steam distillation

steam distillation - CHEM212: Organic Chemistry 1 STEAM...

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CHEM212: Organic Chemistry 1 STEAM DISTILLATION Experiment #4 Introduction: The aim of this experiment was to extract cumin oil from cumin seeds via steam distillation, and then to convert this oil into the derivative cumaldehyde 2,4- dinitrophenylhydrazone to be able to take a melting point, and verify the purity of the extracted substance. Results: Yield of Cumin Oil = 0.0249 g % Yield of Cumin Oil = (0.0249g/ 10.0030g) x 100 = 0.249% Yield of Cumaldehyde-2,4-dinitrophenylhydrazone = (0.0321g/ 0.0249g) x 100 = 129% M.P. of Cumaldehyde-2,4-dinitrophenylhydrazone = 116 ºC Accepted M.P. value for Cumaldehyde-2,4-dinitrophenylhydrazone = 241 ºC Discussion: Because the cumin seeds and water were immiscible, steam distillation was required to separate the two. Normally the cumin would have a boiling point of 235 ºC but with this procedure it was possible to distill at a temperature much below that. The process of steam distillation was carried out successfully, and a cloudy distillate was
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This note was uploaded on 08/13/2008 for the course CHEM 212 taught by Professor Harpp during the Fall '08 term at McGill.

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steam distillation - CHEM212: Organic Chemistry 1 STEAM...

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