A process for removing an ionic impurity from an impure substantially non-aqueous liquid passes the impure non-aqueous liquid through at least one ion exchange compartment containing an ion exchange medium. The ion exchange compartment is separated from an anode compartment and a cathode compartment...http://www.google.fr/patents/US5254227?utm_source=gb-gplus-shareBrevet US5254227 - Process for removing catalyst impurities from polyols
Process for removing catalyst impurities from polyols
