FIELD: chemistry.
SUBSTANCE: invention relates to a method of purifying resorbable polyester and an apparatus to this end. Purification of resorbable polyester involves dissolving polymer in a first solvent (12) and then bringing the polymer solution into close contact with a second solvent (41) under the action of high shearing forces in a turbulent shear field. The second solvent (41) is a nonsolvent for the resorbable polyester, infinitely miscible with the first solvent (12). The polymer suspension formed as a result of adding the second solvent (41) is then fed either into the revolving cylindrical sieve working member (71) of a drum sieve (70) operating with generation of a shearing force. The moist polymer mass is then removed from the sieve working member (71) of the drum sieve using one or more helically lying conveyor wheels and/or guide blades inside said revolving cylindrical sieve member and then dried.
EFFECT: invention enables to obtain resorbable polyesters with high quality and high cost effectiveness even on an industrial scale.
19 cl, 3 dwg
