Hydrogenating and demetalization catalyst and its prepn

A technology of hydrodemetallization and hydrogenation of metals, which is applied in the direction of catalyst activation/preparation, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc. It can solve the problems of insufficient concentration and achieve high activity Effect

Inactive Publication Date: 2003-05-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the prior art, no matter whether the pore-enlarging agent is added or not, in order to increase the pore diameter of the alumina carrier, the calcination temperature when preparing the alumina carrier is above 800°C, even above 840°C, which makes the prior art The alumina carrier is a mixed phase of γ-alumina and δ-alumina, even pure δ-alumina
In addition, although the alumina support pores of the prior art are also concentrated in the range of 10-20 nanometers, the concentration is not high enough, and the pore volume of pores with a diameter of 10-20 nanometers accounts for the highest percentage of the total pore volume. %, which makes the activity and activity stability of existing hydrodemetallization catalysts need to be further improved

Method used

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Examples

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preparation example Construction

[0016] According to the preparation method of the catalyst provided by the present invention, the specific method for drying the shaped article can be any method, as long as the temperature of 90-300° C. is satisfied within 35 minutes to dry the shaped article. For example, blast drying can be used to quickly dry the molded product. When belt drying is used in the industry, spreading the molded product into a thin layer of less than 3 cm on the conveyor belt can also dry the molded product quickly. Among them, the drying temperature is preferably 100-280°C, and the drying time is as short as possible, preferably 1-30 minutes or less. The rapid drying method of the present invention can prevent the acid in the molding from continuing to react with pseudo-boehmite and / or alumina, so that the pore volume of the alumina carrier can be greater than 0.65 while lowering the calcination temperature. Milliliter / g, and ensure that the alumina support obtained is pure γ-alumina.

[0017] The...

example 1

[0027] This example illustrates the properties of the alumina support used in the catalyst provided by the present invention and its preparation method.

[0028] Weigh 300 grams of pseudo-boehmite prepared in CN1247772A Example 1, and mix them with 3.9 grams of 65% by weight nitric acid, 3 grams of Sesbania powder and 120 grams of deionized water, and squeeze the extruder into a circumscribed circle with a diameter of 1.8 mm trilobal strips. Air drying was carried out at 110°C. After 25 minutes, the molded product was completely dried. The dried molded product was passed into 100% steam at a temperature of 650°C, and the flow rate was 1.5 grams of steam per gram of catalyst per hour, and calcined for 5 hours to obtain the alumina carrier Z used in the catalyst provided by the present invention. 1 . Z 1 The properties are listed in Table 1. Among them, the phase of alumina was measured by X-ray diffraction. The specific surface, pore volume, possible pore diameter and pore distribu...

example 2

[0030] This example illustrates the properties of the alumina support used in the catalyst provided by the present invention and its preparation method.

[0031] The alumina carrier was prepared according to the method of Example 1, except that the calcination temperature was 750°C, the calcination time was 2 hours, the calcination atmosphere was a mixture of water vapor and air containing 10% water vapor, and the flow rate was per gram of catalyst per gram. 0.5 g of water vapor per hour to obtain the alumina carrier Z used in the catalyst provided by the present invention 2 . Z 2 The properties are listed in Table 2.

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Abstract

The hydrogenating and demetalization catalyst contains a alumina carrier and hydrogenating group VIB and group VIII metal component carried on the carrier, where the alumina carrier is gamma-alumina,which has such pore distribution that the pore volume of pores of 10-20 nm diameter accounts for 70-98 % of the total pore volume. The catalyst has high activity and high activity stability.

Description

Technical field [0001] The present invention relates to a hydrodemetalization catalyst and a preparation method thereof, and more specifically to a hydrodemetalization catalyst containing hydrogenation metal components of groups VIB and VIII in the periodic table and preparation method thereof method. Background technique [0002] In recent years, the tendency of crude oil to be re-qualified and deteriorated has become more and more serious. The content of metal impurities in petroleum distillates, such as heavy oil, especially residual oil, such as nickel and vanadium, has been increasing. These metal impurities must be removed. Hydrotreating these oils is the main means to remove metal impurities, and the hydrodemetalization catalyst is the key to the hydrotreating process. Since it is difficult to regenerate the hydrodemetalization catalyst after its deactivation, the activity and activity stability of the hydrodemetalization catalyst are the key indic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/00B01J37/00C10G45/12
Inventor 杨清河朱立康小洪聂红石亚华李大东戴立顺胡云剑
Owner CHINA PETROLEUM & CHEM CORP
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