Claims
- 1. A process for extracting oleaginous seed material comprised of non-oil lipids and lipids to prepare a protein flour therefrom which comprises:
- (a) countercurrently contacting said seed material with a first concentrated solution of an alcohol in water to extract water, most of said non-oil lipids and some of said lipids;
- (b) withdrawing a miscella from step (a);
- (c) countercurrently contacting the seed material from step (a) with a second concentrated solution of said alcohol in water to extract substantially all of said lipids;
- (d) withdrawing a lipid-rich miscella from step (c);
- (e) cooling said lipid-rich miscella to separate a solvent phase and a lipid phase;
- (f) returning all or a large portion of said solvent phase to the process and withdrawing said lipid phase and the remaining small portion, if any, of said solvent phase from the process; and
- (g) desolventizing the seed material from step (c) to yield a low-lipid protein flour.
- 2. The process as defined in claim 1 wherein the temperature in step (c) is about the boiling point of said second concentrated solution of said alcohol in water.
- 3. The process as defined in claim 1 wherein said alcohol is selected from the group consisting of monohydric aliphatic alcohols having from 1 to 4 carbon atoms.
- 4. The process as defined in claim 3 wherein said alcohol is ethanol.
- 5. The process as defined in claim 4 wherein said oleaginous material is soybean.
- 6. The proteinaceous product produced by the process of claim 5.
- 7. The process as defined in claim 1 wherein said first concentrated solution of an alcohol in water is constituted of all of said solvent phase returned to said process in step (f).
- 8. The process as defined in claim 7 wherein said oleaginous material is soybeans and said second concentrated solution is a solution of ethanol in water containing in excess of 92% ethanol by weight.
- 9. The proteinaceous product produced by the process of claim 8.
- 10. The process as defined in claim 1 wherein said first concentrated solution of an alcohol in water is a portion of the solvent phase returned to said process in step (f), and the other portion recycles to a zone in step (c) intermediate the point of entry of said second concentrated solution and the point of withdrawal of said liquid-rich miscella.
- 11. The process as defined in claim 10 wherein said oleaginous material is soybeans and said second concentrated solution is a solution of ethanol in water containing less than 94% ethanol by weight.
- 12. The proteinaceous product produced by the process of claim 11.
- 13. The process as defined by claim 1 wherein the seed material from step (a) is treated prior to step (c) with a concentrated, undistilled, recycled alcohol to partially removed said lipids and wherein a resulting lipid-rich miscella is combined with the lipid-rich miscella of step (c) prior to step (d).
- 14. The process as defined in claim 13 wherein said concentrated, undistilled, recycled solvent is at a temperature of about the boiling point thereof.
- 15. The product produced by the process of claim 14.
- 16. The process as defined in claim 1 wherein said seed material prior to step (a) is contacted with relatively dilute aqueous alcohol to remove some carbohydrates in said seed material.
- 17. The process as defined in claim 13 wherein said seed material prior to step (a) is contacted with relatively dilute aqueous alcohol to remove some carbohydrates in said seed material.
- 18. The process as defined in claim 17 wherein said concentrate solution of alcohol of step (c) is distilled concentrated alcohol.
- 19. The process as defined in claim 18 wherein said distilled concentrated alcohol is at a temperature near the boiling point thereof.
- 20. The product produced by the process of claim 19.
Parent Case Info
This application is a continuation-in-part of copending U.S. application Ser. No. 611,066 filed Sept. 8, 1975.
US Referenced Citations (3)
Number |
Name |
Date |
Kind |
2635094 |
Belter et al. |
Apr 1953 |
|
3734901 |
Hayes et al. |
May 1973 |
|
3966982 |
Becker et al. |
Jun 1976 |
|
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
611066 |
Sep 1975 |
|