Stills, patent Coffey

There are two kinds of Scotch whislg malt whisky, which is made by the pot still process, and grain whisky, which is made by the patent still (or Coffey still) process. Malt whislq is made from malted barley only, whereas grain whislg is made from malted barley together with unmalted barley and other cereals. 

Feints. Feints are the third fraction of the distillation cycle derived from the distillation of low wines in a pot still. This scotch term is also used to describe the undesirable constituents of the wash that are removed during the distillation of grain whiskey in a continuous patent still (Coffey). These are... 

Grain Whiskey. Grain whiskey is an alcoholic distillate from a fermented wort derived from malted and unmalted badey and com, in varying proportions, and distilled in a continuous patent still (Coffey). 

Patent Stills,—By far the greater quantity of ordinary alcohol is distilled in a patent still, the invention of Aeneas Coffey. In this process the alcohol is expelled by blowing steam through the wash which is spread in layers over a considerable surface. The wash enters at the top of the still and passes downwards over a series of perforated copper plates in which are small orifices, where the liquid is... 

Various other continuous stills have been patented, but their essential principle is similar to that of Coffey s apparatus. 

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