US4440792A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for preventing gelation of corn steep liquor
Assignee: Staley Continental Inc
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Filing: 1982-09-07
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Granted: 1984-04-03
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Expires: 2002-09-07
Abstract
Abstract The "livering" or gelling of corn steep liquor or liquid products containing corn steep liquor is prevented or reversed by the addition of an effective amount of a calcium complexing agent, preferably at a pH of less than about 3.8.
Inventors
- 👤 Marion M. Bradford
- 👤 Frank T. Orthoefer
- 👤 Kenneth N. Wright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:04
CPC Classifications
A; A23; A23K; A23K10/00; A23K10/30; A23K10/37; Y; Y02; Y02P; Y02P60/00; Y02P60/80; Y02P60/87
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
41 words
A method of treating corn steep liquor (CSL) or a liquid CSL composition which comprises the adding to the liquor or composition a Ca++ complexing agent in an amount effective to prevent or reverse the gelling of said corn steep liquor.
Claim 2
Independent Claim
41 words
A method of treating corn steep liquor (CSL) or a liquid CSL composition which comprises the adding to the liquor or composition a Ca++ complexing agent in an amount effective to prevent or reverse the gelling of said corn steep liquor.
Claim 3
Dependent Claim
35 words
The method of claim 1 wherein the pH of the corn steep liquor or liquid CSL composition is adjusted to below about 3.8 prior to, during, or after the addition of the Ca++ complexing agent.
Claim 4
Dependent Claim
48 words
The method of claim 1 or claim 2 wherein the Ca++ complexing agent is a soluble or partially soluble source of a Ca++ complexing anion selected from the group consisting of phytate, citrate, oxalate, phosphate, metaphosphate, polyphosphate, phosphite and Ca++ complexing anions derived from EDTA, EGTA and NTA.
Claim 5
Dependent Claim
26 words
The method of claim 3 wherein the Ca++ complexing agent is an ammonium or alkali metal salt of a conjugate acid of a Ca++ complexing anion.
Claim 6
Dependent Claim
19 words
The method of claim 3 wherein the Ca++ complexing agent is a conjugate acid of a Ca++ complexing anion.
Claim 7
Dependent Claim
38 words
The method of claim 3 wherein about 1 to about 15% by weight, based on the weight of the corn steep liquor, of the Ca++ complexing agent is added to the corn steep liquor or liquid CSL composition.
Claim 8
Dependent Claim
19 words
The method of claim 6 wherein the Ca++ complexing agent is a soluble or partially soluble source of phosphate.
Claim 9
Dependent Claim
22 words
The method of claim 7 wherein the source of phosphate is an ammonium or alkali metal mono-, di- or tribasic phosphate salt.
Claim 10
Dependent Claim
28 words
The method of claim 8 wherein the pH of the corn steep liquor or the liquid containing corn steep liquor is adjusted to about 1.5 to about 3.5.
Claim 11
Dependent Claim
46 words
The method of claim 9 wherein following the pH adjustment and the addition of the phosphate salt, the corn steep liquor or liquid CSL composition is agitated for about 1 to 60 minutes after which time its pH is adjusted to about 3.8 to about 4.5.
Claim 12
Dependent Claim
13 words
The method of claim 7 wherein the Ca++ complexing agent is phosphoric acid.
Claim 13
Dependent Claim
28 words
The method of claim 11 wherein about 3 to about 12% by weight phosphoric acid is added to the corn steep liquor or to the liquid CSL composition.
Claim 14
Dependent Claim
29 words
The method of claim 12 wherein the pH of the corn steep liquor or liquid CSL composition is adjusted to about 3.8 to about 4.5 following phosphoric acid addition.
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) | 1987-04-03 | 1987-10-03 | 1988-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-03 | 1991-10-03 | 1992-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-03 | 1995-10-03 | 1996-04-03 | $7700.00 | Window Closed / Lapsed |