Built-in micro-interface oxidation system and built-in micro-interface oxidation method for preparing terephthalic acid from p-xylene
A terephthalic acid and oxidation system technology, applied in the field of built-in micro-interface oxidation system, can solve the problems of difficulty in obtaining a breakthrough improvement in reaction performance, limited phase boundary area and mass transfer coefficient, and affecting the overall efficiency of the reaction. The effect of equipment operation cycle, ensuring industrialized large-scale production, and reducing investment intensity
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[0062] refer to figure 1 As shown, the built-in micro-interface oxidation system for preparing terephthalic acid from p-xylene includes a first reactor 10 , a rectification column 20 and a second reactor 30 .
[0063] Wherein, the side wall of the first reactor 10 is provided with a first outlet 11, and a second inlet 12 and a mixed raw material inlet 14 are provided at a position lower than the opposite side wall, and a second outlet 13 is provided at the top of the first reactor 10. The material that the second outlet 13 comes out mainly contains acetic acid and steam.
[0064] The side wall of the rectifying tower 20 is provided with a material inlet 21, and the bottom is provided with a material outlet 22. The side wall of the second reactor 30 is provided with a first inlet 31 at the lower position, and the other side is provided with an air inlet 33. The first outlet 11 is connected with the material inlet 21, and the first inlet 31 is connected with the material outlet...
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