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Carrier for hydrodenitrogenation, catalyst and preparation method of carrier

A hydrodenitrogenation and catalyst technology, which is applied in catalyst activation/preparation, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc. The effect of high activity, high demetallization rate and desulfurization rate, and high denitrification ability

Active Publication Date: 2019-05-07
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 for hydrodenitrogenation, catalyst and preparation method of carrier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Weigh 500 grams of pseudo-boehmite A1 (produced by Wenzhou Jingjing Alumina Co., Ltd., with a dry weight content of 70%) and calcinate at 455 ° C for 6.5 hours to obtain alumina.

[0041] 50 grams of above-mentioned alumina was weighed and placed in 285 grams of ammonium bicarbonate aqueous solution with a mass concentration of 21%, the mixture was transferred into the autoclave and sealed at 145°C for 4 hours, and then the carrier was dried at 105°C for 6 hours. The above material was impregnated with silica sol with a mass content of 8% silica for 2 hours. The amount of the silicon-containing solution was such that the impregnated material was completely immersed, and the impregnated material was dried at 120° C. for 6 hours. The above oxides were immersed and soaked for 1.5 hours with polyethylene glycol-6000 solution with a mass concentration of 24% (ie, molecular weight of 6000), and then the carrier was dried at 120 °C for 6 hours to obtain rod-shaped silica-contai...

Embodiment 2

[0045] Same as Example 1, except that the calcination temperature of pseudo-boehmite A1 is 545°C. The dosage of ammonium bicarbonate solution is 400 grams, and the mass concentration of the solution is 22.5%. The heat treatment temperature was 160°C, and the treatment time was 6 hours. The mass content of silica 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%. Rod-shaped silica-containing alumina clusters were added in an amount of 16 grams to obtain a hydrodenitrogenation catalyst carrier Z2 and a hydrodenitrogenation catalyst C2. In this carrier, the weight content of silica was 2.4 wt%, and the properties of the carrier were shown in Table 1. .

Embodiment 3

[0047] Same as Example 1, except that the calcination temperature of pseudo-boehmite is 505°C. The dosage of ammonium bicarbonate solution is 500 grams, and the mass concentration of the solution is 24%. The heat treatment temperature was 140°C, and the treatment time was 6 hours. The mass content of silica in the silica sol is 5%, the polyethylene glycol-6000 is changed to polyethylene glycol-2000, and the mass concentration is 20%. Rod-shaped silica-containing alumina clusters were added in an amount of 18 grams to obtain a hydrodenitrogenation catalyst carrier Z3 and a hydrodenitrogenation catalyst C3. In this carrier, the weight content of silica was 3.7 wt%, and the properties of the carrier were shown in Table 1. .

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Abstract

The invention discloses a carrier for hydrodenitrogenation, a catalyst and a preparation method of the carrier. The carrier is a silicon-containing alumina carrier, which contains rod-like silicon-containing alumina cluster, wherein the rod-like silicon-containing alumina has a length of 1-4 [mu]m and a diameter of 100-300 nm, and the rod-like silicon-containing alumina cluster has an outer diameter of 5-18 [mu]m, and accounts for 5-15% of the weight of the silicon-containing alumina carrier. The preparation method of the carrier comprises: calcining pseudo-boehmite A to obtain alumina; immersing the alumina in an ammonium bicarbonate aqueous solution, carrying out sealing heat treatment, drying, impregnating with a silicon-containing solution, soaking with a polyethylene glycol solution,and drying to obtain a rod-like silicon-containing alumina cluster; and carrying out mixing kneading molding on pseudo-boehmite B and the rod-like silicon-containing alumina cluster, and carrying outpost-treatment to obtain the silicon-containing alumina carrier. According to the present invention, the hydrodenitrogenation catalyst is particularly suitable for residue oil hydrodenitrogenation processes, and has characteristics of strong metal-tolerant capacity, high desulfurization, high denitrification 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 for a residue hydrodenitrogenation catalyst and a preparation method thereof. Background technique [0002] The current residual oil hydrotreating technology is mainly to provide raw materials for the catalytic cracking process, and the nitrogen content of the residual oil hydrotreating product is not high, the nitrogen content can be as high as 1000μg / g or more, and the metal content is not high. However, the operating cycle of the residual oil hydrotreating unit is generally only one year. In order to make the residue hydrotreated product meet the requirements of hydrocracking raw materials, it is necessary to greatly reduce the nitrogen and metal content in the residue hydrotreated product. From the perspective of 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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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