US4820814A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing colorless butyloligoglycosides
Assignee: Huels AG
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Filing: 1987-04-21
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Granted: 1989-04-11
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Expires: 2007-04-21
Abstract
Abstract The dark-colored solutions obtained in the preparation of butyloligoglycosides from saccharides and butanol are adjusted to an acidity of 0 to 12 mg of KOH/g. Colorless or light-colored butyloligoglycosides are then extracted from them by water, optionally after the addition of a nonpolar solvent, and are then isolated from the aqueous phase in a conventional way.
Inventors
- 👤 Harald Lueders
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:31
CPC Classifications
C; C07; C07H; C07H15/00; C07H15/02; C07H15/04; C07H3/00; C07H3/06
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
85 words
A process for producing colorless or light colored butylglycosides or butyloligoglycosides from a crude butylglycoside or butyloligoglycoside reaction product containing colored impurities, comprising the steps of: adjusting the acid number of said crude reaction product to 0-12 mg KOH/g by adding an acid or base to said reaction product; extracting said adjusted reaction produve with water to produce a water extract containing said butylglycosides or butyloligoglycosides and a residual crude produce containing the colored impurities; and isolating said butylglycoside or butyloligoglycoside from said water extract.
Claim 2
Dependent Claim
85 words
A process for producing colorless or light colored butylglycosides or butyloligoglycosides from a crude butylglycoside or butyloligoglycoside reaction product containing colored impurities, comprising the steps of: adjusting the acid number of said crude reaction product to 0-12 mg KOH/g by adding an acid or base to said reaction product; extracting said adjusted reaction produve with water to produce a water extract containing said butylglycosides or butyloligoglycosides and a residual crude produce containing the colored impurities; and isolating said butylglycoside or butyloligoglycoside from said water extract.
Claim 3
Dependent Claim
26 words
The process of claim 1, further comprising adding up to 2 parts of a hydrophobic solvent per part of crude reaction produce before said adjusting step.
Claim 4
Dependent Claim
18 words
The process of claim 1, wherein said crude reaction product is a reaction product of saccharides and n-butanol.
Claim 5
Dependent Claim
15 words
The process of claim 1, wherein said acid number is adjusted to 0.01-3 mg KOH/g.
Claim 6
Dependent Claim
15 words
The process of claim 4, wherein said acid number is adjusted to 0.05-1 mg KOH/g.
Claim 7
Dependent Claim
21 words
The process of claim 2, wherein two parts of said hydrophobic solvent are added per one part of said crude product.
Claim 8
Dependent Claim
13 words
The process of claim 2, wherein said hydrophobic solvent is an aromatic hydrocabon.
Claim 9
Dependent Claim
23 words
The process of claim 7, wherein said aromatic hydrocarbon is a member selected from the group consisting of toluene, xylene and mixtures thereof.
Claim 10
Dependent Claim
19 words
The process of claim 1, further comprising neutralizing said water extract with a base or a basic ion exchanger.
Claim 11
Dependent Claim
15 words
The process of claim 9, further comprising treating said neutralized water extract with activated charcoal.
Claim 12
Dependent Claim
12 words
The process of claim 1, wherein said extracting step is performed continuously.
Claim 13
Dependent Claim
14 words
The process of claim 1 wherein said butylglycosides and butyloligoglycosides are butylglucosides and bulyloligoglucosides.
Claim 14
Dependent Claim
22 words
The process of claim 1, wherein said extracting step is conducted with 1-15 parts of water per part of crude reaction product.
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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) | 1992-04-10 | 1992-10-10 | 1993-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-10 | 1996-10-10 | 1997-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-10 | 2000-10-10 | 2001-04-11 | $7700.00 | Window Closed / Lapsed |