| 摘要 |
PROBLEM TO BE SOLVED: To provide an apparatus for producing polyesters that aims elimination of structural weakness of a second reactor producing polymers. SOLUTION: The apparatus for continuously producing polyesters includes a first reactor 10 for producing oligomers, a second reactor 20 for producing polymers with low degrees of polymerization, and a third reactor 30 for producing polymers with high degrees of polymerization by further performing condensation polymerization. The second reactor 20 is composed of a plurality of reaction chambers 201 and has structure in which the reaction chambers 201 are connected to each other alternately in the upper part thereof and the lower part thereof. In the apparatus, a heating device 220 is installed only inside the reaction chamber into which a reaction liquid flows from the lower part and exits from the upper part. Therefore, stirring blades, the structurally weak parts of the reactor, are eliminated while securing plug flow performance preventing backflow between reaction chambers, along with complete mixing inside the reaction chamber 201. COPYRIGHT: (C)2011,JPO&INPIT
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