Method for preparing catalysts for dehydrogenating ethylbenzene to making styrene
A catalyst technology for the dehydrogenation of ethylbenzene, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc., can solve the problems of catalyst deactivation and insufficient catalyst strength
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Embodiment 1
[0026] 190.5 grams of iron oxide red, 90.1 grams of iron oxide yellow, 50.6 grams of potassium carbonate, 90.8 grams of persimmon nitrate, 10.3 grams of ammonium molybdate, 10.4 grams of magnesium oxide and carboxymethyl cellulose were stirred in a kneader for 1 hour, and an appropriate amount was added to remove Ionized water, stir again for half an hour, make the slurry and take it out. At room temperature, add 4000 grams of support body B impregnated by 4 mol / liter of potassium carbonate solution in the slurry and stir evenly to form a uniform coating by A. The catalyst particles were put into an oven and baked at 40°C for 3 hours, then placed in a muffle furnace and calcined at 800°C for 2 hours to prepare the catalyst.
Embodiment 2
[0028] Catalysts were prepared according to the conditions and operating steps of Example 1, except that the dosage of active components, the shape of the support, materials, etc. were changed, as shown in Table 1.
Embodiment 7～13
[0036]The bisque fired ceramic rings were soaked at different temperatures and potassium salt concentrations for different times, and after drying, they were uniformly coated with the active component slurry of Example 1, dried in an oven, and then fired in a muffle furnace. See Table 2 for the pretreatment conditions of the support body and the catalyst precursor and the thickness and compressive strength of the active components of the finished catalyst:
[0037] Table 2 The pretreatment conditions of the support and the relevant physical parameters of the catalyst prepared after coating the active component
[0038]
[0039] The catalysts obtained in Examples 1 to 13 and Comparative Example 1 were put into an isothermal reactor with an inner diameter of 1 "respectively, and the reaction pressure was normal pressure and the liquid space velocity was 1.0 hour -1 , the reaction temperature was 620°C, and the water / ethylbenzene weight ratio was 2.0, and the catalytic perform...
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