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Aluminum oxide carrier and preparation method thereof

A technology of alumina carrier and acid aluminum, applied in catalyst carrier, chemical instrument and method, chemical/physical process, etc., can solve the problems of dispersed pore distribution, unsuitability, low proportion, etc.

Active Publication Date: 2015-04-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The alumina carrier prepared by the above method has relatively dispersed pore distribution, especially the proportion of 10-20 nm pores in the total pore volume is low, so it is not suitable as a carrier for heavy oil hydrogenation catalysts

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0021] Measure 1L of 1M aluminum nitrate aqueous solution and place it in a water bath, control the temperature at 60°C, add an appropriate amount of 1M ammonium carbonate aqueous solution to the aluminum nitrate solution under magnetic stirring conditions, and control the amount of alkaline precipitant to make the slurry The pH value was 9, neutralized for 1 hour. Add water-soluble resin with 5% of the mass of the slurry to the obtained precipitation slurry, then transfer the mixed material to a microwave reactor at 90°C, the aging time is 1.5 hours, and the mass ratio of the microwave power used to the precipitation slurry is 200 W / g , microwave frequency 2500MHz. The aged material was filtered, washed, and dried at 120° C. for 10 hours. The dried material is evenly kneaded with an appropriate amount of scallop powder and peptizer to form a plastic material, which is extruded by an extruder. The formed strip wet material was dried at 120 for 8 hours. The dried molded prod...

example 2

[0023] Same as Example 1, except that the addition of the water-soluble resin is 10% of the mass of the mixed material, the aging temperature is 120°C, the aging time is 1 hour, the mass ratio of the microwave power to the precipitation slurry is 130 watts / gram, and the microwave frequency 1500MHz. The average pore diameter of the obtained alumina carrier is 15 nanometers, the possible pore diameter is 13 nanometers, and the pore volume of the pores of 10-20 nanometers accounts for 76% of the total pore volume.

example 3

[0025] Same as Example 1, except that the addition of water-soluble resin is 7% of the mass of the mixed material, the aluminum salt is aluminum chloride, the precipitating agent is sodium hydroxide, the aging temperature is 110 ° C, the aging time is 2 hours, and the microwave power used The mass ratio to the precipitation slurry is 80 W / g, and the microwave frequency is 2100MHz. The average pore diameter of the obtained alumina carrier is 13 nanometers, the possible pore diameter is 12 nanometers, and the pore volume of the pores of 10-20 nanometers accounts for 68% of the total pore volume.

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Abstract

The invention discloses a preparation method of an aluminum oxide carrier. The preparation method comprises the following steps: firstly, performing neutralization reaction on an alkaline aqueous precipitator solution and an acidic aqueous aluminium salt solution to obtain precipitate slurry; secondly, adding water-soluble resin into the precipitate slurry, and performing aging treatment through microwave heating; finally, filtering, washing, drying and shaping the aged mixed material to obtain the final aluminum oxide carrier. The aluminum oxide carrier prepared by adopting the preparation method has a relatively large aperture and concentrated pore distribution, especially 10-20nm pores account for a large proportion of the total pore volume; the aluminum oxide carrier is suitable for being used as the carrier for a heavy oil hydrogenation catalyst.

Description

technical field [0001] The invention relates to an alumina carrier and a preparation method thereof, in particular to a large-pore alumina carrier with concentrated pore distribution and a preparation method thereof. Background technique [0002] With the continuous reduction of oil resources and the increasing trend of heavy and inferior crude oil, heavy oil deep processing technology has been highly valued by refiners at home and abroad. Macroporous alumina is beneficial to the mass transfer and diffusion of organic macromolecules. In addition, it has a high capacity for metal storage and carbon deposition. It is widely used as a hydrogenation catalyst carrier in the field of heavy and residual oil hydrogenation. With the deepening of the research on the catalytic mechanism, it is increasingly clear that it is not the total pore volume of the catalyst that affects the performance of the catalytic reaction, but its pore distribution, that is, the effective pore volume. Dif...

Claims

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Application Information

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IPC IPC(8): B01J32/00B01J21/04
Inventor 季洪海沈智奇凌凤香王少军杨卫亚王丽华郭长友
Owner CHINA PETROLEUM & CHEM CORP
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