Method for extracting an odorous extract by an alternative solvent to conventional solvents

A method for extracting an extract of volatile odorous compounds from an organic raw material containing odorous compounds, the method comprising:

• contacting said organic raw material with dimethyl carbonate used as solvent in at least one bath at a temperature between 10° C. and 70° C. so as to charge said dimethyl carbonate solvent with volatile odorous compounds of said organic material to obtain a liquid organic phase;
• collecting the liquid organic phase from said bath, the organic phase comprising an aqueous phase immiscible with the dimethyl carbonate;
• decanting the aqueous phase to eliminate the aqueous phase from the dimethyl carbonate charged with the volatile odorous compounds;
• after elimination of the aqueous phase, partially eliminating by evaporation the dimethyl carbonate and, then, recovering a preconcentrated extract of volatile odorous compounds;
• adding an alcohol or other molecule to the preconcentrated extract of volatile odorous compounds to form an azeotropic mixture with the dimethyl carbonate;
• if the preconcentrated extract of volatile odorous compounds, obtained after partially eliminating the dimethyl carbonate by evaporation, contains water, decanting the preconcentrated extract to eliminate the water before adding the alcohol or other molecule to form the azeotropic mixture;
• and
• concentrating the preconcentrated extract of volatile odorous compounds by evaporation of the azeotropic mixture to obtain an extract of volatile odorous compounds.