Bayer Aktiengesellschaft

Hans-Peter Hoffmann

Uwe Hucks

Silke Kratschmer

Eike Schulz Van Endert

Klaus Schr&ouml;der

Thomas K&ouml;nig

A process for producing polycarbonate is disclosed. The process entails obtaining an oligocarbonate produced by transesterification of diaryl carbonate with dihydroxyaryl compound in the presence of catalysts and introducing the oliogocarbonate into a reactor that enables continuous formation of free films at a rate higher than 10. The reactor including a horizontal cylinder equipped with a heating jacket, at least one vapor outlet, a feed nozzle an outlet nozzle, a rotatable cylindrical basket having a cylindrical perforated wall and annular discs positioned at intervals around the periphery of said basket and along the length thereof, and means for rotating said basket, the interior of said basket including no central shaft, the diameter of the cylindrical basket corresponding to about &frac23; of the diameter of the horizontal cylinder, and said discs being formed of perforated sheet metal.

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Velten, Germany

Hans-Peter Hoffmann