High Quality Content by WIKIPEDIA articles! Spinning cone columns are used in a form of steam distillation to gently extract volatile chemicals from liquid foodstuffs while minimising the effect on the taste of the product. For instance, the columns can be used to remove some of the alcohol from wine, 'off' smells from cream, and to capture aroma compounds that would otherwise be lost in coffee processing. The columns are made of stainless steel. Conical vanes are attached alternately to the wall of the column and to a central rotating shaft. The product is poured in at the top under vacuum, and steam is pumped into the column from below. The vanes provide a large surface area over which volatile compounds can evaporate into the steam, and the rotation ensures a thin layer of the product is constantly moved over the moving cone. It typically takes 20 seconds for the liquid to move through the column, and industrial columns might process 16-160 litres per minute. The temperature and pressure can be adjusted depending on the compounds targeted.

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