US PATENT SUBCLASS 585 / 804
.~.~ To recover aromatic

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.~.~ To recover aromatic {3}
805  DF  .~.~.~> Xylene or ethylbenzene
806  DF  .~.~.~> Having unsaturated or one-C side-chain
807  DF  .~.~.~> Including steps of distillation and agent addition {1}

DEFINITION

Classification: 585/804

To recover aromatic:

(under subclass 802) Subject matter in which an aromatic hydrocarbon is purified or separated out from a mixture.