Method for preparing needle coke from medium-low-temperature coal tar
A technology of low-temperature coal tar and needle coke, which is applied in coking ovens, petroleum industry, coking carbon-containing materials, etc., can solve the problems of lack of recycling methods, pollute the environment, waste resources, etc., achieve significant economic benefits, low equipment requirements, low cost effect
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Embodiment 1
[0033] Take 200g of medium and low temperature coal tar and place it in a reaction kettle, and distill it at atmospheric pressure to 360°C to separate heavy components, mix methanol and benzene evenly at a mass ratio of 7:3 to obtain a mixed solvent, and separate the heavy components above Put it into the reaction kettle, heat to 60°C and stir evenly, then add the mixed solvent into the reaction kettle, the mass ratio of the mixed solvent to the heavy component is 1:0.5, stir at 60°C for 3 hours, stop stirring and let it stand at 60°C Set the layers for 3 hours, separate the highly reactive substances by filtration, analyze the clear liquid obtained after removing the highly reactive substances, and analyze the unreacted mixed solvent to obtain the needle coke raw material pitch 1 # , the obtained needle coke raw material pitch 1 # Needle coke is obtained by coking and calcination process1 # , and its bias-off microstructure is as figure 1 shown.
Embodiment 2
[0035] Take 200g of medium-low temperature coal tar and put it in the reaction kettle, and distill it to 380°C under atmospheric pressure to separate the heavy components, mix acetic acid and heptane at a mass ratio of 5:5 to obtain a mixed solvent, and separate the above-mentioned heavy components Send it into the reaction kettle, heat to 90°C and stir evenly, then add mixed solvent into the reaction kettle, the mass ratio of mixed solvent to heavy components is 1:2, stir at 90°C for 2 hours, stop stirring at 90°C Stand and separate for 4 hours, use the overflow method to separate the highly reactive substances, analyze the clear liquid obtained after removing the highly reactive substances, and analyze the unreacted mixed solvent to obtain the needle coke raw material pitch 2 # , the obtained needle coke raw material pitch 2 # Needle coke is obtained by coking and calcination process 2 # , and its bias-off microstructure is as figure 2 shown.
Embodiment 3
[0037]Take 200g of medium and low temperature coal tar in the reaction kettle, distill under reduced pressure to 320°C to separate heavy components, mix wax oil and anthracene oil in a mass ratio of 4:6 to obtain a mixed solvent, and separate the heavy components Put the heavy components into the reaction kettle, heat to 140°C and stir evenly, then add the mixed solvent into the reaction kettle, the mass ratio of the mixed solvent to the heavy components is 1:1, stir at 140°C for 4h, stop stirring at Stand at 140°C for 5 hours, separate the highly reactive substances by suction filtration, analyze the clear liquid obtained after removing the highly reactive substances, and analyze the unreacted mixed solvent to obtain needle coke raw material pitch 3 # , the obtained needle coke raw material pitch 3 # Needle coke3 obtained by coking and calcination process # , and its bias-off microstructure is as image 3 shown.
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