Catalyst for preparing styrene by ethylbenzene dehydrogenation and preparing method thereof

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 problem of low compressive strength of catalysts and catalyst bed Problems such as high resistance drop and poor anti-powdering performance

Inactive Publication Date: 2013-04-10
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] One of the technical problems to be solved by the present invention is that in the prior art, the low compressive strength of the catalyst and the poor anti-powdering performance lead to a high catalyst bed resistance and a low catalyst reactivity. Heteromorphic Catalyst for Dehydrogenation of Benzene to Styrene

Method used

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  • Catalyst for preparing styrene by ethylbenzene dehydrogenation and preparing method thereof
  • Catalyst for preparing styrene by ethylbenzene dehydrogenation and preparing method thereof
  • Catalyst for preparing styrene by ethylbenzene dehydrogenation and preparing method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1～8

[0036] 290.8 grams of red iron oxide, 76.3 grams of potassium carbonate, 6.5 grams of cerium oxide, 67.5 grams of persimmon nitrate, 6.5 grams of ammonium molybdate and 15.0 grams of carboxymethyl cellulose (see Table 1) were stirred in a kneader for 1 hour, and the Add water, stir for another half an hour, take out the extruded strips, extrude them into cylindrical strips 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, then place them in a muffle furnace, and bake them at 850°C Catalyst was produced in 4 hours. Embodiment 2, embodiment 3, embodiment 4, embodiment 5, embodiment 6, embodiment 7, the preparation method of embodiment 8 are the same as embodiment 1, just add different proportions.

[0037] Table 1 Fe-K-Ce-Mo catalysts with different proportions of porogens and composition Fe-K-Ce-Mo catalyst preparation dosage and physical properties

[0038]

[0039] * : The percentage of the difference between the accurately w...

Embodiment 9～17

[0042]Extrude the wet-kneaded paste blocks with the same components as in Example 5 on extruders equipped with different shapes of flower boards and different propulsion processes to make straight lines, threads or rings with different widths, depths, and shapes on the axial outer surface. The strip of shape flute, then pelletize, dry, the physical performance of the prepared catalyst of roasting is shown in Table 2:

[0043] Table 2 Physical properties of different fluted catalysts

[0044]

[0045] It can be seen from the table that the axial thread or annular groove on the outer surface of the catalyst is equivalent to the linear groove in terms of compressive strength and specific surface area, but the wear resistance is obviously improved.

[0046] Respectively with the embodiment in table 1,2, comparative example catalyst take pure ethylbenzene as raw material ethylbenzene dehydrogenation styrene performance see table 3:

[0047] Table 3 Catalyst ethylbenzene dehydro...

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Abstract

The invention relates to a catalyst for preparing styrene by ethylbenzene dehydrogenation and a preparing method thereof, which aims at solving the problems of the prior art that the bed resistance drop of the catalyst is high due to low compressive strength and poor chalk resistance performance, and the reaction activity of the catalyst is low. Aiming at well solving the problems, the catalyst and the method adopt the technical scheme that a catalyzing system containing Fe-K-Ce-Mo(W) is adopted, and a catalyst of which the axial periphery is provided with a spiral pattern or a circular groove pattern different in width, depth and shape is produced. The catalyst and the method can be used for the industrial production of the styrene.

Description

technical field [0001] The invention relates to a special-shaped catalyst for preparing styrene from ethylbenzene dehydrogenation and a preparation method thereof. Background technique [0002] At present, the vast majority of styrene in industry is realized by direct catalytic thermal dehydrogenation of ethylbenzene. The basic composition of the catalyst used includes main catalyst, co-catalyst, porogen, reinforcing agent and so on. Reports on catalysts can generally be divided into two categories, one is the early Fe-K catalysts containing Cr, such as published US patents US4467046, US4684619 and European patent EP0195252A2. Although this type of catalyst has good activity and stability, due to the existence of more or less Cr oxides in the composition, the preparation, operation and waste catalyst treatment of the catalyst will cause certain environmental pollution, and it has been gradually eliminated. The other is the Fe-K-Ce-Mo series successfully developed in the ea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/887B01J23/888B01J35/10C07C15/46C07C5/333C07C15/44
CPCY02P20/52
Inventor 陈铜倪军平范勤刘剑峰缪长喜
Owner CHINA PETROLEUM & CHEM CORP
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