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US4483765A
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Oil-dispersible antimony oxide sol dispersed as an oil in water emulsion into a cracking feed
Assignee: Nalco Exxon Energy Chemicals LP
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Filing: 1983-06-27
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Granted: 1984-11-20
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Expires: 2003-06-27
Abstract
Abstract It is now known that molecular sieve cracking catalysts used in fluid catalytic cracking units which have been contaminated with such metals as vanadium and nickel can be restored by contacting such contaminated catalysts with antimony-containing compounds and then subsequently subjecting the thus-treated catalysts to elevated temperatures and an oxygen-containing gas whereby revitalization is achieved. The above process can be improved by using as a source of antimony oxide an oil-in-water emulsion of an aqueous antimony sol.
Inventors
- 👤 Charles C. Payne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:01
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/90; C; C10; C10G; C10G11/00; C10G11/02; C10G11/04; C10G11/05; C10G11/14; C10G11/18; C10G11/187; Y; Y10; Y10S; Y10S502/00; Y10S502/521
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
In a process wherein the activity of metal contaminated molecular sieve cracking catalysts contained in a fluid catalytic cracking unit are restored by treating these catalysts with an activity improving amount of antimony oxide which is added to a hydrocarbon stream fed to the fluid catalytic cracking unit and then heating the thus treated catalyst in the presence of a free oxygen containing gas to an elevated temperature whereby the activity of the catalyst is improved, the improvement which comprises using as the source of antimony oxide an oil-in-water emulsion of an aqueous antimony sol which has been uniformly dispersed into a hydrocarbon stream feed to the catalytic cracking unit.
Claim 2
Dependent Claim
110 words
In a process wherein the activity of metal contaminated molecular sieve cracking catalysts contained in a fluid catalytic cracking unit are restored by treating these catalysts with an activity improving amount of antimony oxide which is added to a hydrocarbon stream fed to the fluid catalytic cracking unit and then heating the thus treated catalyst in the presence of a free oxygen containing gas to an elevated temperature whereby the activity of the catalyst is improved, the improvement which comprises using as the source of antimony oxide an oil-in-water emulsion of an aqueous antimony sol which has been uniformly dispersed into a hydrocarbon stream feed to the catalytic cracking unit.
References Cited (Backward Citations)
US4022710A
Cited
US4036740A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-11-20 | 1988-05-21 | 1988-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-11-20 | 1992-05-21 | 1992-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-11-20 | 1996-05-21 | 1996-11-20 | $7700.00 | Window Closed / Lapsed |