Synthesis of liquid and Vaporized air freshener using local material

Chemical Engineering

Three methods are used for oil extraction namely solvent extraction, hydro distillation and enfleurage. Distillation based recovery processes such as steam and vacuum distillation are preferred for the extraction of essential oils from plant materials. Essential oils are very complex in their chemical nature. Fragrance extraction refers to the extraction of aromatic compounds from raw materials and using methods such as distillation, solvent extraction, expression or enfleurage. All of these techniques tend to distort the odor of the aromatic compounds obtain from raw materials. Heat, chemical solvents or exposure to oxygen in the extraction process denature the aromatic compounds either changing their odor character or rendering them odorless. Before perfumes can be composed the odorants used in various perfume compositions must first be obtained. Synthetic odorants are produced through organic synthesis and purified. Odorants from natural sources require the use of various methods to extract the aromatics from the raw materials. The % yield for extraction of perfume oil from lemongrass using steam distillation. For 1:2, 1:3, 1:4 and 1:5 feed to solvent shows the yield 1.6, 1.8 2 and 2.2 % resp. For 1:2, 1:3, 1:4 and 1:5 feed to solvent shows the yield 1.6, 1.8 2 and 2.2 % resp. % yield for extraction of lemongrass oil from lemongrass using Soxhlet extraction. To improve the longevity of the perfume, benzyl salicylate was added to the mixture. The solution was shaken and poured into a 50 ml bottle. Properties for lemon grass oil are color - pale yellow to orange yellow, density – 0.872- 8.897 at 20 oC, Refractive Index – 1.48-1.50 at 20 OC, viscosity – 4.45 cSt. 6.4.5 and pH – 4-5 Gel formulation in the study was made from a mixture of herbal essential oil sodium benzoate, absolute alcohol and lemongrass essential oil in distilled water with a variety of different concentrations of herbal essential oil at 5 ml, 10 ml, 15 ml and 20 ml then performed an evaluation form test gel evaporation of a liquid test during 4 weeks of storage is 60 %, 54 %, 44 % and 28 %.

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