Silica-alumina composite carrier and method for preparing same

A technology of alumina carrier and composite carrier, which is applied in catalyst activation/preparation, catalyst carrier, chemical instruments and methods, etc., to achieve the effect of prolonging the operation period, increasing the deposition amount, and good pore penetration.

Active Publication Date: 2010-11-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] CN1597093A adopts uniform co-precipitation method, adding sodium silicate solution to sodium aluminate solution, passing CO 2 Gas neutralization for precipitation to obtain amorphous silica-alumina with a maximum pore volume of 1.2ml / g and an average pore diameter of less than 10nm. This material is not suitable for residual oil macromolecular catalysis

Method used

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  • Silica-alumina composite carrier and method for preparing same
  • Silica-alumina composite carrier and method for preparing same
  • Silica-alumina composite carrier and method for preparing same

Examples

Experimental program
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Effect test

Embodiment 1

[0051] Under stirring conditions, 750g of aluminum nitrate nonahydrate and 130g of urea were mixed and heated to 100°C, and added to the mixture of 80g of polyisobutylene maleate triethanolamine maleate and 148g of 150HVI neutral oil at the same temperature to form supersolubilizing micelles , and then dropwise added 34.8g of silica sol (the weight content of silicon dioxide is 30%), mixed uniformly, and reacted at 130° C. for 10 hours to obtain nanometer silicon hydroxide-aluminum hydroxide gel. Wash three times with 200ml of distilled water, and dry at 120°C for 8 hours. Mix 104 g of nano silicon hydroxide-aluminum hydroxide gel dry powder and 30 g of pseudo-boehmite evenly. Mix 6g dilute nitric acid (mass concentration 17%), 60g water and 10g ethanol uniformly, then add in the mixture of nano silicon hydroxide-aluminum hydroxide gel dry powder and binder, stir well, mix on the mixer Uniform, and then shaped in the extruder, the pressure is controlled at 10MPa. The formed ...

Embodiment 2

[0053] The silica-alumina composite carrier SA1 obtained in Example 1 is impregnated with active metals, and the obtained residual oil hydrogenation catalyst HDN-1 contains 14% (mass fraction) Mo, 4% (mass fraction) Ni, and the appearance is shown in image 3 , pore distribution see Figure 4 .

[0054] The residual oil hydrogenation catalyst HDN-1 was used in the hydrodemetallization experiment of the residual oil raw material (properties are shown in Table 1), and the test conditions were as follows: temperature 390°C, hydrogen-to-oil volume ratio 1000, liquid hourly volume space velocity 1.0h -1 , hydrogen partial pressure 15.7MPa, continuous operation for 1500 hours. Investigate the demetallization properties in the residual oil, the weight content of metal impurities in the oil produced at different reaction times, see Figure 5 .

Embodiment 3

[0062]Mix 56g minus three-line dewaxed oil and 16g SP-80, heat to dissolve at 80°C, and mix well; heat 750g of aluminum nitrate nonahydrate to 80°C to melt, slowly add to the above mixture, and mix for 20 minutes to form a uniform supersolubilizing colloid. Then 148g of silica sol (the weight content of silicon dioxide is 30%) was added dropwise, and mixed evenly. 220 g of saturated ammonia water at 20° C. was added dropwise and aged for 3 hours to obtain a nano silicon hydroxide-aluminum hydroxide gel. Wash three times with 200ml of distilled water, and dry at 120°C for 10 hours. Mix 138.8g of nano-silica hydroxide-aluminum hydroxide gel dry powder with 92.5g of pseudo-boehmite; mix 2.31g of acetic acid, 189g of water and 2.31g of co-solvent methanol, and then add to nano-silica-hydroxide- In the mixture of aluminum hydroxide gel dry powder and binder, stir evenly, mix evenly on the mixer, and then shape it in the extruder, control the pressure at 30MPa. The molded product ...

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Abstract

The invention discloses a silica-alumina composite carrier and a method for preparing the same. The composite carrier is prepared from a silicon hydroxide-aluminum hydroxide gel serving as a raw material by using a super-solubility micelle method. Because the gel contains a surfactant and hydrocarbon components, silica nanoparticles and alumina nanoparticles formed after dehydration of polymerized silicon hydroxide and aluminum hydroxide still have rod-like basic structures after shaping and roasting, and the nanoparticles are disorderly stacked into a frame structure. The composite carrier has large pore volume, large aperture, high porosity, large orifices on outer surface and high pore penetrability, and particularly for high molecules, the carrier can prevent a catalyst from becoming inactivated due to blockage of the orifices, contribute to increasing the deposition of impurities and prolong the operating period of the catalyst because the carrier does not have orifices similar to ink bottle-shaped orifices. The composite carrier can be used in catalytic reactions comprising high molecular reactants or products.

Description

technical field [0001] The invention relates to a silica-alumina composite carrier and a preparation method thereof, in particular to a silica-alumina composite carrier capable of allowing residue oil to penetrate through large pores and a preparation method thereof. Background technique [0002] At present, hydroprocessing is still the most important means to produce high-quality, environment-friendly petroleum products. The core of hydroprocessing technology is the catalyst, and the performance of the carrier is the key to preparing a hydroprocessing catalyst with excellent properties. For the heavy components of petroleum (such as VGO, especially residual oil), the pore size and pore volume of the carrier will directly affect the catalyst activity. [0003] So far, the catalyst carrier used in the fixed bed of residual oil is still the classic alumina carrier. High temperature calcination method, pH value swing method and water vapor treatment can all obtain macroporous...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J32/00B01J21/12B01J35/10B01J37/00C10G45/04
Inventor 王鼎聪刘纪端
Owner CHINA PETROLEUM & CHEM CORP
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