Alumina supporter, and preparation method and application thereof

A technology of alumina carrier and alumina, which is applied in the direction of catalyst carrier, chemical instrument and method, metal/metal oxide/metal hydroxide catalyst, etc., can solve the problem of large difference in properties of pseudo-boehmite dry rubber powder, Affect the properties of the carrier and the application effect, etc., to achieve the effect of high-efficiency demetallization performance, reduced damage, and improved crushing strength

Active Publication Date: 2013-04-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although the alumina carrier with double pore structure is prepared by adding two different pseudo-boehmite dry rubber powders in the above method, the properties of the different pseudo-boehmite dry rubber powders added are quite different. It may affect the properties of the carrier after molding and its application effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0025] Weigh an appropriate amount of pseudo-boehmite dry glue (produced by Shenyang Catalyst Factory) powder, place it in a muffle furnace, and bake it at 500°C and 800°C for 3 hours to make alumina dry powder; weigh 20 grams of alumina baked at 500°C powder is mixed with 80 grams of alumina powder roasted at 800 ° C, and 10 grams of pseudoboehmite, 4 grams of scallop powder and an appropriate amount of aqueous solution dissolved in 5 grams of concentrated nitric acid are added to the above-mentioned mixture and kneaded evenly to form a plastic material. Extruded by extruder; the formed strip-shaped wet material was dried at 120°C for 2 hours, and the dried shaped product was calcined at 500°C for 3 hours to obtain the alumina carrier B1 provided by the present invention.

example 2

[0027] Same as Example 1, except that the roasting temperature is 450°C and 700°C respectively, the additions of the two kinds of oxide powders are respectively 30 grams and 70 grams, and the additions of pseudo-boehmite are 20 grams, and the aluminum oxide provided by the invention is obtained Carrier B2.

example 3

[0029] Same as Example 1, except that the roasting temperature is 450°C and 900°C respectively, the additions of the two kinds of oxide powders are respectively 40 grams and 60 grams, and the additions of pseudo-boehmite are 15 grams, so that the aluminum oxide provided by the invention is obtained Vector B3.

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PUM

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Abstract

The invention discloses an alumina supporter and a preparation method thereof. The specific area of the supporter is 170-200 m<2>/g, the pore volume is 0.85-1.0 mL/g, the pores with the diameter of 10-25 nm account for 40-50% of the total pore volume, the pores with the diameter of 100-250 nm account for 25-35% of the total pore volume, and the crushing strength is 200-220 N/cm. The preparation method comprises the following steps: respectively roasting one quasi-boehmite dry gelatine powder at 450-600 DEG C and 700-900 DEG C for 3-5 hours to prepare two alumina dry powders; weighing the two alumina dry powders, evenly mixing with the quasi-boehmite dry gelatine powder (the same quasi-boehmite dry gelatine powder), extrusion aid and peptizator, extruding into strips and molding; and drying and roasting the molded material to obtain the alumina supporter. The alumina supporter has the advantages of large pore volume, proper specific area and proper mechanical strength, has a double pore structure, and thus, is suitable to be used as a hydrogenation protecting agent for heavy oil and a supporter of a demetallization catalyst. In addition, the preparation method is simple, and is suitable for industrial application.

Description

technical field [0001] The invention relates to an alumina carrier and its preparation method and application, in particular to an alumina carrier with a double pore structure, high specific surface area and mechanical strength, its preparation method and application. Background technique [0002] Today, the world's crude oil is gradually becoming heavier, and the market demand for light oil products is increasing rapidly. The deep processing and utilization of heavy oil has been highly valued worldwide. Heavy residue hydrodemetallization catalysts generally use alumina as a carrier with large pore volume, large pore diameter, and double pore structure, so that it has both large pores that facilitate the migration of macromolecules and small pores that provide catalytic effects. [0003] CN1488441A discloses a preparation method of alumina carrier. Two different pseudo-boehmite dry rubber powders are evenly mixed, then peptized, shaped, dried, and calcined at 550°C-1200°C f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J32/00B01J21/04B01J23/883B01J35/10C10G45/08
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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