US PATENT SUBCLASS 203 / 22
.~ Utilizing recovered heat for heating feed

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

21  DF  AND RECOVERING HEAT BY INDIRECT HEAT EXCHANGE {3}
22.~ Utilizing recovered heat for heating feed {2}
23  DF  .~.~> Distillation residue as heat source
24  DF  .~.~> Compressed vapor as heat source

DEFINITION

Classification: 203/22

(under subclass 21) Processes in which the feed is heated by the recovered waste heat.

SEE OR SEARCH CLASS

34, Drying and Gas or Vapor Contact With Solids,

513, for a process of including the step of exchanging heat between the incoming and outgoing gases.

196, Mineral Oils: Apparatus,

134, for mineral oil vaporizing apparatus having means for preheating the oil by the heat of the vapor or residue.

201, Distillation: Processes, Thermolytic, 14+, for a thermolytic distillation process directed to using a conversion product as an indirect source of heat for heating the feed.

202, Distillation: Apparatus,

159, for a distillation system including a device for heating the feed with a product of the distillation step and subclasses 177+ for a still system including a device for preheating the feed with a product of the distillation step.