US4452693A
Expired / Lapsed
US
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Process for increasing the activity of perovskite catalysts and hydrocarbon treating processes using the activated catalyst
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1983-06-24
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Granted: 1984-06-05
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Expires: 2003-06-24
Abstract
Abstract The activity of a fresh alkaline earth metal perovskite-containing catalyst can be increased by contacting the fresh catalyst with a reducing gas at reducing conditions prior to use. The activated catalyst is useful in hydrocarbon treating processes such as catalytic cracking and fluid coking.
Inventors
- 👤 Robert C. Schucker
- 👤 Kenneth S. Wheelock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:57
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/02; B01J23/04; B01J23/002; B01J2523/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
72 words
A hydrocarbon cracking process which comprises contacting a hydrocarbonaceous feed at hydrocarbon cracking conditions with a catalyst that has been activated by a process which comprises contacting a catalyst comprising a perovskite having at least one alkaline earth metal constituent selected from the group consisting of barium, beryllium, magnesium, calcium, strontium and mixtures thereof, with a reducing gas at reducing conditions for a time sufficient to increase the activity of said catalyst.
Claim 2
Dependent Claim
72 words
A hydrocarbon cracking process which comprises contacting a hydrocarbonaceous feed at hydrocarbon cracking conditions with a catalyst that has been activated by a process which comprises contacting a catalyst comprising a perovskite having at least one alkaline earth metal constituent selected from the group consisting of barium, beryllium, magnesium, calcium, strontium and mixtures thereof, with a reducing gas at reducing conditions for a time sufficient to increase the activity of said catalyst.
Claim 3
Dependent Claim
25 words
The hydrocarbon cracking process of claim 1, wherein said alkaline earth metal constituent is selected from the group consisting of barium, strontium and mixtures thereof.
Claim 4
Dependent Claim
28 words
The hydrocarbon cracking process of claim 1, wherein said perovskite is selected from the group consisting of barium zirconate, barium hafnate, strontium zirconate, strontium hafnate and mixtures thereof.
Claim 5
Dependent Claim
14 words
The hydrocarbon cracking process of claim 1, wherein said catalyst comprises a supported perovskite.
Claim 6
Dependent Claim
18 words
The hydrocarbon cracking process of claim 1, wherein said catalyst consists essentially of said perovskite without a support.
Claim 7
Dependent Claim
24 words
The hydrocarbon cracking process of claim 1, wherein said reducing gas is selected from the group consisting of hydrogen, carbon monoxide and mixtures thereof.
Claim 8
Dependent Claim
23 words
The hydrocarbon cracking process of claim 1, wherein said reducing conditions include a temperature ranging from about 400° C. to about 1000° C.
Claim 9
Dependent Claim
28 words
The hydrocarbon cracking process of claim 1, wherein said catalyst is contacted with said reducing gas for a period ranging from about 1 second to about 1 hour.
Claim 10
Dependent Claim
13 words
The process of claim 1 wherein said hydrocarbon cracking process is catalytic cracking.
Claim 11
Dependent Claim
15 words
The process of claim 1 wherein said hydrocarbon cracking process is a fluid coking process.
Claim 12
Dependent Claim
12 words
The process of claim 1 wherein said hydrocarbonaceous feed comprises metallic contaminants.
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) | 1987-06-05 | 1987-12-05 | 1988-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-06-05 | 1991-12-05 | 1992-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-06-05 | 1995-12-05 | 1996-06-05 | $7700.00 | Window Closed / Lapsed |