FIELD: organic chemistry. SUBSTANCE: polymer solution preliminary heated to 150-200 C is fed into 3- or 5 sectional extruder. The process is carried out under pressure being higher than pressure of solvent by its boiling at rate 100-300 r. p, m. Pressure in the first section of extruder is 600-800 mbar, pressure in its last section being 5-10 mbar. The process is followed by evaporation of solvent and by granulation of dry polymer. EFFECT: improves efficiency of the method. 1 dwg
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