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US4280929A
Expired / Lapsed
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Attrition resistant-higher active component fluid bed catalysts
Assignee: Standard Oil Co
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Filing: 1979-09-17
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Granted: 1981-07-28
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Expires: 1999-09-17
Abstract
Abstract A method for preparing attrition resistant, high percentage active component catalysts comprises using two types of silica, one of which is fumed silica, in a two stage catalyst preparation.
Inventors
- 👤 Wilfrid G. Shaw
- 👤 Christos Paparizos
- 👤 James L. Callahan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:51
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/16; B01J23/24; B01J23/28; C; C07; C07C; C07C45/00; C07C45/27; C07C45/32; C07C45/33; C07C45/34; C07C45/35
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
84 words
A process for preparing a supported solid oxide complex catalyst comprising the steps of: (a) adding fumed silica to a mixture containing one or more active components of the catalyst; (b) drying said mixture to form a dried first-stage mixture; (c) adding in solution a member having a surface area greater than 50 m 2 /g selected from the group of silica and a silica-containing compound other than fumed silica to said dried mixture of (b); (d) drying and calcining said mixture of (c).
Claim 2
Dependent Claim
84 words
A process for preparing a supported solid oxide complex catalyst comprising the steps of: (a) adding fumed silica to a mixture containing one or more active components of the catalyst; (b) drying said mixture to form a dried first-stage mixture; (c) adding in solution a member having a surface area greater than 50 m 2 /g selected from the group of silica and a silica-containing compound other than fumed silica to said dried mixture of (b); (d) drying and calcining said mixture of (c).
Claim 3
Dependent Claim
21 words
The process of claim 1 wherein the dryed first-stage mixture of step (b) is calcined at a temperature of 200-700° C.
Claim 4
Dependent Claim
20 words
The process of claim 1 wherein one or more active components are additionally added to the solution of step (c).
Claim 5
Dependent Claim
32 words
The process of claim 1 wherein the active components of step (a) are selected from the group consisting of oxides or reagents that form the oxide of molybdenum, bismuth-molybdenum, antimony-molybdenum and tellurium-molybdenum.
Claim 6
Dependent Claim
25 words
The process of claim 1 wherein the amount of fumed silica added in step (a) is 5-95% of the total silica content of the catalyst.
Claim 7
Dependent Claim
25 words
The process of claim 1 wherein the amount of fumed silica added in step (a) is 15-65% of the total silica content of the catalyst.
Claim 8
Dependent Claim
18 words
The process of claim 1 wherein the calcination of step (b) is at a temperature of 200-700° C.
Claim 9
Dependent Claim
86 words
A process for preparing a supported solid oxide complex catalyst comprising the steps of: (a) adding fumed silica to a mixture containing one or more active components of the catalyst; (b) drying and calcining said mixture to form a cal-cined first-stage mixture; (c) adding in solution a member having a surface area greater than 50 m 2 /g selected from the group of silica and a silica-containing compound other than fumed silica to said dried mixture of (b); (d) drying and calcining said mixture of (c).
Claim 10
Dependent Claim
86 words
A process for preparing a supported solid oxide complex catalyst comprising the steps of: (a) adding fumed silica to a mixture containing one or more active components of the catalyst; (b) drying and calcining said mixture to form a cal-cined first-stage mixture; (c) adding in solution a member having a surface area greater than 50 m 2 /g selected from the group of silica and a silica-containing compound other than fumed silica to said dried mixture of (b); (d) drying and calcining said mixture of (c).
Claim 11
Dependent Claim
32 words
The process of claim 8 wherein the active components of step (a) are selected from the group consisting of oxides or reagents that form the oxide of molybdenum, bismuth-molybdenum, antimony-molybdenum and tellurium-molybdenum.
Claim 12
Dependent Claim
25 words
The process of claim 8 wherein the amount of fumed silica added in step (a) is 5-95% of the total silica content of the catalyst.
Claim 13
Dependent Claim
25 words
The process of claim 8 wherein the amount of fumed silica added in step (a) is 15-65% of the total silica content of the catalyst.
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) | 1984-07-27 | 1985-01-26 | 1985-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-07-27 | 1989-01-26 | 1989-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-07-27 | 1993-01-26 | 1993-07-28 | $7700.00 | Window Closed / Lapsed |