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Catalyst for preparing styrene through ethylbenzene dehydrogenation and preparation method of catalyst

An ethylbenzene dehydrogenation production and catalyst technology, 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 utilization and low catalyst reaction activity And other issues

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

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Problems solved by technology

[0004] One of the technical problems to be solved by the present invention is that the effective outer surface of the catalyst in the prior art is not fully utilized, and the resistance of the catalyst bed is reduced, resulting in low catalyst reactivity. Ethylene catalyst

Method used

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  • Catalyst for preparing styrene through ethylbenzene dehydrogenation and preparation method of catalyst
  • Catalyst for preparing styrene through ethylbenzene dehydrogenation and preparation method of catalyst
  • Catalyst for preparing styrene through ethylbenzene dehydrogenation and preparation method of catalyst

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Experimental program
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Embodiment 1～9

[0032] The physical properties of the catalyst prepared by extruding, pelletizing, drying, and roasting the wet-kneaded paste block prepared by the same components and the same method as in the comparative example are shown in Table 1 :

[0033] Table 1 The physical properties of the four-leaf catalyst

[0034]

[0035] Respectively with comparative example in table 2, embodiment catalyst take pure ethylbenzene as raw material ethylbenzene dehydrogenation styrene performance see table 2:

[0036] Table 2 Catalyst ethylbenzene dehydrogenation performance comparison *

[0037]

[0038] * : Catalyst performance is the average value of 200 hours after the reaction is stable.

[0039] Select several embodiment, the life-span of the ethylbenzene dehydrogenation styrene reaction of comparative example catalyst is shown in Table 3:

[0040] Table 3 The performance comparison of different embodiment catalysts represented by styrene per pass yield in the ethylbenzene dehydrog...

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Abstract

The invention relates to a catalyst for preparing styrene through ethylbenzene dehydrogenation and a preparation method of the catalyst and mainly solves the problems that in the prior art, the utilization of the effective outer surface of the catalyst is not full, and the catalyst reaction activity is low because of high resistance drop of a catalyst bed layer. In a Fe-K-Ce-Mo (W)-Mg-Ca basic catalyst system, the forming technology is utilized for producing quatrefoil striped catalysts. Through the technical scheme, the problems are perfectly solved, and the catalyst can be used in the industrial production of styrene.

Description

technical field [0001] The invention relates to a 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 early 1980s, such...

Claims

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Application Information

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IPC IPC(8): B01J23/887B01J23/888B01J35/10C07C15/46C07C5/333
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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