Experiments with rapeseed oil For the Comenius project We are what we eat 10.09.2015Hohentwiel-Gewerbeschule-Singen/CTA/Germany1.

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Presentation transcript:

Experiments with rapeseed oil For the Comenius project We are what we eat Hohentwiel-Gewerbeschule-Singen/CTA/Germany1

Experiments with rapeseed oil Saponification Hohentwiel-Gewerbeschule-Singen/CTA/Germany2

Experiments with rapeseed oil Index Theory Chemicals and materials Method Hohentwiel-Gewerbeschule-Singen/CTA/Germany3

Experiments with rapeseed oil Theory Soponification: Cleavage of the esterbonds in a fat molecule by potasium hydroxide or sodium hydroxide Hohentwiel-Gewerbeschule-Singen/CTA/Germany4 Soap

Experiments with rapeseed oil Chemicals 200g rapeseed oil Hohentwiel-Gewerbeschule-Singen/CTA/Germany5 Sodium chloride 200ml 25% sodium hydroxide (NaOH) 100ml distilled water

Experiments with rapeseed oil Materials pot Hohentwiel-Gewerbeschule-Singen/CTA/Germany6 hot plate with magnetic stirrer

Experiments with rapeseed oil Method The rapeseed oil and the distilled water are heated in the pot Hohentwiel-Gewerbeschule-Singen/CTA/Germany7

Experiments with rapeseed oil Method The solution is stirred and we add the sodium hydroxide Hohentwiel-Gewerbeschule-Singen/CTA/Germany8

Experiments with rapeseed oil Method The sodium chloride is added to our product Hohentwiel-Gewerbeschule-Singen/CTA/Germany9

Experiments with rapeseed oil Method Finally the soap is seperated from water and glycerol. The soap can be pressed into shape now Hohentwiel-Gewerbeschule-Singen/CTA/Germany10

Experiments with rapeseed oil Transesterification Hohentwiel-Gewerbeschule-Singen/CTA/Germany11

Experiments with rapeseed oil Index Theory Chemicals and materials Method Hohentwiel-Gewerbeschule-Singen/CTA/Germany12

Experiments with rapeseed oil Theory Transesterification:Concersion of a fatty acid glycerol ester molecule into three fatty acid methyl ester molecules Hohentwiel-Gewerbeschule-Singen/CTA/Germany13 Biodiesel

Experiments with rapeseed oil Chemicals 100ml rapeseed oil Hohentwiel-Gewerbeschule-Singen/CTA/Germany14 5 sodium hydroxide pellets 30ml methanol

Experiments with rapeseed oil Materials condenser for boiling under backflow Hohentwiel-Gewerbeschule-Singen/CTA/Germany15 hot plate with magnetic stirrer

Experiments with rapeseed oil Method The chemicals are placed in the round bottomed flask. Then we heat to the boil under backflow cooling. The final step is to separate the resulting biodiesel from glycerol and water Hohentwiel-Gewerbeschule-Singen/CTA/Germany16

Experiments with rapeseed oil Thank you for listening! Hohentwiel-Gewerbeschule-Singen/CTA/Germany17

Experiments with rapeseed oil Anja Bubenheimer Jascha Bandemehr Katharina Dietz CTA Singen, Germany Hohentwiel-Gewerbeschule-Singen/CTA/Germany18