US3893947A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Group VI-B metal catalyst preparation
Assignee: Union Oil Company of California
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Filing: 1973-09-10
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Granted: 1975-07-08
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Expires: 1993-09-10
Abstract
Abstract Catalytic combinations of refractory oxides and molybdenum and/or tungsten useful for hydrocarbon conversion and having modified porosity, permeability and/or surface characteristics are prepared by oxidizing a particle-form combination of a refractory oxide, a combustible support modifier and a Group VI-B metal compound in which less than 20 percent of the metal is hexavalent, by heating the particle-form combination in an oxidizing atmosphere at a temperature sufficient to convert the modifier to volatile oxidation products and remove it from the structure.
Inventors
- 👤 Dean Arthur Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:15
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J23/88; B01J23/883; B01J23/882; B01J37/00; B01J37/0009; B01J37/0018
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
131 words
A METHOD FOR PRODUCING A PARTICLE-FROM CATALYST CONSISTING ESSENTIALLY OF A REFRACTORY INORGANIC OXIDE SUPPORT AND A HYDROGENATION COMPONENT, SAID HYDROGENATING COMPONENT CONSISTING ESSENTIALLY OF AT LEAST ONE GROUP V1-B METAL CONSTITUENT SELECTED FROM THE GROUP CONSISTING OF MOLYBDENUM, TUNGSTEN AND CATALYTICALLT ACTIVE COMPOUNDS THEREOF, WHICH METHOD CONSISTS ESSENTIALLY OF FORMING A PARTICLE-FROM COMBINATION OF SAID REFRACTORY OXIDE SUPPORT, A COMBUSTIBLE SUPPORT MODIFIER AND AT LEAST ONE GROUP V1-B METAL COMPOUND SELECTED FROM THE GROUP CONSISTING OF THE OXIDES, SULFIDES AND THERMALLY DECOMPOSABLE COMPOUNDS OF MOLYBDENUM, TUNGSTEN, OR MIXTURE THEREOF WHEREIN AT LEAST ABOUT 80% OF THE TOTAL MOLYBDENUM AND TUNGSTEN CONTENT IS IN VALENCE STATE BELOW 6, AND HEATING SAID COMBINATION IN AN OXIDIZING ATMOSPHERE TO A TEMPERATURE ABOVE ABOUT 600*F FOR A PERIOD SUFFICIENT TO OXIDIZE SAID SUPPORT MODIFIER.
Claim 2
Independent Claim
131 words
A METHOD FOR PRODUCING A PARTICLE-FROM CATALYST CONSISTING ESSENTIALLY OF A REFRACTORY INORGANIC OXIDE SUPPORT AND A HYDROGENATION COMPONENT, SAID HYDROGENATING COMPONENT CONSISTING ESSENTIALLY OF AT LEAST ONE GROUP V1-B METAL CONSTITUENT SELECTED FROM THE GROUP CONSISTING OF MOLYBDENUM, TUNGSTEN AND CATALYTICALLT ACTIVE COMPOUNDS THEREOF, WHICH METHOD CONSISTS ESSENTIALLY OF FORMING A PARTICLE-FROM COMBINATION OF SAID REFRACTORY OXIDE SUPPORT, A COMBUSTIBLE SUPPORT MODIFIER AND AT LEAST ONE GROUP V1-B METAL COMPOUND SELECTED FROM THE GROUP CONSISTING OF THE OXIDES, SULFIDES AND THERMALLY DECOMPOSABLE COMPOUNDS OF MOLYBDENUM, TUNGSTEN, OR MIXTURE THEREOF WHEREIN AT LEAST ABOUT 80% OF THE TOTAL MOLYBDENUM AND TUNGSTEN CONTENT IS IN VALENCE STATE BELOW 6, AND HEATING SAID COMBINATION IN AN OXIDIZING ATMOSPHERE TO A TEMPERATURE ABOVE ABOUT 600*F FOR A PERIOD SUFFICIENT TO OXIDIZE SAID SUPPORT MODIFIER.
Claim 3
Dependent Claim
32 words
The method of claim 1 wherein said combination contains at least about 1 weight percent of said support modifier and at least about 2 weight percent of Group VI-B metal oxide equivalent.
Claim 4
Dependent Claim
25 words
The method of claim 1 wherein said support modifier is selected from the group consisting of sulfur, carbon and natural and synthetic combustible organic polymers.
Claim 5
Dependent Claim
82 words
The method of claim 1 wherein said combination of said refractory oxide, said combustible support modifier and said Group VI-B metal compound iS obtained by reducing a reducible compound of molybdenum or tungsten selected from the group consisting of the oxides, sulfides and thermally decomposable compounds thereof under conditions sufficient to reduce the relative concentration of hexavalent molybdenum or tungsten to less than about 10 percent of the total Group VI-B metal content of said combination prior to oxidizing said support modifier.
Claim 6
Dependent Claim
123 words
The method of claim 1 wherein said combination of refractory oxide, combustible support modifier and Group VI-B metal compound is obtained by forming a mixture of said refractory oxide, support modifier and a reducible Group VI-B metal compound selected from the group consisting of the oxides, sulfides and thermally decomposable compounds of hexavalent molybdenum or tungsten, reducing said Group VI-B metal compound under conditions sufficient to reduce the relative concentration of hexavalent molybdenum or tungsten to less than about 10 percent of the total Group VI-B metal content of said combination, and oxidizing said support modifier in an oxidizing atmosphere at a temperature of at least about 600*F sufficient to combust said modifier and oxidatively convert the same into volatile oxidation products thereof.
Claim 7
Dependent Claim
49 words
The method of claim 5 wherein said Group VI-B compound is ammonium molybdate, said support modifier is selected from the group consisting of polyglycols and sulfur, and said Group VI-B compound is reduced by reacting with a reducing agent selected from the group consisting of hydrazine and hydrogen sulfide.
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) | 1978-07-07 | 1979-01-06 | 1979-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-07 | 1983-01-06 | 1983-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-07 | 1987-01-06 | 1987-07-08 | $7700.00 | Window Closed / Lapsed |