Process for preparing a tea flavouring agent
阅读：384发布：2023-09-30
专利汇可以提供Process for preparing a tea flavouring agent专利检索，专利查询，专利分析的服务。并且A flavouring agent is prepared by treating a solution of aromatic tea constituents in a water-immiscible solvent with an aqueous solution of an alkaline substance and the treated solvent solution is recovered.，下面是Process for preparing a tea flavouring agent专利的具体信息内容。
1. A PROCESS FOR PREPARING A FLAVOURING AGENT CONTAINING AROMATIC CONSTITUENTS OF TEA, COMPRISING FORMING A SOLUTION OF AROMATIC CONSTITUENTS EXTRACTED FROM TEA LEAF AND A WATERIMMISCIBLE SOLVENT THEREFOR, SAID SOLVENT SOLUTION ALSO CONTAINING TEA LEAF EXTRACTED CONSTITUENTS WHICH DEVELOP UNPLEASANT ODOR OR FLAVOUR, MIXING SAID SOLVENT SOLUTION WITH AN AQUEOUS SOLUTION OF AN ALKALINE SUBSTANCE IN AMOUNT SUFFICIENT TO REACT SAID ALKALINE SUBSTANCE WITH SAID CONSTITUENTS OF THE SOLVENT SOLUTION WHICH DEVELOP UNPLEASANT ODOR OR FLAVOUR WHEREBY SAID CONSTITUENTS WHICH DEVELOP UNPLEASANT ODOR OR FLAVOUR ARE TRANSFERRED FROM THE SOLVENT SOLUTION TO SAID AQUEOUS SOLUTION, AND THEN SEPARATING THE RESULTANT MIXTURE INTO AN AQUEOUS PHASE AND A WATER-IMMISCIBLE SOLVENT PHASE CONTAINING AROMATIC CONSTITUENTS OF TEA.
2. A process according to claim 1, in which the solution of aromatic constituents in the water-immiscible solvent is formed by extraction of tea leaf with the solvent.
3. A process according to claim 1, in which the solution of aromatic constituents in the water-immiscible solvent is formed by extraction with the solvent of a substance selected from the group consisting of tea extract and tea distillate.
4. A process according to claim 1, in which the water-immiscible solvent is selected from the group consisting of petroleum ether, pentane, hexane, a halogenated organic solvent and liquid carbon dioxide.
5. A process according to claim 1, in which the water-immiscible solvent is carbon dioxide and the solution of the aromatic constituents is formed by stripping of these constituents from tea leaf with gaseous carbon dioxide followed by liquefaction of the carbon dioxide.
6. A process according to claim 1, in which the water-immiscible solvent is carbon dioxide and the solution of the aromatic constituents is formed by extraction of these constituents from tea leaf with liquid carbon dioxide.
7. A process according to claim 1, in which the alkaline aqueous solution comprises water and a substance selected from the group consisting of alkali metal carbonate, alkali metal bicarbonate, alkali metal hydroxide and alkaline earth metal hydroxide.
8. A process according to claim 1, in which the mixture of water-immiscible solvent and alkaline aqueous solution is maintained as an emulsion for from about 10 to about 20 minutes.
9. A process according to claim 1, in which after separation of the aqueous and solvent phases the water-immiscible solvent is eliminated from the solvent phase and the resultant residue is treated with water to form an aqueous solution of at least a part of the residual aromatic constituents.
10. A process according to claim 9, in which the water-immiscible solvent is eliminated by evaporation under reduced pressure at a temperature below 30*C.
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