Transcription of Extraction of the Essential Oil Limonene from …
1 Extraction of the Essential Oil Limonene from Oranges. Chemistry Department Outreach Team. Ahmed Saleh, Denefield school, Reading 2008. Steam Distillation of orange Peel The Distillation Extraction of Limonene from the Distillate Low molecular weight water Initially an oily water / Limonene mixture can be immiscible compounds can seen condensing on the glassware at a be separated from natural distillation temperature of 98 C. The products by steam temperature will rise to 100oC as the distillate Limonene , an alkene, is distillation. In this case steam composition approaches pure water. extracted into a low density distillation is used to isolate water immiscible solvent (ether). the Essential oil Limonene from the orange peel.
2 The lower layer is the Limonene is concentrated in the peel of an remaining aqueous distillate orange . The orange peel has two distinct layers, the skin and the pith. Limonene Is not distributed evenly between these two layers. Experimentation has shown that only minimal quantities of Limonene can be extracted from the white pith. This outer skin Limonene 's structure accounts for two . Pith thirds of the mass Skin of the peel. The best yields of orange peel cut into small pieces, Limonene are placed into 100 mL of water Mass of orange Peel obtained by using Evaporation of the Solvent only this outer skin. Limonene can be To finalise the The yield of Limonene is about 1% using this observed as an Extraction , the ether outer skin.
3 This is a large yield compared to oily suspension in layer ( 37oC). other Essential oil extractions, where yields the final distillate Heat was evaporated on can range from % by mass. (80 mL). a water bath to leave the Limonene Essential oils can be steam distilled from flowers, leaves, fruits, barks and woods ( 176oC). Essential oils are found in many Limonene (150mg). household products, obtained from 15 g ranging from high end of orange peel skin. cosmetics to basic The Limonene has cleaning materials. an intense aroma of oranges Lavender Patchouli Bergamot Cinnamo
