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Device for preparing styrene through dehydrogenation and hydro-oxidation of ethylbenzene

A technology for dehydrogenation and hydrogenation of ethylbenzene, which is applied in the fields of hydrocarbons, hydrocarbons, organic chemistry, etc., and can solve problems such as low conversion rate of ethylbenzene

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

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is the problem of low conversion rate of ethylbenzene in the prior art, and a new device for producing styrene by ethylbenzene dehydrogenation and hydrogenation is provided, so that the hydrogen produced in the ethylbenzene dehydrogenation process is large Part of it can be burned to promote the dehydrogenation reaction of ethylbenzene to move to the direction of producing styrene. The device has the advantage of high conversion rate of ethylbenzene

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] The first dehydrogenation reactor, the second dehydrogenation reactor, and the hydrogen oxidation reactor are filled with GS-10 dehydrogenation catalyst, GS-10 dehydrogenation catalyst and SHO-01 hydrogen oxidation catalyst produced by Sinopec Shanghai Petrochemical Research Institute. Under the conditions, the inlet temperature of the three reactors is controlled to be 620°C, the water / ethylbenzene weight ratio is 1.3, and the space velocity is 0.5 hours -1 , Under the condition that the outlet pressure of the hydrogenation reactor is 50kPaA, the ethylbenzene and water vapor are uniformly mixed and then passed through the first-stage and second-stage dehydrogenation reactors and the hydrogenation reactor successively. The reaction product was condensed and then sampled for chromatographic analysis to obtain ethylbenzene conversion and styrene selectivity.

Embodiment 2、3

[0014] The catalyst loading mode and loading amount in the reactor are the same as in Example 1, except that the operating conditions of the reactor are adjusted, see Tables 1 and 2 for details. The reaction effect is shown in Table 3.

Embodiment 4

[0016] Increase one section of hydrogen oxidation reactor, all the other are with embodiment 1, specifically see table 1,2. The reaction effects are also shown in Table 3.

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Abstract

The invention relates to a device for preparing styrene through the dehydrogenation and hydro-oxidation of ethylbenzene and mainly solves the problem that the conversion rate of dehydrogenation reaction of ethylbenzene is low in the prior art. By the technical scheme that at least one hydro-oxidation reactor is arranged behind two ethylbenzene dehydrogenation reactors which are connected in series, the problem is well solved; and the device can be used for the industrial production of the preparation of styrene through the dehydrogenation of ethylbenzene.

Description

technical field [0001] The invention relates to a device for producing styrene from ethylbenzene dehydrogenation and hydrogenation. Background technique [0002] The catalytic dehydrogenation of ethylbenzene to styrene and hydrogen is an equilibrium reaction with endothermic and molecular number increase. Increasing the reaction temperature, reducing the reaction pressure, and using a high-efficiency dehydrogenation catalyst can increase the conversion rate of ethylbenzene, but it is still limited by thermodynamic equilibrium. The ethylbenzene dehydrogenation-hydrogen selective oxidation process is a new process that increases the hydrogen selective oxidation reaction on the basis of ethylbenzene catalytic dehydrogenation. Compared with the ethylbenzene catalytic dehydrogenation process, this process has two main advantages: (1) Since the hydrogen gas of one of the products is consumed by the reaction, it is beneficial for the ethylbenzene dehydrogenation reaction to move t...

Claims

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Application Information

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IPC IPC(8): B01J8/02C07C15/46C07C5/48
Inventor 缪长喜张惠明宋磊陈铜
Owner CHINA PETROLEUM & CHEM CORP