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

摘要

Methods for extracting an extract of volatile odorous compounds from an organic raw material containing odorous compounds is disclosed. The method includes contacting an organic raw material with dimethyl carbonate, as a solvent, in at least one bath at a temperature of 10° C. to 70° C. A liquid organic phase is obtained that includes the dimethyl carbonate charged with volatile odorous compounds and is collected. If the liquid organic phase comprises an immiscible aqueous phase, decanting occurs to separate the dimethyl carbonate charged with odorous compounds therefrom thereby eliminating the aqueous phase. Next, partially eliminating by evaporation forms a pre-concentrated extract of volatile odorous compounds, which is recovered and if water is present, decanting occurs to eliminate the water. Additionally, concentrating the pre-concentrated extract of volatile odorous compounds by evaporation is performed to obtain the extract of volatile odorous compounds.

主权项

1. 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; if the collected liquid organic phase comprises an aqueous phase that is immiscible with the dimethyl carbonate resulting from organic material, decanting the liquid organic phase to separate the dimethyl carbonate charged with the volatile odorous compounds from said immiscible aqueous phase; wherein the aqueous phase is eliminated; partially eliminating by evaporation the dimethyl carbonate, subsequently, decanting to eliminate water, 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; and concentrating the preconcentrated extract of volatile odorous compounds by evaporation of the azeotropic mixture to obtain an extract of volatile odorous compounds.