US PATENT SUBCLASS 202 / 179
.~.~.~.~.~.~ Dephlegmating

Current as of: June, 1999
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202 /   HD   DISTILLATION: APPARATUS

81  DF  APPARATUS {4}
82  DF  .~ Systems {6}
152  DF  .~.~ Separatory {3}
163  DF  .~.~.~ Still {13}
176  DF  .~.~.~.~ With distilland treating devices {2}
177  DF  .~.~.~.~.~ Preheater {3}
179.~.~.~.~.~.~ Dephlegmating

DEFINITION

Classification: 202/179

The distilland enters a device for heat exchange with the distillate vapors, from which it condenses the high-boiling-point constituents.

SEE OR SEARCH CLASS

196, Mineral Oils: Apparatus,

139, for condensing apparatus in which the vapor is partially condensed.

203, Distillation: Processes, Separatory,

22+, for a distillation process in which the feed is heated by indirect heat exchange with the distillate vapor and subclass 87, for a process of fractional condensation of the vapor.