A pretreatment method for oxidizing and not melting pitch balls
A pitch ball, hourly technology, applied in the processing of tar pitch/petroleum pitch/natural pitch, processing tar pitch/petroleum pitch/natural pitch by heating, and chemically processing tar pitch/petroleum pitch/natural pitch, etc. It can solve the problems of flammable and explosive organic solvents, high risk, dangerous production process, etc., and achieve the effects of shortened reaction time, high safety and reduced cost.
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Embodiment 1
[0029] Put 1 kg of 0.05mm naphthalene pitch balls into the oxidation non-melting reactor, feed 50 liters / h of air, raise the temperature from room temperature to 80°C at a heating rate of 60°C / h, and stay for 2h; then switch to volume Mixed gas of n-heptane vapor and N2 with a ratio of 0.1:100, the gas flow rate is 100 liters / h, the temperature is raised from 80°C to 90°C at a heating rate of 60°C / h, and the temperature is raised for 5 hours to obtain asphalt balls with all naphthalene removed ;Finally switch to 300 liters / h of air from 90°C to 280°C at a heating rate of 240°C / h, and stay for 0.5h to obtain oxidized asphalt balls.
[0030] In the embodiment, the oxidation and non-melting degree of asphalt balls can be calculated according to the cohesive rate: the oxidized and non-melting pitch balls in N 2 Heat up to 800°C in the atmosphere and stay for 1 hour to obtain carbonized asphalt balls; randomly select 30-50 carbonized asphalt balls, and the percentage of the total n...
Embodiment 2
[0034] Put 1 kg of 2mm naphthalene pitch-containing balls into the oxidation non-melting reactor, feed 150 liters / h of air, raise the temperature from room temperature to 80°C at a heating rate of 10°C / h, and stay for 10h; then switch to volume ratio It is a mixed gas of 30:100 methanol vapor and Ar, the gas flow rate is 500 liters / h, the temperature is raised from 80°C to 120°C at a heating rate of 5°C / h, and the temperature is raised for 50 hours to obtain asphalt balls with all naphthalene removed; finally switch 1000 liters / h of air is heated from 120°C to 350°C at a rate of 100°C / h, and stays for 5 hours to obtain oxidized asphalt balls.
[0035] After testing, the bonding rate is 0.1%, the oxygen content is 6.3wt%, CO 2 The specific surface area is 94.4m 2 / g, the pore structure is shown in the attached figure 2 .
Embodiment 3
[0037] Put 1 kg of 1mm naphthalene pitch-containing balls into the oxidation non-melting reactor, feed 100 liters / h of air, raise the temperature from room temperature to 50°C at a heating rate of 20°C / h, and stay for 20h; then switch to volume ratio It is a mixed gas of 20:100 petroleum ether vapor and N2, the gas flow rate is 300 liters / h, the temperature is raised from 50°C to 100°C at a heating rate of 10°C / h, and the temperature is raised for 30h to obtain asphalt balls from which all naphthalene has been removed; finally Switch to 500 liters / h of air from 100°C to 300°C at a heating rate of 120°C / h, and stay for 3 hours to obtain oxidized pitch balls.
[0038] After testing, the bonding rate is 0.08%, the oxygen content is 8.8wt%, and the CO 2 The specific surface area is 100.9m 2 / g, the pore structure is shown in the attached image 3 .
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