A device and method for catalytic dehydrogenation of chlorine tail in chlor-alkali industry
A technology for catalytic dehydrogenation and chlor-alkali industry. It is applied in the direction of chlorine/hydrogen chloride, chlorine/hydrogen chloride purification, chemical instruments and methods, etc. It can solve problems such as carrier corrosion, high reaction temperature, and fast catalyst deactivation rate.
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Embodiment 1
[0031] Example 1: A device for catalytic dehydrogenation of chlorine tail in chlor-alkali industry
[0032] figure 1It is the diagram of the industrial tail chlorine catalytic dehydrogenation device of the present invention. The device includes a fluidized bed, a feed bin, and a cyclone separator, and is characterized in that: the device is composed of a reaction system and a reduction system, and the reaction system includes a reaction fluidized bed 2, a reaction fluidized bed feed bin 8, a first cyclone Separator 3; reduction system includes reducing fluidized bed 6, reducing fluidized bed feed bin 4, second cyclone separator 7; tail chlorine inlet is provided at the bottom of reaction fluidized bed 2, and tail chlorine inlet pipeline is provided with tail chlorine Heater 1, the top of the reaction fluidized bed 2 is connected to the first cyclone separator 3, the middle part of the reaction fluidized bed 2 is provided with a catalyst outlet, and the catalyst outlet is conn...
Embodiment 2
[0039] Embodiment 2: A kind of method of chlor-alkali industrial tail chlorine catalytic dehydrogenation
[0040] The components of industrial tail chlorine are: H 2 , 3.97%; Cl 2 , 72.85%; O 2 , 9.93%; N 2 , 13.25%.
[0041] Cu supported on activated carbon was used as the catalyst (Cu / C). The Cu loading of Cu / C was 5%. The catalyst packing height is 0.45m, the reaction temperature is 80°C, and the apparent operating gas velocity is U f =0.3m / s. Under this condition, when the tail chlorine is dehydrogenated, the hydrogen conversion rate can reach 96.8%, and the selectivity of the oxygen-hydrogen reaction can reach 0.829. The catalyst reduction fluidized bed temperature is 250°C, the catalyst packing height is 0.50m, and the apparent operating gas velocity of hydrogen is U f =0.15~0.22m / s. The residence time of the catalyst in the reaction fluidized bed is 2.5h, and the residence time in the reducing fluidized bed is 2h.
Embodiment 3
[0042] Embodiment 3: A kind of method of chlor-alkali industrial tail chlorine catalytic dehydrogenation
[0043] The components of industrial tail chlorine are: H 2 , 3.05%; Cl 2 , 72.36%; O 2 , 10.31%; N 2 , 14.25%.
[0044] Take Al 2 o 3 The supported Pd is the catalyst. Pd / Al 2 o 3 The Pd loading was 1%. The catalyst packing height is 0.45m, the catalyst reaction fluidized bed temperature is 60°C, and the apparent operating gas velocity is U f =0.35m / s. Under this condition, when the tail chlorine is dehydrogenated, the hydrogen conversion rate can reach 98.1%, and the selectivity of the oxygen-hydrogen reaction can reach 0.792. The catalyst reduction fluidized bed temperature is 200°C, the catalyst packing height is 0.50m, and the apparent operating gas velocity is U f =0.20m / s. The residence time of the catalyst in the reaction fluidized bed is 3h, and the residence time in the reducing fluidized bed is 2h.
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