US4279735A
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: 1980-04-25
•
Granted: 1981-07-21
•
Expires: 2000-04-25
Abstract
Abstract A used hydrocarbon cracking catalyst is treated with an antimony carbonate to passivate contaminating metals thereon, e.g., vanadium, iron and/or nickel. A process for cracking a hydrocarbon in the presence of the passivated catalyst is also disclosed.
Inventors
- 👤 Brent J. Bertus
- 👤 Dwight L. McKay
- 👤 H. Wayne Mark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:56
CPC Classifications
C; C10; C10G; C10G11/00; C10G11/02; B; B01; B01J; B01J21/00; B01J21/20; B01J29/00; B01J29/90; Y; Y10; Y10S; Y10S502/00; Y10S502/521
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
53 words
A method for passivating a used hydrocarbon cracking catalyst which comprises adding to said used catalyst at least one antimony carbonate wherein the carbonate is at least 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 2
Independent Claim
53 words
A method for passivating a used hydrocarbon cracking catalyst which comprises adding to said used catalyst at least one antimony carbonate wherein the carbonate is at least 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 3
Dependent Claim
20 words
A method according to claim 1 wherein the cracking catalyst contains at least one of silica, silica-alumina and a zeolite.
Claim 4
Dependent Claim
27 words
A method according to claim 1 wherein the catalyst is treated to passivate at least one of nickel, iron and/or vanadium, whenever it appears on the catalyst.
Claim 5
Dependent Claim
65 words
A process for cracking a hydrocarbon feedstock which comprises contacting the same under cracking conditions with a used cracking catalyst which has been modified with a modifying amount of a treating agent selected from at least one of an antimony carbonate in an amount sufficient to passivate metals which tend to inactivate said used catalyst for effective cracking when said metals are on said catalyst.
Claim 6
Dependent Claim
65 words
A process for cracking a hydrocarbon feedstock which comprises contacting the same under cracking conditions with a used cracking catalyst which has been modified with a modifying amount of a treating agent selected from at least one of an antimony carbonate in an amount sufficient to passivate metals which tend to inactivate said used catalyst for effective cracking when said metals are on said catalyst.
Claim 7
Dependent Claim
45 words
A method according to claim 1 wherein the antimony carbonate is at least one carbonate selected from the following antimony tris(propylcarbonate), antimony tris(O-propyl thiocarbonate), antimony tris(O-propyl dithiocarbonate), 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 8
Dependent Claim
26 words
A process for cracking a hydrocarbon in the presence of a hydrocarbon cracking catalyst which has been treated by at least one carbonate of claim 5.
Claim 9
Dependent Claim
14 words
A method according to claim 1 wherein the antimony carbonate is antimony tris(O-n-propyl dithiocarbonate).
Claim 10
Dependent Claim
14 words
A process according to claim 4 wherein the antimony carbonate is antimony tris(O-n-propyl dithiocarbonate).
References Cited (Backward Citations)
CA729167A
Cited
US2129693A
Cited
US3711422A
Cited
US4025458A
Cited
US4031002A
Cited
US3979472A
Cited
US4036740A
Cited
US4083807A
Cited
US4111845A
Cited
US4153536A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-07-20 | 1985-01-19 | 1985-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-07-20 | 1989-01-19 | 1989-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-07-20 | 1993-01-19 | 1993-07-21 | $7700.00 | Window Closed / Lapsed |