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US3697499A
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Polysulfurized olefins
Assignee: Mobil Oil AS
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Filing: 1969-05-15
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Granted: 1972-10-10
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Expires: 1989-05-15
Abstract
Abstract Sulfurized olefins are produced by (1) reacting sulfur monochloride with a stoichiometric excess of a low-carbon atom olefin, (2) treating the resulting product with an alkali metal sulfide in the presence of free sulfur in an alcohol-water solvent, and (3) reacting that product with an inorganic base. This reaction sequence produces novel stable oil-soluble organic sulfides having extreme pressure properties and low corrosiveness to metal. Lubricating oil compositions containing an effective amount of these additives evidence good load carrying capability.
Inventors
- 👤 Herbert Myers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:16
CPC Classifications
C; C10; C10M; C10M135/00; C10M135/02; C10M135/04; C07; C07G; C07G99/00; C07G99/002; C07G99/0022
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
21 words
The polysulfurized isobutylene of claim 1 wherein the mole ratio of olefin to sulfur monochloride is from about 1 to 2:1.
Claim 2
Dependent Claim
21 words
The polysulfurized olefin of claim 2 wherein the mole ratio of isobutylene to sulfur monochloride is from about 1.25 to 1.8:
Claim 3
Dependent Claim
20 words
The polysulfurized olefin of claim 1 wherein the polysulfurized olefin contains from about 40 to about 60 percent of sulfur.
Claim 4
Dependent Claim
20 words
The polysulfurized olefin of claim 4 wherein the polysulfurized olefin contains from about 46 to about 50 percent of sulfur.
Claim 5
Dependent Claim
52 words
The polysulfurized olefin of claim 1 wherein the polysulfurized olefin is produced by reacting sulfur monochloride with from 1.25 to 1.8 moles per mole of sulfur monochloride of isobutylene, reacting the product of that reaction with an alkali metal monosulfide, and 0.5 gram atoms of free sulfur per mole of metal monosulfide.
Claim 6
Dependent Claim
14 words
The polysulfurized olefin of claim 1 wherein the alkali metal hydroxide is sodium hydroxide.
Claim 7
Dependent Claim
14 words
The polysulfurized olefin of claim 1 wherein the alkali metal monosulfide is sodium sulfide.
Claim 8
Dependent Claim
25 words
The polysulfurized olefin of claim 1 wherein the mole ratio of alkali metal monosulfide to sulfur monochloride-olefin product is from about 0.8 to about 1:2.
Claim 9
Dependent Claim
27 words
The polysulfurized olefin of claim 1 wherein the alkali metal monosulfide and sulfur are reacted with the sulfur monochloride-olefin product in the presence of a water-soluble alcohol.
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) | 1975-10-10 | 1976-04-10 | 1976-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-10 | 1980-04-10 | 1980-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-10 | 1984-04-10 | 1984-10-10 | $7700.00 | Window Closed / Lapsed |