WERKWIJZE TER VERWIJDERING VAN IN ACRYLONITRIL EN ACRYLAMIDE AANWEZIGE ALDEHYDE-ONZUIVERHEDEN.

摘要

Aldehyde impurities, such as acrolein, in acrylonitrile and acrylamide formed therefrom are removed by contacting with a gel type weak base ion exchanger having primary and/or secondary amine functionality. Low quality acrylamide catalytic monomer can be upgraded to produce polymers of satisfactory commercial molecular weight for use as flocculants in water treating applications, as measured by standard viscosity, in contrast to such untreated monomers which result in polymers of limited usefulness. The preferred ion exchange is a weakly basic gel type polystyrene-polyamine type anion exchange resin having a styrene- divinylbenzene matrix and primary and/or secondary functional groups.