| 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
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