Blown corn stillage oil

Patent metadata

Field	Value
Publication number	US-9243208-B2
Application number	US-201414294447-A
Country	US
Kind code	B2
Filing date	Jun 3, 2014
Priority date	May 22, 2009
Publication date	Jan 26, 2016
Grant date	Jan 26, 2016

Abstract

Blown corn stillage oils and methods for making blown corn stillage oils are disclosed. In one aspect the corn stillage oils are stripped to reduce the acid value of the resulting blown, stripped corn stillage oil. The method includes heating a corn stillage oil to a temperature of at least 90° C., and passing air through the heated oil to produce a blown corn stillage oil having a viscosity of at least 50 cSt at 40° C. In one aspect, the blown corn stillage oil is stripped to reduce the acid value of the blown, stripped corn stillage oil to 5 mg KOH/gram or less.

First claim

What is claimed is:

1. A method for producing a high viscosity, low volatiles blown-corn stillage oil, the method comprising the steps of:
(a) obtaining a pressure-distilled corn stillage oil;
(b) heating the oil to at least 90° C.;
(c) passing air through the heated oil to produce a blown-corn stillage oil; and
(d) stripping the blown-corn stillage oil to reduce the acid value of the blown-corn stillage oil.

2. The method of claim 1 , wherein the stripped blown-corn stillage oil from step (d) exhibits a viscosity at 40° C. of at least 60 cSt and a viscosity at 100° C. of at least 11 cSt.

3. The method of claim 1 , wherein the stripped blown-corn stillage oil from step (d) exhibits a hydroxyl number of from about 10 to about 50.

4. The method of claim 1 , wherein the stripped blown-corn stillage oil from step (d) exhibits a flash point of at least 275° C.

5. The method of claim 1 , wherein the stripped blown-corn stillage oil from step (d) exhibits an acid value of 5 mg KOH/gram or less.

6. The method of claim 1 , wherein the stripped blown-corn stillage oil from step (d) exhibits an acid value of 4 mg KOH/gram or less.

7. The method of claim 1 , wherein the stripped blown-corn stillage oil from step (d) exhibits an acid value of 3.5 mg KOH/gram or less.

8. The method of claim 1 , wherein the stripped blown-corn stillage oil from step (d) exhibits an acid value of 3 mg KOH/gram or less.

9. The method of claim 1 , wherein the stripped blown-corn stillage oil from step (d) exhibits an acid value of 2.8 mg KOH/gram or less.

10. The method of claim 1 , wherein the pressure-distilled corn stillage oil comprises from 8 percent by weight to 16 percent by weight free fatty acids.

11. A method for producing a high viscosity, low volatiles blown-corn stillage oil, the method comprising the steps of:
(a) obtaining a vacuum-distilled corn stillage oil;
(b) heating the oil to at least 90° C.;
(c) passing air through the heated oil to produce a blown-corn stillage oil; and
(d) stripping the blown-corn stillage oil to reduce the acid value of the blown-corn stillage oil.

12. The method of claim 11 , wherein the stripped blown-corn stillage oil from step (d) exhibits a viscosity at 40° C. of at least 60 cSt and a viscosity at 100° C. of at least 11 cSt.

13. The method of claim 11 , wherein the stripped blown-corn stillage oil from step (d) exhibits a hydroxyl number of from about 10 to about 50.

14. The method of claim 11 , wherein the stripped blown-corn stillage oil from step (d) exhibits a flash point of at least 275° C.

15. The method of claim 11 , wherein the stripped blown-corn stillage oil from step (d) exhibits an acid value of 5 mg KOH/gram or less.

16. The method of claim 11 , wherein the vacuum-distilled corn stillage oil comprises from 8 percent by weight to 16 percent by weight flee fatty acids.

17. A method for producing a high viscosity, low volatiles blown-corn stillage oil, the method comprising the steps of:
(a) obtaining a corn stillage oil;
(b) heating the oil to at least 90° C.;
(c) passing air through the heated oil to produce a blown-corn stillage oil having a viscosity of at least 50 cSt at 40° C.; and
(d) stripping the blown-corn stillage oil to reduce the acid value of the blown-corn stillage oil.

18. The method of claim 17 , wherein the blown-stillage oil from step (c) exhibits a viscosity at 40° C. of at least 55 cSt and a viscosity at 100° C. of at least 11 cSt.

19. The method of claim 17 , wherein the stripped blown-corn stillage oil from step (d) exhibits a hydroxyl number of from about 10 to about 50.

20. The method of claim 17 , wherein the stripped blown-corn stillage oil from step (d) exhibits a flash point of at least 275° C.

21. The method of claim 17 , wherein the corn stillage oil is vacuum-distilled corn stillage oil.

22. The method of claim 17 , wherein the corn stillage oil is pressure-distilled corn stillage oil.

Assignees

• Cargill Inc

Inventors

• Hora Michael John
• Lochel Frank P

Classifications

• C11B3/14 Primary

  with the use of indifferent gases or vapours, e.g. steam · CPC title

• C11B3/02

  by chemical reaction {(C11B3/003 takes precedence)} · CPC title

• C11B3/08 Primary

  with oxidising agents · CPC title

• C07C29/76

  by physical treatment · CPC title

• C11C3/006

  by oxidation · CPC title