Patent ID: 6572831
Filing Date: 2003-06-03
Classification: B01D,C02F,Y10S

Abstract:
A process of removing a first material from a mass of material comprising:(a) contacting the mass of material with a fluorinated hydrocarbon solvent so as to charge the fluorinated hydrocarbon solvent with the first material and thereby produce a charged solvent, said fluorinated hydrocarbon solvent being in a liquid state and comprising a C1-C3 fluorinated hydrocarbon which includes one or more carbon and hydrogen atoms and at least three fluorine atoms; and (b) separating the charged solvent from the remainder of the mass of material; wherein (i) the first material comprises a contaminant solvent which is not naturally occurring in said mass of material but is brought into contact with other components in said mass of material in an upstream process step; and (ii) the first material is not naturally occurring in said mass of material, said mass of material comprises a polymeric solid and said first material is removed from said polymeric solid.