Asphalt-base carbon fiber prepared by coal directly liquefied residues and preparation method thereof

A pitch-based carbon fiber and coal direct liquefaction technology, which is applied in the fields of fiber chemical characteristics, textiles and papermaking, etc., to achieve the effect of low price and abundant raw material sources

Active Publication Date: 2009-12-02
CHNA ENERGY INVESTMENT CORP LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The main documents about the utilization of coal direct liquefaction residue are: CN 1827697A, CN1807715A, Fuel Processing Technology (2000, 62: 109-118), Coal Conversion (2001, 24 (1): 15-19), Combustion Science and Tech

Method used

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  • Asphalt-base carbon fiber prepared by coal directly liquefied residues and preparation method thereof
  • Asphalt-base carbon fiber prepared by coal directly liquefied residues and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0033] Example 1

[0034]Grind 10 kg of coal directly liquefied residue into powder with a particle size of 0.01-0.3 microns. The coal direct liquefaction residue powder is thoroughly mixed with 20 kg of tetrahydroquinoline to obtain a mixed solution. Put the mixed solution into an autoclave, replace the air in the autoclave with nitrogen, and then heat and pressurize while passing in hydrogen gas for hydrogenation; vacuum distillation removes most of the sulfur, oxygen, nitrogen, etc. contained in the original residue The elements are filtered under reduced pressure to remove the tetrahydroquinoline insoluble matter, and the tetrahydroquinoline solvent is recovered by vacuum distillation and recycled. The pitch raw material produced in the pitch preparation process is heated and melted and melt-spinned by a spinning machine. During the spinning process, the raw material viscosity is controlled to 10 Pa·S and the spinning temperature is 350° C. The raw yarn is obtained by melt spi...

Example Embodiment

[0035] Example 2

[0036] Grind 10 kg of coal directly liquefied residue into powder with a particle size of 0.01-0.3 microns. The coal direct liquefaction residue powder is thoroughly mixed with 30 kilograms of tetrahydroquinoline to obtain a mixed solution. Put the mixed solution into an autoclave, replace the air in the autoclave with nitrogen, and then heat and pressurize while passing in hydrogen gas for hydrogenation; vacuum distillation removes most of the sulfur, oxygen, nitrogen, etc. contained in the original residue The elements are filtered under reduced pressure to remove the tetrahydroquinoline insoluble matter, and the tetrahydroquinoline solvent is recovered by vacuum distillation and recycled. The pitch raw material produced in the pitch preparation process is heated and melted and melt-spinned by a spinning machine. During the spinning process, the raw material viscosity is controlled to 15 Pa·S, the spinning temperature is 380° C., and the raw yarn is obtained b...

Example Embodiment

[0037] Example 3

[0038] Grind 10 kg of coal directly liquefied residue into powder with a particle size of 0.01-0.3 microns. The coal direct liquefaction residue powder is thoroughly mixed with 40 kilograms of tetrahydroquinoline to obtain a mixed solution. Put the mixed solution into an autoclave, replace the air in the autoclave with nitrogen, and then heat and pressurize while passing in hydrogen gas for hydrogenation; vacuum distillation removes most of the sulfur, oxygen, nitrogen, etc. contained in the original residue The elements are filtered under reduced pressure to remove the tetrahydroquinoline insoluble matter, and the tetrahydroquinoline solvent is recovered by vacuum distillation and recycled. The pitch raw material produced in the pitch preparation process is heated and melted and melt-spinned by a spinning machine. During the spinning process, the raw material viscosity is controlled to 18 Pa·S, the spinning temperature is 400° C., and the raw yarn is obtained b...

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Abstract

The invention discloses a method for preparing asphalt-base carbon fiber by taking coal directly liquefied residues as a raw material. The method comprises the following steps that: mixed solution of coal directly liquefied residue powder and tetrahydroquinoline solvent is filled into a high pressure autoclave, and is heated to a temperature of between 150 and 400 DEG C after air in the autoclave is replaced by nitrogen; hydrogen is introduced into the autoclave while pressure is increased to 2 to 50MPa; most elements, such as sulfur, oxygen, nitrogen and the like, contained in original residues are removed through distilling under reduced pressure; removing tetrahydroquinoline insoluble substance through filtering under reduced pressure, reclaiming the tetrahydroquinoline solvent through distilling under reduced pressure, and recycling the tetrahydroquinoline solvent; and the obtained tetrahydroquinoline soluble substance can be produced into the asphalt-base carbon fiber through melt spinning, pre-oxidation, low temperature carbonization, high temperature carbonization, superficial treatment, post treatment and other processes.

Description

technical field [0001] The invention relates to a pitch-based carbon fiber and a preparation method thereof, in particular to a pitch-based carbon fiber prepared from the residue produced by direct liquefaction of coal as a raw material and a preparation method thereof. Background technique [0002] Energy is the foundation of national economic development, while oil is the lifeblood of national economic development. With the rapid development of my country's national economy, the demand for domestic petroleum and petrochemical products has been driven to a relatively strong growth, but domestic oil is far from meeting the demand, which has led to an increase in the country's oil imports. On the one hand, the country needs to consume a large amount of funds every year. On the other hand, due to the shortage of crude oil and the uncertainty of supply, it also seriously threatens the stable and rapid development of my country's national economy. The status quo of the energy st...

Claims

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Application Information

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IPC IPC(8): D01F9/15
Inventor 朱伟平岳国
Owner CHNA ENERGY INVESTMENT CORP LTD
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