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Carrier, catalyst and preparation method for hydrodenitrogenation

A hydrodenitrogenation and catalyst technology, applied in the direction of catalyst activation/preparation, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems of single function and poor metal tolerance, and achieve High activity, high denitrification ability, and the effect of improving permeability

Active Publication Date: 2021-10-08
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the shortcomings of single function and poor metal capacity of residual oil hydrodenitrogenation catalysts in the prior art, the present invention provides a catalyst for hydrodenitrogenation with good diffusion performance for macromolecules, strong metal capacity and high denitrogenation capacity. Nitrogen catalyst carrier, hydrodenitrogenation catalyst and preparation method thereof

Method used

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  • Carrier, catalyst and preparation method for hydrodenitrogenation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Weigh 500 grams of pseudoboehmite A1 (produced by Wenzhou Jingjing Alumina Co., Ltd., with a weight content of 70% on a dry basis) and roast at 455°C for 6.5 hours to prepare alumina.

[0041] Weigh 50 grams of the above-mentioned alumina and place it in 285 grams of ammonium bicarbonate aqueous solution with a mass concentration of 21%, transfer the mixed material into an autoclave and seal it, heat it at 145°C for 4 hours, and then dry the carrier at 105°C for 6 hours. The above materials were impregnated with silica sol with a mass content of 8% silica for 2 hours, the amount of silicon-containing solution was such that the impregnated materials were completely submerged, and the impregnated materials were dried at 120°C for 6 hours. The above-mentioned oxides were completely immersed in a solution of polyethylene glycol-6000 (that is, the molecular weight is 6000) with a mass concentration of 24% and soaked for 1.5 hours, and then the carrier was dried at 120°C for 6...

Embodiment 2

[0045] Same as Example 1, except that the calcination temperature of pseudo-boehmite A1 is 545°C. The consumption of ammonium bicarbonate solution is 400 grams, and the mass concentration of solution is 22.5%. The heat treatment temperature was 160° C., and the treatment time was 6 hours. The mass content of silicon dioxide in the silica sol is 10%, the polyethylene glycol-6000 is changed to polyethylene glycol-2000 (that is, the molecular weight is 2000), and the mass concentration is 30%. The addition amount of the rod-shaped silicon-containing alumina cluster is 16 grams, and the hydrodenitrogenation catalyst carrier Z2 and the hydrodenitrogenation catalyst C2 are obtained. In the carrier, the content of silica weight is 2.4wt%, and the carrier properties are shown in Table 1 .

Embodiment 3

[0047] Same as Example 1, except that the roasting temperature of pseudo-boehmite is 505°C. The consumption of ammonium bicarbonate solution is 500 grams, and the mass concentration of solution is 24%. The heat treatment temperature was 140° C., and the treatment time was 6 hours. The mass content of silicon dioxide in the silica sol is 5%, polyethylene glycol-6000 is changed to polyethylene glycol-2000, and the mass concentration is 20%. The addition amount of the rod-shaped silicon-containing alumina cluster is 18 grams, and the hydrodenitrogenation catalyst carrier Z3 and the hydrodenitrogenation catalyst C3 are obtained. In the carrier, the content of silica weight is 3.7wt%, and the carrier properties are shown in Table 1 .

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Abstract

The invention discloses a carrier for hydrogenation denitrogenation, a catalyst and a preparation method thereof. The carrier is a silicon-containing alumina carrier, which contains rod-shaped silicon-containing alumina clusters, the length of the rod-shaped silicon-containing alumina is 1-4µm, the diameter is 100-300nm, and the outer diameter of the rod-shaped silicon-containing alumina cluster is 5 ‑18µm, the rod-shaped silica-alumina clusters account for 5%‑15% of the weight of the silica-alumina carrier. The preparation method of the carrier comprises: roasting the pseudo-boehmite A to obtain alumina; then immersing the ammonium bicarbonate aqueous solution for sealing heat treatment, drying, then impregnating with the silicon-containing solution, then soaking with the polyethylene glycol solution, and drying, A rod-shaped silicon-containing alumina cluster body is obtained; the pseudo-boehmite B is kneaded with the above-mentioned cluster body, and post-treated to obtain a silicon-containing alumina carrier. The hydrodenitrogenation catalyst is especially suitable for the residual oil hydrodenitrogenation treatment process, and has the characteristics of strong metal-accommodating capacity, high desulfurization and denitrogenation capacity, and the like.

Description

technical field [0001] The invention relates to a silicon-containing alumina carrier and a preparation method thereof, in particular to a silicon-containing alumina carrier used as a residual oil hydrogenation denitrogenation catalyst and a preparation method thereof. Background technique [0002] The current residual oil hydroprocessing technology is mainly to provide raw materials for the catalytic cracking process. The nitrogen content of the residual oil hydroprocessing product is not high, the nitrogen content can be as high as 1000μg / g, and the metal content is not high. However, the operation period of the residual oil hydrotreating unit is generally only one year. If you want the residual oil hydroprocessing product to meet the requirements of hydrocracking feedstock, you must greatly reduce the nitrogen and metal content in the residual oil hydroprocessing product, but judging from the current process and catalyst, it is difficult to meet the requirements. Even if ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/08B01J23/883B01J35/10B01J37/02B01J37/08C10G45/08
Inventor 隋宝宽季洪海彭冲吕振辉关月明佟佳
Owner CHINA PETROLEUM & CHEM CORP
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