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US4520120A
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Vanadium passivation in a hydrocarbon catalytic cracking process
Assignee: Chevron USA Inc
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Filing: 1984-03-19
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Granted: 1985-05-28
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Expires: 2004-03-19
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
2026-10-28 17:48
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: 5
Claim 1
Independent Claim
53 words
A catalyst composition comprising a crystalline aluminosilicate zeolite, a matrix material, and from 5 to 40 weight percent, based on the total catalyst, of a calcium-containing non-perovskite additive selected from the group consisting of calcium-titanium, calcium-zirconium, calcium-titanium-zirconium oxides and mixtures thereof, said additive being present as a discrete component of said catalyst composition.
Claim 2
Dependent Claim
53 words
A catalyst composition comprising a crystalline aluminosilicate zeolite, a matrix material, and from 5 to 40 weight percent, based on the total catalyst, of a calcium-containing non-perovskite additive selected from the group consisting of calcium-titanium, calcium-zirconium, calcium-titanium-zirconium oxides and mixtures thereof, said additive being present as a discrete component of said catalyst composition.
Claim 3
Dependent Claim
53 words
A catalyst composition comprising a crystalline aluminosilicate zeolite, a matrix material and from 11 to 40 weight percent, based on the total catalyst, of a calcium-containing perovskite additive selected from the group consisting of calcium titanate, calcium zirconate and mixtures thereof, said additive being present as a discrete component of said catalyst composition.
Claim 4
Dependent Claim
53 words
A catalyst composition comprising a crystalline aluminosilicate zeolite, a matrix material and from 11 to 40 weight percent, based on the total catalyst, of a calcium-containing perovskite additive selected from the group consisting of calcium titanate, calcium zirconate and mixtures thereof, said additive being present as a discrete component of said catalyst composition.
Claim 5
Dependent Claim
27 words
The catalyst composition of claim 2 wherein the concentration of said perovskite is in the range of 12 to 20 weight percent, based on the total catalyst.
References Cited (Backward Citations)
GB1003266A
Cited
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Cited
US3928233A
Cited
US4107088A
Cited
US4179409A
Cited
US4432890A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-05-27 | 1988-11-26 | 1989-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-27 | 1992-11-26 | 1993-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-27 | 1996-11-26 | 1997-05-28 | $7700.00 | Window Closed / Lapsed |