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US4090953A Expired / Lapsed US ⏱️ 0.0 years remaining

Process for upgrading lubricating oil stock

Assignee: Mobil Oil AS
•
Filing: 1976-06-08
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Granted: 1978-05-23
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Expires: 1996-06-08
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Abstract

Abstract An improved process for preparing a stabilized lubricating oil resistant to oxidation and sludge formation upon exposure to a highly oxidative environment, such as when metals are present and an overbased component is present in the lubricating oil, is provided. In the present process wherein a lubricating oil stock to be upgraded is contacted with elemental sulfur in the presence of a catalyst material selected from the group consisting of alumina, aluminosilicate, a metal of Groups II-A, II-B, VI-B or VIII of the Periodic Table of Elements, an oxide of a metal of Groups II-A, II-B, VI-B or VIII, a sulfide of a metal of Groups II-A, II-B, VI-B or VIII, clay, silica, silica combined with an oxide of a metal of Groups II-A, III-A, IV-B or V-B, and combinations thereof, at relatively low temperatures of from about 150 DEG to about 225 DEG C, an improvement is provided which comprises conducting said contacting in a flow reactor or under conditions comparable to those existing in a flow reactor at a liquid hourly space velocity of from about 0.5 hr-1 to about 20 hr-1 whereby the amount of elemental sulfur required to provide a stabilized lubricating oil stock is significantly lower than when a batch reactor is utilized, thus facilitating subsequent removal of excess unreacted sulfur.

Inventors

  • 👤 Robert F. Bridger
  • 👤 Costandi A. Audeh
  • 👤 El-Ahmadi I. Heiba

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-01 13:16
CPC Classifications
C; C10; C10G; C10G29/00; C10G29/02; C10G2400/00; C10G2400/10

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 192 words
In a process for preparing a stabilized lubricating oil resistant to oxidation and sludge formation upon exposure to a highly oxidative environment which comprises contacting a hydrocarbon fraction lubricating oil stock boiling above about 600° F with added elemental sulfur, said contacting in the presence of a catalyst material selected from the group consisting of alumina, aluminosilicate, a metal of Groups II-A, II-B, VI-B or VIII of the Periodic Table of Elements, an oxide of a metal of Groups II-A, II-B, VI-B or VIII, a sulfide of a metal of Groups II-A, II-B, VI-B or VIII, clay, silica, silica combined with an oxide of a metal of Groups II-A, III-A, IV-B or V-B, and combinations thereof at a reaction temperature of from about 150° to about 225° C and a reaction pressure of from about 0 psig to about 500 psig, the improvement which comprises conducting said contacting in a flow reactor at a liquid hourly space velocity of from about 0.5 hr -1 to about 20 hr -1 wherein said elemental sulfur is added in an amount of from about 0.025 to about 0.2 percent by weight of said oil stock.
Claim 2
Dependent Claim 192 words
In a process for preparing a stabilized lubricating oil resistant to oxidation and sludge formation upon exposure to a highly oxidative environment which comprises contacting a hydrocarbon fraction lubricating oil stock boiling above about 600° F with added elemental sulfur, said contacting in the presence of a catalyst material selected from the group consisting of alumina, aluminosilicate, a metal of Groups II-A, II-B, VI-B or VIII of the Periodic Table of Elements, an oxide of a metal of Groups II-A, II-B, VI-B or VIII, a sulfide of a metal of Groups II-A, II-B, VI-B or VIII, clay, silica, silica combined with an oxide of a metal of Groups II-A, III-A, IV-B or V-B, and combinations thereof at a reaction temperature of from about 150° to about 225° C and a reaction pressure of from about 0 psig to about 500 psig, the improvement which comprises conducting said contacting in a flow reactor at a liquid hourly space velocity of from about 0.5 hr -1 to about 20 hr -1 wherein said elemental sulfur is added in an amount of from about 0.025 to about 0.2 percent by weight of said oil stock.
Claim 3
Dependent Claim 68 words
The process of claim 1 wherein said elemental sulfur is added in amount of from about 0.05 to about 0.15 percent by weight of said oil stock, said reaction temperature is from about 160° to about 180° C, said reaction pressure is from about 0 psig to about 200 psig, and said liquid hourly space velocity is from about 1 hr -1 to about 10 hr -1 .
Claim 4
Dependent Claim 23 words
The process of claim 2 wherein said liquid hourly space velocity is from about 1 hr -1 to about 5 hr -1 .
Claim 5
Dependent Claim 29 words
The process of claim 1 wherein said contacting is in the presence of said catalyst material in conjunction with a secondary agent selected from the group consisting of bases.
Claim 6
Dependent Claim 11 words
The process of claim 4 wherein said base is sodium hydroxide.
Claim 7
Dependent Claim 37 words
The process of claim 1 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.

References Cited (Backward Citations)

US1795278A Cited
US2854399A Cited
US2985586A Cited
US3904511A Cited
US3917566A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1981-05-22 1981-11-21 1982-05-23 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1985-05-22 1985-11-21 1986-05-23 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1989-05-22 1989-11-21 1990-05-23 $7700.00 Window Closed / Lapsed

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