Coupling reaction device and method for preparing aniline through nitrobenzene hydrogenation
A technology of coupling reaction and nitrobenzene, which is applied to the coupling reaction device and reaction field of nitrobenzene hydrogenation to produce aniline, can solve the problems of easy carbon deposition of catalyst, low nitrobenzene content and high nitrobenzene content, and achieves carbon deposition. volume reduction effect
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Embodiment 1
[0025] Such as figure 1 The device for producing aniline by hydrogenation of nitrobenzene is shown. The ratio of the cross-sectional area of the first reaction zone to the cross-sectional area of the second reaction zone is two. The ratio of the cross-sectional area of the third reaction zone to the cross-sectional area of the second reaction zone is four. The catalyst used is a metal-loaded catalyst, with copper as the main active component and silicon dioxide as the carrier. The average particle diameter of the catalyst is 400 μm, and the content of particles below 80 μm is 6%. The reaction conditions in the first reaction zone are: the superficial gas velocity is 0.6m / s, the molar ratio of hydrogen to nitrobenzene is 8, and the average reaction temperature is controlled at 200°C; the reaction conditions in the second reaction zone are: the superficial gas velocity is 2m / s, the molar ratio of hydrogen to nitrobenzene is 13, and the average reaction temperature is c...
Embodiment 2
[0027] Such as figure 1The device for producing aniline by hydrogenation of nitrobenzene is shown. The ratio of the cross-sectional area of the first reaction zone to the cross-sectional area of the second reaction zone was 1.2. The ratio of the cross-sectional area of the third reaction zone to the cross-sectional area of the second reaction zone is four. The catalyst used is a metal-loaded catalyst, with copper as the main active component and silicon dioxide as the carrier. The average particle diameter of the catalyst is 400 μm, and the content of particles below 80 μm is 6%. The reaction conditions in the first reaction zone are: the superficial gas velocity is 0.6m / s, the molar ratio of hydrogen to nitrobenzene is 8, and the average reaction temperature is controlled at 200°C; the reaction conditions in the second reaction zone are: the superficial gas velocity is 2m / s, the molar ratio of hydrogen to nitrobenzene is 13, and the average reaction temperature is c...
Embodiment 3
[0029] Such as figure 1 The device for producing aniline by hydrogenation of nitrobenzene is shown. The ratio of the cross-sectional area of the first reaction zone to the cross-sectional area of the second reaction zone was five. The ratio of the cross-sectional area of the third reaction zone to the cross-sectional area of the second reaction zone is four. The catalyst used is a metal-loaded catalyst, with copper as the main active component and silicon dioxide as the carrier. The average particle diameter of the catalyst is 400 μm, and the content of particles below 80 μm is 6%. The reaction conditions in the first reaction zone are: the superficial gas velocity is 0.6m / s, the molar ratio of hydrogen to nitrobenzene is 8, and the average reaction temperature is controlled at 200°C; the reaction conditions in the second reaction zone are: the superficial gas velocity is 2m / s, the molar ratio of hydrogen to nitrobenzene is 13, and the average reaction temperature is...
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