US3975449A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrogenation of epoxides to primary alcohols
Assignee: Chevron USA Inc
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Filing: 1974-08-05
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Granted: 1976-08-17
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Expires: 1994-08-05
Abstract
Abstract A process for producing a primary diol and/or triol from an epoxide which comprises contacting the epoxide with hydrogen gas and a solid catalyst comprising nickel or cobalt at a temperature between 20° and 200°C. and at a pressure sufficient to maintain liquid phase, and wherein the epoxide has the following formula: ##EQU1## wherein R is an alkylene diradical of 1 to 5 carbon atoms and R' is a hydroxy alkyl having 1 to 5 carbon atoms or alkyl having 1 to 5 carbon atoms.
Inventors
- 👤 Shigeto Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:59
CPC Classifications
C; C07; C07C; C07C29/00; C07C29/132
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
138 words
A process for producing a primary alcohol as the main product from an epoxide which comprises contacting the epoxide with hydrogen gas and a solid catalyst comprising nickel or cobalt at a temperature between 20° and 200°C. and a pressure sufficient to maintain liquid phase and wherein the epoxide has the following formula: ##EQU2## wherein R is an alkylene diradical of 1 to 5 carbon atoms and R' is a hydroxy alkyl or alkyl having 1 to 5 carbon atoms. wherein the epoxide contacting is carried out in the presence of a solvent comprising a low molecular weight alcohol and water, and wherein the nickel or cobalt of the solid catalyst are in the elemental form or are the sulfide, oxide or hydride, thereby producing primary alcohol from the epoxide as the main product of the epoxide hydrogenation.
Claim 2
Dependent Claim
138 words
A process for producing a primary alcohol as the main product from an epoxide which comprises contacting the epoxide with hydrogen gas and a solid catalyst comprising nickel or cobalt at a temperature between 20° and 200°C. and a pressure sufficient to maintain liquid phase and wherein the epoxide has the following formula: ##EQU2## wherein R is an alkylene diradical of 1 to 5 carbon atoms and R' is a hydroxy alkyl or alkyl having 1 to 5 carbon atoms. wherein the epoxide contacting is carried out in the presence of a solvent comprising a low molecular weight alcohol and water, and wherein the nickel or cobalt of the solid catalyst are in the elemental form or are the sulfide, oxide or hydride, thereby producing primary alcohol from the epoxide as the main product of the epoxide hydrogenation.
Claim 3
Dependent Claim
15 words
A process in accordance with claim 1 wherein R' is methyl, ethyl, propyl or beta-hydroxyethyl.
Claim 4
Dependent Claim
23 words
A process in accordance with claim 1 wherein the catalyst is Raney nickel, nickel on a solid inorganic refractory support or Raney cobalt.
Claim 5
Dependent Claim
13 words
A process in accordance with claim 3 wherein the catalyst is Raney nickel.
Claim 6
Dependent Claim
15 words
A process in accordance with claim 1 wherein the temperature is between 80° and 200°C.
Claim 7
Dependent Claim
12 words
A process in accordance with claim 1 wherein the epoxide is 3,4-epoxy-3-methylbutanol.
Claim 8
Dependent Claim
16 words
A process in accordance with claim 1 wherein the alcohol is methanol, ethanol, i-butanol, or t-butanol.
Claim 9
Dependent Claim
19 words
A process in accordance with claim 5 wherein the feed is 3,4-epoxy-3-methylbutanol and the primary alcohol product is 2-methyl-1,4-butanediol.
Claim 10
Dependent Claim
19 words
A process in accordance with claim 5 wherein the feed is 2,3-epoxy-methylpropanol and the primary alcohol product is 2-methyl-1,3-propanediol.
Claim 11
Dependent Claim
19 words
A process in accordance with claim 5 wherein the feed is 3,4-epoxy-3-(2' -hydroxyethyl)-butanol and the primary alcohol is 3-methylol-1,5-pentanediol.
References Cited (Backward Citations)
US3028431A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-08-17 | 1980-02-16 | 1980-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-17 | 1984-02-16 | 1984-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-17 | 1988-02-16 | 1988-08-17 | $7700.00 | Window Closed / Lapsed |