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Preparation method of double-hole-structure alumina supporter

A technology of alumina carrier and double pores, which is applied in the direction of catalyst carrier, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of complex preparation process, etc., and achieve the effect of simple operation, easy mastery and high strength

Active Publication Date: 2014-06-25
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method does not involve carrier molding technology, in addition, the preparation process is complicated

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0021] Weigh 150 g of pseudo-boehmite dry rubber powder (produced by Shenyang Catalyst Factory, with an alumina dry basis content of 65%) and mix them with 2 g of scallop powder, add a small amount of aqueous solution containing 3 g of nitric acid and knead evenly, and then add An appropriate amount of mass concentration is an aqueous solution of 40% ammonium bicarbonate to make NH 4 + and Al 3+ The molar ratio is 0.5:1, knead the obtained material into a plastic body, extrude into a strip, put the formed wet material in a sealed tube furnace at a constant temperature of 70°C for 9 hours, and dry the material at 750°C for 2 hours. Alumina carrier B1 provided by the present invention.

example 2

[0023] With example 1, just adding an appropriate amount of mass concentration is the ammonium bicarbonate aqueous solution of 80%, makes NH 4 + and Al 3+ The molar ratio of the obtained material is 0.6:1, the obtained material is kneaded into a plastic body, extruded into a strip, and the formed wet material is placed in a sealed tube furnace at a constant temperature of 120°C for 5 hours to obtain the alumina carrier B2 provided by the invention. .

example 3

[0025] With example 1, just adding an appropriate amount of mass concentration is the aqueous solution of 50% ammonium bicarbonate, makes NH 4 + and Al 3+ The molar ratio of the obtained material is 0.7:1, the obtained material is kneaded into a plastic body, extruded into a rod, and the formed wet material is placed in a sealed tube furnace at a constant temperature of 100°C for 6 hours to obtain the alumina carrier B3 provided by the invention .

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PUM

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Abstract

The invention discloses a preparation method of a double-hole-structure alumina supporter. The preparation method comprises the steps of weighing a certain quantity of pseudo-boehmite dry glue powders, evenly mixing the pseudo-boehmite dry glue powder with a certain quantity of peptizing agent and extrusion-auxiliary agent, then adding a certain quantity of ammonium bicarbonate aqueous solution in materials, mixing and nipping obtained materials into a plasticizer, squeezing into stripes and molding, placing molded materials in a sealing container, and roasting to prepare the alumina supporter after hydro-thermal treatment. The temperature of the hydro-thermal treatment is 70-120 DEG C, and the treatment time is 5-10 hours. Roasting is carried out at the temperature of 600-750 DEG C for 2-4 hours. The mass concentration of an ammonium bicarbonate solution is 40%-80%, the adding quantity of the ammonium bicarbonate solution is calculated according to NH<4+> and Al<3+>, and a molar ratio of the NH<4+> to Al<3+> is (0.5-1):1. According to the preparation method, the preparation procedure is simple, the prepared alumina supporter is in double-hole distribution and has good mechanical strength, and the preparation method is suitable to the field of preparation of heavy oil and residual oil hydrodemetallization catalysts and the like.

Description

technical field [0001] The invention relates to a preparation method of an alumina carrier with a double hole structure. 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, and even Inactivation affects industrial applications. Catalysts with dual pore distribution ensure good diffusion properties of macromolecular reactants, and at the same time have high hydrodesulfurization and demetallization activities, and are often used in heavy oil processing. The pore structure of the catalyst is determined by the support constituting the catalyst. Therefore, the preparation of a support with dual pore distribution is the key to the preparation of this type of double pore hydrodemetallization catalyst. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J32/00B01J35/04
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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