In reply to :
Swfa has attempted to distill vinegar and it didn't work well. Swfa was left with a flask filled with disgusting dark brown crap and salt in his flask in the end. Swfa will never consume that brand of vinegar again. Just distill your gaa with a column.
Try using distilled clear vinegar rather than brown malt vinegar !
Extract :
Pure acetic acid is best obtained by forming crystals of cupric acetate (by adding excess of copper carbonate, filtering, and crystallizing), and then, after heating them gently to drive off their water of crystallization, distilling these crystals with concentrated sulphuric acid.
(Copper Carbonate can be obtained via potter suppliers !)
Umm, how interesting !!