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Hydrotreating catalyst for treating low-quality oil, its preparation method and application

A catalyst and hydrofining technology, applied in catalyst activation/preparation, physical/chemical process catalyst, hydrocarbon oil treatment, etc., can solve the problems of carrier pore size distribution, affecting carrier surface acidity, carrier mechanical strength reduction, etc. Achieve the effects of good activity stability, high strength, and extended operating time

Active Publication Date: 2021-06-29
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method still needs to add a large amount of carbon black particles, and the carbon black particles are larger, which has a greater impact on the pore size distribution of the carrier, resulting in a decrease in the mechanical strength of the carrier. At the same time, the higher calcination temperature affects the surface acidity of the carrier.
Therefore, it is not suitable as a carrier for the production of ultra-low sulfur diesel catalysts

Method used

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  • Hydrotreating catalyst for treating low-quality oil, its preparation method and application
  • Hydrotreating catalyst for treating low-quality oil, its preparation method and application

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preparation example Construction

[0024] Preferably, the preparation method of the carrier includes: mixing alumina and modified graphene, adding an extrusion aid, extruding into a strip, and then drying and calcining.

[0025] Further, the temperature of the drying treatment is 80-160°C.

[0026] Further, the temperature of the calcination treatment is 400-700° C., and the calcination time is 1-15 hours.

[0027] Preferably, the amount of the modified graphene is 0.05-0.5 wt%, especially preferably 0.1-0.3 wt%, of the total mass of the carrier.

[0028] Preferably, the modified graphene is formed by modifying graphene by water vapor spraying.

[0029] In the catalyst of the present invention, before the graphene in the carrier is mixed with alumina, it is modified by water vapor spraying, and the temperature of the water vapor used in the water vapor spraying modification is 100-180° C., and the pressure is It is 0.10~0.25MPa, and the spraying time is 1~5min.

[0030] Further, the graphene adopts single-la...

Embodiment 1

[0058] (1) Preparation of catalyst carrier:

[0059] a1. Thickness 2.0nm, particle size 2.5μm, specific surface area 750m 2 / g of graphene powder 0.20g, spray modification with water vapor at 0.12MPa and 150°C for 5min to obtain bulky modified graphene;

[0060] b1. Mix macroporous alumina (commercially available common macroporous alumina powder with a pore volume of 0.8 to 1.2ml / g) and small pore alumina (commercially available with a pore volume of 0.3 to 0.6ml / g) Ordinary small-pore alumina powder) is mixed and stirred according to the mass ratio of 2:1 as alumina raw material;

[0061] c1. Take 99g of the alumina raw material mixed in step b1, then add the modified graphene in step a1, stir and mix thoroughly, then add extrusion aids, such as citric acid, in an amount that meets the requirements of carrier molding, then knead and roll Pressing and forming into strips;

[0062] d1. Dry the strip-shaped carrier extruded in step c1 at room temperature, then put it in an o...

Embodiment 2

[0070] (1) Preparation of catalyst carrier:

[0071] a1. The thickness is 2.5nm, the particle size is 1.8μm, and the specific surface area is 600m 2 0.25g of graphene powder per gram was sprayed and modified with water vapor at 0.18MPa and 100°C for 1min to obtain fluffy and flocculent modified graphene;

[0072] b1. Mix macroporous alumina (commercially available common macroporous alumina powder with a pore volume of 0.8 to 1.2ml / g) and small pore alumina (commercially available with a pore volume of 0.3 to 0.6ml / g) Ordinary small-pore alumina powder) is mixed and stirred according to the mass ratio of 1:3 as alumina raw material;

[0073] c1. Take 99g of the alumina raw material mixed in step b1, then add the modified graphene in step a1, stir and mix thoroughly, then add extrusion aids, such as citric acid, in an amount that satisfies the carrier molding, then knead and roll Pressing and forming into strips;

[0074] d1. Dry the strip-shaped carrier extruded in step c1 ...

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Abstract

The invention discloses a hydrotreating catalyst for treating low-quality oil, which comprises a metal active component and a carrier that supports the metal active component, and the carrier is mainly formed by mixing modified graphene and alumina through extrusion and extrusion. Formed by drying and calcining, the metal active component includes metal oxides, and the metal oxides include oxides of metal elements in Group VIB and / or Group VIII; the average pore diameter of the catalyst is 30-80 nm, and the specific surface area is 100 nm. ~300m 2 / g, the crushing strength is 300N·cm ‑1 above. The invention also provides the preparation method and application of the catalyst. Compared with conventional hydrotreating catalysts, the catalyst provided by the present invention has the advantages of high strength, concentrated pore distribution, large pore volume, and large specific surface area, and has good stability to activity, and is suitable for treating inferior products with high asphaltene content. Oil.

Description

technical field [0001] The invention relates to the field of preparation of hydrotreating catalysts, in particular to a hydrotreating catalyst for treating low-quality oil materials and its preparation method and application. Background technique [0002] In recent years, my country's air quality has become worse and worse, and there is an urgent need for cleaner vehicle motors to transport fuel oil; Catalytic external oil slurry, catalytic heavy cycle oil, etc. These raw materials contain high content of residual carbon and asphaltenes. In addition, more coal-based oil fixed-bed hydrogenation units have been built in recent years, and there is an urgent need to process heavier and lower-quality feedstock oils. All of the above current situations require hydrotreating catalysts that can handle lower-quality raw materials. Converted into clean and environmentally friendly light fuel oil. Current fixed bed hydrotreating catalysts can only treat feedstocks with an asphaltene c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/888B01J35/10B01J37/02C10G45/08
CPCC10G45/08B01J23/888B01J37/0203B01J37/0207C10G2300/70B01J35/651B01J35/647B01J35/615
Inventor 许杰尹宏峰
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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