US PATENT SUBCLASS 585 / 479
.~.~.~ Including a crystallization step

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

400  DF  AROMATIC COMPOUND SYNTHESIS {15}
477  DF  .~ By isomerization {2}
478  DF  .~.~ With plural separation steps {1}
479.~.~.~ Including a crystallization step

DEFINITION

Classification: 585/479

Including a crystallization step:

(under subclass 478) Subject matter wherein one or more of the plural separation steps involves chilling a mixture to solidify a component of the mixture.

SEE OR SEARCH THIS CLASS, SUBCLASS:

812+, for solidification processes, per se, specific to the separation or purification of hydrocarbons.

SEE OR SEARCH CLASS

62, Refrigeration,

532+, for fractional crystallization processes of general applicability.