US4240958A
Expired / Lapsed
US
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Process of preparing sulfurized olefins
Assignee: Mobil Oil AS
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Filing: 1978-12-20
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Granted: 1980-12-23
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Expires: 1998-12-20
Abstract
Abstract A process wherein a sulfur halide and an olefin reacted in the presence of catalytic amounts of iodine provides an increased yield of an intermediate adduct with high olefin to sulfur halide ratio; said adduct is thereafter sulfurized with a metal sulfide to provide increased yield of a sulfurized olefin and, when a minor amount of sulfur halide is added to the adduct prior sulfurizing, a substantially increased yield of sulfurized olefin highly useful as a lubricant additive having improved copper corrosion properties is provided.
Inventors
- 👤 Milton Braid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:06
CPC Classifications
C; C07; C07G; C07G99/00; C07G99/002; C07G99/0022; C10; C10M; C10M135/00; C10M135/02; C10M135/04; C10M2203/00; C10M2203/06; C10M2205/00; C10M2205/02; C10M2205/026; C10M2205/028; C10M2207/00; C10M2207/04; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/286; C10M2207/34; C10M2209/00; C10M2209/02; C10M2209/10; C10M2211/00; C10M2211/02; C10M2215/00; C10M2215/10; C10M2215/102; C10M2219/00; C10M2219/02; C10M2219/022; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/042; C10M2227/00; C10M2227/02; C10M2227/04; C10M2227/08; C10M2227/081; C10M2229/00; C10M2229/02; C10M2229/04; C10M2229/05; C10N; C10N2050/00; C10N2050/10
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
48 words
A process for preparing a sulfurized olefinic compound comprising reacting a C 2 -C 20 olefin and a sulfur halide in the presence of a catalytic amount of iodine, separating the intermeiate adduct thus produced from the reaction medium and thereafter sulfurizing it with an alkali metal sulfide.
Claim 2
Dependent Claim
48 words
A process for preparing a sulfurized olefinic compound comprising reacting a C 2 -C 20 olefin and a sulfur halide in the presence of a catalytic amount of iodine, separating the intermeiate adduct thus produced from the reaction medium and thereafter sulfurizing it with an alkali metal sulfide.
Claim 3
Dependent Claim
23 words
A process as defined in claim 1 wherein said adduction reaction is conducted at a temperature of from about 45° to 55° C.
Claim 4
Dependent Claim
35 words
A process as dfined in claim 2 wherein said reaction is carried out in the presence of from about 0.025 to about 5 percent by weight of iodine, based on the weight of sulfur halide.
Claim 5
Dependent Claim
17 words
A process as defined in claim 3 wherein about 0.1 percent by weight of iodine is present.
Claim 6
Dependent Claim
30 words
A process as defined in claims 1, 2 or 3 wherein the olefin and the sulfur halide are reacted in a mole ratio of from about 0.5:1 to about 2.5:1.
Claim 7
Dependent Claim
30 words
A process as defined in claims 1, 2 or 4 wherein the olefin and the sulfur halide are reacted in a mole ratio of from about 1:1 to about 2:1.
Claim 8
Dependent Claim
23 words
A process as defined in claims 1, 2 or 3 wherein the olefin is isobutylene and the sulfur halide is a sulfur monohalide.
Claim 9
Dependent Claim
14 words
A process as defined in claim 7 wherein the sulfur halide is sulfur monochloride.
Claim 10
Dependent Claim
19 words
A process as defined in claims 1, 2, 4 or 8 wherein said alkali metal sulfide is sodium sulfide.
Claim 11
Dependent Claim
42 words
A process wherein said adduct prepared as in claims 1, 2 or 7 after removal from the reaction mixture and separation of unreacted olefin is mixed with an additional minor amount of said sulfur halide and thereafter sulfurized with alkali metal sulfide.
Claim 12
Dependent Claim
26 words
A process as defined in claim 10 wherein said olefin is isobutylene, said sulfur halide is sulfur monochloride and said alkali metal sulfide is sodium sulfide.
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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) | 1983-12-23 | 1984-06-23 | 1984-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-23 | 1988-06-23 | 1988-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-23 | 1992-06-23 | 1992-12-23 | $7700.00 | Window Closed / Lapsed |