Patent US412062A successfully refreshed from Google Patents.
Patent US4281202A successfully refreshed from Google Patents.
US4281202A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of mercapto-alcohols
Assignee: Arkema Inc
•
Filing: 1980-04-29
•
Granted: 1981-07-28
•
Expires: 2000-04-29
Abstract
Abstract A process for preparing mercapto-alcohols by reacting a molar excess of hydrogen sulfide with an alkylene, cycloalkylene, or aralkylene oxide in the presence of an alkali metal zeolite catalyst.
Inventors
- 👤 Bernard Buchholz
- 👤 Charles B. Welsh
- 👤 Henry C. Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:38
CPC Classifications
C; C07; C07C; C07C319/00; C07C319/02; C07C2601/00; C07C2601/12; C07C2601/14
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
66 words
A process for preparing mercapto-alcohols which comprises reacting a molar excess of hydrogen sulfide at sufficient pressure to maintain said hydrogen sulfide as a liquid with an alkylene, cycloalkylene, or aralkylene oxide having up to 8 carbon atoms in the presence of a zeolite catalyst in the alkali metal form and selected from the group consisting of Type X, Type Y, Type L and mixtures thereof.
Claim 2
Dependent Claim
66 words
A process for preparing mercapto-alcohols which comprises reacting a molar excess of hydrogen sulfide at sufficient pressure to maintain said hydrogen sulfide as a liquid with an alkylene, cycloalkylene, or aralkylene oxide having up to 8 carbon atoms in the presence of a zeolite catalyst in the alkali metal form and selected from the group consisting of Type X, Type Y, Type L and mixtures thereof.
Claim 3
Dependent Claim
14 words
The process of claim 1, in which the alkali metal is sodium or potassium.
Claim 4
Dependent Claim
13 words
The process of claim 1, in which the alkylene oxide is ethylene oxide.
Claim 5
Dependent Claim
13 words
The process of claim 1, in which the alkylene oxide is propylene oxide.
Claim 6
Dependent Claim
12 words
The process of claim 1, in which the alkylene oxide is glycidol.
Claim 7
Dependent Claim
13 words
The process of claim 1, in which the cycloalkylene oxide is cyclohexene oxide.
Claim 8
Dependent Claim
13 words
The process of claim 1, in which the aralkylene oxide is styrene oxide.
Claim 9
Dependent Claim
18 words
The process of claim 1, in which the reaction pressure is autogenous and the temperature is 35°-120° C.
Claim 10
Dependent Claim
19 words
The process of claim 1, in which the mole ratio of hydrogen sulfide to alkylene oxide is about 2:1.
Claim 11
Dependent Claim
103 words
The process of claim 1 which is operated continuously and which comprises continuously feeding a mixture of hydrogen sulfide and alkylene oxide into a reaction zone containing a solid zeolite catalyst and maintained at 35°-120° C. and sufficient pressure to maintain hydrogen sulfide as a liquid, there being a molar excess of hydrogen sulfide to alkylene oxide, and the feed rate of alkylene oxide being 300-900 gram-moles per kilogram of catalyst per 24 hours; said zeolite catalyst being Type X, Type Y, or Type L and in the sodium or potassium form; and continuously recovering a product analyzing at least 95% as mercapto-alcohol.
Claim 12
Dependent Claim
19 words
The process of claim 10 in which the molar ratio of hydrogen sulfide to alkylene oxide is about 2:1.
Claim 13
Dependent Claim
17 words
The process of claim 10, in which the alkylene is ethylene oxide and the product is 2-mercaptoethanol.
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) | 1984-07-27 | 1985-01-26 | 1985-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-07-27 | 1989-01-26 | 1989-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-07-27 | 1993-01-26 | 1993-07-28 | $7700.00 | Window Closed / Lapsed |