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Catalyst for hydroxide reaction

A technology for hydrogen oxidation reaction and catalyst, applied in metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, hydrocarbon and other directions, can solve the problem of insufficient oxygen conversion rate or oxygen selectivity, etc. The effect of good technical effect

Active Publication Date: 2006-03-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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, and a new hydrogen oxidation reaction catalyst is provided

Method used

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  • Catalyst for hydroxide reaction
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Examples

Experimental program
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Effect test

Embodiment 1

[0036] The separate hydrogen oxidation reaction is carried out in a stainless steel reaction tube with an inner diameter of 25.4 mm, which contains 30 ml of a hydrogen oxidation catalyst. The reaction pressure is normal pressure, and the liquid phase space velocity is 3 hours -1, The reaction temperature is adjustable from 500 to 650℃. 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 reactant is shown in Table 1.

[0037] Raw materials

[0038] By measuring the composition of reactants and products, the oxygen conversion rate and oxygen selectivity of the catalyst in the hydrogenation reaction are calculated.

Embodiment 2

[0040] Put 1000 g of alumina monohydrate in the kneader, add 4 g of calcium silicate, 0.5 g of ammonium fluoride, 3 ml of concentrated nitric acid, and 260 ml of deionized water. Fully knead and extrude into a cylindrical shape with a diameter of 4 mm. Dry at 120°C and calcined at 1200°C for 4 hours to obtain α-alumina carrier A.

[0041] Take 100 g of the above-mentioned carrier A and immerse it in 100 ml of aqueous solution containing 3.3 g of chloroplatinic acid and 8.3 ml of concentrated hydrochloric acid, take it out and dry it at 120°C for 2 hours, and treat it in air at 600°C for 1 hour to obtain catalyst 1.

[0042] The catalyst 1 contained 0.5% by weight of Pt.

[0043] The physical and chemical properties of catalyst 1 are shown in Table 2. The reaction performance of catalyst 1 was investigated by the method of Example 1. The reaction performance results at the reaction temperature of 580° C. are shown in Table 3.

Embodiment 3

[0050] Put 1000 g of alumina monohydrate in a kneader, add 4 g of calcium silicate, 5 g of ammonium fluoride, 3 ml of concentrated nitric acid, and 260 ml of deionized water. Fully knead and extrude into a cylindrical shape with a diameter of 4 mm. Dry at 120°C and calcined at 1400°C for 4 hours to obtain α-alumina carrier C.

[0051] Take 100 g of the above carrier B and immerse it in 100 ml of aqueous solution containing 24.3 g of stannous chloride and 8.3 ml of concentrated hydrochloric acid, take it out and dry at 120°C for 2 hours; then immerse it in a solution containing 13.2 g of chloroplatinic acid and 8.3 ml of concentrated hydrochloric acid. Take it out and dry it in 100 ml of aqueous solution, and air-treat at 250°C for 3 hours to obtain catalyst 3.

[0052] Catalyst 3 contained 2.0% by weight of Pt and 6.0% by weight of Sn.

[0053] The physical and chemical properties of catalyst 3 are shown in Table 2. The reaction performance of the catalyst 3 was investigated by th...

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Abstract

A hydroxidizing catalyst for preparing styrene by dehydrogenating ethylbenzene features that the F-contained compound is added to its carrier. Its advantage is high conversion rate and selectivity of O2.

Description

Technical field [0001] The present invention relates to a catalyst for hydrogenation reaction, in particular to a catalyst for hydrogenation in the dehydrogenation of ethylbenzene. Background technique [0002] Styrene is a basic organic chemical raw material. The ethylbenzene dehydrogenation process is the most important method for producing styrene. The dehydrogenation of ethylbenzene to styrene and hydrogen is an endothermic, equilibrium reaction with an increase in the number of molecules. Increasing the reaction temperature, lowering the reaction pressure, and using a high-efficiency dehydrogenation catalyst can increase the single-pass conversion of ethylbenzene, but it is still limited by the thermodynamic balance. [0003] Ethylbenzene dehydrogenation-hydroxide process is a new process that adds hydrogen selective oxidation reaction on the basis of ethylbenzene dehydrogenation. That is to say, the first step is dehydrogenation reaction, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/13B01J27/12B01J23/42C07C5/48
Inventor 卢立义顾国耀程远琳韩家旺
Owner CHINA PETROLEUM & CHEM CORP
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