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A kind of alumina carrier and preparation method thereof

An alumina carrier, alumina technology, applied in the field of catalysis, can solve the problems of catalyst pore blockage, catalyst deactivation, etc., and achieve the effects of reducing impact, uniform pore channels, and prolonging operation cycle.

Active Publication Date: 2022-02-08
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The pores of the alumina carrier prepared by this technology are uniformly distributed in the radial direction of the catalyst, and during the hydrodemetallization reaction, metal impurities such as nickel and vanadium in the metal compound are deposited on the surface and near the surface of the catalyst, resulting in the loss of catalyst pores. clogging, thereby deactivating the catalyst

Method used

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  • A kind of alumina carrier and preparation method thereof
  • A kind of alumina carrier and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Weigh 285 grams of pseudo-boehmite (produced by Wenzhou Jingjing Alumina Co., Ltd., with a dry weight content of 70wt%), 3 grams of carbon black powder, and 1 gram of scallop powder. The aqueous solution of 3 grams of acetic acid is mixed and kneaded, extruded, and the formed product is dried at 140°C for 6 hours, and the dried product is roasted at 700°C for 5 hours to obtain an alumina support intermediate. The properties of the alumina support intermediate are as follows: the specific surface area is 176m 2 / g, the pore volume is 0.82mL / g, and the pore distribution is as follows: the pore volume of pores with a pore diameter less than 8nm accounts for 44% of the total pore volume, and the pore volume of pores with a pore diameter of 8-20nm accounts for 45% of the total pore volume. The pore volume of pores above 100nm accounts for 8% of the total pore volume, and the pore volume of pores above 1000nm is less than 1% of the total pore volume.

[0042] Weigh 100 grams ...

Embodiment 2

[0044] With embodiment 1, just the add-on of ammonium bicarbonate is 232 grams, and the add-on of distilled water is 995 grams. The sealing pretreatment temperature is 60° C., the treatment time is 4 hours, the heat treatment temperature is 150° C., and the treatment time is 8 hours. Alumina carrier A2 was prepared, and the properties of the carrier are shown in Table 1. Among them, the rod-shaped alumina on the outer surface of the main alumina is mainly 3-8µm, and the coverage rate accounts for about 84%.

Embodiment 3

[0046] With embodiment 1, just the add-on of ammonium bicarbonate is 155 grams, and the add-on of distilled water is 510 grams. The sealing pretreatment temperature is 100°C, the treatment time is 2 hours, the heat treatment temperature is 160°C, and the treatment time is 4 hours. The alumina carrier A3 of the present invention was obtained, and the properties of the carrier are shown in Table 1. Among them, the rod-shaped alumina on the outer surface of the main alumina is mainly 3-8µm, and the coverage rate accounts for about 77%.

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Abstract

The invention discloses an alumina carrier and a preparation method thereof. The alumina carrier has a novel shape and structure, including main alumina and rod-shaped alumina, wherein at least part of the rod-shaped alumina is distributed on the outer surface of the main alumina carrier, and the rod-shaped alumina is 1-12 µm long and 100-diameter 300nm. The hydrodemetallization catalyst prepared by the alumina carrier not only improves the activity of the catalyst, but also makes the catalyst have good stability, and can prolong the operation period of the device.

Description

technical field [0001] The invention relates to the field of catalysis, in particular to an alumina carrier and a preparation method thereof. The alumina carrier is mainly suitable for preparing a residual oil hydrogenation demetallization catalyst. 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 regulations while increasing production of light oil products. In the process of heavy oil processing, the metal compoun...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J32/00C10G45/02
Inventor 季洪海凌凤香王少军张会成沈智奇杨卫亚郭长友王丽华
Owner CHINA PETROLEUM & CHEM CORP
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