Production method of p-chlorotoluene
A production method and technology of p-chlorotoluene are applied in the production field of p-chlorotoluene and can solve the problem of high content of chlorotoluene
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Embodiment 1
[0013] A kind of production method of p-chlorotoluene, comprises the following steps:
[0014] (1) Chlorination of toluene: Put toluene in a chlorination kettle and add a catalyst, and pass chlorine gas at 40-60°C (for example, 40°C, 50°C, 60°C) for chlorination reaction for 18-20 hours, toluene and The molar ratio of chlorine gas is 1:1.2. The catalyst used in the reaction is composed of the following components by weight percentage after being reacted at 120-150°C (for example, 120°C, 130°C, 150°C) for 6-8 hours, and then activated in an 800°C high-temperature activation furnace. ~6 hours to make:
[0015] Alumina 25%
[0016] Silica 65%
[0018] Catalyst consumption is 2% of toluene weight.
[0019] After the reaction is finished, the chlorinated solution is filtered to remove the catalyst through a plate and frame filter press to obtain a crude mixed chlorotoluene liquid;
[0020] (2) Removal of toluene: the crude mixed chlorotoluene liquid ...
Embodiment 2
[0025] The catalyst used in the reaction is prepared by reacting the following components by weight percentage at 120-150°C (for example, 120°C, 130°C, 150°C) for 6-8 hours, and then entering the 800°C high-temperature activation furnace for 4-6 hours of activation:
[0026] Alumina 20%
[0029] Catalyst consumption is 3% of toluene weight.
[0030] All the other are with embodiment 1. In the total amount of p-chlorotoluene and o-chlorotoluene in the final product, p-chlorotoluene reaches more than 80%. The content of the product after rectification reaches more than 99.5%.
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