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Method for preparing superhigh metal load capacity hydrogenation catalyst

A technology of hydrogenation catalyst and loading capacity, which is applied in the field of preparation of ultra-high metal loading hydrogenation catalyst, and can solve problems such as clogging, reduced catalyst activity, and decreased specific surface area of ​​the catalyst

Active Publication Date: 2017-03-08
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But limited by the carrier γ-Al 2 o 3 Due to the limitation of pore volume and particle packing density, the hydrogenation catalyst prepared by metal solution impregnation method has better pore structure and larger specific surface area, but the loading of active metal is about 25-35wt%; When the load is increased, the active metal will block the pores of the catalyst, thereby reducing the specific surface area of ​​the catalyst and reducing the activity of the catalyst.

Method used

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  • Method for preparing superhigh metal load capacity hydrogenation catalyst
  • Method for preparing superhigh metal load capacity hydrogenation catalyst
  • Method for preparing superhigh metal load capacity hydrogenation catalyst

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preparation example Construction

[0019] figure 1 It is a flow chart of the preparation method of the metal loading hydrogenation catalyst in the embodiment of the present invention, such as figure 1 Shown, the preparation method of the metal-loaded hydrogenation catalyst provided by the invention comprises the following steps:

[0020] S101: Depositing an aluminum source modifier on a carrier. Wherein, the aluminum source modifier is a composition of one or more of aluminum isopropoxide, aluminum chloride and aluminum nitrate; the carrier is a silica carrier, and the Si / Al atomic ratio is 5-25.

[0021] S102: Mixing the metal, the organic complexing agent and deionized water. Among them, the metal includes the main component and the auxiliary component; the main component is Mo and W of the VIB group, and the auxiliary component is Co and / or Ni of the VIII group; the aluminum source modifier is aluminum isopropoxide, chlorine Composition of one or more of aluminum chloride and aluminum nitrate; Ni(Co) / (M...

Embodiment 1

[0029] Weigh 50g of large pore volume SiO 2 Put it in a beaker, add 500ml of n-hexane, then weigh 11.3g of aluminum isopropoxide, Si / Al=15, dissolve it with a small amount of n-hexane under stirring and add it to the beaker; then add 1500ml of n-hexane, and continue stirring at room temperature 24 hours. Filter, wash with a large amount of n-hexane, dry at 127°C for 8 hours, and then heat up to 580°C at a rate of 2°C / min and calcinate for 6 hours to obtain an aluminum source-modified silica carrier, which is designated as S-1.

[0030] Weigh 50g of large pore volume SiO 2 Put it in a beaker, add 500ml of absolute ethanol, then weigh 7.4g of anhydrous aluminum chloride, Si / Al=5, dissolve it with a small amount of absolute ethanol under stirring and add it to the beaker; then add 1500ml of absolute ethanol, Stirring was continued at room temperature for 24 hours. Filter, wash with a large amount of absolute ethanol, dry at 127°C for 8 hours, and then heat up to 580°C at a rat...

Embodiment 2

[0034] The water absorption rate of measuring carrier S-1 is 1.8ml / g, takes by weighing the silicon dioxide carrier S-1 of 100g aluminum source modification, 110.7g nickel nitrate (Ni(NO 3 ) 2 ·6H 2 O), 33.6g ammonium molybdate ((NH 4 ) 6 Mo 7 o 24 4H 2 O), 46.9g ammonium metatungstate ((NH 4 ) 6 h 2 W 12 o 40 ·XH 2 O) and 53.4g citric acid (C 6 h 8 o 7 ·H 2 O). Dissolve nickel nitrate with an appropriate amount of water first, add citric acid until completely dissolved, then add ammonium molybdate and ammonium metatungstate, continue stirring at 60°C until completely dissolved to form a NiMoW co-impregnation solution, and finally make the solution volume up to 200ml. The catalyst was prepared by an equal-volume impregnation method. After the impregnation, it was dried at 100°C for 6 hours, calcined at 450°C for 4 hours, and the heating rate was 2°C / min to obtain catalyst A1. The constant volume V satisfies V=θm; where, θ is the water absorption rate of the ca...

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Abstract

The invention relates to a method for preparing a superhigh metal load capacity hydrogenation catalyst. The method comprises the following steps: depositing an aluminum source modifier on a carrier; metal, an organic complexing agent and deionized water are mixed; the mixed product is dipped on a carrier deposited with the aluminum source modifier; the carrier dipped with the mixed product is dried and roasted; wherein, the main metal components are Mo and W of VIB family, the auxiliary agent components are Co and / or Ni of VIII family; the aluminum source modifier is one or combination of aluminum isopropoxide, aluminum chloride and aluminum nitrate; the pore volume of the carrier deposited with the aluminum source modifier is 1.5-3.0 ml / g, the specific surface area is 400-800 m<2> / g, and the aperture proportion of the aperture with 15-20 nm is greater than 50%. According to the preparation method of the invention, catalyst activity is obviously increased by increasing the metal load capacity, the catalyst has a good pore structure and a large specific surface area; preparation flow of the catalyst is simplified, and the preparation cost of the hydrogenation catalyst with high metal content is reduced.

Description

technical field [0001] The invention relates to the technical field of petrochemical industry, in particular to a method for preparing a hydrogenation catalyst with an ultra-high metal loading capacity. Background technique [0002] In recent years, with people's increasing attention to environmental quality and the improvement of environmental protection awareness, higher requirements have been put forward for the production of vehicle fuels, especially vehicle diesel sulfur content and cetane number. National V and National The quality index of VI diesel oil requires ultra-low sulfur content (<10μg / g) in vehicle diesel. The cetane number of national V and national VI standard vehicle diesel should be greater than 51 and 53 respectively. To increase the cetane value of diesel Values ​​require deep hydrodearomatics. Currently, the hydrogenation process is the most effective way to achieve this goal, and high-performance hydrogenation catalysts are the key. [0003] The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/888B01J21/12B01J32/00B01J35/10C10G45/50C10G45/08
CPCC10G45/08C10G45/50B01J23/002B01J23/8885B01J2523/00C10G2300/308C10G2300/307C10G2300/202C10G2300/1059C10G2300/1055B01J35/615B01J35/617B01J35/638B01J2523/31B01J2523/41B01J2523/68B01J2523/69B01J2523/845B01J2523/847
Inventor 柴永明郭阳刘宾董斌刘晨光殷长龙张孔远李奕川谢坤左萌赵晋翀
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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