Purification of poly vinyl chloride comprising a heavy metal compound, comprises adding polar organic solvent solution miscible with water, adding an aqueous solution comprising a reactant and adding water, stirring and precipitating

摘要

Purification of PVC comprising a heavy metal compound (I), comprises: placing PVC in a polar organic solvent solution (II) miscible with water; adding an aqueous solution comprising a reactant (Ia) (which is a base reacting with (I) or a dispersing agent stabilizing (I)) and adding water to form a biphasic medium (III) (where (II) is the continuous phase); stirring (III) for reacting (Ia) with (I); and precipitating PVC from (III).