Spinning Band Distillation Equipment

Spinning band distillation is a type of distillation used to separate liquid mixtures which are similar in boiling points. When liquids with similar boiling points are distilled, the vapors produced are mixtures - not pure compounds. Fractionating columns separate the mixture by allowing the mixed vapors to cool, condense, and then vaporize again. This technique uses rotating helical bands (spinning bands) to force the rising vapors into close contact with the descending condensate. The spinning bands are made from either Teflon or metal.

Teflon Versus Metal Spinning Bands

In general, Teflon spinning bands are used for distillations below 225 °C and Metal bands are used for higher temperature distillations.

 

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photo of  B/R Spinning Band Distillation sold by Hitechtrader.com