US4166806A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cracking catalyst passivated with a crude antimony phosphorodithioate
Assignee: Phillips Petroleum Co
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Filing: 1978-07-25
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Granted: 1979-09-04
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Expires: 1998-07-25
Abstract
Abstract A hydrocarbon cracking catalyst is treated with a crude antimony tris-(O,O-dihydrocarbyl phosphorodithioate) to passivate thereon contaminating metals, e.g., vanadium, iron and/or nickel. Used or unused catalyst can be treated.
Inventors
- 👤 Dwight L. McKay
- 👤 Brent J. Bertus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:31
CPC Classifications
C; C10; C10G; C10G11/00; C10G11/02; C10G11/04
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
31 words
A cracking catalyst suitable for cracking a hydrocarbon which has been treated to passivate a contaminating metal whenever it appears thereon by incorporating with said catalyst, a crude antimony tris(O,O-dihydrocarbyl phosphorodithioate).
Claim 2
Dependent Claim
31 words
A cracking catalyst suitable for cracking a hydrocarbon which has been treated to passivate a contaminating metal whenever it appears thereon by incorporating with said catalyst, a crude antimony tris(O,O-dihydrocarbyl phosphorodithioate).
Claim 3
Dependent Claim
42 words
A catalyst according to claim 1 wherein the antimony compound is represented by the formula [(RO) 2 PS 2 ] 3 Sb, wherein the R groups, which can be different, are hydrocarbyl radicals, each containing from 1 to about 18 carbon atoms.
Claim 4
Dependent Claim
69 words
A cracking catalyst according to claim 1 wherein the antimony compound is at least one compound selected from the compounds following: antimony tris(O,O-dimethyl phosphorodithioate), antimony tris(O,O-diethyl phosphorodithioate), antimony tris(O,O-dipropyl phosphorodithioate), antimony tris(O,O-diisobutyl phosphorodithioate), antimony tris(O,O-dihexyl phosphorodithioate), antimony tris[O,O-bis(2-ethyloctyl) phosphorodithioate], antimony tris(O,O-dipentadecyl phosphorodithioate), antimony tris(O-octadecyl O-cyclohexyl phosphorodithioate), antimony tris(O,O-dicylohexyl phosphorodithioate), antimony tris[O,O-bis(3-methylcyclopentyl) phosphorodithioate], antimony tris[O,O-bis(cyclopentylmethyl) phosphorodithioate], antimony tris(O,O-diphenyl phosphorodithioate), antimony tris(O,O-di-p-tolyl phosphorodithioate), antimony tris(O,O-dibenzyl phosphorodithioate), and antimony tris(O-butyl O-phenyl phosphorodithioate).
Claim 5
Dependent Claim
15 words
A catalyst according to claim 1 wherein the antimony compound is crude antimony tris(O,O-dipropyl phosphorodithioate).
References Cited (Backward Citations)
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US3711422A
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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) | 1982-09-03 | 1983-03-05 | 1983-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-09-03 | 1987-03-05 | 1987-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-09-03 | 1991-03-05 | 1991-09-04 | $7700.00 | Window Closed / Lapsed |