Needle coke and its technology prepared by medium and low temperature coal tar refined pitch by variable temperature thermal polymerization
A technology for low-temperature coal tar and refined pitch, applied in the field of coal chemical industry, can solve problems such as the lack of research on needle coke technology, and achieve the effects of reducing thermal polycondensation reaction activity, stable growth and excellent quality
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Embodiment 1
[0029] Put 2.5kg of medium and low temperature coal tar in the rectification reactor, and cut the medium and low temperature coal tar under reduced pressure to obtain a softening point of 45°C and an aromaticity of f A 0.73 360-480°C fractional asphalt, take 100g of asphalt for pulverization, mix the pulverized asphalt, 300g of extractant and 8g of modifier, put it in a reaction kettle, first raise the temperature to 85°C for solvent extraction, at 100r·min -1 Stir at a constant temperature for 1 hour, after stirring, let stand at constant temperature for 4 hours, discharge macromolecular impurities from the bottom of the kettle, continue to raise the temperature to 150°C, let stand at constant temperature for 4 hours, remove insoluble matter from the bottom of the kettle, and continue to raise the temperature to separate the solvent from the top of the kettle , to obtain refined raw pitch at the bottom of the kettle; at 3°C·min -1 The heating rate is raised to 430°C, the pre...
Embodiment 2
[0032] Put 2.5kg of medium and low temperature coal tar in the rectification reactor, and cut the medium and low temperature coal tar under reduced pressure to obtain a softening point of 45°C and an aromaticity of f A 0.73 360-480°C fractional asphalt, take 100g of asphalt for pulverization, mix the pulverized asphalt, 300g of extractant and 6g of modifier, put it in a reaction kettle, first raise the temperature to 85°C for solvent extraction, at 100r·min -1 Stir at a constant temperature for 1 hour. After stirring, let stand at constant temperature for 4 hours, discharge macromolecular impurities from the bottom of the kettle, continue to raise the temperature to 145°C, let stand at constant temperature and heat for 4 hours, remove insoluble matter from the bottom of the kettle, and continue to raise the temperature to separate the solvent from the top of the kettle. , to obtain refined raw pitch at the bottom of the kettle; at 3°C·min -1 The heating rate is raised to 430°...
Embodiment 3
[0035] Put 2.5kg of medium and low temperature coal tar in the rectification reactor, and cut the medium and low temperature coal tar under reduced pressure to obtain a softening point of 47°C and an aromaticity of f A 0.75 360-480°C fractional asphalt, take 100g of asphalt for pulverization, mix the pulverized asphalt, 380g of extractant and 8g of modifier, put it in a reaction kettle, first raise the temperature to 75°C for solvent extraction, at 100r·min -1 Stir at a constant temperature for 1 hour. After stirring, let stand at constant temperature for 4 hours, discharge macromolecular impurities from the bottom of the kettle, continue to raise the temperature to 140°C, let stand at constant temperature and heat for 4 hours, remove insoluble matter from the bottom of the kettle, and continue to raise the temperature to separate the solvent from the top of the kettle. , to obtain refined raw pitch at the bottom of the kettle; at 3°C·min -1 The heating rate is raised to 440°...
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Abstract
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