Blown and stripped blend of soybean oil and corn stillage oil

• US 10,144,902 B2
• Filed: 02/06/2015
• Issued: 12/04/2018
• Est. Priority Date: 05/21/2010
• Status: Active Grant

• Current Assignee: Cargill, Inc. (Agricultural Services Division)
• Original Assignee: Cargill, Inc. (Agricultural Services Division)
• Inventors: Hora, Michael John, Murphy, Patrick Thomas, Tolfa, John Carl
• Primary Examiner(s): WEISS, PAMELA HL
• Application Number:
  US14/615,651
• Publication Number:
  US 20150152350A1
• Time in Patent Office: 1,397 Days
• CPC Class Codes: C11B 3/001 by a combination of two or more of the means hereafter
• CPC Class Codes: C11B 3/14 with the use of indifferent gases or vapours, e.g. steam

Abstract

A method for producing a high viscosity, low volatiles blown stripped oil blend is provided. The method may include the steps of: (i) obtaining an oil blend of corn stillage oil and soybean oil having a weight ratio of corn stillage oil to soybean oil of from about 1:2 to 3:1; (ii) heating the oil blend to at least 90° C.; (iii) passing air through the heated oil blend to produce a blown oil having a viscosity of at least 50 cSt at 40° C.; and (iv) stripping the blown oil from step (iii) to reduce an acid value of the blown oil to less than 5.0 mg KOH/gram.

Claims

1. A method for producing a high viscosity, low volatiles blown stripped oil blend, the method comprising the steps of:

(a) obtaining an oil blend;

(b) heating the oil blend to at least 90°

C.;

(c) passing air through the heated oil blend to produce a blown oil having a viscosity of at least 50 cSt at 40°

C.; and

(d) stripping the blown oil from step (c) to reduce an acid value of the blown oil to less than 5.0 mg KOH/gram;

wherein the oil resulting from step (d) has a hydroxyl number less than 40 mg KOH/gram.

2. The method of claim 1, wherein the oil resulting from step (d) exhibits a viscosity at 40°

C. of from about 50 cSt to about 200 cSt at 40°

C.

3. The method of claim 1 wherein the oil resulting from step (d) exhibits a viscosity at 40°

C. of at least 500 cSt at 40°

C.

4. The method of claim 1, wherein the oil resulting from step (d) exhibits:

a viscosity at 40°

C. of at least 5000 cSt at 40°

C. and a flash point of at least 290°

C.

5. The method of claim 1, wherein the oil resulting from step (d) exhibits an acid value of 3.5 mg KOH/gram or less.

6. The method of claim 1, wherein the oil resulting from step (d) exhibits a flash point of at least 295°

C.

7. The method of claim 1, wherein the oil resulting from step (d) exhibits:

a viscosity at 40°

C. of at least 700 cSt;

a viscosity at 100°

C. of at least 63 cSt;

an acid value of 3.5 mg KOH/gram or less; and

a flash point of at least 310°

C.

8. The method of claim 1, wherein an initial acid value of the oil blend of step (a) is from about 12 mg KOH/gram to about 18 mg KOH/gram.

9. The method of claim 1, wherein the oil resulting from step (d) exhibits:

a viscosity at 40°

C. of at least 730 cSt;

a viscosity at 100°

C. of at least 68 cSt;

an acid value of 3.0 mg KOH/gram or less; and

a flash point of at least 315°

.

10. The method of claim 1, wherein the oil resulting from step (d) exhibits a flash point of at least 320°

C.

11. The method of claim 1, wherein the oil resulting from step (d) exhibits an acid value of 2.8 mg KOH/gram or less.

12. The method of claim 1, wherein an initial acid value of the oil blend of step (a) is from about 16 mg KOH/gram to about 18 mg KOH/gram.

13. The method of claim 1, wherein a catalyst comprising a metal selected from the groups consisting of Transition Elements and Group IV is added to the oil prior to or during step (c).

14. The method of claim 1, wherein a catalyst is added prior to the oil prior to or during step (c), the catalyst comprising a metal selected from the group consisting of:

tin, cobalt, iron, zirconium, titanium, and combinations thereof.

23. The method of claim 1, wherein the blown, stripped oil blend has a viscosity of at least 5000 cSt at 40°

C.

24. The method of claim 1, wherein the hydroxyl number is less than 30 mg KOH/gram.

25. The method of claim 1, wherein the oil blend comprises soybean oil.

15. A method for producing a high viscosity, low volatiles blown, stripped oil blend, the method comprising the steps of:

(a) obtaining an oil blend, the oil blend having an initial acid value of from 8 mg KOH/gram to 18 mg KOH/gram;

(b) heating the oil blend to at least 90°

C.;

(c) passing air through the heated oil blend to produce a blown oil blend;

(d) stripping the blown oil blend to reduce the acid value of the blown oil blend to from 5 mg KOH/gram to 9 mg KOH/gram;

(e) adding a sufficient amount of glycerin to the stripped blown oil from (d) to obtain a molar ratio of hydroxyl groups from the added glycerin to the free fatty acids present in the oil from (d) of from 1;

5 to less than 1;

1; and

(f) stripping the oil from step (e) to a final acid value of about 3.5 mg KOH/gram or less.

16. The method of claim 15, wherein sufficient glycerin is added to obtain a molar ratio of hydroxyl groups from the added glycerin to the free fatty acids present in the oil from (d) of from about 1:

5 to about 8;

10.

17. The method of claim 16, wherein the initial acid value of the oil blend of (a) is from about 14 mg KOH/gram to about 17 mg KOH/gram.

18. The method of claim 15, wherein the oil resulting from step (f) has a flash point of at least 293°

C.

19. The method of claim 15, wherein, the oil resulting from step (f) has a flash point of at least 310°

C. and exhibits a viscosity of at least 680 cSt at 40°

C. and a viscosity of at least 63 cSt at 100°

C.

20. The method of claim 15, wherein the oil from step (f) has a flash point of at least 315°

C.

21. The method of any of claim 15, wherein the oil from step (f) has an acid value of 3.0 mg KOH/gram or less.

22. The method of any claim 15, wherein the oil from step (f) has a hydroxyl number less than 50 mg KOH/gram.

26. The method of claim 15, wherein the oil blend comprises soybean oil.