Patent US3689568A successfully refreshed from Google Patents.
US3689568A
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Preparation of primary mercaptans
Assignee: DONALD J MARTIN
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Filing: 1969-08-13
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Granted: 1972-09-05
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Expires: 1989-08-13
Abstract
Abstract The non-Markownikoff reaction of hydrogen sulfide with a hydrocarbon or substituted hydrocarbon having at least one olefinic linkage is accomplished by reacting hydrogen sulfide and hydrocarbon in the presence of a trivalent organic phosphorus compound as the sole initiator.
Inventors
- 👤 Richard J Eletto
- 👤 Donald J Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:16
CPC Classifications
C; C07; C07C; C07C319/00; C07C319/02; C07C319/04; C07C319/14; C07C319/16; C07C2601/00; C07C2601/12; C07C2601/14
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
27 words
The process of claim 1 wherein said trivalent phosphorus compound is present in an amount from about 0.01 to about 0.5 mole per mole of olefinic linkage.
Claim 2
Dependent Claim
10 words
The process of claim 1 wherein the olefin is ethylene.
Claim 3
Dependent Claim
10 words
The process of claim 1 wherein the olefin is propylene.
Claim 4
Dependent Claim
18 words
The process of claim 1 wherein the process is carried out in the presence of an inert diluent.
Claim 5
Dependent Claim
12 words
The process of claim 1 wherein said phosphorus compound is a phosphite.
Claim 6
Dependent Claim
12 words
The process of claim 1 wherein said phosphorus compound is a phosphine.
Claim 7
Dependent Claim
12 words
The process of claim 1 wherein said phosphorus compound is trimethyl phosphite.
Claim 8
Dependent Claim
12 words
The process of claim 1 wherein said phosphorus compound is triethyl phosphite.
Claim 9
Dependent Claim
12 words
The process of claim 1 wherein said phosphorus compound is triphenyl phosphite.
Claim 10
Dependent Claim
12 words
The process of claim 1 wherein said phosphorus compound is tributyl phosphite.
Claim 11
Dependent Claim
12 words
The process of claim 1 wherein said phosphorus compound is tributyl phosphine.
Claim 12
Dependent Claim
12 words
The process of claim 1 wherein said phosphorus compound is trimethyl phosphine.
Claim 13
Dependent Claim
12 words
The process of claim 1 wherein said phosphorus compound is triphenyl phosphine.
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) | 1975-09-05 | 1976-03-06 | 1976-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-05 | 1980-03-06 | 1980-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-05 | 1984-03-06 | 1984-09-05 | $7700.00 | Window Closed / Lapsed |