PLANT WITH REACTOR INTERNALS COATED WITH LOW SURFACE ENERGY MATERIALS AND PRODUCTION OF POLYESTER RESIN USING SAME

摘要

A process plant comprising melt polymerization reactor (1 ), pre-polymer particle former (2), preheater section (3) comprising preheater distribution plates (4) and plenum (5), nitrogen gas circulation lines (6) comprising nitrogen gas circulation loops (7), heater (8) and filter (9), conditioning vessel (10) and solid-state polymerization reactor (11 ) characterized in that side wall (12) of the preheater section (3), the preheater distribution plates (4), the plenum (5), the nitrogen gas circulation lines (6), the nitrogen gas circulation loops (7), the heater (8), the filter (9) and / or the conditioning vessel (10) are coated with a coating comprising compounds and / or metals exhibiting low surface energy to avoid deposit formation. A process for the production of polyester by solid-state polymerization using the above mentioned process plant comprising reactor internals coated with low surface energy materials is also disclosed. The use of nucleating agent in the above process to reduce the dust generation is also disclosed.