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Preparation method of alumina supporter with concentrated hole distribution

An alumina carrier and a certain amount of technology, applied in catalyst carriers, chemical instruments and methods, alumina/aluminum hydroxide, etc., can solve the problems of reduced pore volume, low average pore size of alumina carrier, etc., and achieve large pore volume. , suitable for industrial production and application, the effect of reducing production costs

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

However, the average pore size of the alumina carrier prepared by this method is relatively low, about 11nm. In addition, there is also the disadvantage that the pore volume of the carrier is reduced due to high temperature hydrothermal treatment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0020] Weigh 100g of pseudo-boehmite dry rubber powder (produced by Shenyang Catalyst Factory, alumina dry basis content 65%), add ammonia solution with a mass concentration of 1% and mix evenly, the amount of ammonia solution added is 100% of the dry rubber powder weight, transfer the mixed material into an autoclave, heat the sealed autoclave to a constant temperature of 120°C for 2 hours; Pseudo-boehmite after hydrothermal treatment, 2g of turnip powder, an appropriate amount of aqueous solution containing 3g of nitric acid Mix and knead evenly to form a plastic material; extrude and shape through an extruder; dry the formed strip wet material at 120°C for 3 hours; roast the dried molded product at 700°C for 3 hours to obtain the alumina provided by the invention Carrier B1.

example 2

[0022] Same as example 1, just adding the ammonia solution whose mass concentration is 3%, the addition of the ammonia solution is 80% of the weight of the pseudo-boehmite dry rubber powder, and the sealed autoclave is heated to 130°C at a constant temperature for 3 hours; the present invention provides alumina carrier B2.

example 3

[0024] Same as Example 1, just add the ammonia solution whose mass concentration is 10%, the addition of ammonia solution is 50% of the weight of pseudo-boehmite dry rubber powder, and the sealed autoclave is heated to 140 ℃ constant temperature for 5 hours; alumina carrier B3.

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PUM

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Abstract

The invention relates to a preparation method of an alumina supporter. The preparation method comprises the steps of weighing a certain quality of pseudo-boehmite dry glue powders, evenly mixing the pseudo-boehmite dry glue powders with a certain quality of aqueous solution of ammonia, placing mixing materials in a sealing container for hydro-thermal treatment, conducting molding, drying and roasting on the materials after the hydro-thermal treatment to prepare the alumina supporter. A mass concentration of the aqueous solution of ammonia is 1%-10%, and the adding quantity of the aqueous solution of ammonia is 50-100% of that of the pseudo-boehmite dry glue powder. The hydro-thermal treatment adopts forcing hydro-thermal type, the pressure of the hydro-thermal treatment is self-generated at a hydro-thermal treatment temperature, and the hydro-thermal treatment temperature is 100 DEG C-150 DEG C, a hydro-thermal treatment time is 1-5 hours. The alumina supporter prepared by the preparation method has a large hole volume and a large hole diameter, has concentrated hole distribution, has moderate mechanical strength, and the alumina supporter is applicable to the field preparation of heavy oil and residual oil hydrodemetallization catalyst and the like.

Description

technical field [0001] The invention relates to a method for preparing an alumina carrier with concentrated pore distribution, in particular to a method for preparing an alumina carrier with large pore volume and diameter, suitable mechanical strength and concentrated pore distribution. Background technique [0002] At present, in the production process of heavy oil hydrodemetallization, because the raw oil contains a certain amount of impurities such as vanadium, sulfur, arsenic, nickel, etc., it is easy to form deposits, thereby blocking the pores of the catalyst, resulting in a rapid decline in catalyst activity. Even inactivation affects industrial applications. 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. The pore structure of the catalyst is determined by the carrier that constitutes the catalyst. Therefore, the pr...

Claims

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Application Information

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IPC IPC(8): B01J32/00B01J21/04B01J35/10C01F7/02
Inventor 王少军凌凤香季洪海崔晓丽吴洪新赵国利
Owner CHINA PETROLEUM & CHEM CORP
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