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A kind of noble metal catalyst for propane dehydrogenation to propylene and its preparation and application

A noble metal catalyst and propane dehydrogenation technology, applied in catalyst activation/preparation, metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, etc., can solve problems such as low propylene selectivity and high temperature sintering of noble metals

Active Publication Date: 2022-04-12
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The invention discloses a magnesium-gallium composite oxide-supported anti-sintering noble metal catalyst used in the reaction of propane dehydrogenation with high selectivity to generate propylene, which solves the problem of low propylene selectivity of the existing platinum series catalysts for propane dehydrogenation without adding additives and the problem of noble metal catalysts. high temperature sintering problem

Method used

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  • A kind of noble metal catalyst for propane dehydrogenation to propylene and its preparation and application
  • A kind of noble metal catalyst for propane dehydrogenation to propylene and its preparation and application
  • A kind of noble metal catalyst for propane dehydrogenation to propylene and its preparation and application

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Embodiment 1

[0020] Embodiment 1 adopts the method provided by the present invention to prepare magnesium-gallium composite oxide MgO xGa 2 o 3 (x=1). Concrete steps are as follows: (1) take by weighing 0.05 mole of magnesium nitrate hexahydrate and 0.10 mole of gallium nitrate nonahydrate and be dissolved in 500mL water respectively, stir and dissolve, form the magnesium nitrate of 0.10mol / L and the gallium nitrate solution of 0.20mol / L; ( 2) Then add an appropriate amount of 10wt.% ammonia water, adjust the pH value to 9, stir for 12 hours, and filter; (3) Dry the filter cake at 120°C for 12 hours, and then roast it at 600°C for 5 hours to obtain MgO·Ga 2 o 3 Magnesium gallium composite oxide support.

Embodiment 2

[0022] Example 2 Using the method provided by the present invention, the magnesium-gallium composite oxide prepared in Example 1 was used as a carrier to prepare a highly dispersed rhodium catalyst supported by magnesium-gallium composite oxide. The specific method is as follows: Weigh 5.0g MgO·Ga 2 o 3 Add the carrier to 150ml of rhodium chloride aqueous solution containing 0.05g of rhodium, stir at room temperature for 2h, filter, wash, and dry the obtained solid at 150°C for 2 hours, roast it in air at 600°C for 5 hours, and then reduce it in pure hydrogen at 800°C 2h. Obtain a highly dispersed rhodium catalyst supported by magnesium-gallium composite oxide, denoted as Rh / MgO·Ga 2 o 3 .

Embodiment 3

[0024] Example 3 Using the method provided by the present invention, the magnesium-gallium composite oxide-supported highly dispersed iridium catalyst was prepared using the magnesium-gallium composite oxide prepared in Example 1 as a carrier. The specific method is as follows: Weigh 5.0g MgO·Ga 2 o 3 Add the carrier to 150ml of chloroiridic acid aqueous solution containing 0.15g of iridium, stir at room temperature for 24h, filter, wash, and dry the obtained solid at 90°C for 24 hours, roast it in air at 400°C for 12 hours, and then reduce it in pure hydrogen at 600°C 5h. A highly dispersed iridium catalyst supported by magnesium-gallium composite oxide is obtained, denoted as Ir / MgO·Ga 2 o 3 .

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Abstract

The invention belongs to the field of catalysts and their preparation, and relates to a magnesium-gallium composite oxide-supported noble metal catalyst and its preparation and application, in particular to a magnesium-gallium composite oxide-supported noble metal catalyst for propane dehydrogenation to propylene and a preparation method thereof. The catalyst is composed of magnesium gallium composite oxide MgO·xGa 2 o 3 (0.5

Description

technical field [0001] The invention relates to a sintering-resistant noble metal catalyst for generating propene with high selectivity in dehydrogenation of propane, its preparation and application, and a method for preparing propene with high selectivity in propane dehydrogenation using the catalyst. Background technique [0002] Propylene is an important basic chemical raw material in industry, and it is widely used in the production of chemical products such as polypropylene, acrylonitrile, acrylic acid, propylene oxide, and carbonyl alcohol. At present, propylene is produced mainly through three ways: naphtha cracking to ethylene by-product propylene process, methanol to olefins (MTO) process, and propane dehydrogenation (PDH) to propylene process. Among them, propylene is the main by-product of naphtha cracking, and its output accounts for about 80% of the total propylene output. However, this process is not a process with the production of propylene as the target prod...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/62B01J37/03B01J37/08B01J37/02B01J37/18C07C11/06C07C5/333
CPCY02P20/584Y02P20/52
Inventor 李为臻任国庆刘凯鹏杨静怡张涛
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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