Aspirin from Willow Bark
Name: trevor ratcliff
I am interested in extracting salicin from willow bark and preparing
aspirin from the extract. I am looking for any "recipes" for the procedure.
Please help me if you can.
An interesting project!
I suggest boiling the bark in plain old hot water, i.e.,
making tea. Then one needs to isolate the aspirin...
I'm no organic chemist but I'd reduce the volume by
evaporation, then put it into a sep funnel with a
relatively safe organic solvent, and try to isolate the
acetic acid by crystallization/recrystallization.
There are probably optimal solvent choices as well as
steps to take in oprder to remove unwanted impurities...
all this is guesswork.
I hope this helped somewhat.
Try finding an organic chemistry laboratory manual and
see if you can find experiments in which this or similar extractions
are carried out.
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Update: June 2012