US4148714A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metals passivation with catalyst fines
Assignee: Phillips Petroleum Co
•
Filing: 1978-06-30
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Granted: 1979-04-10
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Expires: 1998-06-30
Abstract
Abstract Used cracking catalyst fines from a cracking process wherein antimony or a compound thereof is used as a metals passivation agent are used as an efficient passivation agent in a cracking process.
Inventors
- 👤 Richard H. Nielsen
- 👤 Dwight L. McKay
- 👤 Glenn H. Dale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:11
CPC Classifications
C; C10; C10G; C10G11/00; C10G11/02; C10G11/04
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
51 words
A process for passivating metals in a catalytic cracking process that is carried out essentially in the absence of added hydrogen by contacting a metals containing hydrocarbon feedstock under cracking conditions with a cracking catalyst in the presence of an added passivating agent consisting essentially of used antimony-containing cracking catalyst fines.
Claim 2
Dependent Claim
51 words
A process for passivating metals in a catalytic cracking process that is carried out essentially in the absence of added hydrogen by contacting a metals containing hydrocarbon feedstock under cracking conditions with a cracking catalyst in the presence of an added passivating agent consisting essentially of used antimony-containing cracking catalyst fines.
Claim 3
Dependent Claim
52 words
A process in accordance with claim 1 comprising contacting said hydrocarbon feedstock simultaneously with said cracking catalyst and with used antimony-containing cracking catalyst fines obtained and separated from a hydrocarbon catalytic cracking process in which antimony or antimony compounds are used to mitigate the detrimental effect of metals in this cracking process.
Claim 4
Dependent Claim
27 words
A process in accordance with claim 1 wherein said used catalyst fines are those that have been removed from said cracking process with the cracked hydrocarbon product.
Claim 5
Dependent Claim
22 words
A process in accordance with claim 1 wherein said catalyst fines have an antimony content of about 0.4 to 10 wt. %.
Claim 6
Dependent Claim
27 words
A process in accordance with claim 1 wherein said catalyst fines have a particle size to pass essentially completely through a sieve of 325 mesh (U.S. Sieve).
Claim 7
Dependent Claim
15 words
A process in accordance with claim 2 wherein said Sb compound is antimony tris(O,O-dihydrocarbyl dithiophosphate).
Claim 8
Dependent Claim
50 words
A process for passivating metals in a catalytic cracking process by contacting a metals-containing hydrocarbon feedstock under cracking conditions with a cracking catalyst in the presence of added passivating agent comprising Sb-containing used cracking catalyst fines from a cracking process wherein an organic Sb thiophosphate is employed as passivating agent.
Claim 9
Dependent Claim
50 words
A process for passivating metals in a catalytic cracking process by contacting a metals-containing hydrocarbon feedstock under cracking conditions with a cracking catalyst in the presence of added passivating agent comprising Sb-containing used cracking catalyst fines from a cracking process wherein an organic Sb thiophosphate is employed as passivating agent.
Claim 10
Dependent Claim
15 words
A process in accordance with claim 7 wherein the Sb compound is antimony tris(O,O-dihydrocarbyl dithiophosphate).
Claim 11
Dependent Claim
78 words
A process for passivating metals in a catalytic cracking process by contacting a metals-containing hydrocarbon feedstock under cracking conditions with a cracking catalyst in the presence of an added passivating agent consisting essentially of used antimony containing cracking catalyst fines wherein the used antimony containing cracking catalyst fines are obtained by withdrawing said fines from a hydrocarbon catalytic cracking process in which organic antimony compounds are used to mitigate the detrimental effect of metals in the cracking process.
Claim 12
Dependent Claim
78 words
A process for passivating metals in a catalytic cracking process by contacting a metals-containing hydrocarbon feedstock under cracking conditions with a cracking catalyst in the presence of an added passivating agent consisting essentially of used antimony containing cracking catalyst fines wherein the used antimony containing cracking catalyst fines are obtained by withdrawing said fines from a hydrocarbon catalytic cracking process in which organic antimony compounds are used to mitigate the detrimental effect of metals in the cracking process.
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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) | 1982-04-09 | 1982-10-09 | 1983-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-09 | 1986-10-09 | 1987-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-09 | 1990-10-09 | 1991-04-10 | $7700.00 | Window Closed / Lapsed |