US3920540A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of treating oils to remove contaminants of sulfur nitrogen and color bodies
Assignee: Texaco Inc
•
Filing: 1973-04-03
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Granted: 1975-11-18
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Expires: 1993-04-03
Abstract
Abstract Treatment of oils with alumina on a metal support permits increase in viscosity index and decrease in color, basic nitrogen, and sulfur content.
Inventors
- 👤 Frederic C Mccoy
- 👤 John T Brandenburg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:04
CPC Classifications
C; C10; C10G; C10G25/00; C10G25/003
Claims Analysis
Total Claims: 34
Claim 1
Independent Claim
60 words
THE METHOD OF INCREASING THE VISCOSITY INDEX OF A CHARGE PETROLEUM LUBRICATING OIL WHICH COMPRISES PASSING SAID CHARGE PETROLEUM OIL AT 50*F-300*F INTO CONTACT WITH A FILM CONSISTING ESSENTIALLY OF ALUMINA ON A METALLICS STEEL WOOL SUPPORT WHEREBY AN IMPROVED PRODUCT OIL IS FORMED HAVING PRODUCT OIL OF INCREASED VISCOSITY INDEX; WINDRAWING SAID IMPROVED PRODUCT OIL OF INCRASED VISCOSITY INDEX.
Claim 2
Independent Claim
60 words
THE METHOD OF INCREASING THE VISCOSITY INDEX OF A CHARGE PETROLEUM LUBRICATING OIL WHICH COMPRISES PASSING SAID CHARGE PETROLEUM OIL AT 50*F-300*F INTO CONTACT WITH A FILM CONSISTING ESSENTIALLY OF ALUMINA ON A METALLICS STEEL WOOL SUPPORT WHEREBY AN IMPROVED PRODUCT OIL IS FORMED HAVING PRODUCT OIL OF INCREASED VISCOSITY INDEX; WINDRAWING SAID IMPROVED PRODUCT OIL OF INCRASED VISCOSITY INDEX.
Claim 3
Independent Claim
47 words
THE METHOD OF DESULFURIZING A CHARGE PERTOLEUM OIL WHICH COMPRISES PASSING SAID CHARGE PETROLEUM OIL AT 50*F-300*F INTO CONTACT WITH A FILM CONSISTING ESSENTIALLY OF ALUMINAA ON A METALLIC STEEL WOOL SUPPORT WHEREBY AN IMPROVED DESULFURIZED PRODUCT OIL IS FORMED; AND WINDRAWING SAID IMPROVED DESULFURIZED RODUCT OIL.
Claim 4
Independent Claim
47 words
THE METHOD OF DESULFURIZING A CHARGE PERTOLEUM OIL WHICH COMPRISES PASSING SAID CHARGE PETROLEUM OIL AT 50*F-300*F INTO CONTACT WITH A FILM CONSISTING ESSENTIALLY OF ALUMINAA ON A METALLIC STEEL WOOL SUPPORT WHEREBY AN IMPROVED DESULFURIZED PRODUCT OIL IS FORMED; AND WINDRAWING SAID IMPROVED DESULFURIZED RODUCT OIL.
Claim 5
Independent Claim
58 words
THE METHOD OF REMOVING NITROGEN COMPONENTS FROM A CGARGE PETROLEUM OIL WHICH COMPRISES. PASSING SAID CHARGE PETROLEUM OIL AT 50*F-300*F INTO CONTACT WITH A FILM CONSISTING ESSENTIALLY OF ALUMINA ON A METALLIC SUPPORT WHEREBY AN IMPROVED PRODUCT PERTOLEUM OIL IS FORMED CONTAINING REDUCED AMOUNTS OF NITROGEN: AND WINDRAWING SAID IMPROVED PRODUCT PETROLEUM OIL CONTAINING REDUCED AMOUNTS OF NITROGEN.
Claim 6
Independent Claim
58 words
THE METHOD OF REMOVING NITROGEN COMPONENTS FROM A CGARGE PETROLEUM OIL WHICH COMPRISES. PASSING SAID CHARGE PETROLEUM OIL AT 50*F-300*F INTO CONTACT WITH A FILM CONSISTING ESSENTIALLY OF ALUMINA ON A METALLIC SUPPORT WHEREBY AN IMPROVED PRODUCT PERTOLEUM OIL IS FORMED CONTAINING REDUCED AMOUNTS OF NITROGEN: AND WINDRAWING SAID IMPROVED PRODUCT PETROLEUM OIL CONTAINING REDUCED AMOUNTS OF NITROGEN.
Claim 7
Dependent Claim
26 words
The method of removing nitrogen components from a charge petroleum oil as claimed in claim 3 wherein said charge petroleum oil is a hydrocarbon fuel oil.
Claim 8
Dependent Claim
23 words
The method of removing nitrogen components from a charge petroleum oil as claimed in claim 3 wherein said support is a fibrous metal.
Claim 9
Dependent Claim
22 words
The method of removing nitrogen components from a charge petroleum oil as claimed in claim 3 wherein said support is steel wool.
Claim 10
Dependent Claim
25 words
the method of removing nitrogen components from a charge petroleum oil as claimed in claim 3 wherein said support includes short lengths of metal fibre.
Claim 11
Dependent Claim
31 words
The method of removing nitrogen components from a charge petroleum oil as claimed in claim 3 wherein said charge oil is diluted with inert diluent prior to contact with said alumina.
Claim 12
Dependent Claim
32 words
The method of removing nitrogen components from a charge petroleum oil as claimed in claim 3 wherein said metallic support and said alumina are maintained at temperature of 50*F-300*F by inductive heating.
Claim 13
Dependent Claim
46 words
The method of removing nitrogen components from a charge petroleum oil as claimed in claim 3 wherein, after said improved product petroleum oil containing reduced amounts of nitrogen is withdrawn, a regenerating solvent is passed into contact with said film of alumina thereby regenerating said film.
Claim 14
Dependent Claim
48 words
The method of removing nitrogen components from a charge petroleum oil as claimed in claim 3 wherein, after said improved product petroleum oil containing reduced amounts of nitrogen is withdrawn, said film of alumina on said metallic support is regenerated by heating said metallic support to regenerating temperature.
Claim 15
Independent Claim
68 words
The method of removing nitrogen components from a charge petroleum hydrocarbon fuel oil which comprises passing said charge petroleum hydrocarbon fuel oil at 50*F-300*F into contact with a film consisting essentially of alumina on a support of steel wool whereby an improved product petroleum hydrocarbon fuel oil is formed containing reduced amounts of nitrogen; and withdrawing said improved product petroleum hydrocarbon fuel oil containing reduced amounts of nitrogen.
Claim 16
Independent Claim
68 words
The method of removing nitrogen components from a charge petroleum hydrocarbon fuel oil which comprises passing said charge petroleum hydrocarbon fuel oil at 50*F-300*F into contact with a film consisting essentially of alumina on a support of steel wool whereby an improved product petroleum hydrocarbon fuel oil is formed containing reduced amounts of nitrogen; and withdrawing said improved product petroleum hydrocarbon fuel oil containing reduced amounts of nitrogen.
Claim 17
Independent Claim
56 words
The method of decolorizing a petroleum oil which comprises passing a charge petroleum oil at 50*F-300*F into contact with a film consisting essentially of alumina on a metallic support whereby an improved product petroleum oil is formed containing reduced amounts of color bodies; and withdrawing said improved product petroleum oil containing reduced amounts of color bodies.
Claim 18
Independent Claim
56 words
The method of decolorizing a petroleum oil which comprises passing a charge petroleum oil at 50*F-300*F into contact with a film consisting essentially of alumina on a metallic support whereby an improved product petroleum oil is formed containing reduced amounts of color bodies; and withdrawing said improved product petroleum oil containing reduced amounts of color bodies.
Claim 19
Dependent Claim
22 words
The method of decolorizing a petroleum oil as claimed in claim 13 wherein said charge petroleum oil is a hydrocarbon lubricating oil.
Claim 20
Dependent Claim
19 words
The method of decolorizing a petroleum oil as claimed in claim 13 wherein said support is a fibrous metal.
Claim 21
Dependent Claim
18 words
The method of decolorizing a petroleum oil as claimed in claim 13 wherein said support is steel wool.
Claim 22
Dependent Claim
21 words
The method of decolorizing a petroleum oil as claimed in claim 13 wherein said support includes short lengths of metal fibre.
Claim 23
Independent Claim
64 words
The method of decolorizing a petroleum lubricating oil which comprises diluting said petroleum lubricating oil with an inert diluent; passing said diluted charge petroleum lubricating oil at 50*F-300*F into contact with a film consisting essentially of alumina on a support of steel wool whereby a decolorized petroleum lubricating oil is formed containing reduced amounts of color bodies; and withdrawing said decolorized petroleum lubricating oil.
Claim 24
Independent Claim
64 words
The method of decolorizing a petroleum lubricating oil which comprises diluting said petroleum lubricating oil with an inert diluent; passing said diluted charge petroleum lubricating oil at 50*F-300*F into contact with a film consisting essentially of alumina on a support of steel wool whereby a decolorized petroleum lubricating oil is formed containing reduced amounts of color bodies; and withdrawing said decolorized petroleum lubricating oil.
Claim 25
Independent Claim
57 words
The method of incrEasing the viscosity index of a charge petroleum lubricating oil which comprises passing said charge petroleum oil at 50*F-300*F into contact with a film consisting essentially of alumina on a metallic support whereby an improved product oil is formed having an increasd viscosity index; and withdrawing said improved product oil of increased viscosity index.
Claim 26
Independent Claim
57 words
The method of incrEasing the viscosity index of a charge petroleum lubricating oil which comprises passing said charge petroleum oil at 50*F-300*F into contact with a film consisting essentially of alumina on a metallic support whereby an improved product oil is formed having an increasd viscosity index; and withdrawing said improved product oil of increased viscosity index.
Claim 27
Dependent Claim
25 words
The method of increasing the viscosity index of a charge petroleum lubricating oil as claimed in claim 19 wherein said support is a fibrous metal.
Claim 28
Dependent Claim
24 words
The method of increasing the viscosity index of a charge petroleum lubricating oil as claimed in claim 19 wherein said support is steel wool.
Claim 29
Dependent Claim
35 words
The method of increasing the viscosity index of a charge petroleum lubricating oil as claimed in claim 19 wherein said charge petroleum lubricating oil is diluted with inert diluent prior to contact with said alumina.
Claim 30
Independent Claim
45 words
The method of desulfurizing a charge petroleum oil which comprises passing said charge petroleum oil at 50*F-300*F into contact with a film consisting essentially of alumina on a metallic support whereby an improved desulfurized product oil is formed; and withdrawing said improved desulfurized product oil.
Claim 31
Independent Claim
45 words
The method of desulfurizing a charge petroleum oil which comprises passing said charge petroleum oil at 50*F-300*F into contact with a film consisting essentially of alumina on a metallic support whereby an improved desulfurized product oil is formed; and withdrawing said improved desulfurized product oil.
Claim 32
Dependent Claim
22 words
The method of desulfurizing a charge petroleum oil as claimed in claim 23 wherein said charge petroleum oil is a fuel oil.
Claim 33
Dependent Claim
19 words
The method of desulfurizing a charge petroleum oil as claimed in claim 23 wherein said support is steel wool.
Claim 34
Dependent Claim
29 words
The method of desulfurizing a charge petroleum oil as claimed in claim 23 wherein said charge petroleum oil is diluted with inert diluent prior to contact with said alumina.
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) | 1978-11-17 | 1979-05-19 | 1979-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-17 | 1983-05-19 | 1983-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-17 | 1987-05-19 | 1987-11-18 | $7700.00 | Window Closed / Lapsed |