METHOD OF PURIFYING AND RECOVERING SWEETENER

摘要

A method of purifying and recovering a sweetener efficiently in a high yield without conducting complicated steps, which comprises contacting crude methyl N-(3,3-dimethylbutyl)- alpha -L-aspartyl-L-phenylalaninate containing at least methyl alpha -L-aspartyl-L-phenylalaninate as an impurity with a mixed solvent having two layers respectively consisting of water and an organic solvent immiscible with water to extract the methyl N-(3,3-dimethylbutyl)- alpha -L-aspartyl-L-phenylalaninate with the organic solvent layer.