US4238367A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Passivation of metals on cracking catalyst with thallium
Assignee: Phillips Petroleum Co
•
Filing: 1978-10-06
•
Granted: 1980-12-09
•
Expires: 1998-10-06
Abstract
Abstract A hydrocarbon cracking catalyst is treated with thallium to passivate thereon contaminating metals, e.g., vanadium, iron and/or nickel. Used or unused catalysts can be treated.
Inventors
- 👤 Brent J. Bertus
- 👤 Dwight L. McKay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:50
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/08; B01J29/00; B01J29/04; B01J29/06; B01J29/061; C; C10; C10G; C10G11/00; C10G11/02; C10G11/04; Y; Y10; Y10S; Y10S502/00; Y10S502/521
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
29 words
A method for passivating a contaminating metal upon a hydrocarbon cracking catalyst containing zeolite which comprises contacting said catalyst with a thallium supplying material to add the same thereto.
Claim 2
Independent Claim
29 words
A method for passivating a contaminating metal upon a hydrocarbon cracking catalyst containing zeolite which comprises contacting said catalyst with a thallium supplying material to add the same thereto.
Claim 3
Dependent Claim
14 words
A method according to claim 1 wherein the thallium supplying material is thallous sulfate.
Claim 4
Dependent Claim
32 words
A cracking catalyst containing zeolite suitable for cracking hydrocarbon having a contaminating metal thereon and having been treated to passivate said contaminating metal by incorporating with said catalyst a thallium supplying material.
Claim 5
Dependent Claim
32 words
A cracking catalyst containing zeolite suitable for cracking hydrocarbon having a contaminating metal thereon and having been treated to passivate said contaminating metal by incorporating with said catalyst a thallium supplying material.
Claim 6
Dependent Claim
14 words
A catalyst according to claim 3 wherein the thallium supplying material is thallous sulfate.
Claim 7
Dependent Claim
19 words
A method according to claim 1 wherein the contaminating metal is at least one of iron, nickel and/or vanadium.
Claim 8
Dependent Claim
14 words
A method according to claim 5 wherein the thallium is supplied by thallous sulfate.
References Cited (Backward Citations)
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Cited
US4025458A
Cited
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US4067823A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-12-09 | 1984-06-09 | 1984-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-09 | 1988-06-09 | 1988-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-09 | 1992-06-09 | 1992-12-09 | $7700.00 | Window Closed / Lapsed |