US PATENT SUBCLASS 23 / 307
.~.~ With direct heating

Current as of: June, 1999
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23 /   HD   CHEMISTRY: PHYSICAL PROCESSES

293 R  DF  PHYSICAL PROCESSES {7}
306  DF  .~ Concentration of liquids in liquids {1}
307.~.~ With direct heating

DEFINITION

Classification: 23/307

(under subclass 304) Processes in which the liquid being concentrated is directly contacted with the concentrating medium (e.g., hot gases).

SEE OR SEARCH CLASS

203, Distillation: Processes, Separatory,

49, for convective distillation.