Experiment 2 Formal Report
Experiment 2: Synthesis of Isoamyl Acetate (Banana Flavor)
Paul Symon C. Manuel*, Katherine Merene, Charlene Mondelo, and Pamela Mallari
Department of Chemistry, University of Santo Tomas, Manila, Philippines
Abstract: The purpose of this experiment was to synthesize isoamyl acetate via an esterification reaction between acetic acid and isoamyl alcohol, using concentrated sulfuric acid as a catalyst. The product was washed with sodium hydrogen carbonate, as well as with water, and then dried with anhydrous sodium sulfate. The percent yield of isoamyl acetate was 52.79%. The product was isolated using a combination of techniques – acid-base extraction, drying, and in special cases distillation.
Introduction:
The importance of banana oil as an artificial flavoring in the food industry is immense. Synthetic banana flavorings can be used as a substitute for natural banana flavoring in the event that banana tree crops are damaged or in limited supply. It is important that the artificial banana flavoring be synthesized in such a way that the product has a high level purity. Specifically, the isoamyl acetate product must contain less than 10% isoamyl alcohol and less than 2% acetic acid. Isoamyl alcohol in the product is tolerated up to 10%, since alcohol is a component of natural banana extract. Any more than 2% acetic acid in the product would degrade the flavor of the liquor. Fischer esterification is a process whereby an este r is prepared, and involves heating a carboxylic acid with an alcohol in the presence of an acid catalyst, which is used to expedite the reaction. In this experiment, this process was used to synthesize isopentyl acetate by combining isopentyl alcohol, which was the limiting reagent, with sulfuric acid (which acted as a catalyst) and excess acetic acid. Had equal amounts of acetic acid and isopentyl alcohol been used, approximately only two-thirds of each would be converted to acetate. Using excess acetic acid shifted the equilibrium
Paul Symon C. Manuel*, Katherine Merene, Charlene Mondelo, and Pamela Mallari
Department of Chemistry, University of Santo Tomas, Manila, Philippines
Abstract: The purpose of this experiment was to synthesize isoamyl acetate via an esterification reaction between acetic acid and isoamyl alcohol, using concentrated sulfuric acid as a catalyst. The product was washed with sodium hydrogen carbonate, as well as with water, and then dried with anhydrous sodium sulfate. The percent yield of isoamyl acetate was 52.79%. The product was isolated using a combination of techniques – acid-base extraction, drying, and in special cases distillation.
Introduction:
The importance of banana oil as an artificial flavoring in the food industry is immense. Synthetic banana flavorings can be used as a substitute for natural banana flavoring in the event that banana tree crops are damaged or in limited supply. It is important that the artificial banana flavoring be synthesized in such a way that the product has a high level purity. Specifically, the isoamyl acetate product must contain less than 10% isoamyl alcohol and less than 2% acetic acid. Isoamyl alcohol in the product is tolerated up to 10%, since alcohol is a component of natural banana extract. Any more than 2% acetic acid in the product would degrade the flavor of the liquor. Fischer esterification is a process whereby an este r is prepared, and involves heating a carboxylic acid with an alcohol in the presence of an acid catalyst, which is used to expedite the reaction. In this experiment, this process was used to synthesize isopentyl acetate by combining isopentyl alcohol, which was the limiting reagent, with sulfuric acid (which acted as a catalyst) and excess acetic acid. Had equal amounts of acetic acid and isopentyl alcohol been used, approximately only two-thirds of each would be converted to acetate. Using excess acetic acid shifted the equilibrium
References: http://prezi.com/oojtdpkwez7d/lab-7-synthesis-analysis-of-isopentyl-acetate/ http://www.franklincollege.edu/pwp/lmonroe/Organic%20Chem/Esterification.pdf http://bestsexo.com/videos/empflix/313657/mosaic--yume-021/ http://xhamster.com/movies/1141027/mature_hot_mom_with_young_boy.html * ------------------------------------------------- http://sex-hq.com/tube/milf/