Extraction process

Details Extraction process Extraction process

1994-07-13

1997-05-13

Spear, Frank

Liquid purification or separation

Processes

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

210259, B01D 1104

Patent

active

056289065

ABSTRACT:
The invention relates to an extraction process which comprises adding a primary solvent to a first solution containing a solute dissolved in a native solvent. The primary solvent is added in an amount sufficient to form a single-phase mixture comprising said primary solvent, said native solvent and said solute. Thereafter a modifier is added to the single-phase solution. The modifier is miscible with either the primary solvent or the native solvent and serves to reduce the miscibility of the primary solvent with the native solvent so as to form a two-phase mixture. The two phases are allowed to separate into one phase rich in the native solvent and a second phase rich in the primary solvent and solute. Finally, the solute is separated from the solvent-rich phase. The process is particularly useful for separating products of fermentation from fermentation broths or other systems which are sensitive to high temperatures or which tend to form emulsions.

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