A kind of preparation method of low-toxicity modified coal tar pitch for road construction
A coal tar pitch and modification technology, which is applied in the field of preparation of low-toxic modified coal tar pitch, can solve the problems of high energy consumption, loss of coal tar pitch, poor performance, etc., and reduce the content of polycyclic aromatic hydrocarbons and the amount of modifiers less, the effect of road performance improvement
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Embodiment 1
[0021] 10 g of coal tar pitch, 4% modifier terephthalaldehyde, and 5% catalyst p-toluenesulfonic acid were mixed, 50 mL of solvent cyclohexane was added, and the reaction was stirred at room temperature for 4 hours. The content indexes of PAHs in the modified coal tar pitch are as follows:
[0022]
Embodiment 2
[0024] 10 g of coal tar pitch, 8% modifier terephthalaldehyde, and 5% catalyst p-toluenesulfonic acid were mixed, 50 mL of solvent cyclohexane was added, and the reaction was stirred at room temperature for 4 hours. The content indexes of PAHs in the modified coal tar pitch are as follows:
[0025]
Embodiment 3
[0027] 10 g of coal tar pitch, 10% modifier terephthalaldehyde, and 5% catalyst p-toluenesulfonic acid were mixed, 50 mL of solvent cyclohexane was added, and the reaction was stirred at room temperature for 4 hours. The content indexes of PAHs in the modified coal tar pitch are as follows:
[0028]
[0029]
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