Propane dehydrogenation catalyst, and preparation method and application thereof

A technology for propane dehydrogenation and catalyst, which is applied to catalysts, carbon compound catalysts, chemical instruments and methods, etc., can solve problems such as reducing the content of Pt, and achieve the effects of improving olefin selectivity, favorable for dispersion and high thermal stability.

Pending Publication Date: 2018-05-11
YINGKOU XIANGYANG CATALYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, domestic research on propane dehydrogenation catalysts mainly focuses on the optimization of Pt-based catalysts. The Pt content of

Method used

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  • Propane dehydrogenation catalyst, and preparation method and application thereof
  • Propane dehydrogenation catalyst, and preparation method and application thereof
  • Propane dehydrogenation catalyst, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0035] Example 1

[0036] Weigh 4.0g and crush it to 20-40 mesh θ-Al 2 O 3 Carrier particles (20-40 mesh particles, pore volume 0.49cm 3 / g, specific surface area 81m 2 / g, the following examples and comparative examples all use this carrier), immersed in an equal volume at 60 ° C containing a certain amount of H 2 PtCl 6 dipped in the aqueous solution of the 2 O 3 vector.

[0037] Theta-Al with 0.01% Pt loading 2 O 3 The carrier with In(NO 3 ) 3 , Ga(NO 3 ) 3 The aqueous solution was mixed and immersed for 2h, dried at 100°C for 6h, and then calcined at 600°C for 6h in a muffle furnace. 2 The catalyst was obtained by reduction for 2h. The loading amount of each component in the catalyst in terms of alumina carrier is: Pt 0.01wt%, In 0.25wt%, Ga 1.0wt%, the obtained catalyst is denoted as Cat-1.

[0038] Evaluation conditions: the mass of the catalyst is 0.25g, and the mass space velocity of propane is 4h -1 , the hydrogen-hydrocarbon ratio is 0.5, the reaction...

Example Embodiment

[0039] Example 2

[0040] Weigh 4.0g and crush it to 20-40 mesh θ-Al 2 O 3 Carrier particles (20-40 mesh particles, pore volume 0.49cm 3 / g, specific surface area 81m 2 / g, the following examples and comparative examples use this carrier), immersed in an equal volume at 60°C containing a certain amount of KNO 3 In aqueous solution, immersed for 2 h, dried at 100 °C for 6 h, and then calcined in a muffle furnace at 500 °C for 4 h to obtain θ-Al with a loading of 0.5% K 2 O 3 vector.

[0041] The 0.5% K loading of θ-Al 2 O 3 carrier with H 2 PtCl 6 , In(NO 3 ) 3 , Ga(NO 3 ) 3 The aqueous solution was mixed and immersed for 2h, dried at 100°C for 6h, and then calcined at 600°C for 6h in a muffle furnace. 2 The catalyst was obtained by reduction for 2h. The loading amount of each component in the catalyst, calculated on the alumina carrier, was: Pt 0.03wt%, K 0.5wt%, Ga 1.0wt%, In0.25wt%, and the obtained catalyst was denoted as Cat-2.

Example Embodiment

[0042] Example 3

[0043] Weigh 4.0g of θ-Al 2 O 3 Carrier, immersed in 20mL of a certain amount of KNO at 60°C 3 In aqueous solution, immersed for 2 h, dried at 100 °C for 6 h, and then calcined in a muffle furnace at 500 °C for 4 h to obtain θ-Al with a loading of 0.5% K 2 O 3 vector.

[0044] The 0.5% K loading of θ-Al 2 O 3 carrier with H 2 PtCl 6 , In(NO 3 ) 3 The same volume of aqueous solution was immersed for 2h, dried at 100°C for 6h, and then calcined in a muffle furnace at 600°C for 6h, and heated at 600°C for 6 hours. 2 The catalyst was obtained by reduction in medium for 2h. The loading amount of each component in the catalyst in terms of alumina carrier is: Pt 0.03wt%, K 0.5wt%, In 0.25wt%, and the obtained catalyst is denoted as Cat-3.

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Abstract

The invention discloses a propane dehydrogenation catalyst, and a preparation method and an application thereof. The propane dehydrogenation catalyst adopts theta-Al2O3 as a carrier, metal componentsare supported on the carrier, Pt and In in the metal components are necessary components, K and/or Ga are/is supported or not supported on the carrier as an assistant, Pt (by elemental Pt) accounts for 0.005-0.2% of the weight of the theta-Al2O3 carrier, In (by elemental In) accounts for 0.1-2.0% of the weight of the theta-Al2O3 carrier, K (by elemental K) accounts for 0-2.0% of the weight of thetheta-Al2O3 carrier, and Ga (by elemental Ga) accounts for 0-2.0% of the weight of the theta-Al2O3 carrier. The catalyst is prepared through a stepwise impregnation or co-impregnation technology. Thepropane dehydrogenation catalyst prepared through the method has a good propane dehydrogenation reaction performance; and compared with traditional Pt-based propane dehydrogenation catalysts, the catalyst in the invention has the advantages of great reduction of the load capacity of the precious metal Pt, and great reduction of the production cost.

Description

technical field [0001] The invention belongs to the field of catalysts and preparation thereof, in particular to a θ-Al 2 o 3 It is a propane dehydrogenation catalyst with low Pt loading and its preparation method and application. Background technique [0002] Propylene is a very important basic chemical raw material, which can be used to produce chemical raw materials such as polypropylene, acrylonitrile, phenol and propylene oxide, and its demand has increased significantly in recent years. However, the production capacity of conventional steam cracking and FCC technologies cannot meet the rapidly growing demand for propylene, and new propylene production technologies are urgently needed. In recent years, the technology of propane dehydrogenation to propylene has received more and more attention and has achieved great development. [0003] The catalytic dehydrogenation reaction of propane is thermodynamically a reversible reaction with endothermic and molecular number i...

Claims

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Application Information

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IPC IPC(8): B01J23/62C07C5/333C07C11/06
CPCB01J23/62C07C5/3337C07C2523/62C07C11/06Y02P20/52
Inventor 孙承林时宇荣欣李先如
Owner YINGKOU XIANGYANG CATALYST
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