Patent US4225488A successfully refreshed from Google Patents.
US4225488A
Expired / Lapsed
US
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Process for making sulfurized olefins
Assignee: Mobil Oil AS
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Filing: 1978-07-25
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Granted: 1980-09-30
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Expires: 1998-07-25
Abstract
Abstract In preparing organic sulfides by reacting olefins (e.g., butylenes) with a sulfur halide to form a sulfohalogenated intermediate which is subsequently sulfurized and dehalogenated by reaction with an aqueous solution of an alkali metal sulfide compound to form a noncorrosive organic sulfide product of high sulfur content, the copper strip corrosion activity is improved by resulfurizing the sulfurized olefin by contacting it with additional aqueous metal sulfide in the presence of a lower molecular weight alcohol, such as isopropanol.
Inventors
- 👤 Andrew G. Horodysky
- 👤 Phillip S. Landis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:11
CPC Classifications
C; C07; C07C; C07C319/00; C07C319/14
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
95 words
An organic sulfide produced by an improved process comprising the steps of: (1) reacting sulfur halide with an olefin, the olefin to sulfur halide molar ratio ranging from about 1:1 to about 1.65:1; and (2) reacting the product of (1) with an alkali metal sulfide; (3) the improvement comprising reacting the product of (2) with a separate portion of an aqueous solution comprising alkali metal sulfide such that the alkali metal sulfide is present to the extent of from about 0.2 mole to about 1.2 mole of sulfide per mole of the product of (2).
Claim 2
Dependent Claim
95 words
An organic sulfide produced by an improved process comprising the steps of: (1) reacting sulfur halide with an olefin, the olefin to sulfur halide molar ratio ranging from about 1:1 to about 1.65:1; and (2) reacting the product of (1) with an alkali metal sulfide; (3) the improvement comprising reacting the product of (2) with a separate portion of an aqueous solution comprising alkali metal sulfide such that the alkali metal sulfide is present to the extent of from about 0.2 mole to about 1.2 mole of sulfide per mole of the product of (2).
Claim 3
Dependent Claim
12 words
The organic sulfide of claim 1 wherein the alkali metal is sodium.
Claim 4
Dependent Claim
11 words
The organic sulfide of claim 2 wherein the halide is chloride.
Claim 5
Dependent Claim
11 words
The organic sulfide of claim 1 wherein the olefin is isobutylene.
Claim 6
Dependent Claim
14 words
The organic sulfide of claim 1 wherein the alkali metal sulfide is sodium monosulfide.
Claim 7
Dependent Claim
96 words
An improved process for producing an organic sulfide comprising the steps of: (1) reacting sulfur halide with an olefin, the olefin to sulfur halide molar ratio ranging from about 1:1 to about 1.65:1; and (2) reacting the product of (1) with an alkali metal sulfide; (3) the improvement whereby the product of (2) is reacted with a separate portion of an aqueous solution comprising alkali metal sulfide such that the alkali metal sulfide is present to the extent of from about 0.2 mole to about 1.2 mole of sulfide per mole of the product of (2).
Claim 8
Dependent Claim
96 words
An improved process for producing an organic sulfide comprising the steps of: (1) reacting sulfur halide with an olefin, the olefin to sulfur halide molar ratio ranging from about 1:1 to about 1.65:1; and (2) reacting the product of (1) with an alkali metal sulfide; (3) the improvement whereby the product of (2) is reacted with a separate portion of an aqueous solution comprising alkali metal sulfide such that the alkali metal sulfide is present to the extent of from about 0.2 mole to about 1.2 mole of sulfide per mole of the product of (2).
Claim 9
Dependent Claim
11 words
The process of claim 6 wherein the alkali metal is sodium.
Claim 10
Dependent Claim
10 words
The process of claim 7 wherein the halide is chloride.
Claim 11
Dependent Claim
13 words
The process of claim 6 wherein the alkali metal sulfide is sodium monosulfide.
Claim 12
Dependent Claim
15 words
The process of claim 6 wherein the olefin has from 2 to 12 carbon atoms.
Claim 13
Dependent Claim
20 words
The process of claim 6 wherein the step (1) reaction is run at a temperature not greater than 160° F.
Claim 14
Dependent Claim
17 words
The process of claim 6 wherein the temperature is from about 120° F. to about 135° F.
Claim 15
Dependent Claim
23 words
The process of claim 6 wherein the step (3) reaction is run at a temperature of from about 150° to about 250° F.
Claim 16
Dependent Claim
10 words
The process of claim 6 wherein the olefin is isobutylene.
Claim 17
Dependent Claim
20 words
The process of claim 6 wherein the alklai metal sulfide is derived from the spent effluent from hydrocarbon purification operations.
Claim 18
Dependent Claim
22 words
The organic sulfide of claim 1 in which the alkali metal sulfide is derived from the spent effluent from hydrocarbon purification operations.
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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) | 1983-09-30 | 1984-03-31 | 1984-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-30 | 1988-03-31 | 1988-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-30 | 1992-03-31 | 1992-09-30 | $7700.00 | Window Closed / Lapsed |