Patent ID: 6487788
Filing Date: 2002-12-03
Classification: B01D,B01F,C08B,F26B

Abstract:
A continuous process for the drying and gel formation of solvent containing gel-forming polymer by flash cooling a suspension of the polymer comprising metering a solvent-containing polymer having a solids content of 1 to 65% by weight at a pressure of up to 6000 hPa, at a polymer temperature of 20 to 100Â° C. into an evaporation zone having a pressure of 0.1 to 8000 hPa, cooling the polymer to a temperature lower than 93Â° C., freeing the polymer of 2 to 5% by weight of solvent with mechanical stirring, mixing and conveying of the mixture to the lower end of the evaporation zone with formation of a dense gelled product layer, discharging the polymer by means of a mechanical discharge apparatus with or without further densification of the polymer, and drying the gelled polymer in a drying apparatus to a solvent content of not more than 5% by weight.