US3974138A
Expired / Lapsed
US
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Method of preparing butyl polyglycosides
Assignee: Zeneca Inc
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Filing: 1974-09-30
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Granted: 1976-08-10
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Expires: 1994-09-30
Abstract
Abstract An improved method of preparing butyl polyglycosides wherein the average number of monosaccharide units in the polyglycoside may be controlled is disclosed. The method comprises refluxing, in the presence of an acid catalyst, a mixture of butanol and a monosaccharide wherein the mol ratio of butanol to monosaccharide is equal to from about 1 to about 25 and subsequently distilling off part of the butanol to reduce the mol ratio of butanol to monosaccharide to from 0.6 to 20.
Inventors
- 👤 Baak W. Lew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:47
CPC Classifications
C; C07; C07H; C07H15/00; C07H15/02; C07H15/04; C07H3/00; C07H3/06
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
124 words
A method of preparing a butyl polyglycoside having a degree of glycosidation equal to from 1.1to about 4, said method comprising a. combining butyl alcohol and a monosaccharide selected from the group consisting of pentoses and hexoses at a molar ratio of butyl alcohol to monosaccharide equal to from 1 to about 25, b. refluxing the resulting mixture in the presence of an acid catalyst, and c. subsequently distilling butyl alcohol from the reaction mixture to reduce the molar ratio of butyl alcohol to monosaccharide to a final ratio equal to from about 0.6 to about 20, provided that (i) if the initial molar ratio is equal to from 1 to 5, the distillation of butanol is started prior to the point of sirupization.
Claim 2
Independent Claim
124 words
A method of preparing a butyl polyglycoside having a degree of glycosidation equal to from 1.1to about 4, said method comprising a. combining butyl alcohol and a monosaccharide selected from the group consisting of pentoses and hexoses at a molar ratio of butyl alcohol to monosaccharide equal to from 1 to about 25, b. refluxing the resulting mixture in the presence of an acid catalyst, and c. subsequently distilling butyl alcohol from the reaction mixture to reduce the molar ratio of butyl alcohol to monosaccharide to a final ratio equal to from about 0.6 to about 20, provided that (i) if the initial molar ratio is equal to from 1 to 5, the distillation of butanol is started prior to the point of sirupization.
Claim 3
Dependent Claim
12 words
A method, as claimed in claim 1, wherein the monosaccharide is glucose.
Claim 4
Dependent Claim
26 words
A method, as claimed in claim 1, wherein the initial molar ratio of butyl alcohol to monosaccharide is equal to from about 5 to about 25.
Claim 5
Dependent Claim
18 words
A method, as claimed in claim 3, wherein the reaction mixture is refluxed until a clear solution results.
Claim 6
Dependent Claim
26 words
A method, as claimed in claim 1, wherein the initial molar ratio of butyl alcohol to glucose is equal to from about 1 to about 5.
Claim 7
Dependent Claim
25 words
A method, as claimed in claim 1, wherein the molar ratio is reduced to a final ratio equal to from about 1.2 to about 20.
Claim 8
Dependent Claim
29 words
A method, as claimed in claim 6, comprising a. adding additional butyl alcohol to the reaction mixture after the reduced ratio is reached, and b. refluxing the reaction mixture.
Claim 9
Dependent Claim
30 words
A method, as claimed in claim 1, wherein the reaction is terminated by the addition of an alkaline material to the reaction mixture when the reduced molar ratio is reached.
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) | 1979-08-10 | 1980-02-09 | 1980-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-10 | 1984-02-09 | 1984-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-10 | 1988-02-09 | 1988-08-10 | $7700.00 | Window Closed / Lapsed |