Patent US3971833A successfully refreshed from Google Patents.
US3971833A
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Method for the preparation of alcohol-free alkali and alkaline earth metal alcoholates
Assignee: Dynamit Nobel AG
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Filing: 1974-06-25
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Granted: 1976-07-27
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Expires: 1994-06-25
Abstract
Abstract A process for the preparation of an alcohol-free alkali or alkaline earth metal alcoholates dissolved in inert solvent which comprises contacting at least an equimolar amount of an alkali or alkaline earth metal dissolved in an inert solvent with an alcohol at an elevated pressure and at a temperature of at least that at which crystal alcohol splits off from the corresponding alkali or alkaline earth metal alcoholate and below the temperature at which said alcoholate decomposes under the prevailing pressures.
Inventors
- 👤 Arnold Lenz
- 👤 Walter Rogler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:24
CPC Classifications
C; C07; C07C; C07C29/00; C07C29/68; C07C29/70
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
92 words
A process for the preparation of an alcohol-free alkali or alkaline earth metal alchoholate dissolved in an inert hydrocarbon solvent which comprises contacting at least an equimolar amount of an alkali or alkaline earth metal in an inert hydrocarbon solvent, which solvent is inert to said alkali or alkaline earth metal, with a monovalent C 1 -C 24 alcohol at an elevated pressure equivalent to autogenous pressure and at a temperature of at least 160°C and below the temperature at which alkali or alkaline earth metal alcoholate decomposes under the prevailing pressure.
Claim 2
Dependent Claim
92 words
A process for the preparation of an alcohol-free alkali or alkaline earth metal alchoholate dissolved in an inert hydrocarbon solvent which comprises contacting at least an equimolar amount of an alkali or alkaline earth metal in an inert hydrocarbon solvent, which solvent is inert to said alkali or alkaline earth metal, with a monovalent C 1 -C 24 alcohol at an elevated pressure equivalent to autogenous pressure and at a temperature of at least 160°C and below the temperature at which alkali or alkaline earth metal alcoholate decomposes under the prevailing pressure.
Claim 3
Dependent Claim
23 words
A process according to claim 1 wherein said alkali or alkaline earth metal contacts said alcohol at a temperature between 160° and 210°C.
Claim 4
Dependent Claim
12 words
A process according to claim 2 wherein the pressure is autogenous pressure.
Claim 5
Dependent Claim
24 words
A process according to claim 2 wherein the alkali or alkaline earth metal is present in the resultant reaction mixture in a molar excess.
Claim 6
Dependent Claim
15 words
A process according to claim 4 wherein the molar excess is between 5 and 15%.
Claim 7
Dependent Claim
36 words
A process according to claim 2 wherein the temperature at which said alkali or alkaline earth metal contacts said alcohol is 5° to 10°C above the temperature at which crystal alcohol splits off at normal pressure.
Claim 8
Dependent Claim
30 words
A process according to claim 2 wherein the alkali metal or alkaline earth metal is present in said inert solvent in an amount between 1 and 10 percent by weight.
Claim 9
Dependent Claim
14 words
A process according to claim 7 wherein a mixture of hydrocarbon solvents is employed.
Claim 10
Dependent Claim
13 words
A process according to claim 8 wherein said mixture comprises cyclohexane and toluene.
Claim 11
Dependent Claim
11 words
A process according to claim 7 wherein said solvent is xylene.
Claim 12
Dependent Claim
11 words
A process according to claim 7 wherein said solvent is benzine.
Claim 13
Dependent Claim
14 words
A process according to claim 2 wherein said alcohol is an iso-alcohol or carbinol.
Claim 14
Dependent Claim
15 words
A process according to claim 2 wherein said alcohol is a secondary or tertiary alcohol.
Claim 15
Dependent Claim
17 words
A process according to claim 2 wherein said alcohol is tertiary butyl alcohol or tertiary amyl alcohol.
Claim 16
Dependent Claim
17 words
A process according to claim 14 wherein the alkali or alkaline earth metal is sodium or potassium.
Claim 17
Dependent Claim
19 words
A process according to claim 1 wherein the alcohol has a chain length of 1 to 8 carbon atoms.
References Cited (Backward Citations)
CA517360A
Cited
US3761529A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-07-27 | 1980-01-26 | 1980-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-27 | 1984-01-26 | 1984-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-27 | 1988-01-26 | 1988-07-27 | $7700.00 | Window Closed / Lapsed |