US4866165A
Expired / Lapsed
US
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Process for the preparation of alkyloligoglycosides
Assignee: Huels AG
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Filing: 1987-02-18
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Granted: 1989-09-12
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Expires: 2007-02-18
Abstract
Abstract Alkyloligoglycosides are prepared by glycoside alcoholysis of lower alkylglycosides with alcohols. The average degree of oligomerization is adjusted by the use of catalytic amounts of an acid.
Inventors
- 👤 Harald Luders
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:11
CPC Classifications
C; C07; C07H; C07H15/00; C07H15/02; C07H15/04; C07H3/00; C07H3/04; C07H3/06
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
100 words
A process for the preparation of alkyloligoglycosides, comprising the steps of: contacting an alkylglycoside, an alkyloligoglycoside or mixture thereof, wherein said alkyl comprises 2-6 carbon atoms, with a C 4 -24 alcohol in the presence of an acid catalyst, the molar ratio of said alcohol to said alkylglycoside or alkylologoglycoside being from 10:1 to 0.5:1, wherein said alcohol has at least three carbon atoms more than the alkyl groups of said alkylglycoside or alkyloligoglycoside; and regulating the degree of oligomerization of said alkyloligoglycoside by adjusting the acid catalyst concentration, wherein increasing the acid catalyst concentration increases the degree of oligomerization.
Claim 2
Dependent Claim
100 words
A process for the preparation of alkyloligoglycosides, comprising the steps of: contacting an alkylglycoside, an alkyloligoglycoside or mixture thereof, wherein said alkyl comprises 2-6 carbon atoms, with a C 4 -24 alcohol in the presence of an acid catalyst, the molar ratio of said alcohol to said alkylglycoside or alkylologoglycoside being from 10:1 to 0.5:1, wherein said alcohol has at least three carbon atoms more than the alkyl groups of said alkylglycoside or alkyloligoglycoside; and regulating the degree of oligomerization of said alkyloligoglycoside by adjusting the acid catalyst concentration, wherein increasing the acid catalyst concentration increases the degree of oligomerization.
Claim 3
Dependent Claim
21 words
The process of claim 1, wherein said effective acid concentration is 2-200 milliequivalents of said acid per kilogram of said alcohol.
Claim 4
Dependent Claim
11 words
The process of claim 1, wherein said acid is sulfuric acid.
Claim 5
Dependent Claim
13 words
The process of claim 1, wherein said alcohol has from 8-20 carbon atoms.
Claim 6
Dependent Claim
17 words
The process of claim 4, wherein said alkylglycosides and alkyloligoglycosides are butylglycosides and butyloligoglycosides or mixtures thereof.
Claim 7
Dependent Claim
14 words
The process of claim 5, wherein said butylglycosides and butyloligoglycosides are butylglucosides and butyloligoglucosides.
Claim 8
Dependent Claim
18 words
The process of claim 1, wherein 0.5-10 moles of said alcohol are used per mole of saccharide unit.
Claim 9
Dependent Claim
18 words
The process of claim 7, wherein 1-5 moles of said alcohol are used per mole of saccharide unit.
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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) | 1992-09-11 | 1993-03-13 | 1993-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-11 | 1997-03-13 | 1997-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-11 | 2001-03-13 | 2001-09-12 | $7700.00 | Window Closed / Lapsed |