Patent ID: 9034447
Filing Date: 2015-05-19
Classification: B01D,B01J,Y10T

Abstract:
1. An ion exchange stationary phase formed by a method comprising: (a) reacting at least a first polyfunctional compound comprising two or more amine-reactive functional groups with a primary amine, forming a first polymer layer with a population of reactive tertiary amines; (b) reacting at least a portion of said population of reactive tertiary amines with a polyfunctional compound comprising two or more amine-reactive functional groups, forming a second polymer layer with pendant amine-reactive functional groups, and a population of quaternary amines; and (c) reacting said second polymer layer with an amine which is a member selected from tetramethylethylenediamine, tetramethyldiaminopropane, tetramethyldiaminobutane, iminobisdimethylpropylamine, and 1,3-bis(dimethylamino)-2-propanol.