Patent ID: 9738770
Date: 2017-08-22
CPC Classifications: B01F,B29B,B29C,B29K,C08J

Claim:
1. A process for removing volatile compounds from a polymer-containing medium which contains at least one polymer and at least one volatile compound, the process comprising: a) introducing the polymer-containing medium into a devolatilisation apparatus comprising: wherein the treatment elements comprise screw elements having a pitch t, and the screw elements are configured so that each of the following three conditions are met: b) operating the devolatilisation apparatus to remove volatile compounds from the polymer-containing medium through the devolatilisation openings of the devolatilisation zones to deplete the polymer-containing medium of volatile compounds and isolate polymer as product P from the polymer-containing medium on discharge from the devolatilisation apparatus, wherein the product P has a lower proportion of volatile compounds than the polymer-containing medium introduced into the devolatilisation apparatus.