Water ethylene-glycol solutions purification by ionic exchange methods and micro filtration
The possibility of ionic exchange and micro filtration application for water ethylene-glycol mixture purification has been studied. Both specific resistance of ethylene-glycol of analytical grade and a volume of filtrate passed through a filter of mixed action (MAF) has been shown to satisfy to industrial requirements in comparison with ethylene-glycol of technical grade. The preliminary purification of the ethylene-glycol of technical grade from colored substances (before MAF) for obtaining heat carriers of high purity has been proposed to be accomplished with micro filtration.