Process for the preparation of a carnosic acid-rich plant extract

摘要

By extracting a dried and shredded plant material containing carnosic acid with supercritical CO2 at a pressure of at least 200 bar and a temperature of at most 100 ° C, a plant extract rich in carnosolic acid can be produced by in a first step supercritical CO2 in an amount of 10 to 50 kg CO2 each kg of plant material is passed through the plant material to obtain a first CO2 extract, in a second step further supercritical CO2 is passed through the plant material to obtain a second CO2 extract and a carnosolic acid-rich plant extract is separated from the second CO2 extract by lowering the pressure ,