Method for preparing catalyst by hydrotreatment

A hydrotreating and catalyst technology, applied in physical/chemical process catalysts, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc. It can improve the activity, reduce the rate of activity loss, and enhance the promotion effect.

Active Publication Date: 2012-05-16
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Adding an organic complexing agent in this method improves the stability of boron, but due to simultaneous impregnation with active metals, boron and active metals compete with the carrier for adsorption, which affects the dispersion of active metals on the carrier.
In addition, since boron is introduced after the alumina carrier is formed, it has little effect on the pore structure and channel of the alumina carrier, and does not play a role in pore expansion; the acid center type of the carrier is not adjusted before loading the active metal; It does not weaken the strong interaction between the active metal and the support, which reduces the activity of the catalyst

Method used

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  • Method for preparing catalyst by hydrotreatment
  • Method for preparing catalyst by hydrotreatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] will contain Al 2 o 3 5g / 100mL AlCl 3 Solution 2000mL with NH 3 10g / 100mL of ammonia water was added dropwise into the gelling reaction tank stirred at a temperature of 60°C, and the pH value was maintained at 7.6, and the reaction contact time was 40min. Aging was performed at a temperature of 70°C and a pH of 8.0. The aging time is 1h. The product was filtered, and then washed with deionized water with a solid-to-liquid volume ratio of 1:20 at a washing temperature of 80° C. for three times. The obtained filter cake was dried at 120° C. for 3 h to obtain aluminum hydroxide.

[0032] Take 100g of the above-mentioned aluminum hydroxide, mix it with 110g of SB alumina powder peptized by nitric acid, knead for 20min, make a plastic paste, and extrude it through a clover orifice plate with a diameter of 1.4mm. After the wet strip was dried at 130°C for 8h, it was calcined at 520°C for 4h to obtain alumina carrier S-1.

Embodiment 2

[0034] After the gelling reaction of Example 1, add the 2 o 3 3g / 100mL organic compound solution 100mL. The boron-containing organic compound solution is prepared by dissolving boric acid in water, and then the molar ratio of boric acid to mannitol is 1:1. The preparation of other aluminum hydroxide is the same as in Example 1 to obtain boron-containing aluminum hydroxide.

[0035] Take 120g of the above-mentioned boron-containing aluminum hydroxide, mix it with 126g of SB alumina powder peptized by nitric acid and an aqueous solution containing molybdenum and cobalt, and knead for 20 minutes to make a plastic paste, and extrude it through a clover orifice plate of φ1.4mm. The wet bar was dried at 130°C for 3 hours, then calcined at a constant temperature of 220°C for 2 hours, at a constant temperature of 320°C for 2.0 hours, and at a constant temperature of 530°C for 3.0 hours to obtain a catalyst C-2 intermediate, in which MoO 3 The weight content of CoO is 11.1%, and the ...

Embodiment 3

[0037] The boron-containing organic compound solution in Example 2 was replaced by the boric acid to ethylene glycol molar ratio of 1.0:1.5, and other aluminum hydroxide was prepared in the same way as in Example 2 to obtain boron-containing aluminum hydroxide.

[0038] Take 110g of the above-mentioned boron-containing aluminum hydroxide, mix it with 118g of SB alumina powder peptized by nitric acid and an aqueous solution containing molybdenum and phosphorus, knead for 20 minutes, and make a plastic paste, and extrude it through a clover orifice plate with a diameter of 1.4mm. The wet bar was dried at 140°C for 3h, then calcined at a constant temperature of 200°C for 0.5h, at a constant temperature of 320°C for 2.0h, and at a constant temperature of 530°C for 3.0h to obtain the catalyst C-3 intermediate, in which MoO 3 The weight content of P is 23.2%, and the weight content of P is 0.85%. The catalyst C-3 intermediate was impregnated with the remaining molybdenum, nickel and...

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Abstract

The invention discloses a method for preparing a catalyst by hydrotreatment. The method comprises the following steps: gelatinizing aluminum hydroxide and adding a stable boron-containing organic compound solution, introducing a boron auxiliary agent to obtain the boron-containing aluminum hydroxide, mixing active metal ingredients with boron-containing aluminum hydroxide by a wet-mixing-kneadingmethod, three-segment roasting to obtain a catalyst intermediate, dipping the residual partial active metal and loading on the catalyst intermediate, drying to obtain the hydrotreatment catalyst. According to the invention, the boron auxiliary agent and the active metal ingredients are uniformly distributed on the surface of the catalyst, active metal ingredients introduced by two modes has different forms in the catalyst, mutual cooperation enables reduction of activity loss rate of the catalyst, and the running period of the apparatus can be prolonged. The catalyst has the characteristics of large pore volume and large specific surface area, and possesses proper pore structure and acidity, is especially suitable for hydrodenitrogenation process of heavy hydrocarbon.

Description

technical field [0001] The invention relates to a preparation method of a hydroprocessing catalyst, in particular to a preparation method of a hydroprocessing catalyst used for hydrodenitrogenation of heavy hydrocarbons. Background technique [0002] At present, countries all over the world have increasingly stringent requirements on vehicle fuels, especially the content of sulfur, nitrogen and aromatics. However, as the amount of oil extracted increases, it becomes heavier and worse day by day, and the human demand for vehicle fuel continues to increase, which makes it more and more difficult for refineries to process oil. Among them, hydrogenation technology is one of the important technologies for producing qualified fuels. Under the above-mentioned background, the raw materials processed by this technology are also deteriorating and becoming heavier, which constantly puts forward new requirements for hydrogenation catalysts. [0003] Hydrogenation catalysts usually use ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/882B01J27/19B01J23/888B01J35/10C10G45/08
Inventor 王敏凌凤香孙万付马涛
Owner CHINA PETROLEUM & CHEM CORP
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