US3640847A
Expired / Lapsed
US
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Procedure for production of alpha-cyclodextrin
Assignee: Unilever Bestfoods North America
•
Filing: 1969-02-19
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Granted: 1972-02-08
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Expires: 1989-02-19
Abstract
Abstract A process for producing alpha-cyclodextrin which comprises subjecting a gelatinized solution of starch to the action of a cyclodextrin transglycosylase enzyme in the presence of an alphacyclodextrin complexant and recovering an alpha-cyclodextrin product. A specific class of suitable alpha-cyclodextrin complexants usable in practicing the invention is that class of compounds which contain a saturated or unsaturated aliphatic radical with a longest straight chain carbon skeleton at least eight carbon atoms in length bonded at one end of said longest straight chain to an electronegative atom at least as electronegative as sulfur.
Inventors
- 👤 Frederick Carl Armbruster
- 👤 William Arthur Jacaway Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:04
CPC Classifications
C; C08; C08B; C08B37/00; C08B37/0006; C08B37/0009; C08B37/0012; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/832
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
18 words
The process in accordance with claim 1 wherein said alpha-cyclodextrin complexant is selected from the group consisting of
Claim 2
Dependent Claim
13 words
The process in accordance with claim 2 wherein said alpha-cyclodextrin complexant is 1-decanol.
Claim 3
Dependent Claim
48 words
The process in accordance with claim 2 wherein said gelatinized starch is subjected to the enzymatic action at a temperature falling within the range of from about 40* C. to about 65* C. and at a pH falling within the range of from about 5 to about 8.
Claim 4
Dependent Claim
26 words
The process in accordance with claim 4 wherein said starch is selected from the group consisting of unmodified starch, thinned starch, modified starch and mixtures thereof.
Claim 5
Dependent Claim
15 words
The process in accordance with claim 6 wherein said starch is an enzyme thinned starch.
Claim 6
Dependent Claim
77 words
A process for producing alpha-cyclodextrin comprising: a. providing a gelatinized starch solution; b. adding a cyclodextrin transglycosylase enzyme to said solution; c. adding to said solution an alpha-cyclodextrin complexant which contains a saturated or unsaturated aliphatic radical with a longest straight chain at least eight carbon atoms in length bonded at one end of said longest straight chaIn to an atom at least as electronegative as sulfur; d. incubating said solution; and recovering a product containing alpha-cyclodextrin.
Claim 7
Dependent Claim
48 words
The process in accordance with claim 7 wherein said alpha-cyclodextrin complexant contains a saturated or unsaturated aliphatic radical with a longest straight chain at least eight carbon atoms in length bonded at one end of said longest straight chain to an atom at least as electronegative as sulfur.
Claim 8
Dependent Claim
18 words
The process in accordance with claim 7 wherein said alpha-cyclodextrin complexant is selected from the group consisting of
Claim 9
Dependent Claim
48 words
The process in accordance with claim 9 wherein said gelatinized starch is subjected to the enzymatic action at a temperature falling within the range of from about 40* C. to about 65* C. and at a pH falling within the range of from about 5 to about 8.
Claim 10
Dependent Claim
26 words
The process in accordance with claim 10 wherein said starch is selected from the group consisting of unmodified starch, modified starch, thinned starch and mixtures thereof.
References Cited (Backward Citations)
US3425910A
Cited
US3541077A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-07 | 1975-08-09 | 1976-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-07 | 1979-08-09 | 1980-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-07 | 1983-08-09 | 1984-02-08 | $7700.00 | Window Closed / Lapsed |