US4178267A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Passivating metals on cracking catalysts
Assignee: Phillips Petroleum Co
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Filing: 1978-12-15
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Granted: 1979-12-11
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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
2026-11-06 13:43
CPC Classifications
B; B01; B01J; B01J27/00; B01J27/02; B01J27/057; B01J27/0573; B01J21/00; B01J21/20; B01J23/00; B01J23/16; B01J23/18; C; C10; C10G; C10G11/00; C10G11/02; C10G11/04; Y; Y10; Y10S; Y10S502/00; Y10S502/521
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
62 words
A process for passivating metals selected from the group consisting of nickel, iron and vanadium on a catalyst consisting essentially of a clay based cracking catalyst comprising contacting the clay based cracking catalyst with at least one passivating compound selected from the group consisting of antimony selenide, antimony sulfide, antimony sulfate, bismuth selenide, bismuth sulfide and bismuth phosphate under elevated temperature conditions.
Claim 2
Dependent Claim
62 words
A process for passivating metals selected from the group consisting of nickel, iron and vanadium on a catalyst consisting essentially of a clay based cracking catalyst comprising contacting the clay based cracking catalyst with at least one passivating compound selected from the group consisting of antimony selenide, antimony sulfide, antimony sulfate, bismuth selenide, bismuth sulfide and bismuth phosphate under elevated temperature conditions.
Claim 3
Dependent Claim
52 words
A process in accordance with claim 1 comprising contacting said clay based cracking catalyst with said passivating compound in an amount sufficient to deposit on said catalyst from about 0.05 to about 5 weight percent of antimony or respectively bismuth, said percentage being based on the weight of the clay based catalyst.
Claim 4
Dependent Claim
37 words
A process in accordance with claim 1 wherein said clay based cracking catalyst is contacted with said passivating compound at a temperature in the range of about 800° F. (427° C.) to about 1500° F. (816° C.).
Claim 5
Dependent Claim
22 words
A process in accordance with claim 3 wherein said clay based cracking catalyst is contacted with said passivating compound under reducing conditions.
Claim 6
Dependent Claim
26 words
A process in accordance with claim 3 wherein said clay based cracking catalyst is contacted with said passivating compound in the presence of a hydrogen-containing medium.
Claim 7
Dependent Claim
39 words
A process in accordance with claim 1 wherein said clay based cracking catalyst is contacted with said passivating compound having a particle size such as to pass through a screen of at least about 150 mesh (Tyler Standard Screen).
Claim 8
Dependent Claim
38 words
A process in accordance with claim 4 wherein the clay based cracking catalyst prior to being contacted with the passivating compound has a deactivating amount of one or more of the metals nickel, iron and vanadium deposited thereon.
Claim 9
Dependent Claim
26 words
A process according to claim 1 wherein said passivating compound is selected from the group consisting of antimony selenide, antimony sulfide, antimony sulfate and bismuth phosphate.
Claim 10
Dependent Claim
14 words
A process in accordance with claim 1 wherein said passivating compound is antimony selenide.
Claim 11
Dependent Claim
31 words
A process in accordance with claim 9 wherein the clay based cracking catalyst and the antimony selenide are intimately mixed with each other and subjected to high temperature and reducing conditions.
Claim 12
Dependent Claim
14 words
A process in accordance with claim 1 wherein said passivating compound is antimony sulfide.
Claim 13
Dependent Claim
14 words
A process in accordance with claim 1 wherein said passivating compound is antimony sulfate.
Claim 14
Dependent Claim
14 words
A process in accordance with claim 1 wherein said passivating compound is bismuth selenide.
Claim 15
Dependent Claim
14 words
A process in accordance with claim 1 wherein said passivating compound is bismuth sulfide.
Claim 16
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) | 1982-12-10 | 1983-06-11 | 1983-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-10 | 1987-06-11 | 1987-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-10 | 1991-06-11 | 1991-12-11 | $7700.00 | Window Closed / Lapsed |