Preparation method of macroporous aluminum oxide with diplopore distribution

A technology of macroporous alumina and double-pore distribution, which is applied in chemical instruments and methods, catalyst carriers, chemical/physical processes, etc., can solve the problems of low mechanical strength, low crushing strength, and low ratio of large pores, and achieve the goal of overcoming Effects of low mechanical strength, high surface energy, and large surface area

Inactive Publication Date: 2008-07-09
SHANGHAI SECOND POLYTECHNIC UNIVERSITY
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0006] The invention discloses a method for preparing macroporous alumina with double-pore distribution, the purpose of which is to overcome the low macroporous ratio existing in the above alumina carrier preparation method, which is difficult to meet the process of mac

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0023] Example 1: After ball milling 80g of pseudo-boehmite, 6.4g of carbon black powder, and 2.4g of white carbon black in a ball mill at a ball-to-material ratio of 15:1 for 2h, use cetyltrimethylammonium bromide containing 1.6 g. After the aqueous solution of 0.4g of methylcellulose is fully mixed, extrude it into strips with a diameter of 1.5mm on a screw extruder, treat it in a steam atmosphere at 120°C for 1h, and dry it in a muffle furnace Calcined at 800° C. for 3 h to obtain carrier A.

Embodiment 2

[0024] Embodiment 2: 80g of pseudo-boehmite, carbon black powder 10g, and white carbon black 4g were ball-milled for 4 hours at a ball-to-material ratio of 15:1 in a ball mill, and then treated with cetyltrimethylammonium bromide containing 2.8g, After the aqueous solution of 0.4g of methylcellulose is fully mixed, extrude it into strips with a diameter of 1.0mm on a screw extruder, treat it in a steam atmosphere at 180°C for 6h, and dry it in a muffle furnace at 800°C Lower calcined for 3h to obtain carrier B.

Embodiment 3

[0025] Embodiment 3: 80g of pseudo-boehmite, 8g of carbon black powder, and 2.4g of white carbon black were ball-milled for 2 hours at a ball-to-material ratio of 15:1 in a ball mill, and then treated with 4g of cetyltrimethylammonium bromide, After the aqueous solution of 0.4g of ethyl cellulose is fully mixed, extrude it into strips with a diameter of 1.2mm on a screw extruder, treat it in a steam atmosphere at 150°C for 3 hours, and dry it in a muffle furnace at 800°C Lower roasting for 3h to obtain carrier C.

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Abstract

A preparation method of a large-pore aluminum oxide with double-pore spread structure. First, aluminum oxide, a poreforming agent and solid silica are mixed, and receive ball-milling treatment in a ball milling machine; the mixture after treatment is kneaded into a plastic body by aqueous solution with cationic surfactant, extrusion aid, peptizator, etc. dissolved in, and put into the water vapor atmosphere to be treated; and the prepared mould is dried and baked, to obtain the final aluminum oxide carrier. The poreforming agent is one or the mixture of carbon black, cellulose and starch, and the loading is 3.0 to 15w percent of the weight of the aluminum oxide; the solid silica is silica aerogel, and the loading is 1.0 to 10w percent of the weight of the aluminum oxide; in the ball milling machine, the ball-material ratio is 15:1 to 10:1, and the ball milling time is 0.5 to 3.0h; the treatment temperature of the water vapor is 120 DEG C to 180 DEG C, and the treatment time is 0.5 to 6.0h. The aluminum oxide prepared by the invention has double-peak channel structure and high strength, and is applicable in fields of petrochemical, petroleum processing, environmental protection, etc.

Description

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Claims

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Application Information

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Owner SHANGHAI SECOND POLYTECHNIC UNIVERSITY
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