US PATENT SUBCLASS 585 / 423
.~.~ With plural separation procedures

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

400  DF  AROMATIC COMPOUND SYNTHESIS {15}
422  DF  .~ By condensation of entire cyclic molecules or entire hydrocarbyl moieties thereof, e.g., polymerization, etc. {4}
423.~.~ With plural separation procedures

DEFINITION

Classification: 585/423

With plural separation procedures:

(under subclass 422) Subject matter wherein a material, usually the effluent from the condensation reaction or a component thereof, passes through at least two separation steps.

(1) Note. A mere nominal "recovery" or "separating" step is not sufficient to warrant placement of a patent herein.

(2) Note. Many patents contained herein recycled a separated component.

SEE OR SEARCH THIS CLASS, SUBCLASS:

424, for a process wherein the condensation effluent is subjected to another condensation reaction.

702+, 705 and 706, for paraffin syntheses in general which may or do involve specifically directed separation or purification procedures.

710, and 712, for alkylation procedures which produce a paraffin, involving specifically directed purification or separation procedures.