Experiments with rapeseed oil For the Comenius project We are what we eat...
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Transcript of Experiments with rapeseed oil For the Comenius project We are what we eat...
Experiments with rapeseed oil
Experiments with rapeseed oilFor the Comenius project
We are what we eat
04/19/23Hohentwiel-Gewerbeschule-Singen/CTA/Germany 1
Experiments with rapeseed oil
Index• Theory
• Chemicals and materials
• Method
04/19/23Hohentwiel-Gewerbeschule-Singen/CTA/Germany 3
Experiments with rapeseed oil
TheorySoponification: Cleavage of the esterbonds in a fat molecule by potasium hydroxide or
sodium hydroxide
04/19/23Hohentwiel-Gewerbeschule-Singen/CTA/Germany 4
Soap
Experiments with rapeseed oil
Chemicals• 200g rapeseed oil
04/19/23Hohentwiel-Gewerbeschule-Singen/CTA/Germany 5
• Sodium chloride
• 200ml 25% sodium hydroxide (NaOH)
• 100ml distilled water
Experiments with rapeseed oil
Materials• pot
04/19/23Hohentwiel-Gewerbeschule-Singen/CTA/Germany 6
• hot plate with magnetic stirrer
Experiments with rapeseed oil
Method• The rapeseed oil and the distilled water are heated in the pot.
04/19/23Hohentwiel-Gewerbeschule-Singen/CTA/Germany 7
Experiments with rapeseed oil
Method• The solution is stirred and we add the sodium hydroxide.
04/19/23Hohentwiel-Gewerbeschule-Singen/CTA/Germany 8
Experiments with rapeseed oil
Method• The sodium chloride is added to our product.
04/19/23Hohentwiel-Gewerbeschule-Singen/CTA/Germany 9
Experiments with rapeseed oil
Method• Finally the soap is seperated from water and glycerol. The soap can be pressed into shape now.
04/19/23Hohentwiel-Gewerbeschule-Singen/CTA/Germany 10
Experiments with rapeseed oil
Transesterification
04/19/23Hohentwiel-Gewerbeschule-Singen/CTA/Germany 11
Experiments with rapeseed oil
Index• Theory
• Chemicals and materials
• Method
04/19/23Hohentwiel-Gewerbeschule-Singen/CTA/Germany 12
Experiments with rapeseed oil
TheoryTransesterification:Concersion of a fatty
acid glycerol ester molecule into three fatty acid methyl ester molecules
04/19/23Hohentwiel-Gewerbeschule-Singen/CTA/Germany 13
Biodiesel
Experiments with rapeseed oil
Chemicals• 100ml rapeseed oil
04/19/23Hohentwiel-Gewerbeschule-Singen/CTA/Germany 14
• 5 sodium hydroxide pellets
• 30ml methanol
Experiments with rapeseed oil
Materials
• condenser for boiling under backflow
04/19/23Hohentwiel-Gewerbeschule-Singen/CTA/Germany 15
• 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
04/19/23Hohentwiel-Gewerbeschule-Singen/CTA/Germany 16
Experiments with rapeseed oil
Thank you for listening!
19.04.23Hohentwiel-Gewerbeschule-Singen/CTA/Germany 17