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Pitch-based carbon fiber and preparation method thereof

A pitch-based carbon fiber, pitch raw material technology, applied in the direction of fiber chemical characteristics, textiles and papermaking, etc., to achieve the effect of rich source of raw materials and low price

Inactive Publication Date: 2012-05-30
DALIAN CHUANGDA TECH TRADE MARKET
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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 residues are: CN 1827697A, CN18 07715A, Fuel Processes s ing Technology (2 000, 62: 109-118), Coal Conversion (2001, 24 (1): 15-19), Combustion Science and technology (2006, 12(4): 295-299), Journal of Fuel Chemistry (2007, 35(1): 109-112), etc., but there is no literature report on the preparation of pitch-based carbon fiber from coal direct liquefaction residue as raw material. method

Method used

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  • Pitch-based carbon fiber and preparation method thereof
  • Pitch-based carbon fiber and preparation method thereof
  • Pitch-based carbon fiber and preparation method thereof

Examples

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Effect test

Embodiment 1

[0036] Grind 10 kg of coal direct liquefaction residue into a powder with a particle size of 0.01-0.3 microns. Fully mix the coal direct liquefaction residue powder with 20 kg tetrahydroquinoline to obtain a mixed solution. Put the mixed solution into an autoclave, replace the air in the autoclave with nitrogen, then heat and pressurize while feeding hydrogen for hydrogenation; remove most of the sulfur, oxygen, nitrogen, etc. contained in the original residue by distillation under reduced pressure element, use vacuum filtration to remove tetrahydroquinoline insoluble matter, recover tetrahydroquinoline solvent through vacuum distillation, and recycle. The asphalt raw material produced in the asphalt preparation process is heated and melted and melt-spun through a spinning machine, and the viscosity of the raw material is controlled at 10Pa during the spinning process. S, the spinning temperature is 350°C, and the raw silk is obtained by melt spinning. The raw silk is in...

Embodiment 2

[0038] Grind 10 kg of coal direct liquefaction residue into a powder with a particle size of 0.0-0.3 microns. Thoroughly mix the coal direct liquefaction residue powder with 30 kg of tetrahydroquinoline to obtain a mixed solution. Put the mixed solution into an autoclave, replace the air in the autoclave with nitrogen, then heat and pressurize while feeding hydrogen for hydrogenation; remove most of the sulfur, oxygen, nitrogen, etc. contained in the original residue by distillation under reduced pressure element, use vacuum filtration to remove tetrahydroquinoline insoluble matter, recover tetrahydroquinoline solvent through vacuum distillation, and recycle. The asphalt raw material produced in the asphalt preparation process is heated and melted and melt-spun through a spinning machine, and the viscosity of the raw material is controlled at 15Pa during the spinning process. S, the spinning temperature is 380°C, and the raw silk is obtained by melt spinning. The raw sil...

Embodiment 3

[0040] 01-0.3微米的粉丝。 1 0 kg of coal direct liquefaction residue ground into a particle size of 0. 01-0.3 micron powder. Thoroughly mix the coal direct liquefaction residue powder with 40 kg of tetrahydroquinoline to obtain a mixed solution. Put the mixed solution into an autoclave, replace the air in the autoclave with nitrogen, then heat and pressurize while feeding hydrogen for hydrogenation; remove most of the sulfur, oxygen, nitrogen, etc. contained in the original residue by distillation under reduced pressure element, use vacuum filtration to remove tetrahydroquinoline insoluble matter, recover tetrahydroquinoline solvent through vacuum distillation, and recycle. The asphalt raw material produced in the asphalt preparation process is heated and melted and melt-spun through a spinning machine, and the viscosity of the raw material is controlled at 18Pa during the spinning process. S, the spinning temperature is 400°C, and the raw silk is obtained by melt spinning. Th...

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Abstract

The invention discloses a pitch-based carbon fiber and a preparation method thereof. The preparation method comprises the following steps of: putting a mixed solution of direct coal liquefaction residue powder and a tetrahydroquinoline solvent in an autoclave, heating up to 150-400 DEG C and pressurizing to 2-50 MPa after replacing the air in the autoclave with nitrogen, simultaneously introducing hydrogen for hydrogenation, removing most sulfur, oxygen and nitrogen contained in the primary residue via vacuum distillation, removing the undissolved substances of the tetrahydroquinoline via vacuum filtration, recovering and recycling the tetrahydroquinoline solvent via vacuum distillation; finally obtaining the pitch-based carbon fibers after performing the processes of melt spinning, preoxidation, low-temperature carbonization, high-temperature carbonization, surface treatment, post treatment and the like on the soluble substances of the tetrahydroquinoline.

Description

technical field [0001] The invention relates to a pitch-based carbon fiber 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 structure of "rich coal, poor oil, and little gas", the continuous and rapid growth of oil demand, and the requirements of sustainable development determine that my...

Claims

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Application Information

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IPC IPC(8): D01F9/15
Inventor 王爽
Owner DALIAN CHUANGDA TECH TRADE MARKET
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