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Preparation method of high-metal-content hydrogenation catalyst

A hydrogenation catalyst, high-metal technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, chemical instrument and method, hydrogenation refining of aromatics, etc., can solve the problem of catalyst specific surface area decrease, catalyst activity decrease, blockage problems such as improving catalyst activity, reducing preparation cost, and simplifying the preparation process

Active Publication Date: 2017-02-22
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • 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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  • Preparation method of high-metal-content hydrogenation catalyst
  • Preparation method of high-metal-content hydrogenation catalyst
  • Preparation method of high-metal-content hydrogenation catalyst

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preparation example Construction

[0020] figure 1 It is a flow chart of the preparation method of the high metal content hydrogenation catalyst in the embodiment of the present invention, such as figure 1 Shown, the preparation method of the high metal content hydrogenation catalyst provided by the invention comprises the following steps:

[0021] 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.

[0022] S102: mixing metal, phosphoric acid, organic complexing agent and deionized water. Among them, the metal includes a main component and an auxiliary component; the main component is Mo of the VIB group, and the auxiliary component is Ni of the VIII group; the atomic ratio of Ni / (Ni+Mo) is 0.23-0.30, and the P / Mo The mass ratio of Ni / organic complexing agent is 0.04-0.09, and the molar ratio of N...

Embodiment 1

[0030] 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 120°C for 6h, and then heat up to 550°C at a rate of 2°C / min and calcined for 4h to obtain an aluminum source-modified silica carrier, which is designated as S-1.

[0031] 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 120°C for 6 hours, and then heat up to 550°C at a rate of 2°C / mi...

Embodiment 2

[0035] Measure the water absorption rate of carrier S-1 to 1.8ml / g, weigh 100g aluminum source modified silica carrier S-1, 91.7g molybdenum trioxide, 28.3g basic nickel carbonate, 24.4g concentrated phosphoric acid and 29.8g citric acid. Add molybdenum trioxide, basic nickel carbonate, concentrated phosphoric acid and 200mL deionized water into a 500ml glass beaker with a white label, place it on a magnetic heating stirrer, heat and stir, and boil for 1-3h. Evaporation can add some deionized water until it is clear and transparent. Stop heating and cool down. When the temperature drops to 60°C, add citric acid and continue stirring. After the citric acid is completely dissolved, the solution is clear and transparent. Dilute to 180mL. The catalyst was prepared by an equal volume impregnation method. After the impregnation was completed, put it into an evaporating dish, seal it with a parafilm and maintain it for 2 to 3 hours, dry it at 200°C for 12 hours, and roast it at 550°...

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Abstract

The invention relates to a preparation method of a high-metal-content hydrogenation catalyst, comprising the steps of depositing an aluminum source modifier to a carrier; mixing a metal, phosphoric acid, an organic complexing agent and deionized water; impregnating the mixture to the carrier on which the aluminum source modifier is deposited; drying and calcining the carrier on which the mixture is impregnated; wherein the metal is made from a main component, Mo in VIB, and an aid component, Ni in VIII, the aluminum source modifier is one, or a composition of any, of aluminum isopropoxide, aluminum chloride and aluminum nitrate, the carrier on which the aluminum source modifier is deposited is 1.3-2.3 ml / g in pore volume and 400-700 m<2> / g in specific surface area, and pores 14-18 nm in diameter accounts for greater than 50%. The preparation method of the high-metal-content hydrogenation catalyst provided herein has significantly improved activity and good pore structure and large specific surface area since metal carrying capacity is increased; the preparation process of the catalyst is simplified, and the preparation cost of high-metal-content hydrogenation catalyst 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 high metal content. 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 research and devel...

Claims

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Application Information

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IPC IPC(8): B01J23/883C10G45/08C10G45/50
Inventor 柴永明郭阳刘晨光刘宾殷长龙郭海玲赵会吉柳云骐左萌谢坤
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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