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Oxide catalyst for dehydrogenating ethyl benzene to prepare styrene

An ethylbenzene dehydrogenation and catalyst technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, hydrocarbons, etc., can solve the problem of poor stability, low styrene selectivity, and catalyst side effects Problems such as more toluene production, to achieve the effect of less by-product toluene

Active Publication Date: 2006-08-02
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
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Problems solved by technology

[0003] The technical problem to be solved by the present invention is the problem that catalyst by-product toluene is many, styrene selectivity is low and stability is poor in prior art

Method used

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  • Oxide catalyst for dehydrogenating ethyl benzene to prepare styrene
  • Oxide catalyst for dehydrogenating ethyl benzene to prepare styrene

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Embodiment 1

[0028]

[0029] composition

[0030]

[0031] composition

[0032] catalyst

[0033]

[0034] Reaction time

[0035] The above examples illustrate that in the Fe-K-Ce-Mo system, zirconium, tin, and at least one oxide combination selected from calcium, manganese, and tungsten are added, and a pore-forming agent and a binder are added to form a desiccant. The hydrogen catalyst has the outstanding advantages of less by-product toluene, high styrene selectivity and good stability, which is beneficial to the factory to increase the output of styrene and increase economic benefits. It is a new type of dehydrogenation catalyst.

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Abstract

The present invention relates to one kind of oxide catalyst for dehydrogenating ethyl benzene to prepare styrene and aims at raising the styrene selectivity and stability of catalyst and reducing toluene as the side product. The technological scheme of the present invention includes adding the combined oxide of Zr, Sn and at least one of Ca, Mn and W into the Fe-K-Ce-Mo catalyst system. The catalyst system may be used in the industrial production of dehydrogenating to produce styrene.

Description

technical field [0001] The invention relates to an oxide catalyst used for dehydrogenating ethylbenzene to prepare styrene. Background technique [0002] Most of the production of styrene in industry is realized by catalytic dehydrogenation of ethylbenzene, and the basic composition of the catalyst used is main catalyst, co-catalyst, porogen, reinforcing agent, etc. The Fe-K-Ce-Mo series catalysts successfully developed in the early 1980s replaced Cr with Ce and Mo, which greatly improved the activity of the catalyst while maintaining the original stability, and were produced by styrene in various countries in the world Manufacturers adopt, such as published U.S. patents 5190906, 4804799, and world patent 09839278A1, but there are also low styrene selectivity and high content of by-products benzene and toluene, which brings difficulties to the main product yield and subsequent separation steps. For example, published US Patent No. 6177602 r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/88B01J23/889C07C5/333C07C15/46
CPCY02P20/52
Inventor 宋磊缪长喜徐永繁邬时海
Owner CHINA PETROLEUM & CHEM CORP
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