US PATENT SUBCLASS 208 / 353
.~.~.~ With heat recovery by indirect heat exchange

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}
353.~.~.~ With heat recovery by indirect heat exchange

DEFINITION

Classification: 208/353

(under subclass 350) Processes wherein one component being distilled is heated by indirect contact with the same or another component of the process.

(1) Note. In the processes classified herein, the heat exchange is usually between the hot residue and the incoming distilland.

SEE OR SEARCH THIS CLASS, SUBCLASS:

343, for processes of recovering mineral oil from gases including heat exchange between lean and rich absorbents.

365, for heat exchange in nonrectification distillation processes.

SEE OR SEARCH CLASS

196, Mineral Oils: Apparatus, 134, for apparatus for distilling mineral oil having means to recover heat from the vapor or residuum.

203, Distillation: Processes, Separatory,

21+, for a distillation process in which material being distilled is heated by indirect contact with itself or some other component in the process.