US PATENT SUBCLASS 202 / 174
.~.~.~.~.~.~ Multiple effect


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}
172  DF  .~.~.~.~ Plural {1}
173  DF  .~.~.~.~.~ Series {1}
174.~.~.~.~.~.~ Multiple effect


DEFINITION

Classification: 202/174

The vapor from one still is carried through the distilland of another in heat-interchange relation, but not in direct contact.

SEE OR SEARCH CLASS

159, Concentrating Evaporators,

17.1+,.

201, Distillation: Processes Thermolytic,

14+, for a process directed to using a conversion product as an indirect source of heat to heat the carbonaceous material.

203, Distillation: Processes, Separatory,

25+, for a process in which the distillation zone is indirectly heated by recovered waste heat.