Process for the modification of Curcuma aromatica essential oil

A process of obtaining a fragrance product of modified essential oils from Curcuma aromatica, wherein the said process comprising the steps of:

• (i) providing essential oils from Curcuma aromatica;
• (ii) mixing the essential oils in step (i) with an organic solvent in a ratio ranging between 1:5-1:40 to obtain a reaction mixture;
• (iii) cooling the reaction mixture obtained in step (ii) at a temperature range of 10° C. to −20° C.;
• (iv) reducing the cooled reaction mixture obtained in step (iii) by gradually adding a reducing agent to the reaction mixture at a ratio ranging between 1:0.1-1:2, respectively, for a period of 1 hour to 48 hours and at a stirring speed of 100 rpm-1500 rpm, then adding ice water to the reaction mixture to terminate the reaction;
• (v) extracting the reaction mixture obtained in step (iv) three to five times with a solvent at a temperature range of 5° C. to 35° C.;
• (vi) acidifying the solvent extract obtained in step (v) with a dilute acid water to a pH of less than 1 to obtain an acidified extract, then washing the acidified extract with water to obtain a washed product;
• (vii) removing the solvent from the washed product obtained in step (vi) at a temperature range of 40° C. to 50° C. to obtain the fragrance product of modified essential oils from Curcuma aromatica.