US3928168A
Expired / Lapsed
US
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Oil and process of manufacture of blended hydrorefined oil
Assignee: Sunoco Inc R&M
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Filing: 1973-12-10
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Granted: 1975-12-23
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Expires: 1993-12-10
Abstract
Abstract A hydrocarbon fluid, useful as a textile lubricant or a coolant for a nuclear reactor or an electrical insulation medium (e.g., transformer oil) can be prepared from a severely hydrorefined oil having a viscosity from 30 to 500 SUS at 100*F. and an ultraviolet absorptivity of less than 0.04 in the 335 millimicron region by a process comprising increasing the content in the hydrorefined oil of polynuclear hydrocarbons having at least four condensed aromatic rings. When the severely hydrorefined oil has a VGC in the range of 0.82-0.92, the preferred 335 absorptivity of the blended product is in the range of 0.04 to 2.5. One preferred means of increasing the content of such polynuclear hydrocarbons having at least four condensed rings is to add to the severely hydrorefined oil a second oil (e.g., recycle stock from catalytic cracking of gas oil) which is rich in such polynuclear hydrocarbons.
Inventors
- 👤 Ivor W Mills
- 👤 Glenn R Dimeler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:17
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/20; H01B3/22; C; C09; C09K; C09K5/00; C09K5/08; C10; C10M; C10M101/00; D; D06; D06M; D06M7/00; C10G; C10G2400/00; C10G2400/12; C10M2203/00; C10M2203/10; C10M2203/1006; C10M2203/102; C10M2203/1025; C10M2203/104; C10M2203/1045; C10M2203/106; C10M2203/1065; C10M2203/108; C10M2203/1085; C10N; C10N2030/00; C10N2030/32; C10N2040/00; C10N2040/14; C10N2040/16; C10N2040/17; D06M2200/00; D06M2200/40
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
99 words
PROCESS FOR PREPARING A HYDROCARBON FLUID OF IMPROVED OXIDATION STABILITY FROM A SEVERELY HYDROREFINED OIL HAVING A VISCOSITY FROM 30 TO 500 SUS AT 100*F AND AN ULTRAVIOLET ABSORPTIVITY OF LESS THAN 0.04 IN THE 335 MILLIMICRON REGION, SAID PROCESS COMPRISING ADDING TO THE SEVERELY HYDROREFINED OIL AN UNREFINED DISTILLATE OF A RECYCLE STOCK OBTAINED FROM CATALYTIC CRACKING OF GAS OIL WHICH IS RICH IN POLYNUCLEAR HYDROCARBONS HAVING AT LEAST FOUR CONDENSED AROMATIC RINGS AND RECOVERING A BLENDED OIL HAVING AN ABSORPTIVITY AT 335 MILLIMICRONS AT LEAST 15% GREATER THAN THAT OF SAID HYDROREFINED OIL AND LESS THAN 2.5.
Claim 2
Dependent Claim
99 words
PROCESS FOR PREPARING A HYDROCARBON FLUID OF IMPROVED OXIDATION STABILITY FROM A SEVERELY HYDROREFINED OIL HAVING A VISCOSITY FROM 30 TO 500 SUS AT 100*F AND AN ULTRAVIOLET ABSORPTIVITY OF LESS THAN 0.04 IN THE 335 MILLIMICRON REGION, SAID PROCESS COMPRISING ADDING TO THE SEVERELY HYDROREFINED OIL AN UNREFINED DISTILLATE OF A RECYCLE STOCK OBTAINED FROM CATALYTIC CRACKING OF GAS OIL WHICH IS RICH IN POLYNUCLEAR HYDROCARBONS HAVING AT LEAST FOUR CONDENSED AROMATIC RINGS AND RECOVERING A BLENDED OIL HAVING AN ABSORPTIVITY AT 335 MILLIMICRONS AT LEAST 15% GREATER THAN THAT OF SAID HYDROREFINED OIL AND LESS THAN 2.5.
Claim 3
Dependent Claim
64 words
Process according to claim 1 wherein said hydrorefined oil has a sludge-free Doble life of less than 48 hours and the resulting blended oil has a 335 UVA in the range of 0.4-2.5 and is contacted with sufficient amount of an adsorbent to produce a hydrocarbon oil, useful as an electrical insulator oil, and having a sludge-free Doble life of at least 64 hours.
Claim 4
Dependent Claim
117 words
Process according to claim 2 wherein said hydrocarbon oil product is useful as a transformer oil and has a sludge-free Doble life of at least 100 hours with a total acid number less than .1, said oil having a viscosity at 100*F. in the range of 45-70 SUS, an ultraviolet absorptivity at 335 millimicrons in the range of 0.06-2.0, a sulfur content in the range of 25-800 p.p.m., and containing less than 25 p.p.m. of total nitrogen and less than 10 p.p.m. of basic nitrogen, the chemical composition of the hydrocarbons in said oil being such that the ratio of the ultraviolet absorptivity at 335 millimicrons to the absorptivity at 330 millimicrons is no less than 1.0.
Claim 5
Dependent Claim
43 words
A process according to claim 3 wherein said hydrocarbon oil has a sludge-free Doble life of at least 200 hours at a total acid number less than 0.01 and wherein said absorptivity at 335 millimicrons is in the range of 0.3 to 1.0.
Claim 6
Dependent Claim
29 words
Process according to claim 1 wherein the ultraviOlet absorptivity of said severely hydrorefined oil is determined for at least one wave length or band in the 320-340 millimicron region.
Claim 7
Dependent Claim
16 words
Process according to claim 5 wherein said wave length or band is at about 335 millimicrons.
Claim 8
Dependent Claim
124 words
Process for preparing a hydrocarbon fluid useful as an electrical insulation medium from a severely hydrorefined naphthenic oil having a sludge-free Doble life less than 48 hours and a viscosity from 40 to 200 SUS at 100*F and having an ultraviolet absorptivity of less than 0.04 in the 335 millimicron region, said process comprising adding to said hydrorefined oil an unrefined distillate of a recycle stock obtained from catalytic cracking of gas oil and, which is rich in polynuclear hydrocarbons having at least four condensed aromatic rings, until said abosrptivity at 335 millimicrons is from 0.04 to 2.5 and contacting the resulting oil with sufficient amount of an adsorbent to produce a transformer oil having a sludge-free Doble life of at least 64 hours.
Claim 9
Dependent Claim
124 words
Process for preparing a hydrocarbon fluid useful as an electrical insulation medium from a severely hydrorefined naphthenic oil having a sludge-free Doble life less than 48 hours and a viscosity from 40 to 200 SUS at 100*F and having an ultraviolet absorptivity of less than 0.04 in the 335 millimicron region, said process comprising adding to said hydrorefined oil an unrefined distillate of a recycle stock obtained from catalytic cracking of gas oil and, which is rich in polynuclear hydrocarbons having at least four condensed aromatic rings, until said abosrptivity at 335 millimicrons is from 0.04 to 2.5 and contacting the resulting oil with sufficient amount of an adsorbent to produce a transformer oil having a sludge-free Doble life of at least 64 hours.
Claim 10
Dependent Claim
16 words
Process according to claim 7 wherein said unrefined distillate boils mainly in the range of 600*-1000*F
Claim 11
Dependent Claim
16 words
Process according to claim 8 wherein said unrefined distillate boils mainly in the range of 650*-750*F.
Claim 12
Dependent Claim
118 words
Process according to claim 7 wherein the product of said contacting is an oil useful as a transformer oil and having a sludge-free Doble life of at least 100 hours with a total acid number less than 0.1, said product oil having a viscosity at 100*F. in the range of 50 to 65 SUS, an ultraviolet absorptivity at 335 millimicrons in the range of 0.06 to 2.0, a sulfur content in the range of 25 to 800 p.p.m. and containing less than 25 p.p.m. of nitrogen, the chemical composition of the hydrocarbons in said oil being such that the ratio of the ultraviolet absorptivity at 335 millimicrons to the absorptivity at 330 millimicrons is no less than 1.0.
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) | 1978-12-22 | 1979-06-23 | 1979-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-22 | 1983-06-23 | 1983-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-22 | 1987-06-23 | 1987-12-23 | $7700.00 | Window Closed / Lapsed |