US4141858A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Passivating metals on cracking catalysts
Assignee: Phillips Petroleum Co
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Filing: 1977-07-26
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Granted: 1979-02-27
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Expires: 1997-07-26
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 05:40
CPC Classifications
B; B01; B01J; B01J27/00; B01J27/02; B01J27/053; B01J23/00; B01J23/16; B01J23/18; B01J27/04; B01J27/057; B01J27/0573; C; C10; C10G; C10G11/00; C10G11/02; C10G11/04
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
41 words
A modified cracking catalyst obtained by contacting a clay based cracking catalyst and 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
41 words
A modified cracking catalyst obtained by contacting a clay based cracking catalyst and 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
63 words
A catalyst in accordance with claim 1 obtained by contacting the clay based cracking catalyst with said passivating compound in an amount such as to add about 0.05 to about 5 weight percent antimony or bismuth, respectively, to the clay based cracking catalyst, said percent being based on the weight of the clay based cracking catalyst prior to treatment with the passivating compound.
Claim 4
Dependent Claim
35 words
A catalyst in accordance with claim 2 obtained by contacting the clay based cracking catalyst with antimony selenide at temperatures in the range of about 800° F to about 1500° F and under reducing conditions.
Claim 5
Dependent Claim
42 words
A catalyst in accordance with claim 2 obtained by contacting the clay based cracking catalyst on which a deactivating amount of at least one metal selected from the group consisting of nickel, iron and vanadium has been deposited with the passivating compound.
Claim 6
Dependent Claim
33 words
A catalyst in accordance with claim 2 obtained by contacting said clay based cracking catalyst with a compound selected from the group consisting an antimony selenide, antimony sulfide, antimony sulfate and bismuth phosphate.
Claim 7
Dependent Claim
18 words
A catalyst in accordance with claim 2 obtained by contacting said clay based cracking catalyst with antimony selenide.
Claim 8
Dependent Claim
27 words
A catalyst in accordance with claim 4 obtained by contacting and treating clay based catalyst and said compound under elevated temperature conditions in the presence of hydrogen.
Claim 9
Dependent Claim
27 words
A catalyst in accordance with claim 3 obtained by contacting a mixture of said clay based cracking catalyst and antimony selenide with hydrogen in the cracking zone.
Claim 10
Dependent Claim
17 words
A catalyst in accordance with claim 8 obtained by adding the antimony selenide to the hydrocarbon feedstock.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-02-26 | 1982-08-28 | 1983-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-26 | 1986-08-28 | 1987-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-26 | 1990-08-28 | 1991-02-27 | $7700.00 | Window Closed / Lapsed |