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Method for ethylbenzene dehydrogenation reaction in CO2 atmosphere

A technology for the dehydrogenation and reaction of ethylbenzene, which is applied in the direction of chemical instruments and methods, hydrocarbons, hydrocarbons, etc., can solve the problems of high energy consumption, high dehydrogenation reaction temperature, and large steam consumption, and achieve energy consumption low temperature, low reaction temperature and low steam consumption

Inactive Publication Date: 2013-05-29
CHINA PETROLEUM & CHEM CORP +1
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  • Description
  • Claims
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Problems solved by technology

[0005] 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 under the water vapor atmosphere existing in the prior art

Method used

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  • Method for ethylbenzene dehydrogenation reaction in CO2 atmosphere

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] 80mg V 2 o 5 A loading of 10.68wt% of 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 .

Embodiment 2

[0017] With a V loading of 10.68wt% V 2 o 5 / MCF is a catalyzer, investigates the change of the reaction effect when the reaction temperature is 500 DEG C, and all the other process conditions are the same as in Example 1.

Embodiment 3

[0019] with V 2 o 5 A loading of 10.68wt% of V 2 o 5 / MCF as catalyst, investigate CO 2 The change of the reaction effect when the partial pressure is 28kPaA, CO 2 Partial pressure changes by adjusting the CO in the feed gas 2 and N 2 Realize by the ratio, and keep ethylbenzene partial pressure, total flow and other reaction conditions are the same as embodiment 1.

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Abstract

The invention relates to a method for ethylbenzene dehydrogenation reaction in a CO2 atmosphere and mainly aims to solve the problems of dehydrogenation reaction in a steam atmosphere in the prior art, such as high temperature, high steam consumption and high energy consumption. The problems are better solved by using the technical scheme as follows: dehydrogenation reaction is carried out under the action of V2O5 / MCF serving as a catalyst in the presence of CO2 instead of steam under the conditions that the reaction temperature ranges from 450 DEG C to 600 DEG C and the CO2 partial pressure ranges from 0.0kPa to 28.0kPa. The method can be used for industrial production of ethylbenzene dehydrogenation.

Description

technical field [0001] The present invention relates to a CO 2 Ethylbenzene dehydrogenation reaction method under atmosphere. 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 selecti...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C15/46C07C5/333B01J29/03
CPCY02P20/52
Inventor 缪长喜顾松园华伟明乐英红高滋
Owner CHINA PETROLEUM & CHEM CORP