US PATENT SUBCLASS 585 / 807
.~.~.~ Including steps of distillation and agent addition

Current as of: June, 1999
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585 /   HD   CHEMISTRY OF HYDROCARBON COMPOUNDS

800  DF  PURIFICATION, SEPARATION, OR RECOVERY {7}
802  DF  .~ By plural serial diverse separations {3}
804  DF  .~.~ To recover aromatic {3}
807.~.~.~ Including steps of distillation and agent addition {1}
808  DF  .~.~.~.~> Agent contains N, carbonyl, or dihydroxy moiety

DEFINITION

Classification: 585/807

Including steps of distillation and agent addition:

(under subclass 804) Subject matter in which the plural separations include distillation and the addition of an extraneous agent.

SEE OR SEARCH CLASS

203, Distillation: Processes, Separatory, for a process which includes distillation and previous addition of an agent which causes or assists in a chemical reaction designed to make the distillation effective or more effective, or a process which includes distillation and a subsequent "physical" separatory step, e.g., solvent extraction.