Patent ID: 7057010

Claim:
A continuous process for the drying of polymers containing N or amino, ammonium or spirobicyclic ammonium groups, comprising cationic N-containing groups, and suitable counterions, which comprises continuously drying gelled and washed, moist polymers obtained by polymerization, crosslinkage and optionally alkylation, by injecting a gaseous medium under normal pressure or overpressure into a fluidized bed dryer, whereby polymer gel, which can have up to approximately 90% of bound water, is introduced continuously into the fluidized bed dryer, whereupon owing to the gaseous medium injected into said fluidized bed, moist polymer gel is loosened, then the formation of a constant fluidized bed occurs and finally sufficient dried polymer gel, which has a water content of 2 to 5%, is removed continuously from the fluidized bed dryer such that a constant amount of fluidized bed remains in the dryer.