US PATENT SUBCLASS 203 / 83
.~.~ Including the addition of water or steam

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

71  DF  PLURAL DISTILLATIONS PERFORMED ON SAME MATERIAL {5}
81  DF  .~ Distillation of initial distillate {2}
83.~.~ Including the addition of water or steam

DEFINITION

Classification: 203/83

(under subclass 81) Processes directed to adding water or steam to at least one distillation operation.

(1) Note. Water or steam is usually added to the distillation operation to change the relative volatility of the components of the material being distilled.