US PATENT SUBCLASS 202 / 146
.~.~.~.~.~.~.~ With regenerators

Current as of: June, 1999
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202 /   HD   DISTILLATION: APPARATUS

81  DF  APPARATUS {4}
82  DF  .~ Systems {6}
96  DF  .~.~ Thermolytic {5}
105  DF  .~.~.~ Retort {14}
133  DF  .~.~.~.~ Horizontal {6}
138  DF  .~.~.~.~.~ With flues {2}
145  DF  .~.~.~.~.~.~ Horizontal {1}
146.~.~.~.~.~.~.~ With regenerators

DEFINITION

Classification: 202/146

The air and/or gas for combustion is heated by the waste products of combustion by means of single-surface heaters.

SEE OR SEARCH CLASS

201, Distillation: Processes, Thermolytic,

13+, for a thermolytic distillation process including the step of heating the combustion gas or air by indirect heat exchange with the products of the carbonizing step.