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Supported platinum group catalyst applied to propane dehydrogenation propylene preparation and preparation method of supported platinum group catalyst

A platinum-based catalyst and propane dehydrogenation technology, applied in the field of propylene, can solve the problems of high energy consumption, long preparation process, increase the difficulty of separation and purification, etc., and achieve the effects of high reaction activity, slow activity decline, and high regeneration stability.

Inactive Publication Date: 2016-01-20
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the four components of the catalyst are all loaded on the alumina carrier by the equal volume impregnation method, the preparation process is long and the energy consumption is large; in addition, since the reaction raw material gas is added with nitrogen as a diluent gas, the subsequent separation and purification costs are increased. difficulty

Method used

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  • Supported platinum group catalyst applied to propane dehydrogenation propylene preparation and preparation method of supported platinum group catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038](1) Weigh 100g of pseudo-boehmite, add 100g of an aqueous solution containing 9.2967g of cerium nitrate hexahydrate and mix evenly, and follow the rolling ball molding method to obtain spherical particles with a particle size of 1.4-1.5mm. Place it in an oven at 120°C for 6 hours and then bake it at 750°C for 4 hours to obtain the propane dehydrogenation catalyst carrier Ce-Al of the present invention 2 o 3 .

[0039] (2) the preparation method of next catalyst is with step (2) and (3) in comparative example, makes propane dehydrogenation supported catalyst PtSn-K / Ce-Al of the present invention 2 o 3 .

[0040] The obtained catalyst is denoted as M-1-T, and the percentages of its components are: Ce: 3%, Pt: 0.4%, Sn: 0.8%, K: 1.5%, and the balance is Al 2 o 3 .

Embodiment 2

[0045] (1) Weigh 100g of pseudo-boehmite, add 100g of an aqueous solution containing 9.3525g of lanthanum nitrate hexahydrate and mix evenly, and follow the rolling ball forming method to obtain spherical particles with a particle size of 1.4-1.5mm. Place it in an oven at 120°C for 6 hours and then bake it at 750°C for 4 hours to obtain the propane dehydrogenation catalyst carrier La-Al of the present invention 2 o 3 .

[0046] (2) the preparation method of next catalyst is with step (2) and (3) in comparative example 1, obtains propane dehydrogenation supported catalyst PtSn-K / La-Al among the present invention 2 o 3 .

[0047] The obtained catalyst is denoted as M-2, and the percentages of its components are: La: 3%, Pt: 0.4%, Sn: 0.8%, K: 1.5%, and the balance is Al 2 o 3 .

Embodiment 3

[0049] (1) Weigh 100g of pseudo-boehmite, add 100g of an aqueous solution containing 9.2967g of cerium nitrate hexahydrate and mix evenly, and follow the rolling ball molding method to obtain spherical particles with a particle size of 1.4-1.5mm. Place it in an oven at 120°C for 6 hours and then bake it at 600°C for 4 hours to obtain the propane dehydrogenation catalyst carrier Ce-Al of the present invention 2 o 3 .

[0050] (2) the preparation method of next catalyst is with step (2) and (3) in comparative example 1, makes propane dehydrogenation supported catalyst PtSn-K / Ce-Al of the present invention 2 o 3 .

[0051] The obtained catalyst is denoted as M1-T1, and the percentages of its components are: Ce: 3%, Pt: 0.4%, Sn: 0.8%, K: 1.5%, and the balance is Al 2 o 3 .

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Abstract

The invention provides a supported platinum group catalyst applied to propane dehydrogenation propylene preparation and a preparation method of the supported platinum group catalyst and relates to propylene. The catalyst is prepared from PtSnN2 / N1-Al2O3, wherein N1 is selected from rare earth metals of La and Ce, and N2 is selected from alkali metals of Cs, K and Na. The catalyst is prepared from, by mass, 0.1%-0.5% of Pt, 0.2%-1.0% of Sn, 0.5%-6% of N1, 0.5%-5% of N and the balance Al2O3. The preparation method includes the steps that a cerous nitrate solution or a lanthanum nitrate solution containing the N1 component is added in the preparation process or forming process of an alumina precursor, and a modified carrier of the propane dehydrogenation propylene preparation catalyst is prepared after drying and calcination; Pt and Sn are co-steeped or steeped on the carrier step by step, the catalyst precursor PtSn / N1-Al2O3 is obtained after drying and calcination and then steeped in an N2 component solution, and the catalyst is prepared after drying and calcination.

Description

technical field [0001] The invention relates to propylene, in particular to a supported platinum series catalyst applied to propane dehydrogenation to propylene and a preparation method thereof. Background technique [0002] Propylene is one of the important basic organic raw materials in petrochemical industry, mainly used in the production of downstream products such as polypropylene, acrylonitrile, propylene oxide, acrylic acid, butanol, octanol, cumene and isopropionic acid. The demand for propylene shows a steady growth trend. At present, the supply of propylene mainly comes from the production of ethylene from naphtha cracking and the by-products produced in the catalytic cracking process of petroleum. Due to the influence of factors such as oil supply and the lightening of catalytic cracking feed, the production of propylene has decreased, which has increased the gap of propylene. It cannot meet the market demand for propylene in the world today. Therefore, the deve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/63C07C5/333C07C11/06
CPCY02P20/52
Inventor 伊晓东刘香华陈洲赖伟坤方维平
Owner XIAMEN UNIV
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