Patent US4990605A successfully refreshed from Google Patents.
US4990605A
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Method of manufacturing alkyloligoglycosides
Assignee: Huels AG
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Filing: 1988-05-11
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Granted: 1991-02-05
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Expires: 2008-05-11
Abstract
Abstract A method of manufacturing alkyloligoglycosides. Alkyloligoglycosides and alkylglycosides having alkyl groups with 8 to 24 carbon atoms, which products are of interest as surface active agents in home economics, and in the cosmetics industry, can be manufactured by glycosidation and transglycosidation. Light-colored alkyloligoglycosides and alkylglycosides can be manufactured by treating their solution in alcohols with activated carbon, distilling off the solvent, and bleaching the distillation residue or an aqueous solution of the residue with a peroxide compound.
Inventors
- 👤 Harald Lueders
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:15
CPC Classifications
C; C07; C07H; C07H15/00; C07H15/02; C07H15/04
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
78 words
A method of manufacturing light-colored alkyloligoglycosides and alkylglycosides, comprising the steps of: (i) preparing a neutral or alkaline starting compound mixture, comprising alkylglycosides, alkyloligoglycosides or mixtures thereof and an alcohol solvent; (ii) contacting said mixture with activated carbon at a temperature from 10°-140° C.; (iii) separating said activated carbon from said contacted mixture; (iv) removing said alcohol solvent from said alkylglycosides, alkyloligoglycosides or mixtures thereof; and (v) bleaching said alkylglycosides, alkyloligoglycosides or mixtures thereof with a peroxide compound.
Claim 2
Independent Claim
78 words
A method of manufacturing light-colored alkyloligoglycosides and alkylglycosides, comprising the steps of: (i) preparing a neutral or alkaline starting compound mixture, comprising alkylglycosides, alkyloligoglycosides or mixtures thereof and an alcohol solvent; (ii) contacting said mixture with activated carbon at a temperature from 10°-140° C.; (iii) separating said activated carbon from said contacted mixture; (iv) removing said alcohol solvent from said alkylglycosides, alkyloligoglycosides or mixtures thereof; and (v) bleaching said alkylglycosides, alkyloligoglycosides or mixtures thereof with a peroxide compound.
Claim 3
Dependent Claim
31 words
The method of claim 1, wherein said alkylglycosides and alkyloligoglycosides comprise C 1-6 alkylglycosides and C 1-6 alkyloligoglycosides, and said alcohol solvent comprises at least one or more C 1-6 alcohols.
Claim 4
Dependent Claim
20 words
The method of claim 2, wherein said alkylglycosides and alkyloligoglycosides are butylglucosides and butyloligoglycosides, and said alcohol solvent is n-butanol.
Claim 5
Dependent Claim
29 words
The method of claim 1, wherein said alkylglycosides and alkyloligoglycosides comprise C 8-24 alkylglycosides and C 8-24 alkyloligoglycosides, and said alcohol solvent comprises one at least C 8-24 alcohols.
Claim 6
Dependent Claim
16 words
The method of claim 4, wherein said alkyl glycosides and said alkyloligoglycosides are alkylglucosides and alkyloligoglucosides.
Claim 7
Dependent Claim
21 words
The method of claim 1, wherein said starting compound mixture comprises 10-90 wt. % of said alkylglycosides, alkyloligoglycosides or mixtures thereof.
Claim 8
Dependent Claim
21 words
The method of claim 6, wherein said starting compound mixture comprises 15-40 wt. % of said alkylglycosides, alkyloligoglycosides or mixtures thereof.
Claim 9
Dependent Claim
24 words
The method of claim 1, wherein 0.01-10 wt. % activated carbon based on the weight of said mixture is used in said contacting step.
Claim 10
Dependent Claim
17 words
The method of claim 1, wherein said contacting step is carried out at temperature of 80°-130° C.
Claim 11
Dependent Claim
17 words
The method of claim 1, wherein said bleaching step is conducted with hydrogen peroxide at 50°-100° C.
Claim 12
Dependent Claim
48 words
The method of claim 1, wherein said starting compound mixture comprises C 1-6 alkylglycosides, alkyloligoglycosides or mixtures thereof, said alcohol solvent is a C 8-24 alcohol, and said starting compound mixture is subjected to transglycosidation to prepare C 8-24 alkylglycosides, alkyloligoglycosides, or mixtures thereof before said contacting step.
Claim 13
Dependent Claim
17 words
The method of claim 11, wherein said transglycosidation is carried out at 80°-140° C. for 0.5-4 hours.
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) | 1994-02-04 | 1994-08-06 | 1995-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-02-04 | 1998-08-06 | 1999-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-02-04 | 2002-08-06 | 2003-02-05 | $7700.00 | Window Closed / Lapsed |