Method of preparation of extracts of hops
阅读：1019发布：2021-01-23
专利汇可以提供Method of preparation of extracts of hops专利检索，专利查询，专利分析的服务。并且A method of preparation of extracts of hops by means of one or more organic solvent, this method comprising the isomerization of the hop acids and includes isomerizing the Alpha -acids of the hops in the presence of a solvent selected from among the group comprising isooctane and methyl cyclohexane.，下面是Method of preparation of extracts of hops专利的具体信息内容。
2. The method as claimed in claim 1, wherein the isomerizing is by heating, and wherein the recovering of the iso- Alpha -acids comprises the steps of acidifying the mixture of the aqueous phase and the organic phase, separating the organic phase from the aqueous phase, and evaporating the organic phase to a syrupy paste.
2. mixing said solvent extract with an aqueous alkaline solution forming a mixture comprising an aqueous phase and an organic phase,
3. isomerizing the Alpha -acids of the hops into iso- Alpha -acids in said mixture and thereby in the presence of said solvent, and
3. The method as claimed in claim 2, wherein the recovering of the iso- Alpha -acids subsequent to the separating of the organic phase from the aqueous phase includes additionally repeatedly extracting any remaining iso- Alpha -acids from the aqueous phase by adding an additional quantity of an organic solvent to the aqueous phase, separating the aqueous and organic phases, and combining said organic phases.
4. The method as claimed in claim 2, wherein said extract contains about 50 g of Alpha -acids per liter of said organic solvent.
4. recovering the iso- Alpha -acids.
5. The method as claimed in claim 4, wherein said aqueous alkaline solution is added at a volume ratio to the extract of 4: 1 and wherein said aqueous alkaline solution comprises 0.3 gram-equivalents of sodium carbonate per liter of solution.
6. The method as claimed in claim 2, wherein the heating of the mixture is by refluxing the mixture with good stirring for 60 minutes or longer.
7. The method as claimed in claim 1, wherein the isomerizing is by heating and wherein the recovering comprises separating the aqueous phase from the organic phase, and extracting the iso-Alpha -acids from the aqueous phase.
8. The method as claimed in claim 1, wherein the isomerizing is by heating and wherein the recovering comprises separating the aqueous phase from the organic phase, bringing the aqueous phase containing the iso- Alpha -acids to a pH of 7, adding a saturated hydrocarbon to the aqueous phase forming an aqueous phase and an organic phase, separating the aqueous and organic phases, bringing the aqueous phase to a pH of 3, extracting the iso-Alpha -acids from the aqueous phase with an organic solvent not miscible with water to dissolve the iso- Alpha -acids, separating the organic solvent containing the iso- Alpha -acids and collecting the iso- Alpha -acids by evaporation of the solvent.
9. The method as claimed in claim 1, wherein said method subsequent to recovering the iso- Alpha -acids additionally comprises converting the iso- Alpha -acids into the salts thereof, in which said salts formed are more soluble in water than the free iso- Alpha -acids.
10. The method as claimed in claim 9, wherein said salts are selected from the group consisting of the sodium salts and the potassium salts.
11. The method as claimed in claim 8, wherein the saturated hydrocarbon in the recovering is selected from the group consisting of iso-octance and methyl cyclohexane.
12. The method as claimed in claim 8, wherein the organic solvent not miscible with water is a chlorinated hydrocarbon.
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