Patent ID: 6037492
Filing Date: 2000-03-14
Classification: C07C,C11B,Y02W

Abstract:
A process for obtaining 3-betadihydroxy-28-carboxyoleanene (oleanolic) acid, 2-alpha,3betadihidroxy-28-carboxyoleanene (maslinic) acid and by-products of at least one raw material from the residues of milled whole olives or parts thereof, from the oil cakes produced in oil-mill expellers, from the refuse from three-phase expellers and from the oil-foot refuse taken from the extraction of oil from olives in the manner known as the ""two-phase"" system, said process comprising:separately isolating said acids comprising,(a) adding an essentially non-polar solvent to the raw material for a first solvent extraction;(b) adding a second solvent more polar than said first solvent to the raw material product of step (a) for a second solvent extraction; and(c) adding a third solvent more polar than said second solvent to the raw material product of step (b) for third solvent extraction;whereby the extracted acids are in excess of 80% purity.