Preparation method of carbon-containing hydrodemetallization catalyst

A hydrodemetallization and catalyst technology, which is applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve incomplete hydrodemetallization reactions and catalyst accumulation Carbon deactivation and other issues, to achieve the effect of mass transfer and diffusion, improve mechanical strength, high metal capacity

Active Publication Date: 2020-03-31
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this method, the catalyst carrier is stacked by a plurality of nano-rod-shaped alumina monomers, and the pores formed are relatively large. Although it is beneficial to the diffusion of macromolecules such as colloids and asphaltenes, it also takes a long time for the reaction molecules to stay in the pores of the catalyst. Short, easy to lead to incomplete hydrodemetallization reaction, and at the same time, due to the high acidity of the alumina support, it is easy to cause carbon deposition and deactivation of the catalyst

Method used

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  • Preparation method of carbon-containing hydrodemetallization catalyst
  • Preparation method of carbon-containing hydrodemetallization catalyst
  • Preparation method of carbon-containing hydrodemetallization catalyst

Examples

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Embodiment 1

[0039] (1) Weigh 100 grams of alumina powder and place it in 630 grams of ammonium bicarbonate aqueous solution with a mass concentration of 16.8wt%. After sealing in a closed autoclave, heat treat at 135°C for 7 hours, filter and wash the material at 110°C Drying for 6 hours, soaking the above-mentioned materials with a xylitol solution with a mass concentration of 8.5% to obtain modified rod-shaped alumina clusters;

[0040] (2) Mix 200g of pseudo-boehmite, 45g of modified rod-shaped alumina clusters and 3g of scallop powder evenly, add an appropriate amount of aqueous solution dissolved in 4g of acetic acid, knead, extrude, and dry the molded product at 140°C for 6 hours , and then use 35ml mass concentration of 27.5wt% xylitol aqueous solution to impregnate the carrier by unsaturated spraying, then successively dry at 140°C for 6 hours, bake at 720°C for 6 hours under nitrogen atmosphere, and treat with 1250W microwave for 255s under nitrogen atmosphere to obtain Carbon al...

Embodiment 2

[0042] With embodiment 1, just the consumption of ammonium bicarbonate solution is 860 grams, and the mass concentration of solution is 15.6%. The heat treatment temperature was 155° C., and the treatment time was 4.5 hours. The mass concentration of carbon-containing precursor solution I is 7.3%, the amount of modified rod-shaped alumina clusters added is 36 grams, the mass concentration of carbon-containing precursor solution II is 30.5%, the dosage is 30ml, and the roasting temperature is 750°C under nitrogen atmosphere , the microwave treatment power was 1050W, and the treatment time was 275s, and the carbon-containing alumina carrier was obtained. The properties of the carrier are shown in Table 1.

Embodiment 3

[0044] With embodiment 1, just the consumption of ammonium bicarbonate solution is 540 grams, and the mass concentration of solution is 19.3%. The heat treatment temperature was 145° C., and the treatment time was 5.5 hours. The mass concentration of carbon-containing precursor solution I is 6.5%, the amount of modified rod-shaped alumina clusters added is 55 grams, the mass concentration of carbon-containing precursor solution II is 33.5%, the dosage is 22ml, and the roasting temperature is 700°C under nitrogen atmosphere , the microwave treatment power was 1350W, and the treatment time was 230s, and the carbon-containing alumina carrier was obtained. The properties of the carrier are shown in Table 1.

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Abstract

The invention discloses a preparation method of a carbon-containing hydrodemetallization catalyst. The method comprises the following steps: (1) immersing alumina powder into an ammonium bicarbonate aqueous solution, carrying out sealed heat treatment, carrying out solid-liquid separation, drying the solid-phase material, immersing the dried material with a carbon-containing precursor solution I,carrying out solid-liquid separation on the immersed material, and drying the solid-phase material to obtain a modified rod-like alumina cluster body; (2) carrying out mixing kneading molding on the modified alumina cluster body obtained in the step (1) and pseudo-boehmite, drying the molded product, spraying and soaking the molded product with a carbon-containing precursor solution II, drying, and then sequentially carrying out carbonization treatment and microwave treatment in an inert atmosphere to obtain a carbon-containing alumina carrier; and (3) loading a hydrogenation active componenton the carbon-containing alumina carrier to obtain the hydrodemetallization catalyst. The hydrodemetallization catalyst has the advantages of large pore volume, large pore size, high mechanical strength and low acid content, and is suitable for the field of hydrodemetallization of heavy residual oil.

Description

technical field [0001] The invention relates to a preparation method of a carbon-containing hydrogenation demetallization catalyst, and the catalyst is especially suitable for the residual oil hydrogenation treatment process. Background technique [0002] At present, in the production process of heavy oil hydrodemetallization, because the raw oil contains a certain amount of impurities such as vanadium, sulfur, arsenic, nickel, etc., it is easy to form deposits, thereby blocking the pores of the catalyst, resulting in a rapid decline in catalyst activity, and even Inactivation affects industrial applications. Catalysts with larger pore volume and larger pore diameter have strong metal and carbon storage capacity, which can slow down the deactivation of the catalyst and prolong the operation period of the catalyst. As a commonly used catalyst carrier in the petrochemical industry, alumina has always been the most widely used and used catalyst carrier because of its good mech...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/883C10G45/08
CPCB01J23/883C10G45/08C10G2300/205C10G2300/70C10G2300/1077Y02P20/52
Inventor 季洪海凌凤香王少军张会成沈智奇
Owner CHINA PETROLEUM & CHEM CORP
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