Patent US4283274A successfully refreshed from Google Patents.
US4283274A
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Process for cracking hydrocarbons with a cracking catalyst passivated with thallium
Assignee: Phillips Petroleum Co
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Filing: 1980-04-30
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Granted: 1981-08-11
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Expires: 2000-04-30
Abstract
Abstract A hydrocarbon cracking catalyst treated with thallium to passivate thereon contaminating metals, e.g., vanadium, iron and/or nickel is used in a process for cracking a hydrocarbon.
Inventors
- 👤 Brent J. Bertus
- 👤 Dwight L. McKay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:41
CPC Classifications
C; C10; C10G; C10G11/00; C10G11/02; C10G11/04; B; B01; B01J; B01J23/00; B01J23/08; B01J29/00; B01J29/04; B01J29/06; B01J29/061; C10G11/05
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
51 words
A process for cracking a hydrocarbon oil employing an oil cracking catalyst containing zeolite, the effectiveness of which can be reduced by contaminating metal deposits thereon resulting from said hydrocarbon oil which comprises passivating such metal on such catalyst whenever it appears by adding to said catalyst a thallium supplying material.
Claim 2
Dependent Claim
51 words
A process for cracking a hydrocarbon oil employing an oil cracking catalyst containing zeolite, the effectiveness of which can be reduced by contaminating metal deposits thereon resulting from said hydrocarbon oil which comprises passivating such metal on such catalyst whenever it appears by adding to said catalyst a thallium supplying material.
Claim 3
Dependent Claim
14 words
A process according to claim 1 wherein the thallium supplying material is thallous sulfate.
Claim 4
Dependent Claim
27 words
A process according to claim 1 wherein the contaminating metal is at least one of iron, nickel and/or vanadium and the thallium is supplied by thallous sulfate.
Claim 5
Dependent Claim
66 words
A process according to claim 1 wherein the contaminating metal in said hydrocarbon oil is at least one of iron, nickel and/or vanadium and the effectiveness of said catalyst, with respect to at least one of gasoline yield, coke yield or hydrogen yield, is impaired by said metal and wherein upon addition of the thallium to said catalyst the effectiveness of the catalyst is materially improved.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-08-10 | 1985-02-09 | 1985-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-10 | 1989-02-09 | 1989-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-10 | 1993-02-09 | 1993-08-11 | $7700.00 | Window Closed / Lapsed |