.~ And returning product of distillation step to distillation zone
DEFINITION
Classification: 203/94
(under subclass 91) Processes directed to returning a product of the distillation operation to the distillation zone.
(1) Note. To be considered a product of distillation for purposes of this subclass an overhead vapor or side stream must be condensed to a liquid before being returned to the distillation zone. In other words to be considered a "product" the substance must be isolated outside the distillation zone.
SEE OR SEARCH CLASS
208, Mineral Oils: Processes and Products,
358, for a mineral oil distillation process in which condensate or residue is returned to the rectification zone after having been removed therefrom to assist in the separation process.
