PROCEDURE FOR SELECTIVE EXTRACTION OF ACTIVE PRINCIPLED AND/OR OLEORESINS FROM VEGETABLE MATERIAL AND RELATED SYSTEM

A process for the extraction of oleoresins from vegetable material by solvent comprising the following successive steps:a solvent washing step of vegetable material in maceration means controlled in temperature and/or pressure for a time varying between 10 and 60 minutes, with a proportion between the mass of vegetable material to be treated and the volume of solvent between 1:5 kg/l 1:10 kg/l; the temperature is controlled by means of a cryogenic fluid and is between −60 ° C. and −100 ° C., thus obtaining a mixture containing a solid fraction, and a liquid fraction in which the oleoresins dissolved in the solvent are included;a pressing step of the mixture in order to separate the solid fraction of vegetable material from the liquid fraction of solvent containing the oleoresins;a step of filtration of the liquid fraction of the mixture;a step of separation of the solvent from the liquid fraction of the mixture in an evaporator, controlled under pressure and temperature, in which the pressure is between 10 mbar and 50 mbar and the temperature is between 10° C. and 40° C., thus obtaining so the active principles and/or the oleoresins.