Patent ID: 8697171
Filing Date: 2014-04-15
Classification: A23F

Abstract:
1. A process for preparing a purified green-tea extract comprising, in the solid content thereof, from 36 to 99 mass % of non-polymer catechins, which process comprises, in order, bringing a green tea extract into contact with a mixed solution comprising an organic solvent and water at an initial mass ratio of from 80/20 to 96.5/3.5 and acid clay or active clay, thereby forming a composition, filtering the composition thereby forming a green-tea extract solution; adding water to the green-tea extract solution whereby the organic solvent/water mass ratio in the green-tea extract solution is adjusted from the initial mass ratio to a final mass ratio of from 0.5/99.5 to 65/35, separating a turbidity component precipitated in the solution, bringing the solution after said separating into contact with active carbon, and removing the active carbon.