IP Library › Granted Patent US 9,061,987
Granted Patent B2
US 9,061,987 · App. 12/877,987 · Granted Jun 23, 2015

Oil composition and method for producing the same

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Quick Facts
Patent No.
US 9,061,987
App. No.
12/877,987
Granted
Jun 23, 2015
Kind
B2
Abstract

This invention relates to a corn oil composition comprising unrefined corn oil having a free fatty acid content of less than about 5 weight percent, and methods for producing the same.

Claims (28)

1. A method for providing a corn oil composition having a free fatty acid content of less than about 2 weight percent and being formulated for use as biodiesel from a first aqueous layer constituting a corn fermentation residue, said method comprising the steps of:

a) obtaining the first aqueous layer from the corn fermentation residue;

b) adjusting the pH of the first aqueous layer to provide a corn oil layer and a second aqueous layer; and

c) separating the corn oil layer from the second aqueous layer to provide the corn oil composition having a free fatty acid content of less than about 2%;

wherein the corn oil composition is formulated for use as biodiesel.

2. The method of claim 1 , wherein the first aqueous layer has a moisture content of between about 95% and about 60%.

3. The method of claim 1 , wherein the first aqueous layer comprises thin stillage.

4. The method of claim 3 , further comprising the step of evaporating the thin stillage prior to the step of adjusting the pH of the first aqueous layer.

5. The method of claim 1 , wherein the first aqueous layer comprises syrup.

6. The method of claim 1 , wherein the step of adjusting the pH comprises adding a base.

7. The method of claim 1 , wherein the step of adjusting the pH comprises adding a base selected from the group consisting of sodium hydroxide, potassium hydroxide, calcium hydroxide, or spent alkali wash solution.

8. The method of claim 1 , wherein the pH of the first aqueous layer is less than about 4 prior to the step of adjusting the pH of the first aqueous layer.

9. The method of claim 1 , wherein the pH of the first aqueous layer is about 3.5 prior to the step of adjusting the pH of the first aqueous layer.

10. The method of claim 1 , wherein the pH of the first aqueous layer is from about 7.5 to about 10 after adjusting the pH of the first aqueous layer.

11. The method of claim 1 , wherein the pH of the first aqueous layer is from about 8 to about 9 after adjusting the pH of the first aqueous layer.

12. The method of claim 1 , wherein the pH of the first aqueous layer is about 8.2 after adjusting the pH of the first aqueous layer.

13. The method of claim 1 , wherein the step of obtaining the first aqueous layer from the corn fermentation residue comprises centrifuging.

14. The method of claim 1 , where the step of obtaining the first aqueous layer from the corn fermentation residue comprises the steps of:

a) separating the first aqueous layer into a water layer and an emulsion layer; and

b) adjusting the pH of the emulsion layer to provide a corn oil layer and a second aqueous layer.

15. The method of claim 14 , wherein the step of obtaining the first aqueous layer from the corn fermentation residue to provide an emulsion layer and a first aqueous layer comprises centrifuging.

16. The method of claim 1 , wherein the step of separating the corn oil layer from the second aqueous layer comprises centrifuging.

17. The method of claim 1 , wherein the corn oil layer comprises a free fatty acid content of less than about 2 weight percent.

18. The method of claim 1 , wherein the corn oil layer comprises a moisture content of from about 0.2 to about 1 weight percent.

19. The method of claim 1 , wherein the corn oil layer comprises an alkali metal ion and/or alkaline metal ion content of greater than 10 parts per million.

20. The method of claim 1 , wherein the corn oil layer has an insoluble content of less than about 1 weight percent.

21. The method of claim 1 , wherein the corn oil layer exhibits a peroxide value of less than about 2 parts per million.

22. The method of claim 1 , wherein the corn oil layer exhibits an oxidative stability of greater than about 4 hours at a temperature of about 110° C.

Assignments (5)
SECURITY INTEREST Recorded Apr 3, 2020
From: POET RESEARCH, INC.
To: COBANK, ACB, AS ADMINISTRATIVE AGENT
Reel/Frame 052312/0801 →
SECURITY INTEREST Recorded Apr 2, 2020
From: POET RESEARCH, INC.
To: JPMORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT
Reel/Frame 052295/0712 →
RELEASE OF SECURITY INTEREST RECORDED AT REEL/FRAME 035603/0778 Recorded Apr 2, 2020
From: JPMORGAN CHASE BANK N.A., AS ADMINISTRATIVE AGENT
To: POET, LLC; POET RESEARCH, INC.; POET PLANT MANAGEMENT, LLC; POET INVESTMENTS, INC.; POET BIOMASS, LLC; POET DESIGN AND CONSTRUCTION, INC.; RISK MANAGEMENT ASSOCIATES, INC.; POET NUTRITION, INC.; POET RESEARCH CENTER, LLC (FORMERLY KNOWN AS POET RESEARCH CENTER, INC.); POET LEASING, LLC; POET NUTRITION INTERNATIONAL, INC.
Reel/Frame 052299/0676 →
RELEASE OF PATENT, TRADEMARK AND COPYRIGHT SECURITY INTEREST Recorded May 6, 2015
From: BOKF, N.A., DBA BANK OF OKLAHOMA
To: POET RESEARCH, INC. F/K/A BROIN AND ASSOCIATES, INC.; POET, LLC F/K/A BROIN COMPANIES, LLC; POET INVESTMENTS, INC. F/K/A BROIN ENTERPRISES, INC.; POET PLANT MANAGEMENT, LLC
Reel/Frame 035603/0610 →
ACKNOWLEDGEMENT OF SECURITY INTEREST IN PATENTS Recorded May 6, 2015
From: POET, LLC; POET RESEARCH, INC.; POET PLANT MANAGEMENT, LLC; POET INVESTMENTS, INC.; POET BIOMASS, LLC; POET DESIGN AND CONSTRUCTION, INC.; RISK MANAGEMENT ASSOCIATES, INC.; POET NUTRITION, INC.; POET RESEARCH CENTER, INC.; POET LEASING, LLC; POET NUTRITION INTERNATIONAL, INC.
To: JPMORGAN CHASE BANK, N.A.
Reel/Frame 035603/0778 →