US PATENT SUBCLASS 202 / 159
.~.~.~.~ With preheater

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}
158  DF  .~.~.~ Column {4}
159.~.~.~.~ With preheater

DEFINITION

Classification: 202/159

The distilland entering the system is passed through a device in which it is heated previous to admission. The heat may be derived from an extraneous source or from exchange with the outgoing hot waste liquor (slop), or from condensation of the vapors, or from both the latter sources.

SEE OR SEARCH THIS CLASS, SUBCLASS:

150, and 177+.

SEE OR SEARCH CLASS

196, Mineral Oils: Apparatus,

100, 134 and 139.

203, Distillation: Processes, Separatory,

22+, for a distillation process in which the feed is preheated by indirect recovery of heat.