Fracionamento do óleo essencial de Patchouli [Pogostemon cablin (Blanco) Benth.] obtido por extração supercrítica
The fractionation of the essential oil of patchouli [Pogostemon cablin (Blanco) Benth.] extracted with supercritical carbon dioxide (CO2_SC) was studied. This oil is widely used by industries of cosmetics and fragrances. Bringing up of work pressure and temperature at 100 bar and 32 ° C, respectively, were studied some parameters never before investigated for the patchouli. The work was divided into four subjects of study: increasing yield varying the static period and the total time of extraction; analysis of the optimal particle size; harvest period; chemical composition of the essential oil. The static period combined with the time of collection of samples was studied with the objective of increasing the yield of the process, resulting in an ideal time of 20 minutes of static period and time for collection of samples. Three "averages" particles sizes were studied for two different flows of solvent. The ideal particle size for the supercritical extraction of essential oil of patchouli was 0.346 mm, at flow rate of 1.2 L / min of CO2. Lots of patchouli leaves harvested at different times of the year were used for extraction of its essential oil. The time of the year which it was obtained better yield is the winter. The chemical composition of the essential oil of patchouli was studied with the intention of knowing that process time the main compounds (patchoulol and a-bulnesene) are extracted. Samples of essential oil analyzed results provided sufficient to trace the profile of concentration of these compounds. Knowing the perfect time of collection of samples, can be possible to establish a method for the fractionation of patchouli essential oil.
Advisor:Ricardo Antonio Francisco Machado; Ariovaldo Bolzan; Haiko Hense; Luiz Alberto Vieira Sarmento
School:Universidade Federal de Santa Catarina
Source Type:Master's Thesis
Date of Publication:02/22/2008