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Method and device for removing volatile components from polymer and application of method and device

A polymer and volatile technology, applied in the field of polymer post-treatment, can solve the problems of difficult removal of additives and low volatile content, and achieve the effects of easy operation, simple process flow, stable quality and performance

Pending Publication Date: 2022-05-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the problem that additives such as oligomers and high-boiling point hydrocarbons are difficult to remove in the polymer when there is a polymer to remove volatile components in the prior art, and to provide a polymer that removes volatile components. The method of the component and its device and application, the polymer is processed by this method, the volatile matter content in the obtained product is low, and the recycled circulating fluid avoids the circulation of oligomers and certain high-boiling organic compounds after purification Aggregation in liquid ensures stable product quality and performance

Method used

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  • Method and device for removing volatile components from polymer and application of method and device
  • Method and device for removing volatile components from polymer and application of method and device
  • Method and device for removing volatile components from polymer and application of method and device

Examples

Experimental program
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Effect test

Embodiment 1

[0102] In this example, the use shown in figure 1 The device in , used styrene as a monomer to prepare polystyrene (GPPS), and diluted the reaction system with ethylbenzene as a solvent.

[0103] The polystyrene melt obtained by the polymerization process, the volatile component of which is 12.3 wt %, is heated to 235 ° C by the first heat exchanger E-1, and then falls into the first flash tank with an absolute pressure of 5.6 kPa In DV-1, the diameter of the inner wall of the heat exchanger tubes is 20 mm, and the volatile content in the first polymer melt obtained after the first-stage devolatilization reaches 0.15 wt%. Before the melt enters the second flash tank DV-2, inject 2wt% deionized water through the mixer X-1 and mix it with the melt uniformly, and then heat it to 240 ℃ by the second heat exchanger E-2, and inject it into the material distributor X-32, the diameter of the distributor nozzle is 6mm, and the absolute pressure of the second flash tank is 0.3kPa.

[...

Embodiment 2

[0107] The treatment was carried out in the same manner as in Example 1, except that deionized water was not injected, and other conditions were the same.

Embodiment 3

[0109] The treatment was carried out in the same manner as in Example 1, except that 8wt% polybutadiene rubber was added to the polymerization raw material to prepare high impact strength polystyrene (HIPS), and other conditions were the same.

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Abstract

The invention relates to the field of polymer post-treatment, and discloses a method and device for removing volatile components from a polymer and application of the method and device. The method comprises the following steps that a polymer melt is conveyed to a first heat exchanger to be subjected to primary heating treatment and then enters a first flash evaporation tank to be subjected to primary devolatilization, and a first flash evaporation gas phase and a first polymer melt are obtained; the first polymer melt is conveyed to a second heat exchanger to be subjected to secondary heating treatment and then enters a second flash tank to be subjected to secondary devolatilization, and a second flash vapor phase is obtained; the second flash evaporation gas phase is conveyed into a first condenser to be cooled and then conveyed into a layering tank to be subjected to oil-water layering, and an oil phase is obtained; and conveying the first flash gas phase and the oil phase to a heavy component removal tower for three-stage devolatilization to obtain a light component and a heavy component. When the polymer is treated by the method, the content of volatile matters in the product is low, the aggregation of low polymers and high-boiling-point organic compounds in circulating liquid is avoided, and the quality and performance stability of the product are ensured.

Description

technical field [0001] The invention relates to the field of polymer post-treatment, and in particular, discloses a method for removing volatile components from a polymer, a device and an application thereof. Background technique [0002] In the polymer industry, aromatic olefin monomers are continuously prepared by bulk polymerization in liquid phase monomers, and the polymer melt is fed to a devolatilization unit where unwanted compounds such as Unreacted monomers, solvents, dimers and trimers can be removed from the polymer. For example, volatile components can be removed by vacuum distillation, thermal flash evaporation, stripping, etc., or a combination of several. The gas discharged from the devolatilization device is condensed and recovered for reuse. [0003] US5540813A introduces a method for removing volatiles from aromatic olefin compounds. The polymer solution is heated to above 230°C through a heat exchanger, and then removed through a two-stage vacuum devolat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F6/10C08F112/08C08F279/02C08F212/08C08F220/14C08F2/06
CPCC08F6/10C08F112/08C08F279/02C08F212/08C08F2/06C08F220/14C08L25/06C08L51/04C08L25/14
Inventor 斯维张晓尘宋文波
Owner CHINA PETROLEUM & CHEM CORP
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