Patent US1485886A successfully refreshed from Google Patents.
Patent US4021334A successfully refreshed from Google Patents.
US4021334A
Expired / Lapsed
US
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Process for manufacture of stabilized lubricating oil with elemental sulfur
Assignee: Mobil Oil AS
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Filing: 1976-06-08
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Granted: 1977-05-03
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Expires: 1996-06-08
Abstract
Abstract A stabilized lubricating oil resistant to oxidation and sludge formation upon exposure to an oxidative environment is prepared without forming undesirable color bodies therein by the steps (1) contacting the lubricating oil stock with a small amount of added elemental sulfur of from about 0.05 to about 1.0 percent by weight at a contact temperature of from about 25 DEG C. to about 130 DEG C. and (2) contacting the product of step (1) with hydrogen in the presence of alumina impregnated with at least about 10 weight percent MoO3 and at least about 2.5 weight percent CoO to remove any unreacted added elemental sulfur therefrom. The impregnated alumina catalyst of step (2) must have at least 50 percent of the pores with a pore diameter of 50 Angstrom Units or more.
Inventors
- 👤 Robert L. Gorring
- 👤 Eric J. Y. Scott
- 👤 Robert L. Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:23
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C10G; C10G29/00; C10G29/02; C10G2400/00; C10G2400/10; C10M2201/00; C10M2201/04; C10M2201/043; C10M2219/00; C10M2219/08; C10M2219/082
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
194 words
A process for forming stabilized lubricating oil resistant to oxidation and sludge formation upon exposure to an oxidative environment which comprises the steps of (1) contacting a hydrocarbon lubricating oil stock with elemental sulfur in amount of from about 0.05 to about 1.0 percent by weight of said oil stock at a temperature of between about 25° C. and about 130° C. and pressure of from about 0 psig to about 100 psig for a contact time of from about 0.1 hour to about 10 hours, and (2) contacting the oil product from step (1) with hydrogen and with alumina impregnated with at least about 10 weight percent MoO 3 and at least about 2.5 weight percent CoO, said impregnated alumina having at least 50 percent of the pores thereof in a pore diameter of 50 Angstrom units or more, at a temperature of from about 80° C. to about 190° C., a pressure of from about 100 psig to about 300 psig, a hydrogen circulation rate of from about 100 scf/bbl to about 1500 scf/bbl and a liquid hourly space velocity of from about 0.1 hr.sup. -1 to about 10 hu.sup. -1 .
Claim 2
Dependent Claim
194 words
A process for forming stabilized lubricating oil resistant to oxidation and sludge formation upon exposure to an oxidative environment which comprises the steps of (1) contacting a hydrocarbon lubricating oil stock with elemental sulfur in amount of from about 0.05 to about 1.0 percent by weight of said oil stock at a temperature of between about 25° C. and about 130° C. and pressure of from about 0 psig to about 100 psig for a contact time of from about 0.1 hour to about 10 hours, and (2) contacting the oil product from step (1) with hydrogen and with alumina impregnated with at least about 10 weight percent MoO 3 and at least about 2.5 weight percent CoO, said impregnated alumina having at least 50 percent of the pores thereof in a pore diameter of 50 Angstrom units or more, at a temperature of from about 80° C. to about 190° C., a pressure of from about 100 psig to about 300 psig, a hydrogen circulation rate of from about 100 scf/bbl to about 1500 scf/bbl and a liquid hourly space velocity of from about 0.1 hr.sup. -1 to about 10 hu.sup. -1 .
Claim 3
Dependent Claim
18 words
The process of claim 1 wherein said oil stock has a boiling range of above about 600° F.
Claim 4
Dependent Claim
14 words
The process of claim 1 wherein step (1) is conducted in an ultrasonic bath.
Claim 5
Dependent Claim
34 words
The process of claim 1 wherein said oil stock comprises a lubricating oil fraction obtained by fractionation of a crude oil identified as Pennsylvania, Midcontinent, Gulf Coast, West Texas, Amal, Kuwait, Barco or Arabian.
Claim 6
Dependent Claim
37 words
The process of claim 2 wherein said oil stock comprises at least a substantial part of one obtained by fractionation of a crude oil identified as Pennsylvania Midcontinent, Gulf Coast, West Texas, Amal, Kuwait, Barco or Arabian.
Claim 7
Dependent Claim
23 words
The process of claim 1 wherein said oil stock is a lubricating oil fraction obtained by fractionation of crude oil identified as Arabian.
Claim 8
Dependent Claim
11 words
The process of claim 1 wherein said elemental sulfur is crystalline.
Claim 9
Dependent Claim
18 words
The process of claim 7 wherein said crystalline sulfur is obtained by recrystallization of sublimed sulfur from toluene.
Claim 10
Dependent Claim
107 words
The process of claim 1 wherein step (1) is conducted at a temperature of from about 25° C. to about 70° C., a pressure of from about 0 psig to about 5 psig and a contact time of from about 0.5 hour to about 4 hours or more, and step (2) is conducted at a temperature of from about 150° C. to about 175° C., a pressure of from about 150 psig to about 250 psig, a hydrogen circulation rate of from about 500 scf/bbl to about 1100 scf/bbl and a liquid hourly space velocity of from about 0.5 hr.sup. -1 to about 2.5 hr.sup. -1 .
Claim 11
Dependent Claim
35 words
The process of claim 9 wherein the hydrocarbon lubricating oil stock is contacted with elemental sulfur in amount of from about 0.1 to about 0.5 percent by weight of said oil stock in step (1).
Claim 12
Dependent Claim
35 words
The process of claim 1 wherein the alumina in step (2) is impregnated with from about 2.5 to about 4 weight percent CoO and from about 10 to about 15 weight percent MoO 3 .
Claim 13
Dependent Claim
35 words
The process of claim 9 wherein the alumina in step (2) is impregnated with from about 2.5 to about 3.5 weight percent CoO and from about 10.5 to about 13.5 weight percent MoO 3 .
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-05-02 | 1980-11-01 | 1981-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-02 | 1984-11-01 | 1985-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-02 | 1988-11-01 | 1989-05-03 | $7700.00 | Window Closed / Lapsed |