Oil processing

Patent metadata

Field	Value
Publication number	US-11149229-B2
Application number	US-201916969643-A
Country	US
Kind code	B2
Filing date	Feb 21, 2019
Priority date	Feb 21, 2018
Publication date	Oct 19, 2021
Grant date	Oct 19, 2021

Abstract

A process for the production of a refined oil having a reduced content of glycidyl esters and hydroperoxides characterized in that it comprises subjecting an edible oil to the following steps, a bleaching step, a deodorization step, re-bleaching step on the deodorized oil, and a further refining step, wherein the further refining step is carried out by passing the bleached edible oil obtained in step c) through an oil refining equipment consisting of a stripping column with packing and not more than one oil collection tray.

First claim

The invention claimed is:

1. A process for the production of a refined oil having a reduced content of glycidyl ester and hydroperoxides characterized in that it comprises subjecting an edible oil to the following steps:
a) a bleaching step,
b) a deodorization step,
c) a re-bleaching step of the deodorized oil, and
d) a further refining step, wherein the further refining step d) is carried out by passing the bleached edible oil obtained in step c) under vacuum through an oil refining equipment consisting of a stripping column with packing and not more than one oil collection tray and carried out a temperature below 215° C.;
wherein the stripping column has a packing and an oil loading of from 0.5 to 4.0 kg/m 2 h surface of packing; and
wherein the refined oil has a reduced content of glycidyl ester and hydroperoxides.

2. The process according to claim 1 wherein the stripping column has a height to diameter ratio from 0.1 to 10.

3. The process according to claim 1 wherein the bleaching step a) and/or c) is performed in presence of an activated bleaching agent.

4. The process according to claim 1 wherein the process further comprises a treatment in presence of a base.

5. The process according to claim 4 wherein the treatment in presence of a base is prior to the further refining step d).

6. The process according to claim 4 wherein the treatment in presence of a base is prior to the re-bleaching step c).

7. A method for using a refining equipment consisting of a stripping column with packing and not more than one oil collection tray, the method comprising:
passing a refined bleached, deodorized, and re-bleached edible oil under vacuum through the refining equipment carried out a temperature below 215° C.;
wherein the stripping column has an oil loading of from 0.5 to 4.0 kg/m 2 h surface of packing; and
wherein the method reduces the content of hydroperoxides and/or volatiles from the refined bleached, deodorized, and re-bleached edible oil.

8. The method according to claim 6 , wherein the stripping column has a height to diameter ratio from 0.1 to 10.

9. The process of claim 5 , wherein the bleached edible oil obtained in step c) has a total residence time in the stripping column of not more than 20 minutes.

10. The process of claim 5 , wherein steam is used as a stripping agent.

11. The process of claim 5 , wherein the stripping column is operated at an absolute pressure from 0.1 to 8 mbar.

12. The process of claim 5 , wherein the obtained refined edible oil has a flavour quality score of at least 8.

13. The process of claim 5 , wherein the packing is a structured packing.

14. The method of claim 7 , wherein the refined bleached, deodorized, and re-bleached edible oil has a total residence time in the stripping column of not more than 20 minutes.

15. The method of claim 7 , wherein steam is used as a stripping agent.

16. The method of claim 7 , wherein the stripping column is operated at an absolute pressure from 0.1 to 8 mbar.

17. The method of claim 7 , wherein after passing the refined bleached, deodorized, and re-bleached edible oil through the refining equipment, the refined bleached, deodorized, and re-bleached edible oil has a flavour quality score of at least 8.

18. The method of claim 7 , wherein the packing is a structured packing.

Assignees

• Cargill Inc

Inventors

• Maiworm Michael
• Tarnow Armin Willem-Friedrich Hermann

Classifications

• B01D3/28

  Fractionating columns with surface contact and vertical guides, e.g. film action · CPC title

• C11B3/14

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

• C11B3/10

  by adsorption · CPC title

• C11B3/001 Primary

  by a combination of two or more of the means hereafter · CPC title

• C11B3/06

  with bases · CPC title