US3617484A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Increasing the v.i. of hydrocracked light lubes
Assignee: Sunoco Inc
•
Filing: 1968-11-29
•
Granted: 1971-11-02
•
Expires: 1988-11-29
Abstract
Abstract A process for increasing the V.I. of a light lube fraction approximating the viscosity range of a 100 Neutral oil which has been hydrocracked as part of a relatively wide-range lube fraction wherein the light lube fraction is isolated and rehydrocracked in the absence of heavier fractions.
Inventors
- 👤 Sheldon L Thompson
- 👤 Albert T Olenzak
- 👤 Rene F Kress
- 👤 Ib Steinmetz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:36
CPC Classifications
C; C10; C10G; C10G65/00; C10G65/02; C10G65/10; C10G2400/00; C10G2400/10; Y; Y10; Y10S; Y10S208/00; Y10S208/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
44 words
The process of claim 1 wherein both hydrocracking steps are carried out in the presence of a catalyst which is a sulfactive metal of at least one member of the group consisting of Group VI b and Group VIII b of the periodic table.
Claim 2
Dependent Claim
43 words
The process of claim 2 wherein the oil boiling in the range of from about 700* to 800* F. is recovered from the second hydrocracking step in about a 75 percent yield as based on the oil charge to said second hydrocracking step.
Claim 3
Dependent Claim
34 words
The process of claim 3 wherein the catalyst in both hydrocracking steps is a combination of at least two members of the group consisting of nickel sulfide, tungsten sulfide, cobalt sulfide, and molybdenum sulfide.
Claim 4
Dependent Claim
37 words
The process of claim 4 wherein the catalyst in both hydrocracking steps is a combination of nickel sulfide and tungsten sulfide in a metal ratio of from 1:1 to 4:1 nickel: tungsten supported on an alumina carrier.
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) | 1974-11-01 | 1975-05-03 | 1975-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-01 | 1979-05-03 | 1979-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-01 | 1983-05-03 | 1983-11-02 | $7700.00 | Window Closed / Lapsed |