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A kind of preparation method of high softening point pitch for producing general-purpose pitch carbon fiber with coal tar pitch

A technology of high softening point asphalt and coal tar pitch, which is applied in the processing of tar pitch/petroleum pitch/natural pitch, processing tar pitch/petroleum pitch/natural pitch by distillation, processing tar pitch/petroleum pitch/natural pitch by chemical methods, etc. Direction, can solve the problems of low yield of pitch with high softening point, easy coking of oxidation device, etc., achieve good spinnability, simple operation, and reduce anisotropy

Active Publication Date: 2016-08-17
ZHANJIANG JUXIN NEW ENERGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method of this patent is prone to mesophase in the thermal condensation polymerization process, and the yield of high softening point asphalt prepared by this method is low, and the oxidation device is easy to coke in the industrial production process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Coal tar is first dehydrated in a dehydration tower to remove water and light oil, and then circulated into a super centrifuge through a circulating pump to centrifuge to separate mechanical impurities and quinoline insolubles to obtain net tar. The net tar is circulated into the distillation tower through the circulation pump, and the distillation is carried out under the vacuum negative pressure of 0.01-0.1MPa and the initial distillation temperature of 150°C. During the distillation process, the temperature is continuously raised at a rate of 4°C / min. 360°C, when there is no obvious distillate output in the distiller, stop the distillation to obtain coal tar pitch, filter the coal tar pitch with a stainless steel filter with a filtration precision of 10 μm, and continue to filter out quinoline insolubles to obtain low quinoline purified coal tar pitch. Preheat the purified coal tar pitch to 100°C and send it into the melting tank, and heat it to 200°C under the condit...

Embodiment 2

[0048] Coal tar is first dehydrated in a dehydration tower to remove water and light oil, and then circulated into a super centrifuge through a circulating pump to centrifuge to separate mechanical impurities and quinoline insolubles to obtain net tar. The net tar is circulated into the distillation tower through the circulation pump, and the distillation is carried out at a vacuum negative pressure of 0.01-0.1MPa and an initial distillation temperature of 180°C. During the distillation process, the temperature is continuously raised at a rate of 2°C / min. When the distillation temperature rises to 380 ℃, when there is no obvious distillate output in the distiller, stop the distillation to obtain coal tar pitch, filter the coal tar pitch with a stainless steel filter with a filtration precision of 15 μm, and continue to filter out quinoline insolubles to obtain low quinoline purified coal tar pitch. Preheat the purified coal tar pitch to 120°C and send it into the melting tank, ...

Embodiment 3

[0050] Coal tar is first dehydrated in a dehydration tower to remove water and light oil, and then circulated into a super centrifuge through a circulating pump to centrifuge to separate mechanical impurities and quinoline insolubles to obtain net tar. The net tar is circulated into the distillation tower through the circulation pump, and the distillation is carried out at a vacuum negative pressure of 0.01-0.1MPa and an initial distillation temperature of 140°C. During the distillation process, the temperature is continuously raised at a rate of 4°C / min. 320°C, when there is no obvious distillate output in the distiller, stop the distillation to obtain coal tar pitch, filter the coal tar pitch with a stainless steel filter with a filtration precision of 20 μm, and continue to filter out quinoline insolubles to obtain low quinoline purified coal tar pitch. Preheat the purified coal tar pitch to 100°C and send it into the melting tank, and heat it to 200°C under the condition of...

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Abstract

The invention relates to a method for preparing an isotropic high-softening-point asphalt, the isotropic high-softening-point asphalt prepared by the method, application of the isotropic high-softening-point asphalt to the preparation of carbon fiber and a method for preparing carbon fiber by using the isotropic high-softening-point asphalt. The preparation process is a continuous production process, has wide raw material sources, good controllability, easiness for operation and no environmental pollution, and is suitable for industrialized production.

Description

technical field [0001] The present invention relates to a method for preparing isotropic high softening point pitch, the isotropic high softening point pitch prepared by the method, the use of the isotropic high softening point pitch in the preparation of carbon fibers and the use of each A method for preparing carbon fibers from isotropic high softening point pitch. Background technique [0002] Research on pitch-based carbon fibers began in the 1960s. Since Sugiro Otani of Japan invented the manufacturing process of pitch-based carbon fiber, the research on pitch-based carbon fiber has developed rapidly abroad. With the development of my country's economy, the application of carbon fiber has been diversified in recent years, and its application fields have been continuously expanded, and certain research results have been obtained, but the production capacity has not yet been formed. The raw materials of pitch-based carbon fibers are relatively extensive, and by-products...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10C3/04C10C3/00C10C3/06D01F9/15
Inventor 吴其修刘明东李佳坤郭庆
Owner ZHANJIANG JUXIN NEW ENERGY
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