Process for the preparation of supported catalytic compositions according to claim 1 comprising; a. preparing an aqueous solution of the salts of the metals in such ratios as to supply the quantities thereof set forth in the formula therefor; b. impregnating with the solution according to a) a carrier constituted by gamma-alumina of spheroidal shape, with a high porosity, large surface area and high mechanical properties; c. calcining the carrier so impregnated at temperatures lower than the sintering temperature of the carrier.
Claim 12
Dependent Claim
147 words
Process for preparing a supported catalytic composition according to claim 7 comprising: a. preparing an aqueous solution of the metal salts in such quantities as to obtain the ratio set forth in the formula therefor; b. pre-impregnating the carrier constituted by gamma-alumina of a spheroidal shape, with high porosity, a large surface area and high mechanical properties, with a solution of a salt selected from those of the bivalent metals Ni, Cu, Coo and Mn, and of chromium; c. drying the pre-impregnated carrier obtained according to b); d. calcining the carrier obtained according to c) at temperatures lower than the sintering temperature of the carrier. e. treating the carrier obtained according to d) with a solution obtained according to a); f. drying the carrier obtained according to e); g. calcining the carrier obtained according to f) at temperatures lower than the sintering temperature of the carrier itself.
Claim 13
Dependent Claim
29 words
Process according to claim 10 wherein the solvent used for the states 1) and b) is water, the stages of drying taking place at temperatures between 80* and 120*C.
Claim 14
Dependent Claim
46 words
Process according to claim 11 wherein the pre-impregnation takes place with a solution of a compound of copper, nickel, manganese, or chromium and the impregnation takes place with a solution of compounds of chromium, copper, manganese or a solution of compounds of chromium, copper and nickel.
Claim 15
Dependent Claim
34 words
Process according to claim 11 wherein the pre-impregnation takes place with solutions of compounds of cobalt and/or copper and the solution of impregnation is a solution of the compounds of cobalt, manganese and copper.
References Cited (Backward Citations)
US2025140A
Cited
US2031475A
Cited
US2071119A
Cited
US3133029A
Cited
US3259453A
Cited
US3295918A
Cited
US3397154A
Cited
US3669906A
Cited
US3493325A
Cited
US3737396A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-29 | 1979-06-30 | 1979-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-29 | 1983-06-30 | 1983-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-29 | 1987-06-30 | 1987-12-30 | $7700.00 | Window Closed / Lapsed |