It is relatively difficult to extract pyridine from water even if the aqueous solution is basic. The best thing to try is to add your HCl salt to
25-30% potassium carbonate solution (a few ml per gram of salt) in a sep funnel. Add ether and shake vigorously (cautiously). A second ether
extraction may be needed. Dry the extracts over potassium carbonate, remove the ether and distill the recovered pyridine. This is a method I have used
over the years to isolate amino acid esters from their HCl salts and works quite well. I cannot guarantee it will work for pyridine but I would try
it.
AvB |