US PATENT SUBCLASS 208 / 358
.~.~.~ With liquid product recycle to rectification zone

Current as of: June, 1999
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208 /   HD   MINERAL OILS: PROCESSES AND PRODUCTS

308  DF  FRACTIONATION {5}
347  DF  .~ Distillation {12}
350  DF  .~.~ Rectification {7}
358.~.~.~ With liquid product recycle to rectification zone

DEFINITION

Classification: 208/358

(under subclass 350) Processes wherein condensate or residue is returned to the rectification zone after having been removed therefrom to assist in the vaporization process.

SEE OR SEARCH CLASS

203, Distillation: Processes, Separatory,

98, for a distillation process including the step of returning a condensate or a residue to the distillation zone and note "SEARCH THIS CLASS, SUBCLASS" and "SEARCH CLASS" thereunder.