Method for preparing a coffee extract
View Patent ↗The invention relates to a method for preparing a coffee concentrate, wherein the coffee is subjected to two extractions, while the second extraction is carried out at a higher temperature than the first extraction. The method is suitable for preparing liquid as well as solid concentrates. The method produces a new concentrate that forms a further aspect of the present invention.
1. A method for preparing a coffee concentrate, wherein roasted, ground coffee is subjected to a primary extraction with water in a primary extraction cell, whereby a first primary extract is obtained with a draw-off factor of at most 2.5, after which a second primary extract is obtained from further extraction in the primary extraction cell; the first primary extract is then fed to a secondary extraction section in which, with water having a temperature between 120 and 210° C., a secondary extract is obtained; the second primary extract and the secondary extract are combined and are then subjected to evaporation for obtaining a concentrated extract; and wherein this concentrated extract is combined with the first primary extract, thereby obtaining a coffee concentrate.
2. A method according to claim 1 , wherein a first primary extract is obtained with a draw-off factor of at most 1.5.
3. A method according to claim 1 , wherein a first fraction of secondary extract is used as primary feedwater in the first extraction cell.
4. A method according to claim 1 , wherein the primary extraction is carried out with water at a feedwater temperature between 70 and 120° C.
5. A method according to claim 1 , wherein the coffee concentrate is subjected to a liquid-solid separation, thereby obtaining a liquid coffee concentrate or, after drying, an instant coffee.
6. A method according to claim 1 , wherein both the primary and the secondary extraction are carried out in a percolator.
7. A method according to claim 1 , wherein the primary and/or secondary extractions are carried out in percolators placed in series.
8. A method according to claim 1 , wherein a first primary extract is obtained with a draw-off factor of at most 1.0.