US PATENT SUBCLASS 202 / 154
.~.~.~.~ Plural columns

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}
153  DF  .~.~.~ Still and column {2}
154.~.~.~.~ Plural columns

DEFINITION

Classification: 202/154

Systems embracing a plurality of fractionating columns with a

single still or a plurality of stills.

SEE OR SEARCH CLASS

203, Distillation: Processes, Separatory,

71+, for a distillation process including a plurality of vaporization and condensation steps.