Column still
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A column still, also called a continuous still, patent still or Coffey still, is a variety of still consisting of two columns. Column stills can produce rectified spirit.
Coffey still from Kilbeggan Distillery, in County Westmeath, Ireland
Aeneas Coffey
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Aeneas Coffey was an Irish excise official, inventor and distiller. He is known for patenting the Coffey still, which is named after him, and which remains widely used globally.
Column still
…off of the pungent fusel oils, the spirit produced was not highly rectified, and still needed to be stopped frequently for cleaning. In 1830, Irishman Aeneas Coffey patented the two-column, continuous distillation apparatus which bears his name, versions of which are now ubiquitous across the distilling industries…
Aeneas Coffey