Solvent extraction of oil from oil seeds

• US 4,008,210 A
• Filed: 11/05/1974
• Issued: 02/15/1977
• Est. Priority Date: 11/05/1974
• Status: Expired due to Term

• Current Assignee: Gold Kist, Inc.
• Original Assignee: Gold Kist, Inc.
• Inventors: Ayres, James L., Hunt, Charles T., Barr, Douglas R., Steele, Bobby C.
• Primary Examiner(s): Garvin, Patrick P.
• Assistant Examiner(s): Konopka, P. E.
• Application Number:
  US05/521,145
• Time in Patent Office: 833 Days
• Field of Search: 260/412.4, 260/123.5, 426/430, 426/457
• US Class Current: 530/377
• CPC Class Codes: C11B 1/04 of vegetable raw material C11B1/025 takes precedence

Abstract

The present invention provides a method for the direct solvent extraction of oil from oil seeds to produce a low-fat proteinaceous material which comprises, wet heat conditioning oil bearing seeds to a moisture content of from 6 to 12%, flaking said wet heat conditioned oil seeds, dry heat conditioning said flaked oil seeds to a moisture content of from 1.9 to 6%, and treating said dry heat conditioned flakes with a solvent for the removal of the oil contained in said flakes.

Claims

1. A method for the direct solvent extraction of oil from peanuts to produce a low-fat proteinaceous material which comprises, wet heat conditioning at a temperature of from 160°

to 240°

F whole peanuts, peanut splits, peanut granules, or cracked peanuts to a moisture content of more than 6 but less than 12%, flaking said wet heat conditioned peanuts, dry heat conditioning said flaked peanuts to a moisture content of from 1.9 to 6% and treating said dry heat conditioned flakes with a solvent selected from the group consisting of alcohols, ketones, hydrocarbons, and halogenated hydrocarbons, for the removal of oil contained in said flakes.

2. The method of claim 1 wherein the wet heat condition is affected at a temperature of from 160°

to 240°

F for from 2 to 45 minutes.

3. The method of claim 1 wherein the peanuts are whole peanuts.

4. The method of claim 1 wherein the peanuts are peanut splits.

5. The method of claim 1 wherein the peanuts are peanut granules.

6. The method of claim 1 wherein the peanuts are cracked peanuts.

7. The method of claim 1 wherein the solvent is hexanes.

8. The method of claim 1 wherein said solvent is acetone, ethyl alcohol, isopropyl alcohol, methylene chloride, trichloroethane, trichloroethylene, tetrachloroethylene, fluorinated hydrocarbons or chlorinated hydrocarbons.

9. The method of claim 1 wherein the wet heat conditioned peanuts are cooled prior to flaking.

10. The method of claim 1 wherein the flakes are treated with a solvent in a stationary bed extraction.

11. The method of claim 1 wherein the flakes are treated with a solvent in a counter flow process.

12. The method of claim 1 wherein the flakes are treated with a solvent in a cross flow process.

13. The method of claim 1 wherein the flakes are treated with the solvent under vacuum.

14. The method of claim 1 wherein the temperature of the solvent is maintained at a temperature of about 140°

F.

15. The method of claim 1 wherein the flakes are treated with a solvent which is maintained at a temperature of between 75°

and 140°

F.

16. The method of claim 1 wherein the flakes are treated with a solvent which comprises a mixture of solvents for the removal of oil in the peanut.

17. The method of claim 1 wherein the peanuts are blanched peanuts.

18. The method of claim 1 wherein the peanuts are unblanched peanuts.

19. The method of claim 1 wherein the dry heat conditioning is performed by rapid drying using a forced heating system to yield the product with a final moisture content of from 2.5 to 4%.

20. The method of claim 1 wherein the wet heat conditioning is affected at a temperature of from 200°

to 220°

F for 10 to 20 minutes to wet heat condition the peanuts to a moisture content of from 8 to 11% prior to flaking.

21. The method of claim 1 wherein the wet heat conditioning plasticizes the oil seed meat while keeping protein denaturation at a minimum.