US4233131A
Expired / Lapsed
US
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Process for preparing alkylene episulfides and episelenides
Assignee: Honeywell International Inc
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Filing: 1979-10-29
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Granted: 1980-11-11
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Expires: 1999-10-29
Abstract
Abstract A process for the preparation of alkylene episulfides or episelenides is provided which comprises contacting elemental sulfur or elemental selenium, respectively, with an olefin, preferably ethylene, while irradiating with electromagnetic radiation in the infrared to ultraviolet range. The alkylene episulfides and episelenides are useful in the production of a variety of functional polymers.
Inventors
- 👤 Charles T. Ratcliffe
- 👤 James T. Yardley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:20
CPC Classifications
C; C07; C07D; C07D331/00; C07D331/02
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
84 words
A process for the preparation of alkylene episulfides or episelenides which comprises contacting elemental sulfur or elemental selenium, respectively, with an olefin while irradiating the sulfur/seleniumolefin materials with electromagnetic radiation in the infrared to ultraviolet range, said olefin having 2 to 6 carbon atoms and being represented by the formula: R.sup.1 R.sup.2 C=CR.sup.3 R.sup.4 wherein R 1 , R 2 , R 3 and R 4 are independently selected from the group consisting of hydrogen and alkyl groups of 1 to 4 carbon atoms.
Claim 2
Dependent Claim
84 words
A process for the preparation of alkylene episulfides or episelenides which comprises contacting elemental sulfur or elemental selenium, respectively, with an olefin while irradiating the sulfur/seleniumolefin materials with electromagnetic radiation in the infrared to ultraviolet range, said olefin having 2 to 6 carbon atoms and being represented by the formula: R.sup.1 R.sup.2 C=CR.sup.3 R.sup.4 wherein R 1 , R 2 , R 3 and R 4 are independently selected from the group consisting of hydrogen and alkyl groups of 1 to 4 carbon atoms.
Claim 3
Dependent Claim
10 words
The process of claim 1 wherein elemental sulfur is irradiated.
Claim 4
Dependent Claim
10 words
The process of claim 1 wherein the olefin is ethylene.
Claim 5
Dependent Claim
10 words
The process of claim 1 wherein the olefin is propylene.
Claim 6
Dependent Claim
14 words
The process of claim 1 wherein the source of electromagnetic radiation is a laser.
Claim 7
Dependent Claim
15 words
The process of claim 1 wherein the source of electromagnetic radiation is a KrF laser.
Claim 8
Dependent Claim
15 words
The process of claim 3 wherein the ethylene pressure is less than about 80 kPa.
Claim 9
Dependent Claim
17 words
The process of claim 7 wherein the ethylene pressure is between about 5 kPa and 40 kPa.
Claim 10
Dependent Claim
14 words
The process of claim 1 wherein the process is carried out at ambient temperature.
Claim 11
Dependent Claim
18 words
The process of claim 2 wherein the process is carried out at a temperature below about 600° C.
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) | 1983-11-11 | 1984-05-12 | 1984-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-11 | 1988-05-12 | 1988-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-11 | 1992-05-12 | 1992-11-11 | $7700.00 | Window Closed / Lapsed |