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Catalyst for hydrogen oxidation reaction in ethylbenzene dehydrogenation process

A technology for hydrogen oxidation reaction and ethylbenzene dehydrogenation, which is used in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, hydrocarbons, etc., and can solve the problem of insufficient oxygen conversion rate or oxygen selectivity. problem, to achieve the effect of good technical effect

Active Publication Date: 2005-12-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is that the oxygen conversion rate or oxygen selectivity of the hydrogen oxidation reaction catalyst in the ethylbenzene dehydrogenation process is not high enough in the prior art. Catalyst for oxidation reactions

Method used

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  • Catalyst for hydrogen oxidation reaction in ethylbenzene dehydrogenation process
  • Catalyst for hydrogen oxidation reaction in ethylbenzene dehydrogenation process

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Experimental program
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Effect test

Embodiment 1

[0031] The hydrogen oxidation reaction is carried out in a stainless steel reaction tube with an internal diameter of 25 mm, and 30 milliliters of a hydrogen oxidation catalyst is contained inside. The reaction pressure is normal pressure, and the liquid space velocity is 3 hours -1 , The reaction temperature is adjustable from 500 to 650°C. The oil phase after the dehydrogenation reaction in the first reactor of Comparative Example 1, and the added water, oxygen, hydrogen, and nitrogen were used as the hydroxide reactants. The composition of the hydroxide reactants is shown in Table 1.

[0032] raw material

[0033] By measuring the composition of reactants and products, the oxygen conversion and oxygen selectivity of the catalyst in the hydrogen oxidation reaction are calculated.

Embodiment 2

[0035] Take 100 grams of α-alumina particle carrier and impregnate it in 100 milliliters of aqueous solution containing 4.0 grams of chloroplatinic acid, 7.32 grams of zirconyl nitrate, and 8.3 milliliters of hydrochloric acid, dry it at 110°C for 3 hours after taking it out, and treat it with air at 500°C for 2 hours to obtain Catalyst 1.

[0036] Catalyst 1 contained 0.60% by weight Pt and 1.0% by weight zirconium.

[0037] The reaction performance of catalyst 1 was investigated by the method of Example 1, and the reaction performance results at a reaction temperature of 580° C. are shown in Table 2.

Embodiment 3

[0043]Take 100 grams of α-alumina particle carrier and impregnate it in 100 milliliters of aqueous solution containing 24.8 grams of titanium tetrachloride, take it out and dry it at 120°C for 2 hours; then impregnate it in 8.0 grams of chloroplatinic acid, 16 grams of 18.3 grams of zirconyl nitrate and 8.3 milliliters of hydrochloric acid in 100 milliliters of aqueous solution were taken out, dried at 120°C, and treated with air at 450°C for 2 hours to obtain catalyst 3.

[0044] Catalyst 3 contained 1.20% by weight of Pt, 4.0% by weight of Sn, 2.5% by weight of titanium and 2.5% by weight of zirconium.

[0045] The reaction performance of catalyst 3 was investigated by the method of Example 1, and the reaction performance results at a reaction temperature of 580° C. are shown in Table 2.

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Abstract

The invention relates to a hydroxidizing reaction catalyst in the process of ethyl benzene dehydrogenation which mainly resolves the problem of lower oxygen change rate or lower oxygen selectivity of hydroxidizing reaction catalyst in the process of ethyl benzene dehydrogenation. It charges platinum and at least one kind of titanium, zirconium and hafnium on the carrier which can be used in the process of styrene by ethyl benzene dehydrogenation.

Description

technical field [0001] The invention relates to a catalyst for hydrogen oxidation reaction in the dehydrogenation process of ethylbenzene. Background technique [0002] Styrene is a basic organic chemical raw material. Ethylbenzene dehydrogenation process is the most important method to produce styrene. The 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. [0003] Ethylbenzene dehydrogenation-hydrogenation process is a new process that increases hydrogen selective oxidation reaction on the basis of ethylbenzene dehydrogenation, that is to say, the first step is dehydrogenation reaction, and the second step is hydrogen oxidation reaction, tha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/42
CPCY02P20/52
Inventor 卢立义邬时海韩家旺顾国耀程远琳翁漪陈俊任
Owner CHINA PETROLEUM & CHEM CORP
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