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Shaping method of aluminum oxide carrier

A technology of alumina carrier and molding method, applied in catalyst carrier, chemical instrument and method, chemical/physical process, etc., can solve the problems of low specific surface area and large loss of raw materials in specific surface area, and achieve high specific surface area and suitable pore distribution. , the effect of high pore volume

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

The catalyst support prepared by this method has high mechanical strength, but the specific surface area is relatively low compared to pseudo-boehmite and / or alumina powder raw materials, and the specific surface area is relatively low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0020] Take by weighing 85 grams of the above-mentioned aluminum oxide dry rubber powder, mix evenly with 4 grams of Selina powder, 3 grams of carbon black powder, and 2 grams of phosphoric acid; weigh 15 grams of SB powder and add an appropriate amount of aqueous solution of 10 grams of nitric acid to fully mix and peptize; The above two mixed materials were kneaded evenly, extruded into rods, dried at 120°C for 24 hours, and calcined at 650°C for 4 hours to obtain the alumina carrier A1 of the present invention. The specific surface of the obtained alumina carrier is 245m 2 / g, pore volume 0.86mL / g, calculable pore diameter 14.6nm, pore distribution 20nm accounted for 11.3%, mechanical strength 171N / cm.

example 2

[0022] Same as Example 1, except that the addition of alumina dry rubber powder is 95 grams, the addition of SB powder is 5 grams, and the addition of nitric acid is 15 grams, making alumina carrier A2 of the present invention. The specific surface of the obtained alumina carrier is 231m 2 / g, pore volume 0.88mL / g, calculable pore diameter 15.2nm, pore distribution 20nm accounted for 12.5%, mechanical strength 165N / cm.

example 3

[0024] Same as Example 1, except that the add-on of macroporous alumina dry rubber powder is 90 grams, the add-on of SB powder is 10 grams, and the add-on of nitric acid is 5 grams, making alumina carrier A3 of the present invention. The specific surface of the obtained alumina carrier is 239m 2 / g, pore volume 0.88mL / g, calculable pore diameter 15.1nm, pore distribution 20nm accounted for 11.9%, mechanical strength 163N / cm.

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PUM

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Abstract

The invention discloses a shaping method of an aluminum oxide carrier. The shaping method comprises the following steps: (1) weighing a proper amount of aluminum oxide dry adhesive powder, a proper amount of an extrusion aid and a proper amount of a pore-enlarging agent, and uniformly mixing; (2) weighing a proper amount of pseudo boehmite dry adhesive powder, a proper amount of adhesive solvent and a proper amount of water, and uniformly mixing and kneading; (3) mixing and kneading, shaping, drying and roasting materials obtained in the step (1) and in the step (2) to obtain the final aluminum oxide carrier, wherein the adding amount of the pseudo boehmite accounts for 5-15% of the total weight of the aluminum oxide dry adhesive powder and the pseudo boehmite dry adhesive powder. The aluminum oxide carrier prepared by adopting the shaping method has relatively high specific surface area and mechanical strength.

Description

technical field [0001] The invention relates to a molding method of an alumina carrier, in particular to a molding method of an alumina carrier with high specific area and high mechanical strength. Background technique [0002] At present, the heavy and residual oil hydrotreating catalysts used in industry generally use macroporous alumina as the carrier, and the metal elements of Group VIII and Group VIB as active components. Larger pore size is conducive to the diffusion of macromolecular reactants in heavy oil, and larger pore volume can improve the ability of the catalyst to accommodate metals and resist carbon deposition. For supported hydrotreating catalysts, the pore structure of the catalyst is basically determined by the pore structure of the support. For the extruded support, first select the appropriate raw material, and then knead, shape, dry, roast and other processes to obtain the final product. Alumina carrier. [0003] CN1179356A discloses a catalyst carrie...

Claims

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Application Information

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IPC IPC(8): B01J32/00B01J35/10B01J21/04
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