Patent US3931338A successfully refreshed from Google Patents.
US3931338A
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Method for production of hydroxyalkylglycol ethers
Assignee: Henkel AG and Co KGaA
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Filing: 1974-04-08
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Granted: 1976-01-06
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Expires: 1994-04-08
Abstract
Abstract A method for the production of hydroxyalkyl glycol ethers comprises reacting non-terminal epoxides with ethylene glycol in the presence of an alkoxylation catalyst and saturated hydrocarbons, in particular, saturated aliphatic hydrocarbons, as solvents.
Inventors
- 👤 Wolfgang Rupilius
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:17
CPC Classifications
C; C07; C07C; C07C41/00; C07C41/01; C07C41/02; C07C43/00; C07C43/02; C07C43/03; C07C43/04; C07C43/10; C07C43/13
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
111 words
In the method for the production of hydroxyalkylglycol ethers of the formula ##EQU12## wherein R 1 and R 2 are each alkyl having 2 to 22 carbon atoms, with the proviso that the sum of R 1 plus R 2 is from 6 to 26 carbon atoms, comprising reacting a vicinal non-terminal epoxide of the formula ##EQU13## wherein R 1 and R 2 have the above-defined meanings with ethylene glycol in the presence of a catalytic amount of an acid alkoxylation catalyst; wherein the improvement comprises conducting said reaction in the presence of at least one solvent consisting essentially of at least one saturated hydrocarbon having 4 to 24 carbon atoms.
Claim 2
Dependent Claim
111 words
In the method for the production of hydroxyalkylglycol ethers of the formula ##EQU12## wherein R 1 and R 2 are each alkyl having 2 to 22 carbon atoms, with the proviso that the sum of R 1 plus R 2 is from 6 to 26 carbon atoms, comprising reacting a vicinal non-terminal epoxide of the formula ##EQU13## wherein R 1 and R 2 have the above-defined meanings with ethylene glycol in the presence of a catalytic amount of an acid alkoxylation catalyst; wherein the improvement comprises conducting said reaction in the presence of at least one solvent consisting essentially of at least one saturated hydrocarbon having 4 to 24 carbon atoms.
Claim 3
Dependent Claim
37 words
The method of claim 1, in which said solvent is selected from the group consisting of alkane having 4 to 24 carbon atoms and mixtures thereof and cycloalkane having 4 to 24 carbon atoms and mixtures thereof.
Claim 4
Dependent Claim
37 words
The method of claim 1, in which said solvent is selected from the group consisting of alkane having 5 to 16 carbon atoms, and mixtures thereof and cycloalkane having 5 to 16 carbon atoms and mixtures thereof.
Claim 5
Dependent Claim
37 words
The method of claim 1, in which said solvent is selected from the group consisting of cyclohexane, cyclopentane, decahydronaphthalene and mixtures thereof and pentane, hexane, heptane, octane, nonane, decane, undecane, dodecane, tridecane, pentadecane, hexadecane, and mixtures thereof.
Claim 6
Dependent Claim
24 words
The method of claim 1, in which said solvent is selected from the group consisting of pentane, hexane, heptane, octane and the mixtures thereof.
Claim 7
Dependent Claim
17 words
The method of claim 1, in which said solvent is alkane having 5 to 8 carbon atoms.
Claim 8
Dependent Claim
11 words
The method of claim 1, in which said solvent is pentane.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-01-05 | 1979-07-07 | 1980-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-05 | 1983-07-07 | 1984-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-05 | 1987-07-07 | 1988-01-06 | $7700.00 | Window Closed / Lapsed |