| 摘要 |
PROBLEM TO BE SOLVED: To obtain a continuous production method for polyethylene terephthalate wherein the number of reactors necessary for reaction is made minimal and the power consumption for agitation necessary for reaction are minimized by providing a production method and apparatus whereby a high-quality polyester is efficiently produced by using three reactors. SOLUTION: The polyester production apparatus has three reactors: an esterification reactor, an initial polymerization reactor, and a final polymerization reactor. Both the esterification reactor and the initial polymerization reactor are not equipped with an external power source for agitation. The final polymerization reactor is of a horizontal single-shaft low-speed-rotating type. Such a necessary and minimum reactor constitution enables a high-quality polyester to be efficiently produced at a minimum energy cost. COPYRIGHT: (C)2004,JPO
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