method and device for removing at least a portion of the volatile substances from a mixture of a polymer and the volatile substances

摘要

A method and apparatus for removing volatile material from an elastomer by releasing a pressurized fluid mixture of the elastomer and volatile material into an elongated conduit. Some of the volatile material flashes into vapor and the remaining mixture forms discrete crumbs. The vapor and crumbs exit the conduit into an enclosure maintained at a lower pressure, and the crumbs fall into crumb-collecting means such as a drum drier or a screw conveyor. The crumbs are removed from the enclosure by vapor-tight means such as a sealed screw conveyor or extruder. Vapor is removed at the top of the enclosure, and can be condensed and recycled.