US4238362A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Passivation of metals contaminating a used cracking catalyst with certain antimony carbonates and their thio analogues
Assignee: Phillips Petroleum Co
•
Filing: 1978-07-25
•
Granted: 1980-12-09
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Expires: 1998-07-25
Abstract
Abstract A used cracking catalyst is treated with antimony carbonate and its thio analogues to passivate contaminating metals whenever these metals have been deposited on the catalyst.
Inventors
- 👤 Brent J. Bertus
- 👤 Dwight L. McKay
- 👤 H. Wayne Mark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:47
CPC Classifications
C; C10; C10G; C10G11/00; C10G11/02; B; B01; B01J; B01J21/00; B01J21/20; Y; Y10; Y10S; Y10S502/00; Y10S502/521
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
23 words
A cracking catalyst composition comprising a used cracking catalyst having thereon a modifying amount of a treating agent which comprises an antimony carbonate.
Claim 2
Dependent Claim
23 words
A cracking catalyst composition comprising a used cracking catalyst having thereon a modifying amount of a treating agent which comprises an antimony carbonate.
Claim 3
Dependent Claim
37 words
A catalyst according to claim 1 wherein the antimony compound is one having the formula (RXCXX) 3 Sb, wherein each X is independently selected from oxygen and sulfur, and R contains not more than 18 carbon atoms.
Claim 4
Dependent Claim
14 words
A composition according to claim 1 wherein the antimony compound is antimony tris(O-n-propyl dithiocarbonate).
Claim 5
Dependent Claim
44 words
A hydrocarbon cracking catalyst composition comprising incorporated with a used cracking catalyst at least one compound selected from the following: antimony tris(propylcarbonate), antimony tris(O-propylthiocarbonate), antimony tris(O-propyldithiocarbonate), antimony tris(S-propyl dithiocarbonate), antimony tris(S-propyl trithiocarbonate), antimony tris(ethyl carbonate), antimony tris(benzylcarbonate), antimony tris(O-octadecylthiocarbonate), and the thio analogues thereof.
Claim 6
Dependent Claim
44 words
A hydrocarbon cracking catalyst composition comprising incorporated with a used cracking catalyst at least one compound selected from the following: antimony tris(propylcarbonate), antimony tris(O-propylthiocarbonate), antimony tris(O-propyldithiocarbonate), antimony tris(S-propyl dithiocarbonate), antimony tris(S-propyl trithiocarbonate), antimony tris(ethyl carbonate), antimony tris(benzylcarbonate), antimony tris(O-octadecylthiocarbonate), and the thio analogues thereof.
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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) | 1983-12-09 | 1984-06-09 | 1984-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-09 | 1988-06-09 | 1988-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-09 | 1992-06-09 | 1992-12-09 | $7700.00 | Window Closed / Lapsed |