(under subclass 138) Condensing apparatus, peculiar to this art, generally known in the art as dephlegmators or fractionating columns, where the condensate formed in cooler zone is reheated and partially revaporized by vapors in a hotter zone.
SEE OR SEARCH THIS CLASS, SUBCLASS:
100, for similar devices combined with combined condensing and vaporizing apparatus.
30, for a proocess of fractioonally condensing removed vapor.
202, Distillation: Apparatus, subcalsses 153 and 158, for distillation apparatus including a fractionating column, and 179, and 198 for distillation apparatus including a dephlegmator.
203, Distillation: Processes, Separatory,
22, and 87, for a distillation process in which tthe distillation process in which the vapor is in indirect heat exchange with the feed or the vapor is fractionally condensed.
260, Chemistry of Carbon Compounds, appropriate subclasses.
261, Gas and Liquid Contact Apparatus, appropriate subclasses.
