A sustainable sequential process for fractionating essential oil, said process being based on carbon dioxide solvents of increasing polarity in combination with a support, said process comprising the steps of: a) providing an inert adsorbing support having a pore volume ranging between 0.2 and 1 cm 3 /g, a specific surface area ranging between 50 and 1000 m 2 /g, an average particle size ranging between 5 and 10 nm, a pH ranging between 3 and 11, and a density ranging between 100 and 1500 g/l; b) loading essential oil onto the support of step a) at a loading rate ranging between 1 and 70 mass%; c) optionally separating a first fraction of essential oil with liquid or mildly supercritical carbon dioxide at a first temperature ranging between -10 °C and 50 °C and a first pressure ranging between 20 bars and 85 bars and a first flow rate ranging between 1 and 25 % load/minute until complete separation is achieved or the extract yield falls below 0.1 % of starting mass per hour and recovering said fraction; d) optionally separating a second fraction with supercritical carbon dioxide at a second temperature of at least 31 °C and a second pressure of at least 72.8 bars and a second flow rate ranging between 1 and 25 % load/minute until complete separation is achieved or the extract yield falls below 0.1% of starting mass per hour and recovering said fraction; e) optionally, continuing the separation process with supercritical carbon dioxide at another set of increasing temperature and/or pressure until all desired fractions are separated; f) separating a new fraction with supercritical carbon dioxide at a temperature of at least 31 °C and a pressure of at least 72.8 bars and a flow rate ranging between 1 and 25 % load/minute combined with a co-solvent at a level ranging between 0.05 and 99.95 % of the CO 2 flow rate, said co-solvent addition being either constant or gradually increasing, until complete separation is achieved or the extract yield falls below 0.1 % of starting mass per hour and recovering said fraction; g) optionally, continuing the separation process with supercritical carbon dioxide at another set of increasing temperature and/or pressure and/or percentage of co-solvent until all desired fractions are separated; h) soaking the support resulting from step f) or of step g) in an environmentally friendly solvent; i) decanting or filtering the environmentally friendly solvent from the support and subsequently evaporating or distilling said solvent; j) optionally retrieving the remaining unseparated residues; with the restriction that at least one of steps c) and d) is present and said process being characterised in that the support is selected in terms of its volumetric capacity, its surface chemistry and its particle size, according to the nature of the essential oil to be modified a) providing an inert adsorbing support having a pore volume ranging between 0.2 and 1 cm 3 /g, a specific surface area ranging between 50 and 1000 m 2 /g, an average particle size ranging between 5 and 10 nm, a pH ranging between 3 and 11, and a density ranging between 100 and 1500 g/l; b) loading essential oil onto the support of step a) at a loading rate ranging between 1 and 70 mass%; c) optionally separating a first fraction of essential oil with liquid or mildly supercritical carbon dioxide at a first temperature ranging between -10 °C and 50 °C and a first pressure ranging between 20 bars and 85 bars and a first flow rate ranging between 1 and 25 % load/minute until complete separation is achieved or the extract yield falls below 0.1 % of starting mass per hour and recovering said fraction; d) optionally separating a second fraction with supercritical carbon dioxide at a second temperature of at least 31 °C and a second pressure of at least 72.8 bars and a second flow rate ranging between 1 and 25 % load/minute until complete separation is achieved or the extract yield falls below 0.1% of starting mass per hour and recovering said fraction; e) optionally, continuing the separation process with supercritical carbon dioxide at another set of increasing temperature and/or pressure until all desired fractions are separated; f) separating a new fraction with supercritical carbon dioxide at a temperature of at least 31 °C and a pressure of at least 72.8 bars and a flow rate ranging between 1 and 25 % load/minute combined with a co-solvent at a level ranging between 0.05 and 99.95 % of the CO 2 flow rate, said co-solvent addition being either constant or gradually increasing, until complete separation is achieved or the extract yield falls below 0.1 % of starting mass per hour and recovering said fraction; g) optionally, continuing the separation process with supercritical carbon dioxide at another set of increasing temperature and/or pressure and/or percentage of co-solvent until all desired fractions are separated; h) soaking the support resulting from step f) or of step g) in an environmentally friendly solvent; i) decanting or filtering the environmentally friendly solvent from the support and subsequently evaporating or distilling said solvent; j) optionally retrieving the remaining unseparated residues;