Dual-porous alumina carrier, demetallization catalyst and preparation method thereof

A technology of alumina carrier and double pores, which is applied in metal/metal oxide/metal hydroxide catalysts, catalyst activation/preparation, physical/chemical process catalysts, etc., can solve the problem of lower carrier utilization and reaction molecules staying in pores Short time in the channel, large pore size, etc., to achieve the effects of improving permeability, facilitating mass transfer and diffusion, and high metal capacity

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

Although the alumina support prepared by this technology has a double pore distribution, the pore size of the large pores is relatively large, resulting in a short time for the reaction molecules to stay in the pores, which reduces the utilization rate of the support.

Method used

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  • Dual-porous alumina carrier, demetallization catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 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 450°C for 6 hours to prepare alumina.

[0036] Weigh 50 grams of the above-mentioned alumina and place it in 250 grams of ammonium bicarbonate aqueous solution with a mass concentration of 12%, transfer the mixed material into an autoclave, seal it, heat it at 140°C for 6 hours, and then dry the carrier at 110°C for 6 hours. The aluminum oxide was submerged in a 25% polyethylene glycol-6000 (molecular weight: 6000) solution for 1.5 hours, and then the carrier was dried at 120°C for 6 hours to obtain rod-shaped alumina clusters.

[0037] Weigh 120 grams of pseudo-boehmite A1 (manufactured by Wenzhou Jingjing Alumina Co., Ltd., with a dry weight content of 70%), 30 grams of the above-mentioned rod-shaped alumina clusters, and 1.5 grams of scallop powder, and mix the above-mentioned materials evenly. Add an appropriate amount of aq...

Embodiment 2

[0039] Same as Example 1, except that the calcination temperature of pseudo-boehmite is 550°C. The consumption of ammonium bicarbonate solution is 200 grams, and the mass concentration of solution is 15%. The heat treatment temperature was 160° C., and the treatment time was 4 hours. The polyethylene glycol-6000 solution was changed to polyethylene glycol-2000 (that is, the molecular weight is 2000) solution, and the mass concentration was 30%. The amount of rod-shaped alumina clusters added was 24 grams, and the dual-porous alumina carrier A2 of the present invention was obtained. The properties of the carrier are shown in Table 1.

Embodiment 3

[0041] Same as Example 1, except that the roasting temperature of pseudo-boehmite is 500°C. The consumption of ammonium bicarbonate solution is 400 grams, and the mass concentration of solution is 8%. The heat treatment temperature was 130° C., and the treatment time was 7 hours. The polyethylene glycol-6000 solution was changed to polyethylene glycol-12000 (that is, the molecular weight is 12000) solution, and the mass concentration was 20%. The amount of rod-shaped alumina clusters added was 42 grams, and the dual-porous alumina carrier A3 of the present invention was obtained. The properties of the carrier are shown in Table 1.

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Abstract

The invention discloses a double hole alumina carrier, a hydrogenation demetallization catalyst and a preparation method thereof. The double-porous alumina carrier contains rod-shaped alumina clusters, and the rod-shaped alumina clusters are formed by the disordered interlacing of rod-shaped alumina. The preparation method of the dual-porous alumina 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. The material is dried to obtain rod-shaped alumina clusters; then the pseudo-boehmite B is kneaded with the rod-shaped alumina clusters obtained above to form, and the molded product is dried and calcined to obtain a double-porous alumina carrier. The double hole alumina support prepared by the method has higher pore volume and unique double hole distribution. The hydrodemetallization catalyst prepared by the carrier not only ensures the activity of the catalyst, but also makes the catalyst have good stability.

Description

technical field [0001] The present invention relates to an alumina carrier, a catalyst containing the carrier and a preparation method thereof, in particular to a double-porous alumina carrier, a hydrodemetallization catalyst and a preparation method thereof, the catalyst is particularly suitable for preparing residual oil in the hydrogen treatment process. Background technique [0002] With the intensification of crude oil deterioration and heaviness, the efficient conversion of heavy oil and the improvement of the yield of light oil products have become an important trend in the development of refining technology. The fixed bed hydrogenation technology of residual oil is an effective means to realize the efficient conversion of heavy oil. Adopting this technical route can effectively remove impurities such as metals, sulfur, nitrogen and residual carbon in residual oil, provide high-quality feed for catalytic cracking, and meet stricter environmental protection regulation...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/04B01J35/10B01J37/08B01J37/10B01J37/02B01J23/888B01J23/882B01J23/883C10G45/08
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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