US4238604A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing an odor-free acetylated starch
Assignee: General Foods Corp
•
Filing: 1978-10-06
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Granted: 1980-12-09
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Expires: 1998-10-06
Abstract
Abstract A process for making an acetylated cross-linked starch substantially free of acetyl odor and flavor which comprises cross-linking a starch in a slurry, acetylating the cross-linked starch to an acetyl substitution of not more than 2.5%, thereafter washing the starch sufficiently to reduce the ash content to less than 0.20%, preferably forming a slurry of the acetylated cross-linked starch and adjusting the pH to 7 to 9.0, and thereafter drying the starch. The process provides a starch product which is substantially free from off odors or flavors and particularly useful in pudding formulations. Tapioca starch is utilized in preferred embodiments.
Inventors
- 👤 Jay H. Katcher
- 👤 Joseph A. Ackilli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:15
CPC Classifications
C; C08; C08B; C08B31/00; C08B31/003; C08B31/006; C08B31/02; C08B31/04
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
57 words
A process for making a dry acetylated cross-linked starch in which the formation of the acetyl odor and flavor are reduced or eliminated, which comprises: cross-linking and acetylating a starch to an acetyl substitution of not more than 2.5%, thereafter washing the starch sufficiently to reduce the ash content to below 0.20%, and thereafter drying the starch.
Claim 2
Dependent Claim
57 words
A process for making a dry acetylated cross-linked starch in which the formation of the acetyl odor and flavor are reduced or eliminated, which comprises: cross-linking and acetylating a starch to an acetyl substitution of not more than 2.5%, thereafter washing the starch sufficiently to reduce the ash content to below 0.20%, and thereafter drying the starch.
Claim 3
Dependent Claim
34 words
Process of claim 1 further comprising forming a slurry of the acetylated cross-linked starch prior to drying and adjusting the pH of the starch slurry to within the range of about 7.0 to 9.0.
Claim 4
Dependent Claim
13 words
Process of claim 2 wherein said acetyl substitution is not more than 2.4%.
Claim 5
Dependent Claim
17 words
Process of claim 3 wherein said acetyl substitution is within the range of about 2.1 to 2.4%.
Claim 6
Dependent Claim
17 words
Process of claims 1 or 3 wherein said ash content is reduced to or below about 0.15%.
Claim 7
Dependent Claim
14 words
Process of claim 2 wherein said pH is adjusted to about 8.0 to 8.5.
Claim 8
Dependent Claim
9 words
Process of claim 2 wherein said starch is tapioca.
Claim 9
Dependent Claim
13 words
Process of claim 2 wherein at least two separate washing steps are employed.
Claim 10
Dependent Claim
17 words
Process of claim 8 wherein the washing is carried out on a centrifuge and a filter wheel.
Claim 11
Dependent Claim
15 words
Process of claim 2 wherein the starch slurry is gelatinized and dried by drum drying.
Claim 12
Dependent Claim
17 words
Process of claim 2 wherein the ungelatinized starch is dried to produce an acetylated cross-linked ungelatinized starch.
Claim 13
Dependent Claim
27 words
Process of claims 10 or 11 further comprising grinding the dried starch to a size wherein the starch particles pass through a 100 mesh U.S. Standard screen.
Claim 14
Dependent Claim
20 words
Process of claim 2 wherein the pH of the starch slurry is adjusted after the acetylated cross-linked starch is washed.
Claim 15
Dependent Claim
12 words
Product made according to the process of claims 1, 2, or 7.
Claim 16
Dependent Claim
9 words
Product made according to the process of claim 5.
Claim 17
Dependent Claim
9 words
Product made according to the process of claim 12.
References Cited (Backward Citations)
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US2845417A
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US3081296A
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US3238193A
Cited
US3839320A
Cited
US4048435A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-12-09 | 1984-06-09 | 1984-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-09 | 1988-06-09 | 1988-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-09 | 1992-06-09 | 1992-12-09 | $7700.00 | Window Closed / Lapsed |