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Pot stills at the Lagavulin Distillery. A pot still is a type of distillation apparatus or still used to distill liquors such as whisky or brandy.In modern (post-1850s) practice, they are not used to produce rectified spirit, because they do not separate congeners from ethanol as effectively as other distillation methods.
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 ...
English: Prohibition-era copper still pot, column, and condenser (c. 1920). From the collection of the McCleary Historical Museum, McCleary, Washington. Photo taken at "Stills in the Hills", a 2012 exhibit about bootlegging during the Prohibition era in the United States, at White River Valley Museum, Auburn, Washington.
This still had a pot still type-kettle, but replaced the traditional lyne arm and cooling worm with a vertical column of perforated plates. [7] Although many of the details of Cellier-Blumenthal's column were improved upon in later years, the general concept was to provide the basis for future column still designs. [5]
Between his Dublin education and his work as an excise officer, Aeneas Coffey had ample opportunity to observe the design and workings of whiskey stills; Ireland was the world's leading producer of whiskey in the 19th century, and Dublin was at the centre of that global industry. Coffey observed a design alternative to the traditional copper ...
the "cucurbit" (Arabic: ḳarʿa; Greek: βῖκος, bîkos), the still pot containing the liquid to be distilled, which is heated by a flame; the "head" or "cap" (إِنْبِيق, ʾinbīq; Greek ἄμβιξ, ambix) which fits over the mouth of the cucurbit to receive the vapors, with an attached downward-sloping "tube" (σωλήν, sōlēn)
Traps designed to remove or measure very small amounts of water may be closed, with no tap. The lower end of a reflux condenser fits into the top of the cylinder. Immediately below the joint between the condenser and the cylinder is a sloping side-arm that joins the cylinder to a reaction flask.
The geometry of the still also plays a role in determining how much reflux occurs. In a pot still, if the tube leading from the boiler to the condenser, the lyne arm, is angled upward, more liquid will have a chance to condense and flow back into the boiler leading to increased reflux. Typical results can increase production as high as 50% over ...