Vanillin Essay

1262 words - 6 pages

AbstractThe purpose of this experiment was to isolate eugenol oil from cloves by steam distillation as the main technique. This experiment had a percent yield of 8.08%, which is relatively low due to the lost of the final product. Sodium bicarbonate was added instead of anhydrous sodium sulfate that lead to the lost of product. HCL acid was added to get the solution back a pH of 1 or 2. The solution was the boil to obtain the final product. The final product was brown oil that was then analyzed with its IR spectrum. The IR spectrum concluded that the final product was mostly eugenol and that the erroneous addition of sodium bicarbonate did not affect the final product. Analysis of the IR ...view middle of the document...

The principle of steam distillation is based on the fact that two immiscible liquids will boil at a lower temperature than the boiling points of either pure component, because the total vapor pressure of the heterogeneous mixture is simply the sum of the vapor pressures of the individual components. The higher total vapor pressure leads to a lower boiling point for the mixture than for either single component. During the isolation of a liquid natural product by steam distillation, water is one of the components, and the liquid natural product being isolated is the other component. The product can be steam distilled from the natural source at a relatively low temperature, thus avoiding decomposition of the product.[1: http://www.scribd.com/doc/124637481/Isolation-and-Characterization-of-Eugenol-From-Cloves ][2: Pavia, D. L.; Lampman, G. M.; Kriz, G. S.; Engel, R. G. Introduction to Organic Laboratory Techniques, A Microscale Approach; 3rd ed.; Brooks/Cole: Pacific Grove, CA, 1999; p. 663.][3: Pavia, D. L.; Lampman, G. M.; Kriz, G. S.; Engel, R. G. Introduction to Organic Laboratory Techniques, A Microscale Approach; 3rd ed.; Brooks/Cole: Pacific Grove, CA, 1999; p. 628]Procedure 10.03 gram of fresh cloves was weighted and grinded. The power was transfer to a 150 mL bottom flask and 100 mL of DI water was added. The solution was distilled and 60 mL were collected. The distillate was transferred to a separatory funnel and extraction with 3 portion of 20 mL methylene chloride. 1 mL of aliquot oil was collected and label crude oil. Anhydrous sodium sulfate was added and the index refraction was measured. The aqueous layer was kept and label aqueous one. The remaining organic layer was transferred back t o the separatory funnel and extracted with 3 20 mL portions of 3M NaOH solution. The basic aqueous layers were combined in a 500 mL flask and kept for next part. The organic layer was transfer to a beaker; anhydrous sodium sulfate was added, then...

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