Impurities separation by distillation

The process for separating minor impurities from an organic product which comprises introducing the mixture of product and impurities into a fractional distillation column near the upper end and introducing a stream of liquid stripping component into said column near or below the product feed point, providing heat to the column by means of a bottoms reboiler in amount sufficient to vaporize the stream of liquid stripping component, removing an overhead vapor stream comprised of substantially all of the introduced stripping component together with at least a predominance of the impurities, removing a liquid bottoms stream comprised predominantly of the organic product and heating the bottoms to vaporize at least a portion thereof, returning a portion of the vaporized bottoms to provide sufficient heat to the column to vaporize the stream of liquid stripping component, and recovering organic product reduced in impurities.