Coffee oil capsules
The present invention relates to a process for producing capsules comprising a composition comprising coffee oil. The invention also relates to capsules obtainable by such process. In addition the invention relates to compositions, food ingredients and food products comprising such capsules.
1. A process for producing a capsule comprising coffee oil, the process comprising:
a) providing one or more aqueous compositions comprising coffee extract and a composition comprising coffee oil;
b) mixing a first aqueous composition comprising coffee extract with the composition comprising coffee oil at a pH below 7 to provide an oil-in-water emulsion;
c) raising the pH to a value in the range of 7 to 8; and
d) providing the capsule comprising coffee oil.
2. The process according to claim 1 , wherein the pH in step b) is in the range 4.0-6.5.
3. The process according to claim 1 , wherein the pH during step c) is raised to the value in the range of pH 7 to 8 by addition of a second aqueous composition comprising coffee extract.
4. The process according to claim 1 , wherein the first aqueous composition comprising coffee extract provided in step b) has a dry matter content by weight (w/w) of coffee extract in the range 0.1-50%.
5. The process according to claim 1 , wherein the composition comprising coffee oil comprises at least 5% coffee oil by weight (w/w).
6. The process according to claim 1 , wherein the coffee oil is a fraction of whole coffee oil.
7. The process according to claim 1 , wherein 50-100% (w/w) of dry matter content of the capsule is derived from coffee beans.
8. A capsule comprising coffee oil, the capsule obtained by the process according to claim 1 .
9. A capsule comprising coffee oil comprising
a core of a composition comprising coffee oil; and
a membrane surrounding the core, wherein the membrane comprises coffee oil constituents and aqueous coffee extract constituents.
10. The capsule comprising coffee oil according to claim 9 , having a diameter in the range 1 μm to 1 mm.
11. A composition comprising a capsule comprising coffee oil comprising:
a core of a composition comprising coffee oil; and
a membrane surrounding the core, wherein the membrane comprises coffee oil constituents and aqueous coffee extract constituents.
12. A food ingredient comprising a capsule comprising coffee oil comprising:
a core of a composition comprising coffee oil; and
a membrane surrounding the core, wherein the membrane comprises coffee oil constituents and aqueous coffee extract constituents.
13. The composition according to claim 11 , wherein the composition is selected from the group consisting of a cosmetic, a skin lotion, a pharmaceutical composition, a nutritional food composition, a nutraceutical, and a medicament.
14. A process for producing a capsule comprising coffee oil, the process comprising:
a) providing one or more aqueous compositions comprising coffee extract and a composition comprising coffee oil;
b) emulsifying the composition comprising coffee oil with an aqueous phase to provide a first oil-in-water emulsion;
c) mixing a first aqueous composition comprising coffee extract with the first oil-in-water emulsion at a pH below 7 to provide a second oil-in-water emulsion;
d) raising the pH to a value in the range of 7 to 8;
e) concentrating the second oil-in-water emulsion;
f) mixing the second oil-in-water emulsion with coffee extract;
g) drying the second oil-in-water emulsion; and
h) providing the capsule comprising coffee oil.
15. The process according to claim 3 , wherein the second aqueous composition consists of water and components derived entirely of coffee constituents.
16. The process according to 1 , wherein the one or more aqueous compositions comprising coffee extract are free of citrate and acetic compounds.
17. The process according to 14 , wherein the one or more aqueous compositions comprising coffee extract are free of citrate and acetic compounds.
18. The process according to 1 , wherein the capsule consists of water and components derived entirely from coffee.
19. The process according to 14 , wherein the entirety of the capsule comprising coffee oil is derived from coffee.
20. The process according to claim 3 , wherein the pH during step c) is raised to the value in the range of 7 to 8 by the coffee extract in the second aqueous composition.