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Spinnable asphalt prepared from coal liquefaction residue, and preparation method thereof, and carbon fiber

A technology of coal liquefaction residue and pitch fiber, which is applied in textiles and papermaking, fiber chemical characteristics, and chemical processing of tar pitch/petroleum pitch/natural pitch, etc., can solve the problems of inappropriate preparation of carbon fiber and inability to inspire carbon fiber, and achieve hydrogen The effect of high content and strong spinnability

Active Publication Date: 2018-01-26
CHNA ENERGY INVESTMENT CORP LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, pitch spinning with a softening point of only 230-240°C is not suitable for further preparation of carbon fibers required by industry.
Therefore, this method does not suggest that industrial carbon fiber

Method used

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  • Spinnable asphalt prepared from coal liquefaction residue, and preparation method thereof, and carbon fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] This example illustrates the preparation of spinnable pitch and carbon fibers from coal liquefaction residue according to the present invention.

[0065] (1) Refined coal liquefaction residue. The coal liquefaction residue (the number average molecular weight is 580, the weight average molecular weight is 700, the softening point is 170°C, the oxygen content is 1% by weight, and the carbon-hydrogen ratio is 1.2:1; Shenhua Coal-to-oil Shanghai Research Institute) and tetrahydrofuran by weight The ratio is 1:2 for mixing, and the mixed product is subjected to hot-melt filtration through a filter. The conditions include: the pore size of the filter element is 50 μm, the filtration temperature is 160 ° C, the pressure is 0.3 MPa, and then the solvent is evaporated to obtain a refined coal liquefaction residue with a softening point of 160 °C, the ash content is 0.01% by weight;

[0066] (2) Spinnable asphalt. Crush 600g of refined coal liquefaction residue into powder, pu...

Embodiment 2

[0074] This example illustrates the preparation of spinnable pitch and carbon fibers from coal liquefaction residue according to the present invention.

[0075] (1) Refined coal liquefaction residue. Coal liquefaction residue (number-average molecular weight 620, weight-average molecular weight 740, softening point 180°C, oxygen content 0% by weight, carbon-hydrogen ratio 1.35:1; Shenhua Coal-to-Liquid Shanghai Research Institute) and coal liquefaction CNPC (Shenhua Coal-to-Oil Shanghai Research Institute) Mixed according to the weight ratio of 1:3, the mixed product is hot-melt filtered through the filter. Evaporated to obtain a refined coal liquefaction residue with a softening point of 175°C and an ash content of 0.03% by weight;

[0076] (2) Spinnable asphalt. Crush 600g of refined coal liquefaction residue into powder, put it into the reaction kettle, and pass air (flow rate: 5ml / min·g), carry out oxidation reaction at 310°C for 5h, heat stirring speed 150r / min, and obt...

Embodiment 3

[0084] This example illustrates the preparation of spinnable pitch and carbon fibers from coal liquefaction residue according to the present invention.

[0085](1) Refined coal liquefaction residue. The coal liquefaction residue (the number average molecular weight is 520, the weight average molecular weight is 640, the softening point is 140°C, the oxygen content is 0.6% by weight, the carbon-hydrogen ratio is 1.15:1; Shenhua Coal-to-oil Shanghai Research Institute) and toluene according to weight The mixture is mixed at a ratio of 1:0.5, and the mixed product is subjected to hot-melt filtration through a filter. The conditions include: the pore size of the filter element is 100 μm, the filtration temperature is 180 ° C, the pressure is 0.6 MPa, and then the solvent is evaporated to obtain a refined coal liquefaction residue with a softening point of 140 °C, the ash content is 0.015% by weight;

[0086] (2) Spinnable asphalt. Crush 600g of refined coal liquefaction residue ...

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Abstract

The invention relates to the field of utilization of coal liquefaction residue to produce carbon fibers, and discloses spinnable asphalt prepared from coal liquefaction residue, and a preparation method thereof, and carbon fiber. According to the present invention, through matrix-assisted laser desorption ionization time-of-flight mass spectrometry, the determination results show that the number average molecular weight of the spinnable asphalt is 600-1000, and the weight average molecular weight of the spinnable asphalt is 700-1200; through element analysis, the results show that the ratio ofthe C atom to the H atom in the spinnable asphalt is (1.4-1.6):1, and based on the total amount of the spinnable asphalt, the oxygen content is 1.8-2.7 wt%, and the hydrogen content is more than 4.5wt%; and the spinnable asphalt is produced by using the coal liquefaction residue, and the carbon fiber is prepared.

Description

technical field [0001] The invention relates to the production and utilization of coal liquefaction residue to produce carbon fiber, in particular to a spinnable pitch prepared from coal liquefaction residue, a preparation method thereof and carbon fiber. Background technique [0002] Pitch-based carbon fiber has the advantages of high strength, high modulus, good fatigue resistance, good corrosion resistance, high thermal conductivity, good friction performance, etc., and can be widely used in brake pads, insulation blankets, seals and other fields. [0003] The traditional spinnable pitch raw materials are coal tar pitch or petroleum pitch, which generally have the problems of complicated reaction process, low yield and poor spinnability. [0004] CN105219414A discloses a method for preparing pitch for carbon fibers, comprising (a) treating a first carbonaceous raw material comprising coal tar as a main component and a second carbonaceous material comprising a monocyclic o...

Claims

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Application Information

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IPC IPC(8): D01F9/15C10C3/02
Inventor 刘均庆郑冬芳孔国红宫晓颐段春婷梁朋王秋实
Owner CHNA ENERGY INVESTMENT CORP LTD
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