Method for preparing styrene catalyst through ethylbenzene dehydrogenation
A technology for the dehydrogenation of ethylbenzene and styrene, which is applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc., can solve the problem of insufficient catalyst bulk density and pressure resistance Insufficient strength and other problems, to achieve the effect of improving compressive strength, increasing bulk density and prolonging service life
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Embodiment 1
[0030] Knead 300 grams of red iron oxide, 70.6 grams of potassium carbonate, 90.5 grams of persimmon nitrate, 6.5 grams of ammonium tungstate, 10.4 grams of magnesium oxide, 10.5 grams of calcium oxide, turmeric powder, and carboxymethyl cellulose (see Table 1) Stir in the machine for 1 hour, add deionized water, and stir for another half an hour, take out the extruded strips, extrude them into particles with a diameter of 3 mm and a length of 5-10 mm, put them in an oven, bake at 80°C for 4 hours, and then place them in a muffle furnace. The catalyst was prepared by calcining at 780°C for 6 hours. Embodiment 2, embodiment 3, embodiment 4, embodiment 5, the preparation method of embodiment 6 are the same as embodiment 1, just add different proportions of cerium oxide, cerium carbonate, cerium oxalate and cerium nitrate and different proportions of scallop powder and carboxymethylcellulose. The catalyst preparation method of the comparative example is the same as that of Examp...
Embodiment 7～12
[0034] According to the same catalyst components and preparation methods as in Example 4, different types and / or amounts of porogens were added to prepare catalysts, as shown in Table 2.
[0035] Table 2 Fe-K-Ce-W Catalysts Containing Different Types of Porogens
[0036]
[0037] The ethylbenzene dehydrogenation styrene performance of embodiment, comparative example catalyst:
[0038] Table 3 Catalyst ethylbenzene dehydrogenation performance comparison *
[0039]
[0040] * : Catalyst performance is the average value after 200 hours of reaction.
[0041] Table 3 shows that the catalytic performance of the ethylbenzene dehydrogenation styrene catalyst prepared by the present invention is still comparable to that of the catalyst prepared by the previous catalyst preparation method.
[0042] From the description of the examples, the catalyst of the present invention, on the basis of the basic composition of Fe-K-Ce-W, adjusts the ratio of different cerium sources in an ...
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