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Preparation method for alumina carrier

A kind of technology of alumina carrier and preparation process, applied in the direction of catalyst carrier, chemical instrument and method, metal/metal oxide/metal hydroxide catalyst, etc., can solve the problem of high raw material cost and production cost, poor mechanical strength of carrier, preparation Problems such as complex process, to achieve the effect of small amount of pore expander, good mechanical strength and simple process

Active Publication Date: 2012-01-11
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The amount of carbon black powder that this method needs is more, is preferably greater than 20% of active alumina or its precursor weight, the carrier that this method prepares also has the large amount of pore-enlarging agent, and carrier mechanical strength is poor, and pore distribution is diffuse, not good. Disadvantages such as concentration
[0006] CN1256969A proposes to use two kinds of alumina in different forms, and use two kinds of pore-enlarging agents, physical pore-enlarging agent and chemical pore-enlarging agent, to obtain an alumina carrier with suitable performance, but the preparation process is complicated, and the raw material cost and production cost are relatively high

Method used

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  • Preparation method for alumina carrier
  • Preparation method for alumina carrier
  • Preparation method for alumina carrier

Examples

Experimental program
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Effect test

example 1

[0028] Take by weighing pseudo-boehmite dry rubber powder (produced by Shenyang Catalyst Factory, alumina dry basis content 65%) 100g is placed in autoclave, add 100ml deionized water, autoclave is sealed and is placed in baking oven and heats, and control heating rate is 10℃·min -1 After the temperature rose to 180°C, the temperature was maintained for 3 hours, and then naturally cooled to room temperature. After filtration, the filter cake was dried at 120°C for 1 hour. Pseudo-boehmite after drying and 1.5g concentration are the nitric acid of 65% by weight, 7g carbon black powder, 2g field turnip powder and 75g deionized water mix evenly, extrude into the clover-shaped bar of diameter 1.8mm on the screw extruder , dried at 120° C. for 3 hours, and baked the dried molded product at 700° C. for 3 hours to obtain the alumina carrier B1 provided by the present invention.

example 2

[0030] Same as Example 1, except that the temperature was raised to 110° C. and kept at the temperature for 4 hours, and the amount of deionized water added was 20 ml to obtain the carrier B2 provided by the present invention.

example 3

[0032] Same as Example 1, except that the temperature was raised to 300° C. and kept at the temperature for 2 hours, and the amount of deionized water added was 150 ml to obtain the carrier B3 provided by the present invention.

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Abstract

The invention discloses a preparation method for an alumina carrier. The preparation method comprises the following steps of: (1) performing pressing hydrothermal treatment on pseudo-boehmite dry colloid powder; (2) kneading the pseudo-boehmite dry colloid powder obtained in the step (1) into plastic; and (3) performing forming on the plastic obtained in the step (2), drying and roasting the formed substance, and thus obtaining the final alumina carrier. The alumina (Al2O3) carrier with large aperture, centralized pore distribution and good strength is prepared by the method; and meanwhile, the method is simple in process, low in reaming agent consumption and low in raw material cost. The prepared alumina carrier can be applied in the fields of petroleum processing, chemical industry, environment friendliness and the like, and is particularly suitable for preparing heavy oil and residuum hydro-treating catalysts.

Description

technical field [0001] The invention relates to a preparation method of alumina carrier. Background technique [0002] At present, in the production process of hydrodemetallization of heavy oil and residual oil, because the raw oil contains a certain amount of impurities such as vanadium, sulfur, arsenic, nickel, etc., deposits are easily formed, thereby blocking the pores of the catalyst, resulting in a rapid decline in catalyst activity. , resulting in inactivation and affecting industrial applications. The physical properties of the catalyst support, such as the programmable pore size, pore size distribution, mechanical strength, specific surface area, pore volume, etc., are important factors affecting the activity and stability of the hydrodemetallization catalyst. Alumina is a commonly used catalyst carrier, widely used in petroleum processing, chemical industry, environmental protection and other fields. The alumina and commercially available alumina usually used to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J32/00B01J21/04B01J23/883C10G45/08
Inventor 季洪海沈智奇凌凤香王丽君杨卫亚王丽华郭常友
Owner CHINA PETROLEUM & CHEM CORP
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