A method for drying a material such as a polymer hydrogel which passes
through a cohesive phase as it dries is disclosed. The method comprises
agitating a composition while removing liquid until the solids content of
the composition reaches a level at which the composition enters a
cohesive phase, halting agitation, removing liquid from the composition
in the absence of agitation, and resuming agitation. Practice of the
present invention can eliminate the problems associated with adhesion of
a material to itself and to process equipment during the cohesive phase.