Process for extraction of aroma chemicals from fat-containing and/or aqueous liquid phases

Patent metadata

Field	Value
Publication number	US-10144904-B2
Application number	US-201615362849-A
Country	US
Kind code	B2
Filing date	Nov 29, 2016
Priority date	Dec 4, 2015
Publication date	Dec 4, 2018
Grant date	Dec 4, 2018

Abstract

The present invention relates to a process for continuous extraction of an aqueous and/or fat-containing liquid phase F comprising aroma chemicals with a gas G in the liquid or supercritical state.

First claim

The invention claimed is:

1. A process for continuous extraction of an aroma chemical, comprising:
(a) mixing a continuous stream S F1 of an aqueous and/or fat-containing liquid phase F 1 with a continuous stream S G1 of a gas G 1 in cocurrent to obtain a continuous stream S 1 of a mixture of the streams S F1 and S G1 , wherein the liquid phase F 1 comprises an aroma chemical and the gas G 1 is in a liquid or supercritical state;
(b) continuously passing the stream S 1 through a tube R having an internal surface O I and an external surface O A , such that
the stream S 1 contacts the internal surface O I and that the aroma chemical in the stream S F1 is at least partly extracted into the stream S G1 while passing through the tube R, thereby obtaining
a continuous stream S 2 exited the tube R, wherein the stream S 2 is a mixture of a continuous stream S F2 comprising a liquid phase F 2 containing a smaller amount of the aroma chemical compared to the stream S F1 and a continuous stream S G2 comprising liquid and/or supercritical gas G 2 enriched in the aroma chemical compared to the stream S G1 ; and
(c) at least partly contacting at least a portion of the stream S 2 with the external surface O A of the tube R such that a heat exchange takes place between the streams S 2 and S 1 ,
wherein the stream S 1 when exiting the tube R is at least partly oriented against the gravitational force.

2. The process of claim 1 , further comprising:
(d) continuously separating the stream S G2 from the stream S F2 .

3. The process of claim 2 , wherein the separating in (d) is performed such that the stream S G2 is directed upwards and that the stream S F2 is directed downwards due to the gravitational force.

4. The process of claim 1 , wherein the liquid phase F 1 is a fat or oil of vegetable or animal origin comprising the aroma chemical.

5. The process of claim 4 , wherein the liquid phase F 1 comprises at least one selected from the group consisting of peanut oil, hazelnut oil, and coconut oil.

6. The process of claim 1 , wherein the liquid phase F 1 is an aqueous solution having a fruit aroma.

7. The process of claim 6 , wherein the fruit aroma is apple aroma.

8. The process of claim 1 , wherein the gas G 1 is selected from the group consisting of carbon dioxide, ethane, propane, propene, butane, N 2 O and mixtures thereof.

9. The process of claim 8 , wherein the gas G 1 is supercritical carbon dioxide.

10. The process of claim 1 , wherein a part of the stream S 1 exiting the tube R is first oriented against the gravitational force and then flows following the gravitational force.

11. The process of claim 1 , wherein the tube R leads into the interior of an autoclave A, and, in (b), the stream S 1 is passed through the tube R into the interior of the autoclave A.

12. The process of claim 11 , wherein the stream S 2 is backed up in the autoclave A such that the backed-up stream S 2 at least partially covers the external surface O A of the tube R located interior of the autoclave A.

13. The process of claim 1 , wherein the liquid phase F 1 is a fat or oil of vegetable origin comprising the aroma chemical.

14. The process of claim 1 , wherein, in (b), the stream S 1 is oriented against the gravitational force.

15. The process of claim 1 , wherein, in (b), a mass ratio of the stream S F1 to the stream S G1 is from 1:1 to 1:50.

16. The process of claim 1 , wherein the tube R is at least partly composed of stainless steel.

17. The process of claim 1 , wherein, in (c), the portion of the stream S 2 contacted with the external surface O A of the tube R flows along the external surface O A .

Assignees

• Wiesmueller Johann
• Michlbauer Franz
• Oberbauer Guenther
• Hausner Helmut
• Kaiser Harald
• Evonik Degussa Gmbh

Inventors

• Wiesmueller Johann
• Michlbauer Franz
• Oberbauer Guenther
• Hausner Helmut
• Kaiser Harald

Classifications

• B01D2011/005

  Co-current extraction · CPC title

• A23L27/12

  from fruit, e.g. essential oils · CPC title

• A23L27/11

  obtained by solvent extraction · CPC title

• C11B9/025 Primary

  Recovery by solvent extraction · CPC title

• A23V2002/00

  Food compositions, function of food ingredients or processes for food or foodstuffs · CPC title