US PATENT SUBCLASS 568 / 749
.~.~.~.~.~ Purification or recovery


Current as of: June, 1999
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568 /   HD   ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES

*  DD  ORGANIC COMPOUNDS (Class 532, Subclass 1) {4}
300  DF  .~ OXYGEN CONTAINING (E.G., PERCHLORYLBENZENE, ETC.) {11}
700  DF  .~.~ Hydroxy containing (H of -OH may be replaced by a Group IA or IIA light metal) {10}
715  DF  .~.~.~ Benzene ring containing {8}
716  DF  .~.~.~.~ Phenols (H of -OH may be replaced by a Group IA or IIA light metal) {14}
749.~.~.~.~.~ Purification or recovery {10}
750  DF  .~.~.~.~.~.~> From mixture of phenols {1}
753  DF  .~.~.~.~.~.~> Of polyhydroxy phenol
754  DF  .~.~.~.~.~.~> Of phenol prepared by cleavage of hydroperoxide or other peroxide
755  DF  .~.~.~.~.~.~> Of halogen containing phenol
756  DF  .~.~.~.~.~.~> Of phenol having acyclic polycarbon hydrocarbyl group bonded directly to the benzene ring
757  DF  .~.~.~.~.~.~> Nitrogen or phosphorus containing compound utilized
758  DF  .~.~.~.~.~.~> Sorbent material utilized
759  DF  .~.~.~.~.~.~> From substance which includes sulfur or a sulfur containing compound
760  DF  .~.~.~.~.~.~> From ammoniacal liquor
761  DF  .~.~.~.~.~.~> From oil or tar derived from fossil fuel or wood {1}


DEFINITION

Classification: 568/749

Purification or recovery:

(under subclass 716) Processes which include separating the phenol from impurities or from the reaction mixture.