Patent US4264433A successfully refreshed from Google Patents.
US4264433A
Expired / Lapsed
US
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Passivating metals on cracking catalysts by indium antimonide
Assignee: Phillips Petroleum Co
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Filing: 1979-12-11
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Granted: 1981-04-28
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Expires: 1999-12-11
Abstract
Abstract Contaminating metals on a clay based cracking catalyst are passivated by contacting the catalyst with indium antimonide under elevated temperature conditions.
Inventors
- 👤 Dwight L. McKay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:31
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/16; B01J23/18; C; C10; C10G; C10G11/00; C10G11/02; C10G11/04; Y; Y10; Y10S; Y10S502/00; Y10S502/515; Y10S502/516
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
66 words
In a process for catalytic cracking of a hydrocarbon feestock, comprising contacting said hydrocarbon feedstock in a cracking zone with a clay based cracking catalyst under cracking conditions, and withdrawing the cracked hydrocarbon feedstock from said cracking zone for further processing, the improvement which comprises contacting the cracking catalyst with indium antimonide under sufficiently high temperatures to passivate contaminating nickel, vanadium and iron on said catalyst.
Claim 2
Dependent Claim
66 words
In a process for catalytic cracking of a hydrocarbon feestock, comprising contacting said hydrocarbon feedstock in a cracking zone with a clay based cracking catalyst under cracking conditions, and withdrawing the cracked hydrocarbon feedstock from said cracking zone for further processing, the improvement which comprises contacting the cracking catalyst with indium antimonide under sufficiently high temperatures to passivate contaminating nickel, vanadium and iron on said catalyst.
Claim 3
Dependent Claim
41 words
A process in accordance with claim 1 wherein said cracking catalyst is contacted with indium antimonide in a quantity sufficient to deposit thereon about 0.005 to about 5 wt. % indium antimonide based on the original cracking catalyst plus indium antimonide.
Claim 4
Dependent Claim
75 words
A process in accordance with claim 1 comprising a. regenerating said cracking catalyst by continuously withdrawing the cracking catalyst from the cracking zone and introducing it into a regeneration zone, b. contacting the cracking catalyst in said regeneration zone with a free oxygen containing gas such as to burn off coke deposited on said cracking catalyst, and c. removing regenerated cracking catalyst from said regeneration zone and reintroducing this cracking catalyst into the cracking zone.
Claim 5
Dependent Claim
16 words
A process in accordance with claim 1 comprising adding the indium antimonide to the hydrocarbon feedstock.
References Cited (Backward Citations)
US2901419A
Cited
US3711422A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-04-27 | 1984-10-27 | 1985-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-04-27 | 1988-10-27 | 1989-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-04-27 | 1992-10-27 | 1993-04-28 | $7700.00 | Window Closed / Lapsed |