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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 to achieve the effects of saving cost, ensuring color and quality, and improving efficiency

Inactive Publication Date: 2013-09-04
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

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Comparison scheme
Effect test

Embodiment Construction

[0016] The preparation device of polybutylene terephthalate of the present invention will be further described in detail by specific examples below.

[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 a pelletizing and packaging equipment arranged in sequence, such as figure 2 As shown, the feeding device includes a machine barrel 1, and one end of the machine barrel 1 is provided with a feed hopper 2, the bottom of the feed hopper 2 is connected with the machine barrel 1, and the top of the feed hopper 2 is an inlet for PET bottle flakes. The feed port 3, the side of the feed 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 arranged in the barrel, and a motor 7 for driving the screw is arranged outside the barrel 1 , the barrel wall of the machine barrel 1 is...

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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, English name polybutylene terephthalate (referred to as PBT), belongs to the polyester series, which is composed of 1.4-pbt butanediol (1.4-Butylene glycol) and terephthalic acid (PTA) or terephthalic acid It is a translucent to opaque, milky white translucent to opaque, crystalline thermoplastic polyester resin formed by polycondensation of formate (DMT) and produced through a kneading process. Together with PET, it is collectively referred to as thermoplastic polyester, or saturated polyester. At present, there is no mature equipment for preparing PBT, especially there is no mature equipment for directly preparing PBT from PET bottle flakes. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a preparation device capable of directly preparing PBT polybutylen...

Claims

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Application Information

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Patent Type & Authority Applications(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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