US PATENT SUBCLASS 208 / 364
.~.~ Plural stages of vaporization

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

308  DF  FRACTIONATION {5}
347  DF  .~ Distillation {12}
364.~.~ Plural stages of vaporization {1}
365  DF  .~.~.~> With heat recovery by indirect heat exchange

DEFINITION

Classification: 208/364

(under subclass 347) Processes wherein the vaporization is carried out in a plurality of separate and distinct zones.

SEE OR SEARCH THIS CLASS, SUBCLASS:

354+, for processes including a plurality of vaporization zones, at least one of which is a rectification zone.