US3904553A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermally stable composite base metal oxide catalysts
Assignee: Corning Glass Works
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Filing: 1973-08-20
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Granted: 1975-09-09
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Expires: 1993-08-20
Abstract
Abstract A composite base metal oxide catalyst of improved high temperature stability is provided by prereacting a selected base metal oxide catalyst or its precursor compounds with a selected refractory high-surface-area spinel or its precursor compounds to form a crystalline solid solution of the catalyst and the spinel. This solid solution has the properties of good catalytic activity and high temperature structural and surface area stability. An example of such a composite catalyst is CuCr2O4 in solid solution with NiAl2O4.
Inventors
- 👤 Larry E Campbell
- 👤 Robert L Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:18
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/92; B01D53/94; B01D53/9445; B01D53/945; B01J; B01J23/00; B01J23/005; B01J37/00; B01J37/08; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
88 words
A PROCESS OF STABILIZING A BASE METAL OXIDE CATALYST OF SPINEL STRUCTURE SELECTED FROM THE GROUP CONSISTING OF CO3O4 COFE2O4, COMN2O4, CUCR2O4, CUFE2O4, CUMN2O4, CUCO2O4 AND ZNCO2O4 AGAINST HIGH TEMPERATURE DEGRADATION WHICH COMPRISES REACTING SAID CATALYST PRIOR TO USE WITH A REFRACTORY HIGH-SURFACE-AREA SPINEL SELECTED FROM THE GROUP CONSISTING OF NIAL2O4, MGAL2O4, ZNAL2O4, COAL2O4, CUAL2O4, CDAL2O4, MNAL2O4, NICR2O4, COCR2O4 AND MGCR2O4 TO PROVIDE STABLE COMPOSITE CATALYST MATERIAL COMPRISING A SOLID SOLUTION WHICH CONSISTS ESSENTIALLY OF SAID BASE METAL OXIDE CATALYST IN SOLID SOLUTION WITH SAID REFRACTORY HIGH-SURFACE-AREA SPINEL.
Claim 2
Dependent Claim
88 words
A PROCESS OF STABILIZING A BASE METAL OXIDE CATALYST OF SPINEL STRUCTURE SELECTED FROM THE GROUP CONSISTING OF CO3O4 COFE2O4, COMN2O4, CUCR2O4, CUFE2O4, CUMN2O4, CUCO2O4 AND ZNCO2O4 AGAINST HIGH TEMPERATURE DEGRADATION WHICH COMPRISES REACTING SAID CATALYST PRIOR TO USE WITH A REFRACTORY HIGH-SURFACE-AREA SPINEL SELECTED FROM THE GROUP CONSISTING OF NIAL2O4, MGAL2O4, ZNAL2O4, COAL2O4, CUAL2O4, CDAL2O4, MNAL2O4, NICR2O4, COCR2O4 AND MGCR2O4 TO PROVIDE STABLE COMPOSITE CATALYST MATERIAL COMPRISING A SOLID SOLUTION WHICH CONSISTS ESSENTIALLY OF SAID BASE METAL OXIDE CATALYST IN SOLID SOLUTION WITH SAID REFRACTORY HIGH-SURFACE-AREA SPINEL.
Claim 3
Dependent Claim
61 words
A process according to claim 1 wherein said catalyst is reacted with said high-surface-area spinel by heating a mixture consisting essentially of said catalyst or precursor compounds thereof and said high-surface-area spinal or precursor compounds thereof at a temperature in the range of about 400*-800*C. for a time sufficient to achieve some solid solution of said catalyst in said high-surface-area spinel.
Claim 4
Dependent Claim
34 words
A process according to claim 2 wherein said mixture consists essentially of precursor compounds selected from the group consisting of the hydrous oxides of the metallic components of said catalyst and said high-surface-area spinel.
Claim 5
Dependent Claim
78 words
A THERMALLY STABLE COMPOSITE CATALYST COMPRISING A SOLID SOLUTION WHICH CONSISTS ESSENTIALLY OF AT LEAST ONE BASE METAL OXIDE CATALYST OF SPINEL STRUCTURE IN SOLID SOLUTION WITH AT LEA ST ONE REFRACTORY HIGH-SURFACE-AREA SPINEL, SAID BASE METAL OXIDE CATALYST BEING SELECTED FROM THE GROUP CONSISTING OF CO3O4, COFE2O4, COMN2O4, CUCR2O4, CUFE2O4, CUMN2O4, CUCO2O4, AND ZNCO2O4, AND SAID REFRACTORY HIGH-SURFACE-AREA SPINEL BEING SELECTED FROM THE GROUP CONSISTING OF NIAL2O4, MGAL2O4, ZNAL2O4, COAL2O4, CUAL2O4, CDAL2O4, MNAL2O4, NICR2O4, COCR2O4, AND MGCR2O4.
Claim 6
Dependent Claim
78 words
A THERMALLY STABLE COMPOSITE CATALYST COMPRISING A SOLID SOLUTION WHICH CONSISTS ESSENTIALLY OF AT LEAST ONE BASE METAL OXIDE CATALYST OF SPINEL STRUCTURE IN SOLID SOLUTION WITH AT LEA ST ONE REFRACTORY HIGH-SURFACE-AREA SPINEL, SAID BASE METAL OXIDE CATALYST BEING SELECTED FROM THE GROUP CONSISTING OF CO3O4, COFE2O4, COMN2O4, CUCR2O4, CUFE2O4, CUMN2O4, CUCO2O4, AND ZNCO2O4, AND SAID REFRACTORY HIGH-SURFACE-AREA SPINEL BEING SELECTED FROM THE GROUP CONSISTING OF NIAL2O4, MGAL2O4, ZNAL2O4, COAL2O4, CUAL2O4, CDAL2O4, MNAL2O4, NICR2O4, COCR2O4, AND MGCR2O4.
Claim 7
Dependent Claim
16 words
A thermally stable composite catalyst according to claim 4 wherein the refractory high-surface-area spinel is ZnAl2O4.
Claim 8
Dependent Claim
38 words
A thermally stable composite catalyst according to claim 4 wherein the refractory high-surface-area spinel is NiAl2O4, and wherein the base metal oxide catalyst is selected from the group consisting of Co3O4, CoFe2O4, CuCr2O4, CuFe2O4, CuMn2O4, CuCo2O4 and ZnCo2O4.
Claim 9
Dependent Claim
24 words
A thermally stable composite catalyst according to claim 4 wherein the refractory high-surface-area spinel is Mg2Al2O4 and the base metal oxide catalyst is CuFe2O4.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-08 | 1979-03-10 | 1979-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-08 | 1983-03-10 | 1983-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-08 | 1987-03-10 | 1987-09-09 | $7700.00 | Window Closed / Lapsed |