US3897574A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of ethanol extractant in soy protein concentrate process
Assignee: Central Soya Co Inc
•
Filing: 1974-03-21
•
Granted: 1975-07-29
•
Expires: 1994-03-21
Abstract
Abstract A process for recovery of ethanol from a soy protein extraction process wherein odor and flavor contaminents are removed from a zone in a tray-type rectifying column.
Inventors
- 👤 Darryl W Pass
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:16
CPC Classifications
A; A23; A23J; A23J1/00; A23J1/14; A23J1/142; A23L; A23L11/00; A23L11/30; A23L11/32
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
128 words
IN THE PROCESS OF DEFATTED SOYBEAN FLAKES TO PRODUCE SOY PROTEIN CONCENTRATE HAVING A MINIMUM OF 70% PROTEIN (NX 6.25) ON A MOISTURE-FREE BASIS, THE STEPS OF CONTACTING DEFATTED SOYBEAN FLAKES WITH ETHANOL OF A CONCENTRATION OF ABOUT TO 60 TO 80% ETHANOL TO EXTRACT THE SOLUBLE SOLIDS FROM SAID DEFATTED SOYBEAN FLAKES AND STRIPPING AQUEOUS ETHANOL FROM SAID EXTRACT, INTRODUCING THE RESULTANT AQUEOUS ETHANOL SOLUTION INTO A TRAY-TYPE COLUMN FOR RECTIFICATION TO PROVIDE RECTIFIED ETHANOL AT THE COLUMN TOP AND WASTE WATER AT THE COLUMN BOTTOM, WITHDRAWING AT LEAST PRIODICALLY A PORTION OF SAID ETHANOL SOLUTION FROM A POINT INTERMEDIATE THE COLUMN HEIGHT TO REMOVE MALODOROUS CONTAIMNANTS FROM SAID ETHANOL SOLUTION, AND RECYCLING THE RECTIFIED ETHANOL INTO CONTACT WITH DEFATTED SOYBEAN FLAKES AND REMOVING SAID WASTE WATER.
Claim 2
Dependent Claim
128 words
IN THE PROCESS OF DEFATTED SOYBEAN FLAKES TO PRODUCE SOY PROTEIN CONCENTRATE HAVING A MINIMUM OF 70% PROTEIN (NX 6.25) ON A MOISTURE-FREE BASIS, THE STEPS OF CONTACTING DEFATTED SOYBEAN FLAKES WITH ETHANOL OF A CONCENTRATION OF ABOUT TO 60 TO 80% ETHANOL TO EXTRACT THE SOLUBLE SOLIDS FROM SAID DEFATTED SOYBEAN FLAKES AND STRIPPING AQUEOUS ETHANOL FROM SAID EXTRACT, INTRODUCING THE RESULTANT AQUEOUS ETHANOL SOLUTION INTO A TRAY-TYPE COLUMN FOR RECTIFICATION TO PROVIDE RECTIFIED ETHANOL AT THE COLUMN TOP AND WASTE WATER AT THE COLUMN BOTTOM, WITHDRAWING AT LEAST PRIODICALLY A PORTION OF SAID ETHANOL SOLUTION FROM A POINT INTERMEDIATE THE COLUMN HEIGHT TO REMOVE MALODOROUS CONTAIMNANTS FROM SAID ETHANOL SOLUTION, AND RECYCLING THE RECTIFIED ETHANOL INTO CONTACT WITH DEFATTED SOYBEAN FLAKES AND REMOVING SAID WASTE WATER.
Claim 3
Dependent Claim
42 words
The method of claim 1 in which said portion is removed continuously and water added thereto, the water-augmented portion subjected to separation into a contaminant-containing part and a part substantially free of contaminants, the latter part being returned continuously to said column.
Claim 4
Dependent Claim
29 words
The method of claim 1 in which said portion is withdrawn from a point in said column having a temperature in the range of about 180*F. to about 205*F.
Claim 5
Dependent Claim
29 words
The method of claim 1 in which said portion is withdrawn from a point approximately 40% to about 50% of the height of the column above the bottom thereof.
References Cited (Backward Citations)
US2017067A
Cited
US2801211A
Cited
US3043826A
Cited
US3230156A
Cited
US3265594A
Cited
US3365440A
Cited
US3406100A
Cited
US3445345A
Cited
US3520868A
Cited
US3721569A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-28 | 1979-01-27 | 1979-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-28 | 1983-01-27 | 1983-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-28 | 1987-01-27 | 1987-07-29 | $7700.00 | Window Closed / Lapsed |