Patent US4496665A successfully refreshed from Google Patents.
US4496665A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for cracking high-boiling hydrocarbons using continuous addition of acidity enhancing additives
Assignee: Ashland LLC
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Filing: 1983-03-11
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Granted: 1985-01-29
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Expires: 2003-03-11
Abstract
Abstract A process for economically converting carbo-metallic oils to lighter products. The carbo-metallic oils contain 650° F.+ material which is characterized by containing material which will not boil below about 1025° F., a carbon residue on pyrolysis of at least about 2, and a nickel plus vanadium content of at least about 4 parts per million. This process comprises adding an additive to the feedstock consisting of a compound containing titanium, zirconium, or aluminum so as to restore cracking activity of high metal contaminated and deactivated, zeolite containing catalysts, resulting from processing of these carbo-metallic oils.
Inventors
- 👤 William P. Hettinger, Jr.
- 👤 Stephen M. Kovach
- 👤 Hubert W. Beck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:59
CPC Classifications
C; C10; C10G; C10G11/00; C10G11/02; C10G11/04; C10G11/05; C10G11/14; C10G11/18
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
66 words
A process for enhancing activity of a cracking catalyst contaminated with heavy metals in the range of about 0.3 to about 3 percent by weight based on the weight of the catalyst comprising contacting said catalyst with a feedstock having heavy metals and high Conradson carbon precursor content and adding to said cracking catalyst continually a metal selected from the group consisting of titanium and zirconium.
Claim 2
Dependent Claim
66 words
A process for enhancing activity of a cracking catalyst contaminated with heavy metals in the range of about 0.3 to about 3 percent by weight based on the weight of the catalyst comprising contacting said catalyst with a feedstock having heavy metals and high Conradson carbon precursor content and adding to said cracking catalyst continually a metal selected from the group consisting of titanium and zirconium.
Claim 3
Dependent Claim
16 words
A process as described in claim 1 in which the additive is a compounds of titanium.
Claim 4
Dependent Claim
15 words
A process as described in claim 1 in which the additive is a zirconium compound.
Claim 5
Dependent Claim
24 words
A process as described in claim 1 in which the additive is added in the amount of 2 ppm or greater to the feedstock.
Claim 6
Dependent Claim
21 words
A process as described in claim 1 in which the additive is added in the amount of 100 ppm or greater.
Claim 7
Dependent Claim
21 words
A process as described in claim 1 in which the additive is added in the amount of 100 ppm or greater.
Claim 8
Dependent Claim
22 words
A process as described in claim 1 in which the additive is combined with the feedstock prior to introduction to the reactor.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-01-29 | 1988-07-30 | 1989-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-29 | 1992-07-30 | 1993-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-01-29 | 1996-07-30 | 1997-01-29 | $7700.00 | Window Closed / Lapsed |