On the subcritical extraction of Rosa damascena Mill.

Ana Dobreva, Ivayla Dincheva and Nenko Nenov

Abstract: Subcritical extraction of Rosa damascena Mill. was performed with Freon 143a. The pressure and duration of the process were studied to obtain the yield. It was found that a short-time triple extraction at low pressures of 5-6 bar resulted in the highest yield – 0.151%. The chemical composition of the product revealed a high scent content: β-phenylethyl alcohol (25.6 – 54.1%), citronellol (1.5 – 2.3%), geraniol (1.0 – 3.9%) and nerol (1.9 – 2.9%). The distribution of paraffins’ content was: nonadecane (2.7 – 4.9%), nonadecene (3.1 – 5.6%), eicosane (4.4 – 11.6%) and heneicosane (4.4 – 9.8%). The deviations in the constituents of the day product and the year batch production were discussed. The yield and composition were compared with other rose aromatic products. The content of methyleugenol, potential genotoxic and carcinogenic agent was regular low (0.4 – 0.8%), comparing the essential oil (up to 4%).

Keywords: methyleugenol Abbreviations: TFE 1,1,1,2-tetrafluoroethane; Rosa damascena Mill.; scent compounds; subcritical extraction

Date published: 2021-08-27