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Patent US3673108A successfully refreshed from Google Patents.
US3673108A
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Hydrocracking catalyst activation treatment
Assignee: Shell USA Inc
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Filing: 1969-12-31
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Granted: 1972-06-27
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Expires: 1989-12-31
Abstract
Abstract A hydrocracking catalyst containing an Iron Group metal on a silica-aluming refractory oxide support is deactivated by contact with water vapor at elevated temperatures. The catalytic activity and stability are improved by treating the catalyst in the presence of sulfide with a gas comprising hydrogen and a fluorine compound at a temperature of about 250* to 550* C.
Inventors
- 👤 Hans U Schutt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:04
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J23/90; B01J23/94; B01J37/00; B01J37/22; B01J37/26; C; C10; C10G; C10G47/00; C10G47/02; C10G47/10; C10G47/12; Y; Y10; Y10S; Y10S502/00; Y10S502/515; Y10S502/517
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
15 words
The process of claim 1 wherein the catalyst also contains 1-15%wt group VI B metal.
Claim 2
Dependent Claim
11 words
The process of claim 1 wherein the fluorine compound is difluoroethane.
Claim 3
Dependent Claim
20 words
The process of claim 1 wherein the catalyst has been deactivated by contact with water vapor from an oxidative regeneration.
Claim 4
Dependent Claim
32 words
The process of claim 1 wherein a fresh catalyst has been deactivated by contact with a gas comprising hydrogen, a sulfur compound and water vapor at temperatures between 300* and 600* C.
Claim 5
Dependent Claim
29 words
The process of claim 1 wherein the catalyst comprises a refractory oxide consisting essentially of from about 70-90%w silica and 30-10%w alumina, from about 3-7%w nickel and 0.1-7%w fluoride.
Claim 6
Dependent Claim
12 words
The process of claim 6 wherein the catalyst also contains 1-15%w tungsten.
Claim 7
Dependent Claim
29 words
The process of claim 6 wherein the catalyst is sulfided and treated simultaneously with a gas consisting essentially of hydrogen, from about 0.1-20%v hydrogen sulfide and about 0.02%v difluoroethane.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |