Blown and stripped biorenewable oils

Patent metadata

Field	Value
Publication number	US-9765280-B2
Application number	US-201515120942-A
Country	US
Kind code	B2
Filing date	Mar 13, 2015
Priority date	Mar 14, 2014
Publication date	Sep 19, 2017
Grant date	Sep 19, 2017

Abstract

A method for producing a blown and stripped biorenewable oil is provided. The method may include the steps of (a) heating a biorenewable oil to at least 90° C.; (b) exposing an oxygen containing stream to the heated oil to produce a blown oil having a viscosity of at least 40 cSt at 40° C.; (c) adding a base metal catalyst to the blown oil; and (d) stripping the blown oil from step (c) until the stripped oil has an acid value of from about 1 mg KOH/g to about 20 mg KOH/g; wherein the stripped oil from step (d) has a flash point of at least 220° C.

First claim

We claim:

1. A method for producing a blown and stripped biorenewable oil, the method comprising the steps of:
(a) heating a composition comprising biorenewable oil and a first catalyst to at least 90° C.;
(b) exposing an oxygen containing stream to the heated composition from step (a) to produce a blown oil having a viscosity of at least 40 cSt at 40° C.;
and
(c) stripping the blown oil, in the presence of a second catalyst, to produce a stripped oil having an acid value of from about 1 mg KOH/g to about 20 mg KOH/g; wherein the first catalyst and the second catalyst are different.

2. The method of claim 1 , wherein the composition in step (a) is heated to about 115° C.

3. The method of claim 1 , wherein the oxygen containing stream is an oxygen enriched stream derived from air.

4. The method of claim 1 , wherein the oxygen containing stream comprises hydrogen peroxide.

5. The method of claim 1 , wherein the stripping step includes bodying reactions.

6. The method of claim 1 , wherein the first catalyst is a base metal catalyst comprising a transition metal.

7. The method of claim 1 , wherein step (a) includes adding the first catalyst in an amount ranging from about 200 ppm to about 1000 ppm.

8. The method of claim 1 , wherein the composition in step (a) further comprises a peroxide initiator.

9. The method of claim 1 , wherein the composition in step (a) further comprises tung oil.

10. The method of claim 1 , wherein the second catalyst comprises potassium hydroxide.

11. The method of claim 1 , wherein the second catalyst is a base metal catalyst.

12. The method of claim 11 , wherein the base metal catalyst comprises metal selected from the group consisting of potassium, calcium, sodium, magnesium, and combinations thereof.

13. The method of claim 1 , wherein the second catalyst is present in an amount ranging from about 250 ppm to about 1200 ppm.

14. The method of claim 1 , further including the step of adding a polyol to the stripped oil before, during, or after step (c).

15. The method of claim 14 , wherein the polyol comprises glycerol.

16. The method of claim 1 , wherein the viscosity of the stripped oil produced in step (c) ranges from about 45 cSt to about 70 cSt at 40° C.

17. The method of claim 1 , wherein the stripped oil produced in step (c) comprises:
(a) from about 2% to about 10% by weight free fatty acids;
(b) from about 12% to about 22% by weight diacylgycerides;
(c) from about 50% to about 70% by weight triglycerides; and
(d) from about 5% to about 20% by weight dimers and trimers content, collectively.

18. The method of claim 1 , wherein the stripped oil produced in step (c) has a flash point of at least 220° C.

19. The method of claim 1 , wherein the stripped oil produced in step (c) has a hydroxyl value of 10 to 70.

20. The method of claim 1 , wherein the stripped oil produced in step (c) has an acid value of from about 1 mg KOH/g to about 20 mg KOH/g.

Assignees

• Cargill Inc

Inventors

• Kurth Todd L
• Lochel Frank P
• Stauduhar Suzanne
• Tabatabaee Hassan Ali

Classifications

• C11C3/006

  by oxidation · CPC title

• C11B3/08 Primary

  with oxidising agents · CPC title

• C08L2555/64

  Oils, fats or waxes based upon fatty acid esters, e.g. fish oil, olive oil, lard, cocoa butter, bees wax or carnauba wax · CPC title

• C08L95/00

  Compositions of bituminous materials, e.g. asphalt, tar, pitch · CPC title

• Y02P30/20

  using bio-feedstock · CPC title