US PATENT SUBCLASS 585 / 816
.~.~ With addition of extraneous material

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

800  DF  PURIFICATION, SEPARATION, OR RECOVERY {7}
812  DF  .~ By cooling of liquid to obtain solid, e.g., crystallization, etc. {4}
816.~.~ With addition of extraneous material {1}
817  DF  .~.~.~> Before crystal formation

DEFINITION

Classification: 585/816

With addition of extraneous material:

(under subclass 812) Subject matter in which a material from

an outside source is added to the hydrocarbon to be recovered to perfect the solidification procedure, e.g., by washing the resulting solids, etc.

SEE OR SEARCH THIS CLASS, SUBCLASS:

802+, for a process where crystallization and agent addition are performed serially upon a starting mixture, the agent being added for a purpose other than perfection of the crystallization procedure.

815, for a process where the added material is a solvent.