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A kind of preparation method and production equipment of acrylonitrile-based carbon fiber spinning solution

A technology of acrylonitrile-based carbon fiber and production equipment, which is applied in the direction of fiber chemical characteristics, textiles and papermaking, etc., to achieve continuous industrial production, improve uniformity, and solve the effects of radial differences

Active Publication Date: 2012-02-08
KINGFA SCI & TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for preparing acrylonitrile-based carbon fiber spinning solution, focusing on solving the problem of uniformity of material reaction and realizing the purpose of continuous production

Method used

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  • A kind of preparation method and production equipment of acrylonitrile-based carbon fiber spinning solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1: Weigh 2000g dimethyl sulfoxide and pour it into the feed tank, weigh 646.8g acrylonitrile, 3.3g azobisisobutyronitrile, and 6.6g itaconic acid, pour them into the feed tank successively, and stir After the dissolution is complete, the solution and the air in the tank are removed by bubbling argon for 20 minutes. Argon gas was passed through the tubular reactor for 20 minutes to remove air from the pipeline, while hot water at 50°C was passed through the jacket. Add a feeding tank to the middle of the tubular reactor, pour 340 g of dimethyl sulfoxide and 6.6 g of itaconic acid into it, stir to dissolve it completely and ventilate it with argon. Use a metering pump to transport the polymerization stock solution into the pipeline so that the flow rate is 0.5cm / s. After the feeding is completed, open the loop valve to circulate the material in the pipeline. After the temperature of the material rises to the reaction temperature, the metering pump in the middl...

Embodiment 2

[0022] Example 2: Weigh 2100g of dimethyl sulfoxide and pour it into the feed tank, weigh 582g of acrylonitrile, 4.8g of azobisisobutyronitrile, 6g of itaconic acid and 6g of acrylamide, and pour them into the feed tank in turn After stirring and dissolving completely, blow argon for 20 minutes to remove the solution and the air in the tank. Argon gas was passed through the tubular reactor for 20 minutes to remove air from the pipeline, while hot water at 55°C was passed through the jacket. Add a feeding tank to the middle of the tubular reactor, pour 300g of dimethyl sulfoxide, 3g of itaconic acid and 3g of methyl acrylate, stir to make them completely dissolve and ventilate with argon. Use a metering pump to transport the polymerization stock solution into the pipeline so that the flow rate is 0.4cm / s. After the feeding is completed, open the loop valve to circulate the material in the pipeline. After the material temperature rises to the reaction temperature, the central m...

Embodiment 3

[0023] Example 3: Weigh 2100g of dimethyl sulfoxide and pour it into the feed tank, weigh 640.2g of acrylonitrile, 4.62g of azobisisobutyronitrile, 1.76g of itaconic acid and 3.52g of acrylamide, and pour them into the In the material tank, after stirring and dissolving completely, blow argon for 20 minutes to remove the solution and the air in the tank. Argon gas was passed through the tubular reactor for 20 minutes to remove air from the pipeline, while hot water at 50°C was passed through the jacket. Add a feeding tank to the middle of the tubular reactor, pour 240g of dimethyl sulfoxide, 2.64g of itaconic acid and 5.28g of acrylamide, stir to dissolve them completely, and ventilate with argon. Use a metering pump to transport the polymerization stock solution into the pipeline so that the flow rate is 0.4cm / s. After the feeding is completed, open the loop valve to circulate the material in the pipeline. After the temperature of the material rises to the reaction temperatu...

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Abstract

The invention discloses a method for preparing an acrylonitrile-based carbon fiber spinning solution and production equipment thereof. The preparation method is to carry out the polymerization reaction in a tubular reactor. In the tubular reactor, a turbulence plate or an overpass plate is arranged in the tube cavity of the tube reactor, and a device for controlling the temperature of the tube cavity is arranged on the outer wall of the tube cavity. The preparation method of the present invention adopts a tubular reactor. Since the tube cavity is equipped with components such as turbulent flow plates or interchange plates, it can well make the central and peripheral materials generate cross flow, effectively solve the radial difference of the materials in the tube, and improve fluid transportation. Quality and provide heat transfer, mass transfer and improve chemical reaction efficiency with relatively low flow resistance, thereby improving the uniformity of polymers and enabling continuous industrial production.

Description

technical field [0001] The invention relates to the preparation technology of acrylonitrile-based carbon fiber spinning solution. Background technique [0002] Carbon fiber is a high-tech product. It is an indispensable structural material and ablation-resistant material in high-tech fields such as aerospace and aviation. It is also a new type of material for the upgrading of civil industries. Its application range has expanded to various fields of human life. Polyacrylonitrile fibers have become one of the most widely used precursors for the preparation of high-quality carbon fibers. Facts have shown that the performance of carbon fiber depends to a large extent on the performance of carbon fiber precursors, and the quality of spinning dope is the premise and basis for preparing high-quality precursors. Factors affecting the quality of spinning dope are not only related to the process formula, but also have a lot to do with the polymerization equipment, because different r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F9/22C08F220/44C08F2/01
Inventor 代惊奇黄险波宋威辛伟黄有平马雷
Owner KINGFA SCI & TECH CO LTD
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