Patent US4208302A successfully refreshed from Google Patents.
US4208302A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Passivating metals on cracking catalysts
Assignee: Phillips Petroleum Co
•
Filing: 1978-10-06
•
Granted: 1980-06-17
•
Expires: 1998-10-06
Abstract
Abstract Contaminating metals on a clay based cracking catalyst are passivated by contacting the catalyst with indium antimonide under elevated temperature conditions.
Inventors
- 👤 Dwight L. McKay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:40
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/16; B01J23/18; C; C10; C10G; C10G11/00; C10G11/02; C10G11/04; Y; Y10; Y10S; Y10S502/00; Y10S502/522
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
47 words
A process for passivating a metal selected from the group consisting of nickel, vanadium and iron on a clay based cracking catalyst which comprises contacting the contaminated clay based cracking catalyst having said metal thereon with indium antimonide under elevated temperature conditions sufficient to passivate said metal.
Claim 2
Dependent Claim
47 words
A process for passivating a metal selected from the group consisting of nickel, vanadium and iron on a clay based cracking catalyst which comprises contacting the contaminated clay based cracking catalyst having said metal thereon with indium antimonide under elevated temperature conditions sufficient to passivate said metal.
Claim 3
Dependent Claim
57 words
A process in accordance with claim 1 wherein said clay based cracking catalyst is contacted with a sufficient quantity of indium antimonide such as to deposit about 0.005 to about 5 tw. % of indium antimonide on said clay based cracking catalyst, said weight percentage being based on the weight of the cracking catalyst plus indium antimonide.
Claim 4
Dependent Claim
27 words
A process in accordance with claim 1 wherein said indium antimonide has a particle size that it passes through Tyler Standard Screen of at least 150 mesh.
Claim 5
Dependent Claim
34 words
A process in accordance with claim 1 wherein said clay based cracking catalyst in contact with said indium antimonide is heated to a temperature in the range of about 800° to about 1500° F.
Claim 6
Dependent Claim
22 words
A process in accordance with claim 4 wherein said clay based cracking catalyst is contacted with said indium antimonide under reducing conditions.
Claim 7
Dependent Claim
23 words
A process in accordance with claim 4 wherein said contaminated clay based cracking catalyst is contacted with said indium antimonide under oxidizing conditions.
Claim 8
Dependent Claim
52 words
A process in accordance with claim 5 wherein said clay based cracking catalyst and said indium antimonide in finely divided powder form are contacted with each other at a temperature of about 800° to about 1500° F. while the mixture of the two is being fluidized by a free hydrogen comprising fluid.
Claim 9
Dependent Claim
17 words
A catalyst obtained by contacting a clay based cracking catalyst with indium antimonide under elevated temperature conditions.
Claim 10
Dependent Claim
17 words
A catalyst obtained by contacting a clay based cracking catalyst with indium antimonide under elevated temperature conditions.
Claim 11
Dependent Claim
31 words
A catalyst in accordance with claim 8 obtained by reacting 0.005 to 5 wt. % of indium antimonide based on the weight of the catalyst with said clay based cracking catalyst.
Claim 12
Dependent Claim
29 words
A catalyst in accordance with claim 8 obtained by contacting a clay based cracking catalyst with finely divided indium antimonide at a temperature of 800° to about 1500° F.
Claim 13
Dependent Claim
23 words
A catalyst in accordance with claim 10 wherein said clay based cracking catalyst has been contacted with said indium antimonide under reducing conditions.
References Cited (Backward Citations)
US2901419A
Cited
US3711422A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-06-17 | 1983-12-17 | 1984-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-06-17 | 1987-12-17 | 1988-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-06-17 | 1991-12-17 | 1992-06-17 | $7700.00 | Window Closed / Lapsed |