| abstract |
A process for separating, or enriching, in non-functional,nmonofunctional and bifunctional species the perfluoropolyoxyalkylenesnof formula (I): Z-O-Rf-Y wheren Rf = a perfluoropolyoxyalkylene chain comprising one or morenmonomeric units of formulan n nCFXO (X = F, CF 3 ), and optionally also unitsn(-CF 2 CF 2 O-); Z, Y, like or different from each other, are non-functionalngroups or functional groups -OH, with at least Z or Y innpart of such perfluoropolyoxyalkylenes being or containingnan -OH group, nwhich consists in subjecting said perfluoropolyoxyalkylenes toncolumn chromatography using, as eluents, non-polar fluorinatednsolvents, either alone or in admixture with polar solvents. |