Mesophase pitch prepared from residues of coal liquefaction, and preparation method and application thereof
A technology of coal liquefaction residue and mesophase pitch, which is applied in chemical processing of tar pitch/petroleum pitch/natural pitch, textiles and papermaking, fiber chemical characteristics, etc. Problems such as high softening point and high reaction temperature
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preparation example 1
[0049] This preparation example illustrates the refining process of the coal liquefaction residue of the present invention.
[0050] The coal liquefaction residue was subjected to rotary evaporation at a temperature of 70° C. for 7 hours to obtain a refined coal liquefaction residue A. After analysis, the carbon content was 90% by weight, the aromaticity was 0.7, and the ash content was 0.1% by weight.
[0051] The coal liquefaction residue was subjected to rotary evaporation at a temperature of 80° C. for 8 hours to obtain a refined coal liquefaction residue B. After analysis, the carbon content was 80% by weight, the aromaticity was 0.73, and the ash content was 0.09% by weight.
[0052] The coal liquefaction residue was subjected to rotary evaporation at a temperature of 78° C. for 5 hours to obtain a refined coal liquefaction residue C. After analysis, the carbon content was 86% by weight, the aromaticity was 0.85, and the ash content was 0.11% by weight.
[0053] The coal...
Embodiment 1
[0055] This example illustrates the method for preparing mesophase pitch from the coal liquefaction residue of the present invention.
[0056] Stir and mix 250g of refined coal liquefaction residue A and 83g of tetrahydronaphthalene solution in the presence of ultrasonic waves. The ultrasonic frequency is 80Hz, the ultrasonic power is 40kW, the mixing temperature is 25°C, and the mixing time is about 4 minutes to obtain a mixture;
[0057] Put this mixture into a 1L autoclave, blow out the air in it with nitrogen, keep the pressure in the autoclave at 1MPa, and then start the thermal polymerization reaction: the stirring rate is controlled at 150r / min, and the temperature is raised to a thermal polymerization temperature of 380 Thermal polymerization at ℃ for 10 hours, the reaction process self-increases the pressure to reach a thermal polymerization pressure of 1.5 MPa.
[0058] After the thermal polymerization stopped, the autoclave was purged with nitrogen to discharge the ...
Embodiment 2
[0061] This example illustrates the method for preparing mesophase pitch from the coal liquefaction residue of the present invention.
[0062] Stir and mix 250g of refined coal liquefaction residue B and 62.5g of tetrahydronaphthalene solution in the presence of ultrasonic waves. The ultrasonic frequency is 70Hz, the ultrasonic power is 50kW, the mixing temperature is 40°C, and the mixing time is about 5 minutes to obtain a mixture;
[0063] Put this mixture into a 1L autoclave, blow out the air in it with nitrogen, keep the pressure in the autoclave at 1MPa, and then start the thermal polymerization reaction: the stirring rate is controlled at 150r / min, and the temperature is raised to a thermal polymerization temperature of 390 Thermal polymerization is kept at ℃ for 8 hours, and the pressure is raised from the reaction process to reach a thermal polymerization pressure of 2.0 MPa.
[0064] After the thermal polymerization stopped, the autoclave was purged with nitrogen to d...
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Abstract
Description
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Application Information
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