EP2086340A1

EP2086340A1 - Coffee-roasting process and drink base

Info

Publication number: EP2086340A1
Application number: EP06792044A
Authority: EP
Inventors: Alexander Sager
Original assignee: Individual
Current assignee: Tcb Beteiligunsgesellschaft Mbh
Priority date: 2006-09-13
Filing date: 2006-09-13
Publication date: 2009-08-12
Also published as: WO2008031444A1; DE212006000054U1

Abstract

In respect of a first aspect, the present invention proposes to separate roasted coffee beans from the husks and to comminute the latter. In respect of the second aspect, the present invention proposes to separate the husks from the roasted coffee beans and provide the same in the form of a drink base. In respect of a third aspect, the present invention proposes, for the purpose of producing a drink from husks separated off from roasted coffee beans, to produce an aqueous extract from these husks. In respect of a fourth aspect, the present invention proposes a drink made of an aqueous extract of husks separated off from roasted coffee beans.

Description

Coffee roasting process and beverage basis

The present invention relates to a Kaffeeröst- method, a drink, a beverage base and a method for producing the same.

In the international patent application WO 00/28831 a coffee roasting process is described in which the coffee beans are roasted under controlled conditions and in which impurities are separated in a separator and then disposed of as waste.

This known method is perceived as unsatisfactory in terms of raw material utilization.

The present invention therefore sets itself the goal of improving the known roasting process in terms of efficiency, product quality and / or variety.

In a first aspect, the present invention proposes to separate roasted coffee beans from the silver skins and to comminute the latter.

In a second aspect, the present invention proposes to separate the silver skins from the roasted coffee beans and provide them as a beverage base.

In a third aspect, the present invention proposes to prepare a beverage from silver skins separated from roasted coffee beans from these one aqueous extract.

In a fourth aspect, the present invention proposes a beverage made from an aqueous extract of silver skins separated from roasted coffee beans. The invention therefore provides an improvement in the utilization of raw materials by providing the silver pellets conventionally obtained as waste with a beneficial use.

It is preferred to ensure a high product quality, coffee beans of the variety "Arabica" (alternatively or additionally those of the variety "Robusta" or "Arabusta") after a wet-treatment process at temperatures between 150 ⁰ C and 200 ⁰ C in a drum roasting process gently To roast, so that no significant amounts of unwanted impurities such as acrylamide arise. The wet-dressing process has the advantage of providing better separation of the pulp and the parchment skin.

It is further preferable to crush the separated silver skins enough so that their bulk density is in a range of 0.05 g / cm ³ to 0.25 g / cm ³ , or their particle size distribution has a maximum in the range of 2 mm to 12.5 mm. At this size, the flavor yield is optimal, while with further size reduction the aroma losses outweigh the improved release. Furthermore, the silver skins are optimally suitable for transport, packaging and dosing in the production of an infusion at the stated bulk density (see the following paragraph).

For the preparation of a beverage, it is preferred to produce the aqueous infusion of the separated and optionally crushed silver skin with heated water having a temperature of 80 ⁰ C to 96 ° C, wherein the dosage is in a range of 1 to 3 percent by weight silver skins based on water ,

Further advantageous embodiments and details emerge from the dependent claims, the following description and the attached drawings. The claims are a non-limiting attempt to describe the invention in general terms. It shows FIG. 1 shows a flow chart of a coffee roasting process according to the invention,

FIG. 2 shows a flowchart of a method according to the invention for producing a beverage, and

3 shows schematically a roasting device.

In the process illustrated in FIG. 1, the harvested coffee cherries are first freed from the adhering pulp in a wet treatment process, fermented, cleaned and dried. The raw coffee obtained is roasted at bean temperatures between 150 ⁰ C and 200 ⁰ C. The flaking off silver skins are entrained by the roasting gas stream and separated in a separator. The separated silver skins are packaged directly as a beverage base or first fed to a chopper, where they are comminuted so that their particle size distribution has a maximum number in the range of 2 mm to 5 mm. The bulk density of the silver skins is from 0.10 to 0.15 g / cm ³ .

The particle size distribution is determined by dividing the particles into size classes and then counting them. For example, the size classes are chosen so that five size classes cover a range of two orders of magnitude; namely, the size classes are 0.3 mm to 0.8 mm; 0.8 mm to 2 mm, - 2 mm to 5 mm; 5 mm to 12.5 mm and 12.5 mm to 30 mm. The size dimension used is the largest diameter.

The roaster gas temperature is in the range 150 ⁰ C to 250 ⁰ C. At these lower roasting gas is heated air -temperatures used. Alternatively, in a short-time roasting process higher roasting gas temperatures of 400 ⁰ C to 600 ⁰ C with a lower oxygen content of the roasting gas and a shorter roasting time of 1 to 2 minutes or in a centrifugal roasting temperatures of 240 ⁰ C to 300 ⁰ C for 3 to 5 minutes used. The roasting gas used here is nitrogen or carbon dioxide or a mixture thereof. Furthermore, the roasting gas may contain small amounts of water vapor, oxygen and argon and optionally further inert gases. Generally, the roasting time is 1 to 20, preferably 3 to 15 minutes, more preferably 5 to 10 minutes or 10 to 20 minutes. A batch roasting process or a continuous roasting process may be used.

As shown in Figure 2, for the preparation of a beverage from the beverage base of 20g of the base per liter liter of heated water of 90 ⁰ C for 5 min. Brewing time made a aqueous extract. To make a cold drink, the extract is then cooled. The extracted silver skins are composted. In particular, in the production of a cold drink, the addition of further beverage components, such as a sugar solution and / or other flavorings may be provided.

The roasting apparatus 1 shown schematically in FIG. 3 has a drum roasting machine 3 for batch roasting (entry of the roast material at A). Alternatively, a drum with perforated drum wall and internal transport screw for continuous roasting is provided. The roasting gas is heated by a gas burner 5. After roasting, the roasted beans are conveyed onto a cooling sieve 7. The roasting with the separated silver pellets enters an uncooled cyclone 9, the exhaust air from the cooling screen 7 in a Kühlabluftzyklone 11. The cyclone 9 is uncooled, preferably thermally insulated or heated to a premature

Extraction of the silver skins by condensing water vapor

(for example from roasting processes). Alternatively, one is

Exhaust air pre-cooling between roasting drum 3 and cyclone 9 is provided. The exhaust air is completely or partially supplied to the burner 5. In the illustrated alternative, the exhaust air or the remaining part of the exhaust air is supplied to a flue gas combustion and / or subjected to other exhaust gas purification processes. The ready roasted coffee beans are fed from the chill sieve 7 to a coffee bean packing device 17. The separated silver pellets are then fed to a crusher 13, and from there a packaging station 15. There, the silver skins are either filled into direct use by a consumer certain sachets, which are expediently even water resistant, but allow the contents contact with surrounding water. The silver skins can also be packaged eg in 100g, 250g, 500g or kilogram in storage containers such as bags or cans. In one variant of the invention, filled and sealed sachets are packed in folding cartons of, for example, 50 or 100 pieces each.

In a further alternative, the cuticle cyclone is designed such that, in addition to the separation of the silver skins, it also brings about its comminution, namely to an adjustable particle size or bulk density.

In summary, the invention provides in its various aspects a coffee roasting process, a process for making a beverage base, and a beverage that enhance the utilization of the coffee raw material: the silver skins are separated from the roasted coffee beans and, if necessary, a separate or integrated particle size reduction and Homogenization, provided as a beverage basis. To prepare a beverage from this, an aqueous infusion is produced.

Moreover, the invention also makes it possible to dispense with peeling the parchment coffee in whole or in part, and in this way to reduce manufacturing costs and at the same time to increase the revenue per unit weight of harvested coffee by a larger amount of the beverage or the beverage base can be obtained , The commercial importance of the invention will also be apparent from the fact that green coffee represents the world's most important commodity after crude oil; Even low mass fractions, such as the silver skins in relation to the green coffee, add up to a considerable total sales.

Claims

claims

A coffee roasting process comprising:

Providing recycled coffee beans;

Roasting the coffee beans while separating the silver skins from the coffee beans; and

Crushing the severed silver skins.

The coffee roasting method of claim 1, further comprising packaging the separated silver skins separately from the roasted coffee beans.

3. Coffee roasting method according to claim 2, wherein the packaging of the silver pellets takes place in storage vessels.

4. Coffee roasting method according to claim 2, wherein the packaging is carried out in water-resistant sachets.

A coffee roasting method according to any one of claims 1 to 4, wherein providing the processed coffee beans comprises providing coffee cherries and processing the coffee cherries to remove the pulp.

6. A method of making a base for an infusion beverage comprising:

Providing recycled coffee beans;

Roasting the coffee beans; And thereby

Separating the silver skins from the roasting coffee beans, so that the separated silver skins provide the basis for the infusion drink.

The method of claim 6, wherein providing the processed coffee beans comprises providing coffee cherries and processing the coffee cherries to remove the pulp.

8. The method of claim 6 or 7, wherein the separated silver pellets are crushed.

9. The method according to any one of the preceding claims, wherein the bulk density of the separated or crushed

Silver skinned in a range of 0.05 g / cm ³ to 0.25 g / cm ³ , preferably in a range of 0.10 g / cm ³ to 0.15 g / cm ³ .

10. The method according to any one of the preceding claims, wherein the particle size distribution of the separated silver skins has a maximum number of particles of 5 mm to 12.5 mm largest diameter.

11. The method according to any one of claims 1 to 10, wherein the particle size distribution of the separated silver skins has a maximum number of particles of 2 mm to 5 mm largest diameter.

12. The method according to any one of the preceding claims, wherein the provided coffee beans were prepared by a wet processing method.

13. A method according to any one of claims 1 to 11, wherein the provided coffee beans have been prepared by a dry-processing method.

14. A method according to any one of the preceding claims, wherein the roasting is carried out by a drum roasting process in batch mode.

15. The method according to any one of claims 1 to 13, wherein the roasting is carried out according to a Trommelröstverfahren in continuous operation.

16. The method according to any one of the preceding claims, wherein the roasting at temperatures of 100 ⁰ C to 600 ⁰ C, preferably from 150 ⁰ C to 200 ⁰ C is performed.

5

17. The method according to any one of the preceding claims, wherein coffee beans are used from coffee cherries of the Arabica variety.

18. The method of claim 17, wherein predominantly coffee beans from coffee cherries of the Arabica variety are used.

19. The method according to any one of claims 1 to 16, wherein coffee beans from coffee cherries of the variety Robusta used

15 will be.

20. The method of claim 19, wherein predominantly coffee beans from coffee cherries of the variety Robusta be used.

21. The method according to any one of claims 1 to 16, wherein coffee beans are used from coffee cherries of a variety of cross.

22. The method of claim 21, wherein predominantly coffee .5 cherries of a variety of crosses are used.

23. The method of claim 21 or 22, wherein the cross species is Arabusta.

30 24. A process for preparing an infusion beverage comprising the method of claim 6 or according to any of claim 6 dependent claims, and the Manufacture of an infusion with the basis using heated water, the temperature between 40 ⁰ C and 14O ⁰ C,

J5 preferably between 50 ⁰ C and 100 ⁰ C, without exceeding the temperature of 140 °.

25. The method of claim 24, wherein the temperature of the water during infusion between 80 ⁰ C and 96 ⁰ C.

A process according to claim 24 or 25, wherein the aqueous infusion is prepared using from 0.5 g to 5 g, preferably from 1 to 3 g of the base per 100 g of water.

27. A method for producing a cold drink comprising the method according to claim 6 or any one of the claims dependent on claim 6, and the preparation of an aqueous extract from the base.

28. The method of claim 27, wherein the aqueous extract is prepared using heated water, wherein the temperature of the water between 4O ⁰ C and 140 ⁰ C, preferably between 50 ⁰ C and 100 ⁰ C, preferably between 80 ⁰ C and 96 ⁰ C, further comprising cooling the extract.

A process according to claim 27 or 28, wherein the aqueous extract is prepared using from 0.5 g to 5 g, preferably from 1 to 3 g, of the beverage base per 100 g of water.

30. A beverage containing an aqueous extract obtainable by the process according to any of claims 24 to 26 from silver skins separated from roasting coffee beans.

31. A beverage according to claim 30, mainly consisting of the aqueous extract.

32. A beverage according to claim 31, consisting essentially of the aqueous extract.

33. A cold drink containing an aqueous extract obtainable by the process according to any one of claims 27 to 29 from silver skins separated from roasting coffee beans.

34. Cold drink according to claim 33, mainly consisting of the aqueous extract.

5. Cold drink according to claim 34, consisting essentially of the aqueous extract.