Patent US4451355A successfully refreshed from Google Patents.
US4451355A
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Vanadium passivation in a hydrocarbon catalytic cracking process
Assignee: Chevron USA Inc
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Filing: 1983-09-28
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Granted: 1984-05-29
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Expires: 2003-09-28
Abstract
Abstract Hydrocarbons containing vanadium are converted to lower boiling fractions employing a zeolitic cracking catalyst containing a significant concentration of a calcium-containing additive as a vanadium passivating agent.
Inventors
- 👤 Bruce R. Mitchell
- 👤 Roger F. Vogel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:24
CPC Classifications
C; C10; C10G; C10G11/00; C10G11/02; C10G11/04; C10G11/05; C10G2300/00; C10G2300/70; C10G2300/705; Y; Y10; Y10S; Y10S502/00; Y10S502/521; Y10S502/525
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
49 words
A process for the conversion of a hydrocarbon oil feed having a significant concentration of vanadium to lighter oil products which comprises contacting said feed under conversion conditions with a cracking catalyst containing a calcium-containing additive selected from the group consisting of calcium-titanium, calcium-zirconium, calcium-titanium-zirconium oxides and mixtures thereof.
Claim 2
Dependent Claim
49 words
A process for the conversion of a hydrocarbon oil feed having a significant concentration of vanadium to lighter oil products which comprises contacting said feed under conversion conditions with a cracking catalyst containing a calcium-containing additive selected from the group consisting of calcium-titanium, calcium-zirconium, calcium-titanium-zirconium oxides and mixtures thereof.
Claim 3
Dependent Claim
18 words
The process of claim 1 wherein the concentration of vanadium in said feed is at least 1.5 ppm.
Claim 4
Dependent Claim
18 words
The process of claim 1 wherein the concentration of vanadium in said catalyst is at least 4000 ppm.
Claim 5
Dependent Claim
16 words
The process of claim 1 wherein the concentration of vanadium on said catalyst exceeds 30,000 ppm.
Claim 6
Dependent Claim
14 words
The process of claim 1 wherein said catalyst includes a catalytically inert porous material.
Claim 7
Dependent Claim
26 words
The process of claim 1 wherein said calcium-containing additive comprises a perovskite selected from the group consisting of calcium titanate and calcium zirconate and mixtures thereof.
Claim 8
Dependent Claim
26 words
The process of claim 6 wherein the concentration of said perovskite is in the range of 5 to 40 weight percent based on the total catalyst.
Claim 9
Dependent Claim
26 words
The process of claim 6 wherein the concentration of said perovskite is in the range of 11 to 40 weight percent based on the total catalyst.
References Cited (Backward Citations)
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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) | 1987-05-29 | 1987-11-28 | 1988-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-29 | 1991-11-28 | 1992-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-29 | 1995-11-28 | 1996-05-29 | $7700.00 | Window Closed / Lapsed |