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Ethylbenzene dehydrogenation method in presence of mild oxidant

A technology of ethylbenzene dehydrogenation and catalyst, applied in chemical instruments and methods, molecular sieve catalysts, physical/chemical process catalysts, etc., can solve the problems of large steam consumption, high dehydrogenation reaction temperature, and high energy consumption

Inactive Publication Date: 2013-05-29
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is the problems of high dehydrogenation reaction temperature, large steam consumption, and high energy consumption in the prior art under the water vapor atmosphere, and a method for ethylbenzene dehydrogenation in the presence of a mild oxidant is provided

Method used

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  • Ethylbenzene dehydrogenation method in presence of mild oxidant

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Embodiment 1

[0019] 80mg V 2 o 5 A loading of 3.56wt% V 2 o 5 / MCF catalyst was loaded into a stainless steel reactor with a diameter of 5mm, the temperature was programmed to 550°C, the heating rate was 20°C / min, and the reaction temperature was 550°C. Before the reaction, the catalyst was activated in a nitrogen atmosphere at 550°C for 2h. Make N 2 with CO 2 The mixed gas will bring ethylbenzene into the reactor through the ethylbenzene saturated steam generator at 15°C, N 2 , CO 2 The molar ratio to ethylbenzene is 120:20:1, and the total gas flow rate is 60ml min -1 . The composition and reaction conditions of the catalyst are shown in Table 1, and the performance of the catalyst under all conditions is shown in Table 2.

Embodiment 2、3、4

[0021] The amount of catalyst remains the same, only the V in the catalyst 2 o 5 The loads were adjusted to 7.12, 10.68 and 14.24wt%, and the rest were the same as in Example 1. The composition and reaction conditions of the catalyst are shown in Table 1, and the performance of the catalyst under all conditions is shown in Table 2.

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Abstract

The invention relates to an ethylbenzene dehydrogenation method in the presence of a mild oxidant, which is mainly used for solving the problems that the dehydrogenation reaction temperature is high, the steam consumption is large and the energy consumption is high under the water vapor atmosphere in the prior art. The technical scheme of the ethylbenzene dehydrogenation method under the carbon dioxide atmosphere is as follows: the catalyst comprises the following components in parts by weight: 0.1-30.0 parts of active components in terms of V2O5 and 55.0-98.0 parts of a catalyst carrier, wherein the catalyst carrier is selected from MCF (Monolithic Crystal Filter) molecular sieve. The ethylbenzene dehydrogenation method can be used for solving the difficult problems well and can be used for the industrial production.

Description

technical field [0001] The invention relates to a method for dehydrogenating ethylbenzene in the presence of a mild oxidant. Background technique [0002] Styrene is an important basic organic raw material widely used in the production of plastics, resins and synthetic rubber. [0003] At present, a large amount of water vapor is used as a dehydrogenation medium in the styrene production process, and the water vapor / ethylbenzene molar ratio is between 8-10. Today, with the soaring world energy prices, high energy consumption has become a bottleneck restricting the healthy development of the styrene industry , the development of new energy-saving technology for styrene production has become the general trend. [0004] The latest report by Sato et al. is using CO instead of water vapor 2 The effect of carrying out the dehydrogenation reaction of ethylbenzene, with Na 2 Al promoted by O 2 o 3 As a catalyst, the conversion rate of ethylbenzene reaches 70%, and the selectivi...

Claims

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Application Information

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IPC IPC(8): C07C15/46C07C5/42B01J29/03
Inventor 华伟明乐英红高滋缪长喜陈铜宋磊
Owner CHINA PETROLEUM & CHEM CORP
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