Patent ID: 6123850
Filing Date: 2000-09-26
Classification: B01J,C07B

Abstract:
Process for purification of a virtually anhydrous organic liquid other than dimethyl sulphoxide alone, to decrease its content of alkali and alkaline-earth metal and metal cations, comprising placing the organic liquid to be purified in contact with at least one cation exchange resin in acidic or ammonium form and then separating from the resin the purified organic liquid, said resin or at least one of the resins being a sulphonic resin in --SO.sub.3 H or --SO.sub.3 NH.sub.4 form based on a polystyrene-divinylbenzene copolymer having a divinylbenzene content of from 50 to 60% by weight, without taking the sulphonic groups into account, the water content of the organic liquid being lower than or equal to 1% by weight.