Patent US4192770A successfully refreshed from Google Patents.
US4192770A
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Cracking catalyst restoration with boron compounds
Assignee: Shell USA Inc
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Filing: 1978-05-24
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Granted: 1980-03-11
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Expires: 1998-05-24
Abstract
Abstract A process for restoring selectivity of cracking catalysts which are contaminated with metals during cracking operations which comprises contacting the catalyst with at least one boron compound for a time sufficient to restore selectivity of the catalyst.
Inventors
- 👤 David M. Singleton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:03
CPC Classifications
C; C10; C10G; C10G11/00; C10G11/02; C10G11/04; C10G11/05; B; B01; B01J; B01J29/00; B01J29/90; Y; Y10; Y10S; Y10S502/00; Y10S502/521
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
70 words
A process for restoring the selectivity of a zeolite-containing cracking catalyst which has become contaminated with at least one metal from the group consisting of nickel, vanadium and iron which comprises contacting said catalyst with a sole treating agent consisting essentially of at least one boron compound for a time sufficient to apply less than 1%w of boron to the cracking catalyst and to restore the selectivity of said catalyst.
Claim 2
Dependent Claim
70 words
A process for restoring the selectivity of a zeolite-containing cracking catalyst which has become contaminated with at least one metal from the group consisting of nickel, vanadium and iron which comprises contacting said catalyst with a sole treating agent consisting essentially of at least one boron compound for a time sufficient to apply less than 1%w of boron to the cracking catalyst and to restore the selectivity of said catalyst.
Claim 3
Dependent Claim
43 words
A process as in claim 1 wherein said catalyst is contacted with said boron compound to deposit on said catalyst an amount of boron in the range from about 0.05 to about 2 moles per mole of contaminating metal present on said catalyst.
Claim 4
Dependent Claim
30 words
A process as in claim 1 wherein said boron compound is mixed with a hydrocarbon oil feed and then charged to a catalytic cracking zone along with said cracking catalyst.
Claim 5
Dependent Claim
26 words
A process as in claim 1 wherein said boron compound is contacted with said catalyst by impregnating said catalyst with a solution of said boron compound.
Claim 6
Dependent Claim
14 words
A process as in claim 1 wherein said boron compound is an inorganic compound.
Claim 7
Dependent Claim
15 words
A process as in claim 1 wherein said boron compound is an organic boron compound.
Claim 8
Dependent Claim
31 words
A process as in claim 1 wherein said cracking catalyst is first contacted with said boron compound and then is heated in the presence of free oxygen to regenerate said catalyst.
Claim 9
Dependent Claim
36 words
A process as in claim 7 wherein said catalyst is heated to a temperature in the range from about 800° to about 1600° F. for a period of time from about 0.05 to about 30 hours.
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) | 1983-03-11 | 1983-09-10 | 1984-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-03-11 | 1987-09-10 | 1988-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-03-11 | 1991-09-10 | 1992-03-11 | $7700.00 | Window Closed / Lapsed |