Method for preparing hydro-demetalization catalyst

A technology for hydrodemetallation and catalysts, which is applied in catalyst activation/preparation, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve problems such as affecting catalyst activity, and improve activity stability. , to avoid uneven distribution, the effect of long service life

Active Publication Date: 2012-05-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The catalyst prepared by this method does not need to be impregnated and dried, and the active components come from commercial shaped catalysts, which avoids the disadvantage of uneven distribution of active components on the inside and outside of the catalyst due to capillary action during the drying process of the wet catalyst, but during the preparation process It is difficult to distribute the active components evenly by mechanical mixing and grinding, which affects the activity of the catalyst

Method used

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  • Method for preparing hydro-demetalization catalyst

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0024] Weigh the pore volume as 0.95ml / g and the specific surface area as 200m 2 100 grams of γ-phase cylindrical strip-shaped alumina carrier / g, add 150ml Mo-Ni-NH 3 solution (with MoO 3 12.0wt%, NiO3.0wt%) impregnated for 2 hours, filter off the excess solution, put the impregnated wet catalyst in the atmosphere roasting furnace, feed water vapor, control the pressure of water vapor in the furnace cavity to be the saturated steam of the steam Pressing pressure, the roasting furnace heats up slowly, and the heating rate is 5°C·min -1 After the temperature rose to 80°C, the temperature was kept constant for 3 hours, then the water vapor was stopped, and dry air was passed in, and dried at 100°C for 3 hours. The dried catalyst was calcined at 550° C. for 4 hours to obtain the hydrodemetallization catalyst C1 of the present invention.

example 2

[0026] Same as Example 1, except that the mixed gas of water vapor and air is fed in, wherein water vapor accounts for 70% by volume, the temperature is raised to 100°C, and the temperature is kept constant for 2 hours, then the water vapor atmosphere is stopped, and dry air is passed in, and dried at 120°C for 2 hours. Hour. The dried catalyst was calcined at 550° C. for 4 hours to obtain the hydrodemetallization catalyst C2 of the present invention.

example 3

[0028] Same as Example 1, except that the mixed gas of water vapor and nitrogen is fed, wherein water vapor accounts for 80% by volume, the temperature is raised to 110°C, and the temperature is kept constant for 2 hours, then the water vapor atmosphere is stopped, and dry air is passed in, and dried at 130°C for 2 hours. Hour. The dried catalyst was calcined at 550° C. for 4 hours to obtain the hydrodemetallization catalyst C3 of the present invention.

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Abstract

The invention discloses a method for preparing a hydro-demetalization catalyst, which comprises the following steps of: weighing or preparing an alumina carrier; (2) preparing an ammonia solution or an aqueous solution from a VIB metallic compound and/or a VIII metallic compound; and (3) dipping the alumina carrier obtained in the step (1) by using the solution prepared in the step (2), preheating an obtained wet catalyst in water-vapor-contained atmosphere, then, drying in air atmosphere, and then, roasting the catalyst to prepare the final catalyst. The hydro-demetalization catalyst prepared through the method disclosed by the invention is even in the distribution of active components and has higher activity and higher activity stability.

Description

technical field [0001] The invention relates to a preparation method of a hydrodemetallization catalyst. Background technique [0002] With the continuous reduction of oil resources and the increasing trend of heavy and inferior crude oil, heavy oil deep processing technology has been highly valued by refiners at home and abroad. During heavy oil processing (residual oil hydrocracking, hydrodesulfurization, etc.), metal-organic compounds will decompose, and metal elements will be deposited on the inner and outer surfaces of the catalyst, which may even block the catalyst pores, resulting in a rapid decline in catalyst activity. . Therefore, in the hydrotreating of heavy oil and residual oil, it is necessary to use a demetallization catalyst in order to protect the catalyst from loss of activity due to a large amount of metal deposition. Al 2 o 3 or SiO 2 -Al 2 o 3 As a carrier, it supports active components of group VIII and / or group VIB metal elements. During the ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/883B01J37/02C10G45/08
Inventor 季洪海沈智奇凌凤香王少军
Owner CHINA PETROLEUM & CHEM CORP
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