US4183803A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Passivating metals on cracking catalysts
Assignee: Phillips Petroleum Co
•
Filing: 1978-12-15
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Granted: 1980-01-15
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Expires: 1998-12-15
Abstract
Abstract Metals such as nickel, vanadium and iron contaminating a cracking catalyst are passivated by contacting the cracking catalyst under elevated temperature conditions with antimony selenide, antimony sulfide, antimony sulfate, bismuth selenide, bismuth sulfide, or bismuth phosphate.
Inventors
- 👤 Dwight L. McKay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:42
CPC Classifications
C; C10; C10G; C10G11/00; C10G11/02; C10G11/04; B; B01; B01J; B01J23/00; B01J23/16; B01J23/18; B01J27/00; B01J27/02; B01J27/057; B01J27/0573
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
59 words
A cracking process which comprises contacting under cracking conditions a hydrocarbon feedstock, a cracking catalyst and a modifying amount of at least one compound selected from the group consisting of antimony selenide, antimony sulfide, antimony sulfate, bismuth selenide, bismuth sulfide and bismuth phosphate to produce a cracked product and recovering said cracked product as the product of the process.
Claim 2
Dependent Claim
59 words
A cracking process which comprises contacting under cracking conditions a hydrocarbon feedstock, a cracking catalyst and a modifying amount of at least one compound selected from the group consisting of antimony selenide, antimony sulfide, antimony sulfate, bismuth selenide, bismuth sulfide and bismuth phosphate to produce a cracked product and recovering said cracked product as the product of the process.
Claim 3
Dependent Claim
27 words
A process in accordance with claim 1 wherein said cracking catalyst is contacted with said modifying amount of compound under elevated temperature conditions and under reducing conditions.
Claim 4
Dependent Claim
54 words
A process in accordance with claim 2 comprising contacting said cracking catalyst with a sufficient amount of said compound to add about 0.05 to about 5 weight percent of antimony or bismuth, respectively, to the cracking catalyst, said percent being based on the weight of the cracking catalyst prior to treatment with said compound.
Claim 5
Dependent Claim
27 words
A process in accordance with claim 2 wherein said cracking catalyst is contacted at a temperature in the range of about 800° F. to about 1500° F.
Claim 6
Dependent Claim
19 words
A process in accordance with claim 2 wherein said catalyst is contacted in the presence of a hydrogen-containing medium.
Claim 7
Dependent Claim
36 words
A process in accordance with claim 2 wherein the cracking catalyst has a deactivating amount of one or more of the metals nickel, iron and vanadium deposited thereon prior to being contacted with the passivating compound.
Claim 8
Dependent Claim
27 words
A process in accordance with claim 1 wherein said passivating compound is selected from the group consisting of antimony selenide, antimony sulfide, antimony sulfate and bismuth phosphate.
Claim 9
Dependent Claim
14 words
A process in accordance with claim 1 wherein said passivating compound is antimony selenide.
Claim 10
Dependent Claim
29 words
A process in accordance with claim 8 wherein the cracking catalyst and the antimony selenide are intimately mixed with each other and subjected to high temperature and reducing conditions.
Claim 11
Dependent Claim
49 words
A process in accordance with claim 1 wherein said cracking catalyst is regenerated in a regeneration zone with free oxygen-containing gas such as to burn off at least a portion of the coke deposited on said cracking catalyst and then reintroducing the thus regenerated catalyst into the cracking zone.
Claim 12
Dependent Claim
33 words
A process in accordance with claim 1 wherein said compound is added to the feedstock which is introduced into a cracking zone in which said hydrocarbon feedstock, cracking catalyst and compound are contacted.
Claim 13
Dependent Claim
14 words
A process in accordance with claim 1 wherein said passivating compound is antimony sulfide.
Claim 14
Dependent Claim
14 words
A process in accordance with claim 1 wherein said passivating compound is antimony sulfate.
Claim 15
Dependent Claim
14 words
A process in accordance with claim 1 wherein said passivating compound is bismuth selenide.
Claim 16
Dependent Claim
14 words
A process in accordance with claim 1 wherein said passivating compound is bismuth sulfide.
Claim 17
Dependent Claim
14 words
A process in accordance with claim 1 wherein said passivating compound is bismuth phosphate.
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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) | 1983-01-14 | 1983-07-16 | 1984-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-01-14 | 1987-07-16 | 1988-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-01-14 | 1991-07-16 | 1992-01-15 | $7700.00 | Window Closed / Lapsed |