Method and System for Producing Polyester

摘要

Provided are a polyester production apparatus and a method, which can rapidly exhaust water produced by the dehydration condensation reaction, from the reaction system.;The polyester production apparatus includes:
an esterification reactor producing polymer by the dehydration condensation reaction between 1,3-propanediol and dicarboxylic acid to volatilize a volatile component including eliminated water produced in said dehydration condensation reaction,a plurality of polymerization reactors increasing the polymerization degree by carrying out polycondensation reaction between polymers, and to volatilize the volatile component including the eliminated product generated by said polycondensation reaction,a wet-type condenser condensing said eliminated water and exhausting the condensed component and non-condensed component, anda decompression apparatus reducing a pressure in said esterification reactor.;Said volatile component's outlet of said esterification reactor is connected to the volatile component's inlet of said wet-type condenser, and said decompression apparatus is connected next to the non-condensed component's outlet of said wet-type condenser.

主权项

1. A polyester production apparatus comprising:
an esterfication reactor which produces polymer from 1,3-propanediol and a dicarboxylic acid by a dehydration condensation reaction, and volatilizes a volatile component including eliminated water produced by said dehydration condensation reaction, a plurality of polymerizing reactors which increase a polymerization degree by facilitating a polycondensation reaction between the polymers, and volatilizes the volatile component including the eliminated product produced by said polycondensation reaction, a wet-type condenser which condenses said eliminated water by contacting a coolant containing 1,3-propanediol thereto, and respectively exhausts the condensed component and non-condensed component, and a decompression apparatus which reduces a pressure in said esterification reactor, whereon an outlet of the volatile component included in said esterification reactor is connected to an inlet of the volatile component included in said wet-type condenser, and said decompression apparatus is connected to a poststage side of an outlet of the non-condensed component included in the wet-type condenser.