Process for Producing an Aroma-Laden Gas, Aroma-Laden Gas, and Use of the Aroma-Laden Gas

Abstract

A process for producing an aroma-laden gas (10) comprises the following steps: a) providing a liquid phase (5), which contains a solvent and one or several aromatic substances (1, 2, 3); b) guiding through a solid phase extraction column (3) of the liquid phase provided in step (a) by obtaining the solid phase (35) laden with one or several aromatic substances; separating one or several aromatic substances from the laden solid phase by means of at least one gas (2) in a liquid and/or supercritical state; and optionally d) collecting the gas (10), which is laden with one or several aromatic substances (1, 2, 3).

Claims

1.-20. (canceled)

21. A process for producing an aroma-laden gas (10), comprising the following steps: a) providing a liquid phase (5), which contains a solvent and one or several aromatic substances (1, 2, 3); b) guiding the liquid phase (5) provided in step (a) through a solid phase extraction column (3) filled with a solid phase (30) and thereby obtaining a solid phase (35) laden with one or several aromatic substances; and c) separating an aromatic substance or several aromatic substances (1, 2, 3) from the laden solid phase (35) by a gas (2) in a liquid and/or supercritical state, wherein the solid phase (30) filled in the solid phase extraction column (3) is or comprises a nonpolar sorbent, which is based on hydrophobically modified polymer materials and/or silica gels, and wherein a concentration and extraction of the aromatic substance or the several aromatic substances takes place in an ethanol-free manner.

22. The process according to claim 21, wherein after step (c), a step d) collecting an aroma-laden gas (10), which is laden with one or several aromatic substances, is performed.

23. The process according to claim 21, wherein step (c) is performed directly in the solid phase extraction column (3).

24. The process according to claim 21, wherein step (c) is performed in a device (4; 40), which is suitable for this purpose, and wherein the laden solid phase (35) obtained in step (b) is removed from the solid phase extraction column (3) and is transferred into this device (4; 40).

25. The process according to claim 21, wherein the solvent is selected from the group consisting of water, solvents that are miscible with water, and mixtures of water with one or several solvents that are miscible with water.

26. The process according to claim 21, wherein the solid phase (30) filled in the solid phase extraction column (3) is or comprises a nonpolar sorbent, which is based on crosslinked polystyrenes as hydrophobically modified polymer materials.

27. The process according to claim 21, wherein the solid phase is laden completely or partially with one or several aromatic substances (1, 2, 3) in step (b).

28. The process according to claim 21, wherein the gas (2) is carbon dioxide (CO.sub.2).

29. The process according to claim 21, wherein the gas (2) is carbon dioxide (CO.sub.2) in a supercritical state.

30. The process according to claim 21, wherein before or after step (d), a step (d1) separation of an aromatic substance or of several aromatic substances (1, 2, 3) from the gas from the aroma-laden gas (10) by extracting an aromatic substance (1, 2, 3) or a mixture of aromatic substances (123) takes place.

31. The process according to claim 30, wherein a guide-through of the aroma-laden gas (10) through a membrane filter (6) takes place in step (d1), and wherein a filtered-off and aromatic substance-free gas (20) is optionally recycled.

32. The process according to claim 30 with the further step of aromatizing a food, pharmaceutical, oral hygiene or cosmetic product (7), wherein an aromatic substance (1, 2, 3), which is separated from the aroma-laden gas, is brought into contact with the product (7), so that at least one aromatic substance passes at least partially into the product and/or a packaging of the product.

33. The process according to claim 32, wherein the product (7) is a beverage or an oral hygiene liquid product, and wherein the aroma-laden gas (10) is introduced into the liquid product (7).

34. The process according to claim 32, wherein the gas (20) from the aroma-laden gas (10) remains at least partially in the product (7).

35. The process according to claim 32, wherein the gas (20) escapes or is removed from the product (7) prior to the product (7) being used as intended.

36. The process according to claim 32, wherein at least two aroma-laden gases, which differ in number, relative shares, concentration and/or type of the aromatic substances, are brought into contact with the product.

37. An aroma-laden gas (10) or aroma-laden solid phase (35), produced according to the process according to claim 21 at a temperature of maximally 40° C., wherein compared to a liquid phase (5) containing a solvent and one or several aromatic substances (1, 2, 3), it has essentially the same composition of and preferably also the same relative shares of aromatic substances (1, 2, 3), wherein the liquid phase (5) is selected from the group consisting of beverages, fruit juices, coffees, milk and milk products, teas, beers, condensate, rinsing water, a secondary stream and/or side stream and/or waste stream from processing of animal or plant starting materials, or from the production of food, a bypass stream from the processing of fruits, or from the production of beverages, and mixtures thereof, and, compared to a liquid phase (5) based on at least one below-mentioned fruit or based on at least one below-mentioned starting material, respectively, the aroma-lade gas (10) or the aroma-laden solid phase (35) contains at least one of the below-mentioned respective aromas (1, 2, 3) in the same relative shares as the liquid phase: Strawberry: ethyl butyrate, methyl butyrate, ethyl methyl butyrate-2, methyl capronate, 4-hydroxy-2,5-dimethyl-3(2H)-furanone, methyl cinnamate, 3Z-hexenol, gamma-decalactone, Raspberry: alpha- and beta-ionone, 2E-hexenal, delta-decalactone, 3Z-hexenol, linalool, geraniol Apple: 2E-hexenol, 3Z-hexenol, 2E-hexenal, hexanal, ethyl butyrate, ethyl-2-methyl butyrate, beta-damascenone, Orange: ethyl butyrate, methyl butyrate, ethyl-2-methyl butyrate, octanal, hexanal, linalool, acetaldehyde, Grapefruit: nootkatone, ethyl butyrate, myrcene, linalool, p-menthenthiol-1,8, Lemon: citral, geraniol, beta-pinene, Cherry: benzaldehyde, 2E-hexenol, 2E-hexenal, hexanal, beta-damascenone, Peach: gamma-decalactone, delta-decalactone, 6-amyl-alpha-pyron, 2E-hexenol, beta-damascenone, linalool oxide, Banana: 3-methyl butyl butyrate, 3-methyl butyl acetate, hexanal, eugenol Pear: hexyl acetate, 3-methyl butyl acetate, 2E-hexenyl acetate ethyl-2E,4Z-decadienoate, Coffee: beta-damascenone, 4-hydroxy-2,5-dimethyl-3(2H)-furanone, furfurylthiol-2, 4-vinylguaiacol, 3-hydroxy-4,5-dimethylfuran-2(5H)-on, isomeric isopropyl methoxy pyrazines, isomeric ethyl dimethyl pyrazines, Tea: 3Z-Hexenol, indole, methyl jasmonat,3-methyl-2,4-nonandion, jasmine lactone, beta-damascenone, methyl salicylate, Onion: dipropyl disulfide, dipropyl trisulfide, methyl propyl disulfide, Meat: 2E,4Z,7Z-tridecatrienal, 2E,5Z-undecadienal, 2E,4Z-decadienal, Rice: 2-acetyl-1-pyrrolin, octanal, nonanal, Milk: 1-octen-3-on, diacetyl delta-decalactone, delta-dodecalactone, decanoic acid, Tomato: 3Z-hexenol, 4-hydroxy-2,5-dimethyl-3(2H)-furanone, beta-damascenone, dimethyl sulfide Mint: L-menthol, menthone, L-carvone, Beer: isoamyl acetate, 2-phenyl ethanol, ethyl butyrate, octanoic acid, Wine: wine lactone, 2-phenyl ethanol, linalool, linalool oxide. Passionfruit: ethyl hexanoate, linalool, gamma-decalactone, hexyl butyrate, hexyl hexanoate, 3Z-hexenyl butyrate, 3Z-hexenyl hexanoate Mango: dimethyl sulfide, alpha-pinene, ethyl butyrate, 4-hydroxy-2,5-dimethyl-3(2H)-furanone, gamma-octalactone, gamma-decalactone, 3Z-hexenol Pineapple: methy-2-methyl butyrate, ethyl-2-methyl butyrate, ethyl hexanoate, methyl-(3-methylthio)propionate, ethyl-(3-methylthio)propionate, 4-hydroxy-2,5-dimethyl-3(2H)-furanone, Honey: phenyl acetic acid, phenyl acetaldehyde, beta-damascenone Caramel: 3-hydroxy-4,5-dimethylfuran-2(5H)-on, 4-hydroxy-2,5-dimethyl-3(2H)-furanone, 2-hydroxy-3-methyl-2-cyclopenten-1-on, Oat: 2-acetyl-1-pyrroline, (E,E,Z)-2,4,6-nonatrienal, vanillin, Malt: 2-methylbutanal, 3-methylbutanal, 2-acetyl-1-pyrrolin, vanillin, 3-hydroxy-4,5-dimethylfuran-2(5H)-on, isomeric isopropyl methoxypyrazines, isomeric ethyl dimethyl pyrazines, wherein further amounts of mercaptans (thioalcohols) and mono-, di-, tri-sulfides (thioethers), which are relevant from a sensory aspect, can be included in addition to the mentioned aromatic substance components.

38. The aroma-laden gas (10) produced according to the process according to claim 21, wherein the gas is carbon dioxide, and wherein the aroma-laden gas is produced at a temperature of 40° C. or less.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0113] FIG. 1 shows a flowchart of the process for producing an aroma-laden gas with alternatives for various embodiments,

[0114] FIG. 2A shows a schematic illustration for performing step b),

[0115] FIG. 2B shows a schematic illustration for performing step c),

[0116] FIG. 2C shows a schematic illustration for the use of the aroma-laden gas extracted in step c) in a first embodiment,

[0117] FIG. 2D shows a schematic illustration for performing step d),

[0118] FIG. 2E shows a schematic illustration for performing step d1),

[0119] FIG. 3 shows a schematic illustration for performing a process for producing an aroma-laden gas in a first embodiment,

[0120] FIG. 4 shows a basic diagram of a first preferred embodiment of the process for producing an aroma-laden carbon dioxide,

[0121] FIG. 5 shows a schematic illustration for performing a process for producing an aroma-laden gas in a second embodiment,

[0122] FIG. 6 shows a schematic illustration for performing a process for producing an aroma-laden gas in a third embodiment

[0123] FIG. 7 shows a schematic illustration for performing the process for producing an aroma-laden gas in a further embodiment,

[0124] FIG. 8A shows a schematic illustration for performing step b) in a further embodiment,

[0125] FIG. 8B shows a schematic illustration for performing step c) in a further embodiment,

[0126] FIG. 9 shows a basic diagram of a further preferred embodiment of the process for producing an aroma-laden carbon dioxide, in which step (c) is performed in a device, which is suitable for this purpose,

[0127] FIG. 10 shows a schematic illustration for performing step c) in a further embodiment,

[0128] FIG. 11 shows a schematic illustration for performing step c) in a further embodiment.

DETAILED DESCRIPTION

[0129] In a flowchart, FIG. 1 shows an overview of various exemplary embodiments of a process for producing an aroma-laden gas. In step a), a liquid phase 5 is provided, which contains a solvent and one or several aromatic substances 1, 2, 3. They are guided through a solid phase extraction column in step b). For this purpose, an adsorber material 30 is provided, which comes into contact with the liquid phase 5. As a result of guiding the liquid phase 5 provided in step a) through the solid phase 30, a solid phase 35 is obtained, which is laden with one or several aromatic substances. In step c), the one aromatic substance is or several aromatic substances 1, 2, 3 are separated from the laden solid phase 35 by means of at least one gas 2 in a liquid or supercritical state. An aroma-laden gas 10 is thus obtained.

[0130] The aroma-laden gas 10 from step c) can optionally be subjected to a step d), in which a collecting of the gas 10, which is laden with one or several romantic substances, is performed.

[0131] The aroma-laden gas can furthermore be subjected to a step d1), in which an at least partial separation of an aromatic substance or of several, in particular of all, aromatic substances 1, 2, 3 from the gas by extracting an aromatic substance or a mixture of aromatic substances takes place. Either a gas 10, which is enriched with aromatic substance or aromatic substances, or an essentially gas-free aroma or an essentially gas-free mixture of aromatic substances, respectively, is thus created.

[0132] The embodiments illustrated in FIGS. 2A to 11 for performing the steps of processes for producing an aroma-laden gas can be combined to form one embodiment for the specific application. For the selection and the combination of the process steps, the person of skill in the art applies criteria, for example, which comprise location and amount of the resulting starting material, location, amount, and structure of the desired product, space requirement of corresponding plants, and options for the optimization of the plant capacity.

[0133] Step b) is illustrated in FIG. 2A. An adsorber material, which is not laden with aromas at the onset of the guide-through of the aroma-containing liquid 5, forms the solid phase 30. As solid phase 30, for example a microporous adsorber resin without functional group, such as “Lewatit® VP OC 1064 MD PH”, can be used.

[0134] The solid phase 30 is provided in a solid phase extraction column 3. The liquid 5 is guided through it. FIG. 2A shows the state of the column at the beginning of the performance of step b). Aromatic substances thereby accumulate on the adsorber material, so that an aroma-laden solid phase 35 results (see FIGS. 2B and 2C).

[0135] After flowing through the solid phase extraction column 3, the liquid leaves the column 3. The liquid 50 is thereby depleted of aromatic substances, compared to the liquid 5, which flows into the column 3. In particular, the liquid 50 is essentially free from aromatic substances.

[0136] On principle, step c) is illustrated in FIG. 2B. Various embodiments provide options for how the aroma-laden solid phase 35 is provided, and will be described in more detail below. In step c), at least one gas 2 in a liquid and/or supercritical state generally flows through the aroma-laden solid phase 35. Aromatic substances thereby desorb from the aroma-laden solid phase 35 into the gas, which is loaded with aromas, and leaves the column 3 as aroma-laden gas 10.

[0137] According to the illustration in FIG. 2C, the direct introduction into a product 7 is possible according to an embodiment after the separation of the aromatic substance or of several aromatic substances from the laden solid phase 35 by means of at least one gas 2 in a liquid or supercritical state (see FIG. 2B). The gas can remain there and serves, for example, for foaming or for cooperating with a protective gas atmosphere, or the gas can escape from the product, so that the aroma, which is introduced into the product by means of the gas, remains there and aromatizes the product.

[0138] According to the illustration in FIG. 2D, the aroma-laden gas 10 is collected after the separation of the aromatic substance or of several aromatic substances from the laden solid phase 35 by means of at least one gas 2 in a liquid or supercritical state (see FIG. 2B) according to a further embodiment.

[0139] A container 8, into which the aroma-laden gas 10 is introduced and remains there, is provided, for example, for this purpose. The container 8 can be uncoupled from the feeding of aroma-laden gas in particular after reaching the desired fill amount, and can be stored, for example, in a closed manner until the aroma-laden gas 10 is used to aromatize a product.

[0140] In a further development, the aroma-laden gas can pass through a separating means 6, in which an aromatic substance or several, in particular all, aromatic substances are separated from the gas from the aroma-laden gas by extracting an aromatic substance or a mixture of aromatic substances in a step d1). An example for an embodiment of this type of step d1) is illustrated in FIG. 2E. The aroma-laden gas 10 is provided in a container 8 here. In the context of the invention, it is also possible, however, to feed the aroma-laden gas to step d1) immediately after performing step c) (see FIG. 2B), without collecting it beforehand.

[0141] In the embodiment shown in FIG. 2E, a separating means 6 is connected to the container 8. This connection can comprise a transport line, which is arranged between a gas outlet of the container 8 and an inlet of the separating means 6. After passing through the separating means 6, an aroma-depleted gas 20 passes through the separating means. The aroma-depleted gas 20 is preferably essentially free from aromatic substances. The aromatic substances are enriched in the separating means 6 and can be stripped in order to aromatize a product.

[0142] In an arrangement according to FIG. 3, a plant for carrying out the process for producing an aroma-laden gas comprises a solid phase extraction column 3 and a container 8. Both are connected to one another via at least one transport line (not illustrated) for aroma-laden gas. The column 3 has at least connections for the introduction of a liquid 5 and the removal of a liquid 50 as well as for the introduction of a gas 2 and the removal of an aroma-laden gas 10. The transport line can be connected to the connection for the removal of an aroma-laden gas 10. The transport line can furthermore be connected to a connection of the container 8 for the introduction of aroma-laden gas 10. The connections are preferably provided with valves, which can be set, in particular regulated, and allow for or prevent the flow-through of liquid 5, 50 or gas 2, 10, respectively.

[0143] In an embodiment, the guide-through of an aroma-laden liquid phase 5 through the solid phase extraction column 3 can take place first in an arrangement according to FIG. 3, wherein aromatic substances are adsorbed on the adsorber filling thereof, and the liquid 50 leaves the column 3. Gas 2 can then be guided through the column, and leaves the latter as aroma-laden gas 10. In the illustrated embodiment, the aroma-laden gas 10 is introduced from the container 8 into a product 7. However, the aroma-laden gas 10 can also be collected in a container 8 according to the corresponding illustration, for example in FIGS. 2D and 2E, before it is used to aromatize a product.

[0144] The basic diagram of a preferred embodiment of the process is illustrated in FIG. 4, in which step (c) is performed directly in the solid phase extraction column. The liquid phase and gas are guided through the SPE column from the bottom to the top.

[0145] In the shown embodiment, the aroma-laden gas 10 formed thereby is transferred into a container 8 and is guided via a separating means 6. In the shown embodiment, aromatic substances are held back by the separating means, in particular in the container 8. After passing through the separating means 6, an aroma-depleted gas 20 leaves the separating means. It can be reused as gas 2, which is used to strip aromatic substances from the laden solid phase 35. Depending on conditions of the specific application, the gas 20 can be purified and/or temperature-controlled and/or compressed or relaxed, respectively, prior to being reused as gas 2. A dashed line is delineated in FIG. 5 for the recycling of the gas 20 from the separating means 6.

[0146] In the context of the invention, it is also possible to use a separating means, which holds back the gas and which allows the aromatic substances to pass. The further use of the aromatic substances and of the gas are maintained thereby.

[0147] Depending on the type of product 7 and the structure and setup of the product, a product 7 itself can serve as “separating means” 6, as is shown in FIG. 6, in the sense that the aromatic substances from the gas 10 are integrated into the product and the gas 20 escapes from the product. This gas 20 can be collected, this gas can, for example, also be fed to step c) again as part of a recycling. This return for the reuse is suggested by means of a dashed line in FIG. 6.

[0148] According to the illustration in FIG. 7, steps b) of the solid phase extraction (SPE) and c) of the supercritical fluid extraction (SFE) can be performed in the same adsorber column 3 as described above one after the other, but generally also simultaneously. The gas 2, which absorbs the aromatic substances and leaves the column 3 as aroma-laden gas 10, is then also guided through while guiding the starting material 5 through the column 3.

[0149] FIGS. 8A and 8B illustrate an embodiment, in the case of which step c) is performed in a device, which is suitable for this purpose, wherein the laden solid phase 35 obtained in step b) is removed from the solid phase extraction column 3 and is transferred into this device.

[0150] For this purpose, the adsorber material can be provided in particular in a separate packaging, which allows for a simple handling of the adsorber fill. A receptacle 34 is provided, for example, for this purpose.

[0151] The receptacle 34 is designed to receive 30 and/or 35 and can be detachably positioned in the solid phase extraction column 3 in such a way that at least steps b) and c) can be performed during operation, wherein the receptacle 34 is inserted in the SPE column 3, and the starting liquid 5 or the gas 2, respectively, flows through (aroma-laden) absorber arranged therein.

[0152] In the simplest case, this device can be formed by means of the receptacle 34 itself, as shown in FIG. 9. In the embodiment shown there, the receptacle 34 is formed as hose.

[0153] The basic diagram of a further preferred embodiment of the process is illustrated in FIG. 9, in which step (c) is performed in a device, which is suitable for this purpose, wherein the laden solid phase obtained in step (b) is removed from the solid phase extraction column and is transferred into this device.

[0154] In order to facilitate the removal of the aroma-laden solid phase from the SPE column, the sorbent can be accommodated in the SPE column between two frits in a hose made of an inert material, for example of plastic or stainless steel, or in one or several plastic cartridges.

[0155] The removal of the solid phase from the solid phase extraction column and the transfer into a different device is thus made possible in a simple way.

[0156] Such a container, preferably made as hose in a simple way, has in particular at least one connection for introducing gas 2 and a connection for discharging aroma-laden gas 10.

[0157] In a further embodiment, a hose-like container 34 can be inserted into a device (not separately illustrated in FIGS. 8A, 8B, and 9), which has connections for the detachable fastening of a container 34 and the introduction of gas 2 as well as the discharge of aroma-laden gas 10.

[0158] A container 34 inserted into such a device 4 is illustrated in FIG. 11 for the example of a solid phase 353, which is laden with an aroma 3. The device can also be formed to receive several containers 34, one such device 40 is illustrated in FIG. 10 for the example of three solid phases 351, 352, and 353, which are in each case laden with aromas 1, 2, or 3, respectively.

[0159] After performing step c), the process is continued according to the above- and below-described options. Aroma-laden gas can also be introduced directly into a produce from a container 34 as “hose”.

[0160] The device 4; 40 serves to receive the receptacle 34 and the connection thereof for performing step c). In its design, the device 4; 40 corresponds, for example on principle, to a solid phase extraction column, and is therefore designed in a pressure-resistant manner for step c).

[0161] In the context of the invention, the receptacle 34 can also be designed in such a way that step c) can be performed directly by using the receptacles 34. The process is carried out without the use of a device 4; 40 in this case.

[0162] Embodiments are illustrated in FIGS. 10 and 11, in the case of which a gas 100, which is laden with an aroma mixture, is produced. In a first exemplary further development, the gas 100 contains an aroma mixture 123 of the aromas 1, 2, and 3, which were removed from the correspondingly laden solid phases 351, 352, and 353. Step c) can in particular be performed at the point of use of the aroma mixture. The aroma mixture is thereby generated by means of combining the aromas 1, 2, and 3, which are individually extracted from the laden solid phases 351, 352, and 353. The process is further continued according to one of the above-described options. The aroma mixture can, as such or provided in the gas 100, in particular be introduced directly into a product or can be collected.

[0163] A further option for aromatizing a product with a mixture of aromatic substances 1, 2, and 3 is illustrated in FIG. 11. For this purpose, a gas 100 laden with a first mixture of aromatic substances 1, 2, and a gas 10 laden with a further aromatic substance 3 is introduced into a product 7. The product 7 then contains aroma mixture 123.

[0164] The gas 100 and the gas 10 can be introduced into the product so as to overlap in time or one after the other, the aromatization can in particular also be performed at separate locations by means of several, here two, different gases. The gas 100 contains an aroma mixture of the aromas 1 and 2, which were stripped from the correspondingly laden solid phases 351, 352. In this embodiment, the gas 100 is generated by mixing the gases, which are laden with one aromatic substance 1, 2 each. For example, a mixture of the aromatic substances 1 and 2 can be produced first, and the aroma 3 can be extracted separately. The correspondingly laden adsorber material 353 is used in a casing 34 in a connecting device 4.

Exemplary Embodiment 1

[0165] For test purposes, a beer was used as starting solution, which was diluted with water. On principle, any dilutions can be used, for example a dilution by the factor 1:4. In the exemplary embodiment, the beer was diluted with water by the factor 1:20.

[0166] According to step b) of the process, this starting solution was guided through an SPE column. This solid phase extraction column was laden with the adsorber resin LEWATIT® VP OC 1064. This adsorber resin is a crosslinked polystyrene with pore diameters according to manufacturer information of between 5 and 10 nm and a specific surface BET 800 m.sup.2/g.

[0167] An SPE column with a length of approx. 0.5 m and an inner diameter of approx. 20 cm was used. The flow speed during the guide-through of the diluted beer is calculated and set on the basis of the inner diameter of the column and the specification of the adsorber resin. The total amount of the liquid, which is to be guided through, until the absorption capacity of the adsorber resin is depleted, depends on the concentration of the aromatic substances in the starting product. Based on his experience, the person of skill in the art can estimate a possible amount, and then determines the exact maximum capacity by means of tests.

[0168] The laden solid phase, thus the adsorber resin laden with aromatic substances from the diluted beer, was removed from the SPE column and was temporarily stored in a vacuum bag.

[0169] As step c), the adsorber resin laden with aromatic substances from the beer was subjected to an extraction with supercritical CO2. The composition of the aromatic substance composition in the laden solid phase was eluted with ethanol and was examined. In the context of measuring inaccuracies, the concentration of aromatic substances in the ethanol corresponds to the concentration in the CO.sub.2. The beer had an aroma mixture comprising essentially 2-phenylethyl alcohol, octanoic acid, 3-methyl-1-butanol, 2-methyl-1-butanol, hexanoic acid, 3-methylbutyl-acetate, decanoic acid, isobutanol, octanoic acid ethyl ester and ethyl acetate. The composition of these aromatic substances in the laden solid phase resulted from this as follows:

TABLE-US-00002 Aromatic substance Ppm %% by weight Log P 2-phenylethyl alcohol 1772 0.39048899 1.36 octanoic acid 1232.6 0.27162344 2.9 3-methyl-1-butanol 806.2 0.17765927 1.22 2-methyl-1-butanol 297.1 0.06547081 1.22 hexanoic acid 201.3 0.04435973 1.84 3-methylbutyl acetate 68.9 0.01518323 2.12 decanoic acid 51 0.01123868 3.96 isobutanol 47.2 0.01040129 0.69 octanoic acid ethyl ester 31.5 0.00694154 3.9 ethyl acetate 30.1 0.00663302 0.71

[0170] The aroma-laden gas obtained by means of the extraction with supercritical CO.sub.2 has a typical “smell of beer”.

Exemplary Embodiment 2

[0171] A CO.sub.2 laden with beer aromas according to Exemplary Embodiment 1 was produced. According to step d1) of the process, the aromatic substances were then separated from the CO.sub.2 extract stream via a high-pressure membrane as separating means.

[0172] It was thus possible to separate the aromatic substances from the aroma-laden CO.sub.2 and to enrich them, namely at pressures in the range of between approximately 130 bar to approximately 160 bar, and a temperature in the range of from approximately 60° C. to approximately 14° C., preferably at a temperature of approx. 70° C. when using a membrane made of “Teflon® AF2400”.

Exemplary Embodiment 3

[0173] A CO.sub.2 laden with beer aromas according to Exemplary Embodiment 1 was produced, and the aromatic substances were separated from the CO.sub.2 extract stream via a high-pressure membrane as separating means according to step d1) of the process. The CO.sub.2, which was thus filtered off and which is aromatic substance-free, was then recycled for performing step c) of the solid phase extraction.

[0174] The person of skill in the art can see that the invention is not limited to the above-described examples, but, on the contrary, can be varied in a variety of ways. The features of the individually illustrated examples can in particular also be combined with one another or can be exchanged with one another

LIST OF REFERENCE NUMERALS

[0175] 1, 2, 3 aromatic substance [0176] 123 mixture of aromatic substances [0177] 10; 100 aroma-laden gas [0178] 2 gas, in particular gas in the liquid or supercritical state; CO2 [0179] 20 essentially aromatic substance-free gas; gas after passing through a separating step d1); recovered gas [0180] 3 solid phase extraction column; SPE column [0181] 30 solid phase in the essentially unladen state [0182] 34 receptacle or container for receiving 30 and/or 35 [0183] 35 solid phase laden with aromatic substance or aromatic substances [0184] 4; 40 connecting device for receiving 34 for performing step c) [0185] 5 liquid phase; starting material; condensate, rinsing water, secondary stream, side stream, waste stream, or bypass stream from the processing of fruit or from the production of beverages [0186] 50 liquid depleted of aromatic substances [0187] 6 separating means; filter; membrane; CO2-specific membrane; CO2-specific filter [0188] 7 product [0189] 8 container