Polyester manufacturing apparatus and method

A technology for a manufacturing device and a manufacturing method, applied to a polyester manufacturing device and the field thereof, can solve the problems of reduced production efficiency, long distance, thermal stress damage, etc., and achieve the effects of improving production efficiency, high heating temperature, and reducing output

CN101348564BInactive Publication Date: 2012-02-01HITACHI LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2012-02-01
Estimated Expiration
Not applicable · inactive patent

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Abstract

The present invention provides a manufacturing apparatus of polyester and a method for manufacturing polybutylene terephthalate, wherein a first processor of preparing an oligomer is improved in efficiency. The apparatus for manufacturing polybutylene terephthalate in the present invention comprises, at least, a first processor 1 including a vertical cylindrical esterification processor 10, a lower header tube constituted by a plurality of unit lower header tubes 111a-d, an upper header tube constituted by a plurality of unit upper header tubes 113a-d, heat transfer tubes 112a-d that are made of a plurality of communicating tubes connecting the unit lower header tubes 111a-d and the unit upper header tubes 113a-d, which are vertically facing each other, so as to enable a vapor phase or liquid phase heat medium to be communicable therethrough, and an agitation blade 120, characterized in that the respective unit lower header tubes 111a-d and the respective unit upper header tubes 113a-d are formed with a heat medium outflow and inflow unit.
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Description

technical field

[0001] The present invention relates to polybutylene terephthalate, polyethylene terephthalate, polytrimethylene terephthalate, polybutylene succinate, polyethylene succinate, etc. A continuous production method and apparatus for ester-based polymers. Background technique

[0002] These polyesters are synthesized by using dicarboxylic acids and diols as raw materials, adding a catalyst to these mixtures, and then passing through an esterification step and a polymerization step. In the esterification process, the carboxyl groups of the two dicarboxylic acids undergo esterification reactions with diols to form monomers, and the monomers undergo polycondensation reactions to form oligomers with an average degree of polymerization of about 1-10. As one of the polyester-based polymers, a method for producing polybutylene terephthalate (hereinafter referred to as PBT) and an apparatus thereof are known in JP-A-62-195017 (Patent Document 1), JP-A The device disclo...

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Embodiment Construction

[0029] Embodiments of the production apparatus and method of the polyester-based polymer of the present invention will be described in more detail.

[0030] The present invention relates to a continuous production device for polyester-based polymers, wherein the first reactor has the following characteristics: the liquid to be treated containing dicarboxylic acids and glycols is stirred and heated by the heat of the gas phase or liquid phase heat medium. By heating, the liquid to be treated undergoes an esterification reaction to produce an oligomer. In the continuous production apparatus of polyester-based polymers of the present invention, in addition to the first reactor, a second reactor for polycondensing oligomers from the first reactor to produce polymers with a low degree of polymerization may be further provided. A second reactor; a third reactor for further polycondensing the low-polymerization polymer from the second reactor to produce a polymer with a high degree o...