US4072603A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process to make technical white oils
Assignee: Sunoco Inc R&M
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Filing: 1976-10-29
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Granted: 1978-02-07
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Expires: 1996-10-29
Abstract
Abstract A process for making technical white oils in a single step hydrogenation and without the need for acid treating to meet white oil specification by hydrogenating a hydrocracked solvent extracted lubricating oil distilling between 650° and 1050° F., having a SUS/100° F. viscosity of about 200 and an aromatic content of less than about 15% in a single step at 600° to 700° F., and at 2000 to 3000 psig in the presence of a catalyst comprising nickel and tungsten supported on silica-alumina, subjecting the hydrogenated solvent extracted lube oil to atmospheric distillation to remove distillates useful as fuels and subjecting the bottoms of said atmospheric distillation to a vacuum distillation to yield various viscosity grades of technical white oils.
Inventors
- 👤 William W. Wentzheimer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:42
CPC Classifications
C; C10; C10G; C10G67/00; C10G67/02; C10G67/04; C10G67/0409; C10G67/0436; C10G2400/00; C10G2400/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
117 words
A process for making technical white oils in a single hydrogenation and without the need for acid treating to meet white oil specifications which comprises hydrogenating a hydrocracked solvent extracted lubricating oil distilling at 650° to 1050° F, having a SUS/100° F viscosity of about 200 and an aromatic content of less than about 15% in a single step at 600° to 700° F, and at 2000 to 3000 psig in the presence of a catalyst comprising nickel and tungsten supported on silica-alumina, subjecting the hydrogenated solvent lube oil to atmospheric distillation to remove distillates useful as fuels and subjecting the bottoms of said atmospheric distillation to a vacuum distillation to yield technical white oils as products.
Claim 2
Dependent Claim
117 words
A process for making technical white oils in a single hydrogenation and without the need for acid treating to meet white oil specifications which comprises hydrogenating a hydrocracked solvent extracted lubricating oil distilling at 650° to 1050° F, having a SUS/100° F viscosity of about 200 and an aromatic content of less than about 15% in a single step at 600° to 700° F, and at 2000 to 3000 psig in the presence of a catalyst comprising nickel and tungsten supported on silica-alumina, subjecting the hydrogenated solvent lube oil to atmospheric distillation to remove distillates useful as fuels and subjecting the bottoms of said atmospheric distillation to a vacuum distillation to yield technical white oils as products.
Claim 3
Dependent Claim
83 words
The process of claim 1 where the charge stock is a mixture of about 40% by volume of a furfural extracted dearomatized vacuum gas oil and about 60% of a virgin vacuum gas oil which is refined by hydrocracking into a lube quality oil having a high VI of about 95 to 105 and an aromatic content of about 10% to about 15% by volume, and the portion boiling above 650° F is solvent dewaxed and U.V. stabilized with a light furfural extraction.
Claim 4
Dependent Claim
65 words
The process of claim 1 where the charge stock is a 100% virgin vacuum gas oil which is refined by hydrocracking into a lube quality oil having a high VI of about 95 to 105 and an aromatic content of about 10% to about 15% by volume, and the portion boiling above 650° F is solvent dewaxed and U.V. stabilized with a light furfural extraction.
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) | 1981-02-06 | 1981-08-08 | 1982-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-06 | 1985-08-08 | 1986-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-06 | 1989-08-08 | 1990-02-07 | $7700.00 | Window Closed / Lapsed |