| abstract |
PROBLEM TO BE SOLVED: To provide a method for eluting an extract containing hydroxytyrosol from olive without using an organic polar solvent. A method for producing an extract containing hydroxytyrosol from olives according to the present invention comprises the steps of (a) acidic hydrolysis of the starting material in water, and the hydrolysis step at a temperature of 70 ° C. -140 ° C, the gauge pressure is up to 20 psi, the pH is 1.0-6.0, (b) removing suspended solids from the hydrolyzed aqueous solution of step (a); The separated aqueous solution is secured by the step, and (c) the step of putting the aqueous solution (A) obtained in the step (b) into the first chromatography column, and the resin in the first chromatography column are: And (d) eluting the product remaining on the chromatography resin with water, selected from acid activated anion exchange resins. [Selection] Figure 1 |