System for liquid extraction, and methods

Details System for liquid extraction, and methods System for liquid extraction, and methods

2003-12-19

2010-12-28

Drodge, Joseph W (Department: 1797)

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

C044S302000, C134S010000, C210S639000, C210S770000, C210S774000, C210S806000, C034S340000, C034S342000, C435S132000, C435S161000

Reexamination Certificate

active

07857975

ABSTRACT:
A process for removing water from solid material (10) using liquid-solid extraction and liquid-liquid extraction in an extraction system (100). Multiple solvents are used sequentially to replace the water with a first solvent, then replacing that solvent with a second solvent, etc., then eventually removing the last solvent from the solid materials. The solvents have progressively lower heats of vaporization, enthalphy of vaporization, boiling point or related property, so as to conserve use of thermal energy.

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