... . ..............
y 6. Fractional distillation of red wine or petroleum (photo)

Materials
Two  well plates 6, lid for well plate 6, silicone rubber tube or transfusion tube (photo 1 and 2), 12 cm needle or two plastic pipette tips (photo), digital multimeter (Conrad VC 333 /   129410, microscale spirit burner or electric hotplate (photo 1), 5 mL (photo 1: 10 mL) distillation vial with septum, clamp or stand (photo 1),  water, ethanol solutions, red wine or petroleum (photo 1 and 2) for distillation
Experimental (for red wine)
1. Put into the distillation flask 3-4 mL of  the solution to be distilled.
2. Add a small copper wire coil for smooth boiling.
3. Set  the distillation apparatus as described in photo 1.
4. Hold the distillation vial with a clamp and heat it gently over the microburner.
5. The well plate 6 has to be immersed in ice-water.
6. Control the distillation by lifting or lowering the distillation vial. The distillate should come out clear and colourless. If some color comes out with the distillate, stop the distillation and restart it.
7. When the temperature has reached 80 / 100°C remove the tube from well 1 and connect it to well 2 / 3.
8. When the distillation is over, stop the heating and remove the lid from the collecting well. Not doing so causes the drawback of distillate to the distillation flask.
9. Check distillate 1 for burning and distillate 3 for electric conductivity.



back...............................first published: 09.04.2003....................last modification: 13.03.2007