Produces hashoil too:
pic1,
pic2,
pic3,
pic4,
pic5.
Quote:isnt it a dangerous idea to use open fire like that with flammable solvents like ethanol?!
Yes.
While you're cooking isn't
so dangerous. The stewpot is locked, the steam don't skip.
The aluminum foil work like a diaphragm.You can see it going up and down as the pressure changes and you can control it by fire power.
If you kept it on fire towards evaporate the alcohol the steam can fly to the flame and start a bonfire. If you are still alive can cover the pan to stop to burning.
You can use something like a pressure cooker with a serpentine plug on the exhaust valve. The solvent will condenses in the worm pipe and you can retrieve it.
Estimating how much solvent condensesYou can't look inside the soxhlet during the extraction. So you have to estimate what are happening.
Supposes the alcohol vapor condense and drips athwart the aluminum foil cooling from boiling point to 40ºC.
Code:1 liter of alcohol are 0.789 kilos
condense 0.789kg of alcohol gives 675kj
cool 0.789kg of alcohol from 80ºC to 40ºC gives 0.789*2520*40 = 79531.2kj
total = 80206.2kj
The ice melts and then the water heats from 0ºC to 40ºC. How much mass is needed to get 80200kj?
Code:
80200 = m*4200*40 + m*334
m = 0.47kg
so if you melts 5 liters of ice and keep the water above the condenser at 40ºC you'll have passed throught the sample 10 liters of alcohol.
Quote:but wouldn't it be easier/simpler to boil the plant material in the solvent with constant agitation for a long time, and then filtrating?
Sure, very more simple. But sometimes i don't have all the necessary solvent or it's too expensive
This time i used only 1.5l of alcohol and 8.5l of ice. The soxhlet recycled the solvent making available virtually 17l of solvent.
The internal jug have 0.75l, so was 22,5 small baths. If all the soxhletting take 4 hour than each baths lasted like 10 minutes.