EXTRACTION OF ETHANOL FROM FRUIT

EXTRACTION OF ETHANOL FROM FRUIT

Aim: to extract ethanol from fruit.

Apparatus: rotary vapor, electrical water bath, measuring cylinder .alcoholic hydrometer, filter paper, volumetric flask, 500ml measuring cylinder, electrical oven, thermometer.

Sample: Starch contained fruit.

 

Procedures for the extraction of ethanol from fruit

•   Allow the sample to decay for some days.

•   Blend the sample and extract the juices.

•  Add potassium tetraoxo-manganate(vii) (KMnO4), saccaromyces(yeast) to the sample and       keep in an oven at 37^0C for some days to be fermented.

•  After fermentation, test the sample with alcoholic hydrometer for the present of ethanol. Sieve 500ml of the sample using white transparent cloth or a filter paper, and take it to the rotary vapor apparatus for the extraction.

note: The evaporation point of ethanol is 78^0C, therefore the temperature of the water bath will be set to 78^0C