US PATENT SUBCLASS 585 / 815
.~.~ With dissolving or plural serial crystallizations


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}
815.~.~ With dissolving or plural serial crystallizations


DEFINITION

Classification: 585/815

With dissolving or plural serial crystallizations:

(under subclass 812) Subject matter wherein the starting mixture or a solid produced in the process is dissolved in a liquid or in which a component of a liquid mixture is chilled to form a solid, the solid is liquefied and the resulting liquid is again chilled to form a solid component.

SEE OR SEARCH THIS CLASS, SUBCLASS:

814, for a process in which the second crystallization is applied to the mother liquor obtained from the first crystallization.