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Hydrogen selective oxidation catalyst used in propane dehydrogenation process and preparation method thereof

An oxidation catalyst, propane dehydrogenation technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve high production costs, large amount of noble metal Pt usage, etc. problems, to achieve high production efficiency, improve reaction stability, improve hydrogen selectivity and oxygen conversion

Active Publication Date: 2018-05-11
NINGBO HAIYUE NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The catalyst prepared by this method has the advantages of better overall performance, but the use of the noble metal Pt is relatively large, and the production cost is relatively high.

Method used

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  • Hydrogen selective oxidation catalyst used in propane dehydrogenation process and preparation method thereof
  • Hydrogen selective oxidation catalyst used in propane dehydrogenation process and preparation method thereof
  • Hydrogen selective oxidation catalyst used in propane dehydrogenation process and preparation method thereof

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Embodiment 1

[0031] The preparation method of the hydrogen selective oxidation catalyst used in the propane dehydrogenation process of the present embodiment comprises the following steps:

[0032] (1) According to the loads of Pd and W are respectively 0.1wt% and 0.2wt% of the total weight of the catalyst, In 2 o 3 with Al 2 o 3 The weight ratio is 0.3:1 meter, take potassium tetrachloropalladate, ammonium tungstate, indium nitrate and aluminum nitrate respectively;

[0033] (2) The indium nitrate and aluminum nitrate taken by weighing are dissolved in the mixed solution of ethylene glycol and water (V 乙二醇 :V 水 =1:2) and stir evenly, add polyethylene glycol octylphenyl ether to the solution, and then add ammonia water to adjust the pH to 8; place the solution in a hydrothermal reaction kettle for hydrothermal reaction at 100°C for 24h, After the reaction is completed, the reaction liquid is cooled to room temperature and then heated until the water is evaporated to dryness, and then ...

Embodiment 2

[0038] The preparation method of the hydrogen selective oxidation catalyst used in the propane dehydrogenation process of the present embodiment comprises the following steps:

[0039] (1) According to the loads of Pd and W respectively being 2.0wt% and 5.0wt% of the total weight of the catalyst, In 2 o 3 with Al 2 o 3 The weight ratio is 0.3:1 meter, take potassium tetrachloropalladate, ammonium tungstate, indium nitrate and aluminum nitrate respectively;

[0040] (2) The indium nitrate and aluminum nitrate taken by weighing are dissolved in the mixed solution of ethylene glycol and water (V 乙二醇 :V 水 =1:4) and stir evenly, add polyethylene glycol octylphenyl ether to the solution, and then add ammonia water to adjust the pH to 10; place the solution in a hydrothermal reaction kettle for hydrothermal reaction at 150°C for 10h, After the reaction is completed, the reaction liquid is cooled to room temperature and then heated until the water is evaporated to dryness, and th...

Embodiment 3

[0045] The preparation method of the hydrogen selective oxidation catalyst used in the propane dehydrogenation process of the present embodiment comprises the following steps:

[0046] (1) According to the loads of Pd and W respectively being 0.1wt% and 5.0wt% of the total weight of the catalyst, In 2 o 3 with Al 2 o 3 The weight ratio is 0.3:1, respectively take potassium tetrachloropalladate, potassium tungstate, indium nitrate and aluminum acetylacetonate;

[0047] (2) The indium nitrate taken and aluminum acetylacetonate are dissolved in the mixed solution of ethylene glycol and water (V 乙二醇 :V 水 =1:3) and stir evenly, add polyethylene glycol octylphenyl ether to the solution, and then add ammonia water to adjust the pH to 9; place the solution in a hydrothermal reaction kettle for hydrothermal reaction at 120°C for 14h, After the reaction is completed, the reaction liquid is cooled to room temperature and then heated until the water is evaporated to dryness, and then...

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Abstract

The invention relates to a hydrogen selective oxidation catalyst used in the process of propane dehydrogenation, which comprises the following components by weight percentage: 0.1-2.0 wt% of Pd or its oxide, 0.2-5.0 wt% of W or its oxide, and The remaining In2O3-Al2O3 composite oxide. This method also relates to the preparation method of the above-mentioned catalyst. The present invention uses relatively cheap Pd instead of Pt as an active component, uses W as an auxiliary agent, and uses a composite oxide of In and Al as a carrier, and is prepared by a combined method of hydrothermal-impregnation. Pd-W / In2O3-Al2O3 catalyst is used, which reduces the preparation cost; W as an auxiliary agent is conducive to the uniform dispersion of the active component Pd on the carrier, and W itself has strong stability, and it is loaded on In2O3-Al2O3 composite oxide The thermal stability and reaction stability of the catalyst are greatly improved; the In2O3-Al2O3 composite oxide is beneficial to uniformly disperse the active components on the composite oxide, and improve the hydrogen selectivity and oxygen conversion rate of the catalyst.

Description

technical field [0001] The invention relates to a hydrogen selective oxidation catalyst used in the propane dehydrogenation process, and also relates to a preparation method of the catalyst. Background technique [0002] Propane dehydrogenation to propylene technology is a process in which propane is used as a raw material and the main product propylene and by-product hydrogen are obtained under the action of a dehydrogenation catalyst. If the hydrogen generated in the reaction process cannot be discharged in time, it will affect the chemical reaction balance and cause the single-pass conversion rate of propane to decrease. In addition, since propane dehydrogenation is a strong endothermic reaction, if the by-product hydrogen can be selectively burned, it can not only reduce the external heat supply but also promote the balanced movement of the reaction, thereby increasing the conversion rate of propane and the yield of propylene. In the reaction process, how to minimize th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/652C07C5/48C07C11/06
CPCY02P20/52
Inventor 张国甫邓生鑫
Owner NINGBO HAIYUE NEW MATERIAL