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A kind of 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 facilitating mass transfer and diffusion, improving anti-carbon deposition, and high metal capacity

Active Publication Date: 2022-07-12
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • A kind of preparation method of carbon-containing hydrodemetallization catalyst
  • A kind of preparation method of carbon-containing hydrodemetallization catalyst
  • A kind of preparation method of carbon-containing hydrodemetallization catalyst

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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 16.8 wt%, seal it in an airtight autoclave, heat treatment at 135 °C for 7 hours, filter and wash the material at 110 °C Dry for 6 hours, soak the above-mentioned material with a xylitol solution with a mass concentration of 8.5% to obtain a modified rod-shaped alumina cluster;

[0040] (2) Mix 200 g of pseudo-boehmite, 45 g of modified rod-shaped alumina clusters and 3 g of succulent powder evenly, add an appropriate amount of aqueous solution containing 4 g of acetic acid, knead, and extrude into strips, and the molded product is dried at 140 ° C for 6 hours , and then sprayed and impregnated the carrier with 35 ml of an unsaturated xylitol aqueous solution with a mass concentration of 27.5 wt%, followed by drying at 140 °C for 6 hours, calcining at 720 °C for 6 hours in a nitrogen atmosphere, and microwave treatment at 1250W for 255s in...

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 addition amount of modified rod-shaped alumina clusters is 36 grams, the mass concentration of carbon-containing precursor solution II is 30.5%, the dosage is 30 ml, and the calcination temperature under nitrogen atmosphere is 750 ° C , the microwave processing power is 1050W, and the processing time is 275s, and the carbon-containing alumina carrier is 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 addition amount of modified rod-shaped alumina clusters is 55 grams, the mass concentration of carbon-containing precursor solution II is 33.5%, the dosage is 22 ml, and the calcination temperature under nitrogen atmosphere is 700 ° C , the microwave processing power is 1350W, and the processing time is 230s, and the carbon-containing alumina carrier is 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, comprising the following contents: (1) immersing alumina powder in an aqueous ammonium bicarbonate solution for sealing and heat treatment, after heat treatment, solid-liquid separation, drying of solid phase materials, drying The material is soaked with carbon-containing precursor solution I, after soaking, the material is solid-liquid separated, and the solid-phase material is dried to obtain a modified rod-shaped alumina cluster; (2) The modified alumina cluster in step (1) is mixed with the pseudo-thin The diaspore is kneaded and formed, the formed product is dried, sprayed with carbon-containing precursor solution II, dried, and then carbonized and microwaved in sequence under an inert atmosphere to obtain a carbon-containing alumina carrier; (3) The hydrogenation active group It is sub-loaded on a carbon-containing alumina carrier to obtain a hydrodemetallization catalyst. The hydrodemetallization catalyst has large pore volume and pore diameter, high mechanical strength and low acid content, and is suitable for the field of heavy residue oil hydrodemetallization.

Description

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

Claims

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Application Information

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Patent Type & Authority Patents(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