How do you distill the pyridine?

Answer 1

The most convenient ways often involve complexing the pyridine with other molecules. this will change the chemical proporties of both, easing extraction. One method is co-evaporating the pyridine off with toluene. Adding Toluene in a 1:1 ratio will form a complex with a lower boiling point, taking both the pyridine and toluene out of the mixture. Another method is complexing the pyridine with CuSO4. This is done by washing the reaction mixture with a saturated aqueous CuSO4 solution and then separating the layers. The pyridine will remain in the aqueous layer with the CuSO4.

Keep in mind that these, and most other similar processes (like acid washes) will only remove free pyridine, and that some pyridine may be left behind in complexes with your product (salts).

Answer 2

You don't.