Patent US4794099A successfully refreshed from Google Patents.
US4794099A
Expired / Lapsed
US
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SiO2 -promoted cobalt catalyst on a support of TiO2 for converting synthesis gas to heavy hydrocarbons
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1987-01-28
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Granted: 1988-12-27
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Expires: 2007-01-28
Abstract
Abstract An improved hydrocarbon synthesis catalyst is prepared incorporating limited amounts of silica or a silica precursor to a catalyst comprising cobalt or an inorganic refractory support comprised primarily of titania.
Inventors
- 👤 Enrique Iglesia
- 👤 Stuart Soled
- 👤 Rocco A. Fiato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:39
CPC Classifications
C; C07; C07C; C07C1/00; C07C1/02; C07C1/04; C07C1/0425; C07C1/043; C07C1/0435; B; B01; B01J; B01J23/00; B01J23/70; B01J23/74; B01J23/75; B01J23/76; B01J23/84; B01J23/889; B01J23/8896; C07C2521/00; C07C2521/06; C07C2521/08; C07C2523/00; C07C2523/70; C07C2523/74; C07C2523/75
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
48 words
A hydrocarbon synthesis catalyst comprising cobalt in a catalytically active amount composited with an inorganic refractory support comprised of a major portion of titania to which a lesser portion up to about 15 wt.% of silica in the form of silica or a silica precursor has been added.
Claim 2
Dependent Claim
48 words
A hydrocarbon synthesis catalyst comprising cobalt in a catalytically active amount composited with an inorganic refractory support comprised of a major portion of titania to which a lesser portion up to about 15 wt.% of silica in the form of silica or a silica precursor has been added.
Claim 3
Dependent Claim
36 words
The catalyst of claim 1 wherein the silica is present in an amount sufficient to increase the site time yield in a hydrocarbon synthesis process over the site time yield obtained for that catalyst without silica.
Claim 4
Dependent Claim
13 words
The catalyst of claim 2 wherein rhenium is present in catalytically active amounts.
Claim 5
Dependent Claim
45 words
In a process for preparing a hydrocarbon synthesis catalyst comprising catalytically active amounts of cobalt on a support comprised primarily of titania, the improvement which comprises adding to the support up to about 15 wt.% silica in the form of silica or a silica precursor.
Claim 6
Dependent Claim
45 words
In a process for preparing a hydrocarbon synthesis catalyst comprising catalytically active amounts of cobalt on a support comprised primarily of titania, the improvement which comprises adding to the support up to about 15 wt.% silica in the form of silica or a silica precursor.
Claim 7
Dependent Claim
16 words
The catalyst of claim 1 wherein the titania has a rutile:anatase ratio of at least 2:3.
Claim 8
Dependent Claim
11 words
The catalyst of claim 1 wherein the titania is 100% rutile.
Claim 9
Dependent Claim
22 words
The process of claim 4 wherein the silica or silica precursor is added to the support prior to incorporation of the cobalt.
Claim 10
Dependent Claim
22 words
The process of claim 4 wherein the silica or silica precursor is added to the support subsequent to incorporation of the cobalt.
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) | 1991-12-27 | 1992-06-27 | 1992-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-12-27 | 1996-06-27 | 1996-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-12-27 | 2000-06-27 | 2000-12-27 | $7700.00 | Window Closed / Lapsed |