US4939246A
Expired / Lapsed
US
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Purification of long-chain alkylglucosides
Assignee: BASF SE
•
Filing: 1989-02-13
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Granted: 1990-07-03
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Expires: 2009-02-13
Abstract
Abstract Long-chain alkylglucosides are purified by extraction with water from reaction mixtures obtainable by reacting monosaccharides and alcohols of 8 or more carbon atoms or by transacetalating short-chain alkylglucosides with alcohols of 8 or more carbon atoms, adjusted to a pH above 6 in either case.
Inventors
- 👤 Richard Baur
- 👤 Jochen Houben
- 👤 Hans-Ulrich Jaeger
- 👤 Alfred Oftring
- 👤 Johannes Perner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:09
CPC Classifications
C; C07; C07H; C07H15/00; C07H15/02; C07H15/04
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
91 words
A process for purifying a long-chain alkylglucoside by extraction from a reaction mixture, obtained (i) by reacting a monosaccharide and an alcohol of 8 or more carbon atoms or (ii) by transacetalating a C 1 -C 6 -alkylglucoside with an alcohol or 8 or more carbon atoms, and in either case, adjusted to a pH above 6, which process comprises extracting the long-chain alkylglucoside from said reaction mixture with water, wherein one part by volume of said reaction mixture is extracted with from 0.5 to 4 parts by volume of water.
Claim 2
Dependent Claim
91 words
A process for purifying a long-chain alkylglucoside by extraction from a reaction mixture, obtained (i) by reacting a monosaccharide and an alcohol of 8 or more carbon atoms or (ii) by transacetalating a C 1 -C 6 -alkylglucoside with an alcohol or 8 or more carbon atoms, and in either case, adjusted to a pH above 6, which process comprises extracting the long-chain alkylglucoside from said reaction mixture with water, wherein one part by volume of said reaction mixture is extracted with from 0.5 to 4 parts by volume of water.
Claim 3
Dependent Claim
19 words
The process of claim 1, wherein said reaction mixture being extracted has a pH of from 7.5 to 9.
Claim 4
Dependent Claim
16 words
The process of claim 1, wherein said reaction mixture is extracted continuously 2 to 4 times.
Claim 5
Dependent Claim
20 words
The process of claim 1, wherein said extraction is carried out at a temperature of from 40 to 60° C.
Claim 6
Dependent Claim
24 words
The process of claim 1, wherein said monosaccharide is glucose, manose, galactose, talose, allose, altrose, idose, arabinose, xylose, ribose, lyxose, or a mixture thereof.
Claim 7
Dependent Claim
15 words
The process of claim 1, wherein said alcohol contains from 8 to 32 carbon atoms.
Claim 8
Dependent Claim
15 words
The process of claim 1, wherein said alcohol contains from 12 to 18 carbon atoms.
Claim 9
Dependent Claim
27 words
The process of claim 1, wherein one part by volume of said reaction mixture is extracted with from 2 to 3 parts by volume of said water.
Claim 10
Dependent Claim
20 words
The process of claim 1, wherein said extraction is carried out at a temperature of from 50 to 55° C.
References Cited (Backward Citations)
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US3839318A
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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) | 1993-07-02 | 1994-01-01 | 1994-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-02 | 1998-01-01 | 1998-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-02 | 2002-01-01 | 2002-07-03 | $7700.00 | Window Closed / Lapsed |