Method of preparing carbon fiber by using coal to directly liquefy residue-based asphalt vinyl material

A coal direct liquefaction and asphaltene-based technology, which is applied in the fields of fiber chemical characteristics, textiles and papermaking, can solve the problems of low added value, environmental pollution, waste of resources, etc., and achieve the effects of conventional equipment, environment-friendly, and resource utilization

Inactive Publication Date: 2012-10-17
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Coal direct liquefaction residues are currently mainly used for primary treatment methods such as combustion, coking to oil, gasification hydrogen production, and road asphalt modifiers, all of which have problems such as waste of resources, environmental pollution, and low efficiency to varying degrees, and the use of added value Low, so it is necessary to seek a high value-added utilization method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Weigh about 10.0105g of asphaltenes (with a particle size of about 100 mesh) obtained by extracting coal direct liquefaction residue with N-methylpyrrolidone in a porcelain boat, put it into a high-temperature tube furnace, seal it, and purge it with nitrogen. Raise the temperature to 380°C at a heating rate of 2.5°C / min, keep the temperature at 380°C for 10 hours, and then cool down naturally. During the process of heating up, constant temperature and cooling down, 60ml / min of nitrogen gas was introduced for protection. 6.1344g of solid product was prepared, namely the mesophase, the yield was about 61.28%, the H / C was about 0.57, the S content was about 0.36%, and the softening point was about 235°C. The prepared mesophase is used to spin a raw filament under the condition of heating at 275° C. through a melt spinning machine. The raw silk was pre-oxidized in an air atmosphere at 280°C, and then carbonized in a nitrogen atmosphere at 1000°C to prepare carbon fibers. ...

Embodiment 2

[0022] Weigh about 10.0617g of asphaltenes (with a particle size of about 100 mesh) obtained by extracting coal direct liquefaction residue with N-methylpyrrolidone in a porcelain boat, put it into a high-temperature tube furnace, seal it, and blow it with nitrogen. Raise the temperature to 390°C at a heating rate of 2.5°C / min, keep the temperature at 390°C for 10 hours, and then cool down naturally. During the process of heating up, constant temperature and cooling down, 50ml / min of nitrogen gas was introduced for protection. 5.3659g of solid product was prepared, namely the mesophase, the yield was about 53.33%, the H / C was about 0.52, the S content was about 0.08%, and the softening point was about 225-235°C. Use the prepared mesophase to spin a precursor under the condition of heating at 280° C. through a melt spinning machine. The raw silk was pre-oxidized in an air atmosphere at 280°C, and then carbonized in a nitrogen atmosphere at 1000°C to prepare carbon fibers. The...

Embodiment 3

[0024] Weigh about 10.0130g of asphaltenes (particle size about 100 mesh) obtained by extracting coal direct liquefaction residue with N-methylpyrrolidone, put it into the autoclave in the glove box, seal it and take it out. Raise the temperature to 400°C at a heating rate of 2°C / min, keep the temperature at 400°C for 8 hours, and then cool down naturally. 7.9012g of solid product was prepared, namely the mesophase, with a yield of about 78.91%, H / C of about 0.73, S content of about 0.42%, and a softening point of about 182°C.

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Abstract

The method of the present invention provides a Method of preparing a spinnable mesophase and carbon fiber by using coal to directly liquefy residue-based asphalt vinyl material. According to the invention, the residue-based asphalt vinyl material which is subjected to direct coal liquefaction as a raw material, and the method comprises the following steps: grinding the asphalt vinyl material, and then placing in a high temperature tube type furnace or a high pressure reaction kettle under the inert gas protection, and preparing under the temperature of 200-500 DEG C and the pressure of 0.1-10 MPa to obtain the spinnable mesophase, performing processes of melt spinning, preoxidation and carbonization treatment on the mesophase to prepare the carbon fiber. The invention has the advantages of simple preparation method, conventional equipment, cheap raw material, good product quality and environmental protection, and is a method for high-value utilization of coal resource. The prepared carbon fiber can be used for high performance aerospace materials, adsorbents with high efficiency, separating agents, catalysts and catalyst carriers and the like.

Description

Technical field: [0001] The invention relates to the field of coal deep processing and carbon material science and technology, in particular to a method for preparing spinnable mesophase and carbon fiber by using coal direct liquefaction residue-based asphaltenes as raw materials. Background technique: [0002] Coal is the most important energy resource with the largest reserves in my country, accounting for 75% of the entire energy structure. It is estimated that by 2050, my country's energy pattern dominated by coal will not change significantly. With the rapid development of economy and society and the continuous improvement of people's living standards, my country's demand for energy resources, especially the demand for oil, has increased rapidly, and the fluctuation and change of international oil prices directly affect my country's economic development and energy supply security. . Therefore, efficient and clean full utilization of coal resources is an important strat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/15
Inventor 张香平白璐聂毅董海峰张锁江
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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