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A kind of preparation method of hydrotreating catalyst

A hydrogenation treatment and catalyst technology, which is applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of low utilization rate of active metals and influence on catalyst activity, etc., so as to improve the effective utilization rate, High utilization rate of active metals and the effect of improving hydrogenation activity

Active Publication Date: 2016-01-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the catalyst obtained by the above method, the active metal gradually increases along the outer surface of the catalyst particle to the center, and the utilization rate of the active metal is low, which in turn affects the activity of the catalyst.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0025] According to the preparation method of hydrotreating catalyst provided by the present invention, its concrete steps are as follows:

[0026] (1) Add polyethylene glycol to water and / or ethanol to prepare a solution containing polyethylene glycol;

[0027] (2) Immerse the solution containing polyethylene glycol on the carrier. The sample should be cured for 2 to 12 hours, and then dried under the condition of not exceeding the decomposition temperature of the polyethylene glycol used. The drying temperature is generally 60 ℃ ~ 250 ℃, drying time 0.5h ~ 20h;

[0028] (3) Spray and soak the above-mentioned carrier with a solution containing active metal components, and the spray and soak time is generally 5 minutes to 40 minutes. After spraying and immersion, it can directly go into the drying step, or undergo curing. The curing time is 0.5-6 hours, and then drying and roasting are carried out. The conditions of the drying and roasting are conventional.

Embodiment 1

[0034] Weigh 9g of polyethylene glycol 1000 (that is, polyethylene glycol with a molecular weight of 1000, the same below), stir and dissolve in measured water to prepare a solution containing polyethylene glycol. Impregnate 100g of alumina carrier with the solution containing polyethylene glycol in equal volume, and then perform 10h curing, and after drying at 120°C for 3h, the semi-finished product obtained is designated as Z1.

[0035] Use the immersion liquid containing Mo, Ni, P to evenly spray and immerse on Z1, and the spray immersion time is 20min. After spraying, part of the samples were directly dried at 120°C for 3 hours, and after calcination at 480°C for 2 hours, the obtained catalyst was designated as C1; after spraying, part of the samples were cured for 1 hour, and after the same post-treatment steps as catalyst C1, the obtained catalyst was designated as C2 ; A part of the samples were cured for 3 hours after the spraying, and after the same post-treatment ste...

Embodiment 2

[0037] Weigh 5g of polyethylene glycol 2000, stir and dissolve in the measured ethanol solution to prepare a solution containing polyethylene glycol. Impregnate 100g of alumina carrier with the solution containing polyethylene glycol in equal volume, and then perform 2h curing, and after drying at 100°C for 3h, the semi-finished product obtained is designated as Z2.

[0038] Use the immersion liquid containing Mo, Ni, Co, P to evenly spray and immerse on Z2, and the spray immersion time is 20min. After the spray immersion, the samples were directly dried at 120°C for 3 hours and calcined at 480°C for 2 hours. The obtained catalyst was designated as C4.

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Abstract

The invention discloses a preparation method of a hydrotreating catalyst. The method is as follows: using a solution containing polyethylene glycol with a molecular weight of 1000 to 8000 for impregnation of a catalyst carrier, drying at a temperature no greater than the decomposition temperature of the used polyethylene glycol, then using an impregnation solution containing a hydrogenation active metal component for impregnation, drying and roasting to obtain the hydrotreating catalyst, wherein the impregnation using the solution containing the polyethylene glycol is saturated impregnated or supersaturated impregnated. According to the method, the active metal concentration gradually decreases from the outer surface to the center along catalyst particles, the active metal utilization rate is high, and the hydrotreating catalyst prepared by the preparation method has higher hydrogenation activity at a high space velocity.

Description

technical field [0001] The invention relates to a preparation method of a hydrogenation treatment catalyst, in particular to a preparation method suitable for a hydrocracking post-treatment catalyst. Background technique [0002] Hydrocracking refers to the conversion process in which hydrocarbon molecules and hydrogen undergo hydrogenation and cracking reactions on the surface of catalysts under relatively high pressure to generate smaller molecules. After VGO is hydrocracked, a small amount of olefins in the product will react with hydrogen sulfide in the system to generate mercaptans. This leads to too high content of mercaptans in products (especially jet fuel), and the presence of mercaptans in products can not only cause foul smell in products and reduce the quality and stability of oil products, but mercaptans themselves are also corrosive, which seriously affects product quality , which is a problem that hydrocracking catalysts cannot solve. With the increase of hi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/883B01J37/02C10G49/04
Inventor 杨占林姜虹唐兆吉王继锋温德荣魏登凌
Owner CHINA PETROLEUM & CHEM CORP
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