N or the amino group, the mannered null N content basis or the amine basis, the ammonium basis or the spiro two cyclic ammonium basis which

摘要

PROBLEM TO BE SOLVED: To provide a simple method for properly drying polymer containing N or amino, ammonium or spirobicyclic ammonium group, wherein high product quality is guaranteed and, simultaneously, daily output is increased.;SOLUTION: The method comprises continuously drying the gelled and washed polymers obtained by polymerization, crosslinkage and optional alkylation, wherein polymers are dried by using a gaseous medium under normal pressure or overpressure in a fluidized bed.;COPYRIGHT: (C)2004,JPO&NCIPI