Patent ID: 7144981

Claim:
A process for concentrating polymers by evaporation comprising: (i) obtaining a mixture containing a polymer and volatile component, the volatile components being present in the mixture at an amount less than 20 wt. % relative to the weight of the mixture, and (ii) introducing the mixture under pressure and through a plurality of nozzles arranged next to one another in a single plane into a degassing container to form an extrudate, wherein the volatile component contains at least one member selected from the group consisting of residual monomers, oligomers and solvents, and wherein the throughput of the mixture per nozzle is 0.3 to 2 kg/h, the vapor pressure of the volatile component of the extrudate is more than 2.5 bar, and the absolute pressure in the degassing container is 50 to 5000 Pa.