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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 (95% ABV ). Description
Coffey observed a design alternative to the traditional copper pot alembic still commonly used in Ireland, known as the continuous, or column, still. First patented by a Cork County distillery in 1822, the column still remained a relatively inefficient piece of equipment, although it pointed the way towards a cheaper and more productive way to ...
Image 1: Typical industrial distillation towers Image 2: A crude oil vacuum distillation column as used in oil refineries. Continuous distillation, a form of distillation, is an ongoing separation in which a mixture is continuously (without interruption) fed into the process and separated fractions are removed continuously as output streams.
The modern, triple column still at the Belmopan distillery owned by the Perdomo family, Travellers Liquors, Belize. Photo credit-Dan Carey You cannot overwrite this file.
In 1822, Anthony Perrier developed one of the first continuous stills, and then, in 1826, Robert Stein improved that design to make his patent still. In 1830, Aeneas Coffey got a patent for improving the design even further. [37] Coffey's continuous still may be regarded as the archetype of modern petrochemical units. The French engineer Armand ...
Pot still distillation gives an incomplete separation, but this can be desirable for the flavor of some distilled beverages. If a purer distillate is desired, a reflux still is the most common solution. Reflux stills incorporate a fractionating column, commonly created by filling copper vessels with glass beads to maximize available surface ...
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In Ireland, where regulations define "pot still whiskey" as one distilled from a specific mixed mash of at least 30% malted barley, at least 30% unmalted barley, and other unmalted cereals in a pot still, "grain whisky" refers to whisky produced from a mixed mash of no more than 30% malted barley in a column still. [1]