Question

describe how eugenol was extracted from the clove leaf explain how steam distillation works discuss how eugenol was extracted and isolated from the aquous distillate calculate and comment on the % of eugenol recovered from the clove leaf ( what can I say about what I recovered)

Answer 1

EXTRACTION :

EUGENOL IN CLOVES+steamdistillation+eugenol in distillate+extract withdichloromethane+eugenol in dichloro methane extract+extract with KOH+EUGENOL IN BASE EXTRACT+Wash with dichloro methane+acidifywith HCL+Extract with dichloromethane+EUGENOL IN DICHLOROMETHANE EXTRACT+Wash with distilled water+Nacl+dry with anhydrous sodium sulphate+ distill of dichloro methane=pure EUGINOL IS OBTAINED

PROCEDURE:EUGENOL will be extracted from the distillate using dichloromethane

60 ML of distillate in A 250 ML Seperating funnel.

extract with three 15 ml portions of dichloro methane .for the first two portins, shake the seperatory funnel vigorously.

then emulsion is formed.

draw ff the clear lower layer to the emulsion line for the first 2 extractions.

shake the 3 rd portion less vigorously

Longer period is allow for the the layers to seperate .

combine the dichloromethane extracts.

add enough anhydrous sodium sulphate ,so that it no longer clumps to gether.it should appear to settle as a dry powder.

swirl the flask for a couple of min.

Decant the solvent in to a clean ,dry ERLENMAYER FLASK

Add a wood boiling stick.

Evaporate the solvent on asteam bath in a Hood

The residue of crudeclove oil will be used in the nmr analysis.

percent of yield of euginol=

0.2348gm/10gx100%