US4853168A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for spinning starch fibers
Assignee: Ingredion Inc
•
Filing: 1987-12-23
•
Granted: 1989-08-01
•
Expires: 2007-12-23
Abstract
Abstract Raw starch is slurried in an aqueous solution containing up to and above saturation levels of an ammonium sulfate, ammonium monobasic or dibasic phosphate, sodium sulfate or mixtures thereof. The slurry is then cooked at temperatures above about 150° C. The resulting starch cook is then extruded using conventional methods into a coagulating salt bath thereby producing a starch fiber. When the starch is cooked in the presence of a salt prior to spinning in the coagulation bath, dilution of the salt in the coagulation bath is minimized, thus reducing the evaporation load.
Inventors
- 👤 James Eden
- 👤 Ralph M. Trksak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:27
CPC Classifications
D; D01; D01F; D01F9/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
98 words
In a method for the production of starch fibers wherein a stabilized colloidal dispersion of starch is extruded into a moving coagulating salt bath containing a salt selected from the group consisting of ammonium sulfate, ammonium sulfamate, mono-basic ammonium phosphate, di-basic ammonium phosphate, sodium sulfate and mixtures thereof, the improvement which comprises adding 1 to 130% by weight of a salt selected from the group consisting of ammonium sulfate, ammonium sulfamate, ammonium monobasic or dibasic phosphate, sodium sulfate and mixtures thereof, to an aqueous starch slurry; and cooking the starch slurry to form the colloidal dispersion of starch.
Claim 2
Dependent Claim
98 words
In a method for the production of starch fibers wherein a stabilized colloidal dispersion of starch is extruded into a moving coagulating salt bath containing a salt selected from the group consisting of ammonium sulfate, ammonium sulfamate, mono-basic ammonium phosphate, di-basic ammonium phosphate, sodium sulfate and mixtures thereof, the improvement which comprises adding 1 to 130% by weight of a salt selected from the group consisting of ammonium sulfate, ammonium sulfamate, ammonium monobasic or dibasic phosphate, sodium sulfate and mixtures thereof, to an aqueous starch slurry; and cooking the starch slurry to form the colloidal dispersion of starch.
Claim 3
Dependent Claim
22 words
The method of claim 1 wherein the same salt is used in the starch slurry as is present in the coagulation bath.
Claim 4
Dependent Claim
17 words
The method of claim 1 wherein a saturated solution of salt is used in the starch slurry.
Claim 5
Dependent Claim
43 words
The method of claim 1 wherein there is additionally present in the starch slurry a salt selected from the group consisting of ammonium persulfate, ammonium carbonate, ammonium bromide, ammonium bisulfate, ammonium nitrate, ammonium bicarbonate, ammonium oxalate, sodium chloride, potassium chloride and potassium sulfate.
Claim 6
Dependent Claim
12 words
The method of claim 1 wherein the salt used is ammonium sulfate.
Claim 7
Dependent Claim
11 words
The method of claim 1 wherein the starch is corn starch.
Claim 8
Dependent Claim
13 words
The method of claim 1 wherein the starch is a high amylose starch.
Claim 9
Dependent Claim
13 words
The method of claim 3 wherein the starch slurry additionally contains undissolved salt.
References Cited (Backward Citations)
US2369847A
Cited
US2809895A
Cited
US3041180A
Cited
US2902336A
Cited
US3030667A
Cited
US3116351A
Cited
GB1072795A
Cited
US3336429A
Cited
US3499962A
Cited
US3514298A
Cited
US3786123A
Cited
US3971852A
Cited
US3922354A
Cited
US4344857A
Cited
US4277364A
Cited
US4139699A
Cited
US4243480A
Cited
US4276312A
Cited
US4230687A
Cited
US4242364A
Cited
US4382813A
Cited
US4331689A
Cited
US4439488A
Cited
EP0145846A2
Cited
US4657582A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-07-31 | 1993-01-30 | 1993-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-31 | 1997-01-30 | 1997-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-31 | 2001-01-30 | 2001-08-01 | $7700.00 | Window Closed / Lapsed |