US PATENT SUBCLASS 203 / 93
.~.~ And returning product of distillation step to distillation zone

Current as of: June, 1999
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203 /   HD   DISTILLATION: PROCESSES, SEPARATORY

91  DF  VAPORIZATION ZONE UNDER POSITIVE PRESSURE OR VACUUM {2}
92  DF  .~ Including the addition of water or steam {1}
93.~.~ And returning product of distillation step to distillation zone

DEFINITION

Classification: 203/93

(under subclass 92) Processes directed to returning a product to the distillation zone.

SEE OR SEARCH CLASS

196, Mineral Oils: Apparatus,

99, for mineral oil distilling apparatus including the combination of vaporizing and condensing means with means for

returning a part or all of the condensate to the vaporizer.