Most methods of iodine extraction I have found on here and on the web seem to disgard the ethanol from the tincture with dilution or evapouration.
It seems a lot of potential iodine is wasted or washed away with the "orange water layer"
Post 237276 (missing)
(Aurelius: "newbee info", Newbee Forum), and it also seems that good old ethanol is wasted as well.
In another process (found on rhodiums site) the ethanol is evapourated on a low heat leaving iodine and potassium iodide. There must be quite a bit of iodine lost doing it this way due to sublimation when the tincture is heated.
How can this ethanol be removed without removing some iodine with it ?
Can the sublimation of iodine be reduced by evapourating the ethanol off under reduced pressure ?
Do sublimation points change like boiling points with pressure changes ?
Can we turn the ethanol into something else and seperate it from the iodide and the iodine easier ?
Could we not remove this ethanol by oxidising it to acetaldehyde and removing this with less heat than ethanol ?
Leonard Cohen cheers me up !