Production process of p-trifluoromethyl aniline
A technology of trifluoromethylaniline and p-chlorobenzotrifluoride, which is applied in the field of production of p-trifluoromethylaniline, and can solve the problems of large pollution and low single-pass conversion rate
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Embodiment 1
[0014] A kind of production method of p-trifluoromethylaniline: p-chlorobenzotrifluoride and liquefied ammonia are reacted in an autoclave in the presence of alcohol and catalyst, and the consumption of p-chlorobenzotrifluoride, liquid ammonia, alcohol and catalyst They are: 950kg of p-chlorobenzotrifluoride, 450kg of liquid ammonia, 800kg of alcohol, and 80kg of catalyst. The reaction temperature is 140-150°C, the pressure is 6-7.5MPa, and the reaction time is 9-13 hours. After the reaction is over, excess liquid ammonia is absorbed into ammonia water, and industrial alcohol is flashed out at the same time, and the catalyst is removed by filtration, and the catalyst is regenerated mechanically. The obtained p-trifluoromethylaniline crude product is rectified to obtain 560 kg of finished product, and 220 kg of raw materials are recovered, and single-pass conversion The yield is 66%, and the yield is 90%. Above-mentioned catalyst is made up of following weight components:
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Embodiment 2
[0020] A kind of production method of p-trifluoromethylaniline: p-chlorobenzotrifluoride and liquefied ammonia are reacted in an autoclave in the presence of alcohol and catalyst, and the consumption of p-chlorobenzotrifluoride, liquid ammonia, alcohol and catalyst They are: p-chlorobenzotrifluoride 900kg, liquid ammonia 400kg, alcohol 700kg, catalyst 70kg, the reaction temperature is 140-150°C, the pressure is 6-7.5MPa, and the reaction time is 9-13 hours. After the reaction, the excessive liquid ammonia is absorbed into ammonia water, and industrial alcohol is flashed out simultaneously, and the catalyst is removed by filtration, and the catalyst regeneration is applied mechanically. The rate is about 90%. Above-mentioned catalyst is made up of following weight components:
[0021] Ferrocene 31%
[0022] Triphenylphosphine 50%
[0024] Tetrabutylammonium bromide 7%.
Embodiment 3
[0026] A kind of production method of p-trifluoromethylaniline: p-chlorobenzotrifluoride and liquefied ammonia are reacted in an autoclave in the presence of alcohol and catalyst, and the consumption of p-chlorobenzotrifluoride, liquid ammonia, alcohol and catalyst They are: p-chlorobenzotrifluoride 1000kg, liquid ammonia 600kg, alcohol 900kg, catalyst 90kg, the reaction temperature is 140-150°C, the pressure is 6-7.5MPa, and the reaction time is 9-13 hours. After the reaction, the excessive liquid ammonia is absorbed into ammonia water, and industrial alcohol is flashed out simultaneously, and the catalyst is removed by filtration, and the catalyst is regenerated and applied mechanically. The rate is about 90%. Above-mentioned catalyst is made up of following weight components:
[0027] Ferrocene 50%
[0028] Triphenylphosphine 31%
[0030] Tetrabutylammonium bromide 2%.
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