Method for removal of residual solvent from particulate crumb made by solution polymerization

摘要

A method for removing residual solvent dissolved in non-sticky crumb particles produced by solution polymerization that have been treated substantially to remove solvent from the polymer surface. Particles are transferred into a closed storage zone under inert atmosphere conditions and are maintained for a period of time sufficient to allow diffusion of solvent from the particles as free solvent. Inert gas is then passed through the storage zone to remove the free solvent. The processes of allowing diffusion followed by purging of the free solvent is repeated as necessary.