Experiments with rapeseed oil
Experiments with rapeseed oil
For the Comenius project
We are what we eat
10.04.2020
Hohentwiel-Gewerbeschule-Singen/CTA/Germany 1

Experiments with rapeseed oil
Saponification
10.04.2020
Hohentwiel-Gewerbeschule-Singen/CTA/Germany 2

Experiments with rapeseed oil
Index
• Theory
• Chemicals and materials
• Method
10.04.2020
Hohentwiel-Gewerbeschule-Singen/CTA/Germany 3

Experiments with rapeseed oil
Theory
Soponification: Cleavage of the esterbonds in a fat molecule by potasium hydroxide or sodium hydroxide
10.04.2020
Hohentwiel-Gewerbeschule-Singen/CTA/Germany
Soap
4

Experiments with rapeseed oil
Chemicals
• 200g rapeseed oil
• 100ml distilled water
• 200ml 25% sodium hydroxide (NaOH)
• Sodium chloride
10.04.2020
Hohentwiel-Gewerbeschule-Singen/CTA/Germany 5

Experiments with rapeseed oil
Materials
• pot
• hot plate with magnetic stirrer
10.04.2020
Hohentwiel-Gewerbeschule-Singen/CTA/Germany 6

Experiments with rapeseed oil
Method
• The rapeseed oil and the distilled water are heated in the pot.
10.04.2020
Hohentwiel-Gewerbeschule-Singen/CTA/Germany 7

Experiments with rapeseed oil
Method
• The solution is stirred and we add the sodium hydroxide.
10.04.2020
Hohentwiel-Gewerbeschule-Singen/CTA/Germany 8

Experiments with rapeseed oil
Method
• The sodium chloride is added to our product.
10.04.2020
Hohentwiel-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.
10.04.2020
Hohentwiel-Gewerbeschule-Singen/CTA/Germany 10

Experiments with rapeseed oil
Transesterification
10.04.2020
Hohentwiel-Gewerbeschule-Singen/CTA/Germany 11

Experiments with rapeseed oil
Index
• Theory
• Chemicals and materials
• Method
10.04.2020
Hohentwiel-Gewerbeschule-Singen/CTA/Germany 12

Experiments with rapeseed oil
Theory
Transesterification:Concersion of a fatty acid glycerol ester molecule into three fatty acid methyl ester molecules
10.04.2020
Hohentwiel-Gewerbeschule-Singen/CTA/Germany
Biodiesel
13

Experiments with rapeseed oil
Chemicals
• 100ml rapeseed oil
• 30ml methanol
• 5 sodium hydroxide pellets
10.04.2020
Hohentwiel-Gewerbeschule-Singen/CTA/Germany 14

Experiments with rapeseed oil
Materials
• condenser for boiling under backflow
• hot plate with magnetic stirrer
10.04.2020
Hohentwiel-Gewerbeschule-Singen/CTA/Germany 15

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
10.04.2020
Hohentwiel-Gewerbeschule-Singen/CTA/Germany 16

Experiments with rapeseed oil
Thank you for listening!
10.04.2020
Hohentwiel-Gewerbeschule-Singen/CTA/Germany 17

Experiments with rapeseed oil
Anja Bubenheimer
Jascha Bandemehr
Katharina Dietz
CTA Singen, Germany
10.04.2020
Hohentwiel-Gewerbeschule-Singen/CTA/Germany 18