Carrier, catalyst and preparation method for hydrodesulfurization

Abstract

The invention discloses a carrier, a catalyst and a preparation method for hydrodesulfurization. The carrier is an alumina carrier, which contains rod-shaped alumina clusters, the length of the rod-shaped alumina is 1-4µm, the diameter is 100-300nm, and the outer diameter of the rod-shaped alumina cluster is 5-18µm; the rod-shaped Alumina clusters account for 5%-14% of the weight of the alumina carrier. The preparation method of the carrier comprises: roasting pseudo-boehmite A to obtain alumina; immersing the alumina in an aqueous solution of ammonium bicarbonate for sealing and heat treatment, drying, and immersing in polyethylene glycol solution, and drying the material after immersion, Rod-shaped alumina clusters are obtained; then pseudo-boehmite B is kneaded with the above-obtained rod-shaped alumina clusters to form, and the formed product is dried and calcined to obtain a carrier. The hydrodesulfurization catalyst is especially suitable for the hydrodesulfurization treatment process of residual oil, and has the characteristics of good macromolecule diffusion performance, strong metal-accommodating capacity and high desulfurization capacity.

Description

technical field

[0001] The invention relates to an alumina carrier, a catalyst and a preparation method thereof, in particular to a catalyst carrier, a catalyst and a preparation method thereof for residual oil hydrodesulfurization. Background technique

[0002] With the increasingly heavy and poor quality of petroleum, it brings more and more difficulties to petroleum processing. Heavy oil residues contain a large amount of sulfur, most of which exist in asphaltene, which is a component that is difficult to remove. As an important process in petroleum refining and synthetic ammonia production using petroleum as raw material, hydrodesulfurization has always been valued by people. However, in recent years, the quality of petroleum has become heavier and worse, while the requirements for product quality have become more stringent, and the requirements for feed materials in subsequent processes have become more and more stringent. In addition, since mankind entered the 21st c...

Examples

Embodiment 1

[0038] 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 460°C for 5.5 hours to prepare alumina.

[0039] Weigh 50 grams of the above-mentioned alumina and place it in 200 grams of 18% ammonium bicarbonate aqueous solution, transfer the mixture into an autoclave, seal it, heat it at 120°C for 6 hours, and then dry the carrier at 115°C for 6 hours. The above-mentioned alumina was immersed in a polyethylene glycol-6000 solution with a mass concentration of 15% and soaked for 1.5 hours, and then the carrier was dried at 118°C for 6 hours to obtain rod-shaped alumina clusters.

[0040] Weigh 120 grams of pseudo-boehmite A1 (manufactured by Wenzhou Jingjing Alumina Co., Ltd., with a weight content of 70% on a dry basis), 10 grams of the above-mentioned rod-shaped alumina clusters, and 1.5 grams of scallop powder, and mix the above-mentioned materials evenly , adding an appropriate amount o...

Embodiment 2

[0043] Same as Example 1, except that the calcination temperature of pseudo-boehmite A1 is 540°C. The consumption of ammonium bicarbonate solution is 150 grams, and the mass concentration of solution is 15%. The heat treatment temperature is 145° C., and the treatment time is 8 hours. Polyethylene glycol-6000 was changed to polyethylene glycol-2000, and the mass concentration was 20%. The amount of rod-shaped alumina clusters added was 12 grams, and alumina carrier Z2 and hydrodesulfurization catalyst C2 were obtained. The properties of alumina carrier Z2 are shown in Table 1.

Embodiment 3

[0045] Same as Example 1, except that the roasting temperature of pseudo-boehmite is 510°C. The consumption of ammonium bicarbonate solution is 300 grams, and the mass concentration of solution is 10%. The heat treatment temperature was 110° C., and the treatment time was 8 hours. Polyethylene glycol-6000 was changed to polyethylene glycol-12000, and the mass concentration was 25%. The amount of rod-shaped alumina clusters added was 13 grams, and alumina carrier Z3 and hydrodesulfurization catalyst C3 were obtained. The properties of alumina carrier Z3 are shown in Table 1.

technical field

[0001] The invention relates to an alumina carrier, a catalyst and a preparation method thereof, in particular to a catalyst carrier, a catalyst and a preparation method thereof for residual oil hydrodesulfurization. Background technique

[0002] With the increasingly heavy and poor quality of petroleum, it brings more and more difficulties to petroleum processing. Heavy oil residues contain a large amount of sulfur, most of which exist in asphaltene, which is a component that is difficult to remove. As an important process in petroleum refining and synthetic ammonia production using petroleum as raw material, hydrodesulfurization has always been valued by people. However, in recent years, the quality of petroleum has become heavier and worse, while the requirements for product quality have become more stringent, and the requirements for feed materials in subsequent processes have become more and more stringent. In addition, since mankind entered the 21st c...

Examples

Embodiment 1

[0038] 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 460°C for 5.5 hours to prepare alumina.

[0039] Weigh 50 grams of the above-mentioned alumina and place it in 200 grams of 18% ammonium bicarbonate aqueous solution, transfer the mixture into an autoclave, seal it, heat it at 120°C for 6 hours, and then dry the carrier at 115°C for 6 hours. The above-mentioned alumina was immersed in a polyethylene glycol-6000 solution with a mass concentration of 15% and soaked for 1.5 hours, and then the carrier was dried at 118°C for 6 hours to obtain rod-shaped alumina clusters.

[0040] Weigh 120 grams of pseudo-boehmite A1 (manufactured by Wenzhou Jingjing Alumina Co., Ltd., with a weight content of 70% on a dry basis), 10 grams of the above-mentioned rod-shaped alumina clusters, and 1.5 grams of scallop powder, and mix the above-mentioned materials evenly , adding an appropriate amount o...

Embodiment 2

[0043] Same as Example 1, except that the calcination temperature of pseudo-boehmite A1 is 540°C. The consumption of ammonium bicarbonate solution is 150 grams, and the mass concentration of solution is 15%. The heat treatment temperature is 145° C., and the treatment time is 8 hours. Polyethylene glycol-6000 was changed to polyethylene glycol-2000, and the mass concentration was 20%. The amount of rod-shaped alumina clusters added was 12 grams, and alumina carrier Z2 and hydrodesulfurization catalyst C2 were obtained. The properties of alumina carrier Z2 are shown in Table 1.

Embodiment 3

[0045] Same as Example 1, except that the roasting temperature of pseudo-boehmite is 510°C. The consumption of ammonium bicarbonate solution is 300 grams, and the mass concentration of solution is 10%. The heat treatment temperature was 110° C., and the treatment time was 8 hours. Polyethylene glycol-6000 was changed to polyethylene glycol-12000, and the mass concentration was 25%. The amount of rod-shaped alumina clusters added was 13 grams, and alumina carrier Z3 and hydrodesulfurization catalyst C3 were obtained. The properties of alumina carrier Z3 are shown in Table 1.

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