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Device for preparing polybutylene terephthalate

A technology of polybutylene terephthalate and preparation device is applied in the field of preparation device of polybutylene terephthalate, so as to improve work efficiency, increase heat exchange area and shorten the time required for esterification Effect

Inactive Publication Date: 2015-05-13
江苏宝田新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no mature equipment for preparing PBT, especially there is no mature equipment for directly preparing PBT from PET bottle flakes

Method used

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  • Device for preparing polybutylene terephthalate
  • Device for preparing polybutylene terephthalate
  • Device for preparing polybutylene terephthalate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] Hereinafter, the polybutylene terephthalate preparation device of the present invention will be further described in detail through specific examples.

[0017] Such as figure 1 As shown, the preparation device of polybutylene terephthalate includes a feeding device, an esterification reaction kettle, a pre-shrinking kettle, a final shrinking kettle and pelletizing and packaging equipment arranged in sequence, such as figure 2 As shown, the feeding device includes a barrel 1. One end of the barrel 1 is provided with a feeding hopper 2. The bottom of the feeding hopper 2 is connected with the barrel 1, and the upper part of the feeding hopper 2 is filled with PET bottle flakes. Material port 3, the side of the hopper 2 is provided with an alcohol feed pipe 4, the other end of the barrel 1 is a discharge port 5, a screw 6 is provided in the barrel, and a motor 7 for driving the screw is provided outside the barrel 1 The wall of the barrel 1 is provided with an electric heatin...

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Abstract

The invention relates to a device for preparing polybutylene terephthalate. The device comprises a feeding device, an esterification reaction kettle, a preshrinking kettle, a final shrinking kettle and granule packing equipment, which are sequentially arranged, wherein the feeding device adopts a screw extrusion manner; a screw is changed into a hollow structure; a cyclic heating medium is introduced into the screw; the esterification reaction kettle adopts a steam generator, instead of a coiler in the traditional esterification reaction kettle; an overflow groove is added to the preshrinking kettle; and the final shrinking kettle blows air into a tank body, then detects the air pressure inside the tank body by detecting the air pressure in a blowing process, and detects the liquid level condition inside the tank according to the air pressure. By improvement, PBT (polybutylece terephthalate) can be directly prepared from a PET (polyethylene glycol terephthalate) flake; and the device is simple in preparation process and high in efficiency.

Description

Technical field [0001] The invention relates to a preparation device of polybutylene terephthalate. Background technique [0002] Polybutylene terephthalate, the English name polybutylene terephthalate (abbreviated as PBT), belongs to the polyester series and is composed of 1.4-pbt butylene glycol (1.4-Butylene glycol) and terephthalic acid (PTA) or terephthalic acid A milky white translucent to opaque, crystalline thermoplastic polyester resin made by polycondensation of formate (DMT) and through a mixing process. Together with PET, they are collectively referred to as thermoplastic polyester, or saturated polyester. At present, there is no mature equipment for preparing PBT, especially no mature equipment for directly preparing PBT from PET bottle flakes. Summary of the invention [0003] The technical problem to be solved by the present invention is to provide a polybutylene terephthalate preparation device that can directly prepare PBT by using PET bottle flakes. [0004] In ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J19/20C08G63/183C08G63/82
Inventor 蒋云
Owner 江苏宝田新材料股份有限公司
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