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Preparation method of alumina supporter

An alumina carrier and system technology, which is applied in catalyst carriers, chemical instruments and methods, alumina/aluminum hydroxide, etc., can solve the problems of low mechanical strength, small pore volume and pore size of the carrier, and is suitable for industrial applications. Simple preparation method, high specific surface area effect

Active Publication Date: 2013-01-09
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 method has a large specific surface area, its

Method used

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Examples

Experimental program
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Effect test

preparation example Construction

[0024] A kind of preparation method of aluminum oxide carrier of the present invention, concrete preparation process is as follows:

[0025] Weigh an appropriate amount of Al(NO 3 ) 3 Dissolve in deionized water, add dropwise ammonia solution with a mass concentration of 2.5% until the pH of the system is > 9.0, filter the obtained precipitate with suction, wash the filter cake with deionized water until it is neutral, then transfer it to a beaker, add an appropriate amount of After stirring with deionized water for 0.5 hours, add an appropriate amount of nitric acid solution dropwise, and continue stirring at a temperature above 70°C for at least 2 hours to obtain aluminum sol; The glue is dried in an oven at 120°C for 3 hours; the obtained dry powder is mixed with an appropriate amount of water, peptizer, and extrusion aid evenly, extruded into a strip, and the formed carrier is dried in an oven at 120°C for 2-4 hours; the dry carrier is transferred to a muffle furnace In ...

example 1

[0027] Weigh 375gAl(NO 3 ) 3 9H 2 O was dissolved in deionized water, and a mass fraction of 2.5% ammonia solution was added dropwise until the system pH>9.0, the obtained precipitate was separated by suction filtration, washed with deionized water until neutral, and the obtained filter cake was transferred to a beaker, Add an appropriate amount of deionized water and stir for 0.5 hours, then dropwise add 100ml of 1mol / L nitric acid solution, continue stirring at 70°C for 2 hours to obtain aluminum sol, add 1L of glucose with a concentration of 1mol / L to the obtained aluminum sol, and make the sugar and sol The molar ratio of aluminum in the system is 1:1, after stirring for 0.5 hours, it is aged at room temperature for 3 hours, and the gel is dried in an oven at 120°C for 3 hours; the obtained dry powder is mixed with appropriate amount of water, nitric acid, and scallion powder, and extruded Forming, the formed carrier is dried in an oven at 120°C for 2-4 hours; the dried ...

example 2

[0029] Same as Example 1, except that 1 L of mixed solution of 3 mol / L sucrose and glucose (the molar ratio of sucrose and glucose is 1:1) was added to the obtained aluminum sol, so that the molar ratio of aluminum in the sugar to sol system was 1:3, The alumina carrier B2 provided by the present invention is obtained.

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Abstract

The invention discloses a preparation method of an alumina supporter. The preparation method comprises the steps of a sol solidification process, a shaping process and a roasting process, a sugar solution with a concentration of 1-5mol/L is added in a sol system in the sol solidification process, and a molar ratio of sugar to aluminum in the sol system is 1-6. The alumina supporter prepared by the preparation method has a high hole volume and a high hole diameter, has concentrated hole distribution, has moderate mechanical strength, and is applicable to serving as a supporter of a heavy oil hydrotreating catalytic agent.

Description

technical field [0001] The invention relates to a method for preparing an alumina carrier, in particular to a method for preparing an alumina carrier with large pore volume, pore diameter and concentrated pore distribution. 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. Catalysts with larger pore volume and larger pore diameter have strong metal and carbon capacity, which can slow down the deactivation of the catalyst and prolong the operation period of the catalyst. Alumina is a commonly used catalyst carrier, widely used in petroleum processing, chemical industry, environmental protection and other fields. The alumina that is usually used to prepare hydrotreating catalysts and the pore diameter of commercially available alumina are small, which cannot meet the needs of preparing heavy oil, resid...

Claims

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Application Information

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IPC IPC(8): B01J32/00B01J21/04C01F7/02
Inventor 孟雪松陈琳凌凤香王少军
Owner CHINA PETROLEUM & CHEM CORP
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