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Method for preparing hydrodemetalization catalyst

A hydrodemetallization and catalyst technology, applied in the direction of metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as unsatisfactory mechanical strength of catalysts

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

AI Technical Summary

Problems solved by technology

However, because the shaped support has not been roasted, the mechanical strength of the catalyst is not ideal

Method used

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  • Method for preparing hydrodemetalization catalyst
  • Method for preparing hydrodemetalization catalyst
  • Method for preparing hydrodemetalization catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Weigh the pore volume as 0.9ml / g and the specific surface area as 220m 2 100 grams of gamma-phase cylindrical strip-shaped alumina carrier / g is put into the spray rolling pot, and in the rotating state, spray and impregnate 25 ml of xylitol aqueous solution with a mass concentration of 40% to the carrier in the rolling pot in the form of atomization ; Then continue to spray and impregnate the alumina carrier with 40ml of xylitol aqueous solution with a mass concentration of 20%; finally continue to spray and impregnate the alumina carrier with 40ml of xylitol aqueous solution with a mass concentration of 10%. The impregnated alumina support was dried at 110°C for 8 hours. Then use 150ml containing MoO 3 10 g / 100ml (molybdenum source comes from ammonium molybdate), NiO 1.5 g / 100ml (nickel source comes from nickel chloride), urea 26 g / 100ml impregnating the above carrier for 5 hours, filter off the excess solution, and wet agent Transfer to an autoclave and place the au...

Embodiment 2

[0033] Same as Example 1, except that the alumina carrier is a clover strip, 30ml of sorbitol aqueous solution with a mass concentration of 30% is used for the first spray and impregnation, and 50ml of sorbitol with a mass concentration of 10% is used for the second spray and impregnation. Alcohol aqueous solution, use 20ml of sorbitol aqueous solution with a mass concentration of 5% for the third spray dipping. The active component impregnation solution contains MoO 3 8 g / 100ml (molybdenum source comes from ammonium molybdate), NiO 1 g / 100ml (nickel source comes from nickel chloride), and urea 22 g / 100ml impregnate the above carrier. During the hydrothermal treatment, the hydrodemetallization catalyst C2 of the present invention was obtained by sealing heat treatment at 130°C for 6 hours, and then raising the temperature to 220°C for 10 hours. The properties of the catalyst are shown in Table 1.

Embodiment 3

[0035] With embodiment 1, just adopt four times of spray impregnation, use 20ml mass concentration to be the aqueous solution of mannitol of 50% during the first spray impregnation, use 40ml mass concentration to be 30% sorbitol during the second spray impregnation 20ml of sorbitol aqueous solution with a mass concentration of 20% was used for the third spray and dipping, and 20ml of a sorbitol aqueous solution with a mass concentration of 10% was used for the fourth spray and dip. The active component impregnation solution contains MoO 3 12 g / 100ml (molybdenum source comes from ammonium molybdate), NiO2 g / 100ml (nickel source comes from nickel chloride), and 28 g / 100ml urea to impregnate the above carrier. During the hydrothermal treatment, the hydrodemetallization catalyst C3 of the present invention was obtained by sealing heat treatment at 120°C for 8 hours, and then raising the temperature to 240°C for 6 hours. The properties of the catalyst are shown in Table 1.

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Abstract

The invention discloses a method for preparing a hydrodemetalization catalyst. The method comprises the following steps: (1) preparing at least two kinds of polyalcohol and / or monosaccharide aqueous solutions of different concentrations, and carrying out imbibition on an alumina support according to a concentration descending sequence, so as to enable the concentration of polyalcohol and / or monosaccharide to form from-outside-to-inside and from-low-to-high gradient distribution on the support; (2) drying the dipped alumina support, then, dipping the alumina support by a dipping solution containing active ingredients and urea, and carrying out hydrothermal treatment on the wet agent in a hermetic container; and (3) drying the material obtained in the step (2), and then, carrying out oxygen-free high-temperature treatment, thereby obtaining the hydrodemetalization catalyst. According to the catalyst prepared by the method disclosed by the invention, the carbon content is of gradient distribution, the active ingredients are easily vulcanized completely, and active metal ingredients are uniformly distributed on the surface of the support, so that the demetalization activity of the catalyst is remarkably improved.

Description

technical field [0001] The invention belongs to the field of catalyst preparation, in particular to a method for preparing a hydrodemetallization catalyst. Background technique [0002] At present, the most common hydrogenation catalysts are generally supported catalysts with alumina, silica, etc. as the carrier, and Co, Ni, Mo, W and other metals as active components. The active components are loaded on the carrier by impregnation or kneading, and then dried and calcined to obtain the catalyst. When the impregnated wet agent dries, the active components in the impregnating liquid will easily form larger active species particles in the pores of the carrier as the solvent gradually evaporates, causing some pores in the carrier to be blocked, while the solvent evaporates during the evaporation process. The migration of active components will also make the distribution of active components uneven, which will eventually affect the activity of the catalyst. In addition, during ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/883B01J35/10C10G45/08
Inventor 马涛王少军凌凤香赵荣林
Owner CHINA PETROLEUM & CHEM CORP
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