Catalysts for dehydrogenating ethylbenzene to styrene
An ethylbenzene dehydrogenation production and catalyst technology, which is applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, hydrocarbon, etc., can solve the loss of potassium, catalyst deactivation, insufficient catalyst strength Advanced problems, to achieve the effect of good compressive strength and good technical effect
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Embodiment 1
[0024] 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 are put into an oven, baked at 40-80°C for 1-6 hours, then placed in a muffle furnace, and roasted at 500-1000°C for 2-6 hours to obtain the catalyst.
Embodiment 2～6
[0026] 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
[0034] The catalysts obtained in Examples 1 to 6 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, reaction temperature 620 ℃, water ratio (water / ethylbenzene) (weight) under the condition of 2.0, carry out the catalytic performance evaluation of ethylbenzene dehydrogenation to styrene, the results are shown in Table 2:
[0035] Table 2 Catalyst performance of ethylbenzene dehydrogenation to styrene *
[0036]
[0037] * : Catalyst performance is the average value of 200 hours after the reaction is stable.
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