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A kind of preparation method of alumina carrier

A technology of alumina carrier and acidic aluminum, which is applied in the direction of catalyst carrier, preparation of alkali metal aluminate/alumina/aluminum hydroxide, chemical instruments and methods, etc. Insufficient aluminum carrier, particles and other problems, to achieve the effect of narrow particle size distribution, high crystal purity, and simplified preparation steps

Active Publication Date: 2016-11-02
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the alumina dry gel prepared by this method has a large particle size, its crystallinity is low and the particles are not complete enough. In the process of preparing the carrier, it is easy to cause particle damage and channel collapse. It is difficult to prepare a large-pore alumina carrier.
[0005] It can be seen that the alumina carrier prepared by the prior art has a wide pore size distribution, low crystallinity, and incomplete particles, so it is difficult to prepare an alumina carrier with a narrow particle size distribution, large pore size, and high crystallinity.

Method used

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  • A kind of preparation method of alumina carrier
  • A kind of preparation method of alumina carrier
  • A kind of preparation method of alumina carrier

Examples

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preparation example Construction

[0040] The preparation method of alumina carrier of the present invention specifically comprises the following steps:

[0041] (a) Prepare the working solution, the concentration and preparation method of the working solution are well known to those skilled in the art. For example, the concentration of an acidic aluminum salt solution is Al 2 o 3 It is calculated as 3g / 100mL~15g / 100mL; the concentration of alkali metal aluminate aqueous solution is expressed as Al 2 o 3 It is calculated as 8g / 100mL~35g / 100mL, or dilute ammonia solution can be prepared, the concentration is NH 3 Calculated as 9 g / 100mL ~ 20g / 100mL. Acidic aluminum salt solution is generally AlCl 3 、Al 2 (SO 4 ) 3 or Al(NO) 3 Aqueous solution, preferably Al 2 (SO 4 ) 3 Aqueous solution; The alkali metal aluminate aqueous solution is selected from NaAlO 2 or KAlO 2 aqueous solution. Alkaline precipitants are generally NaOH, (NH 4 ) 2 CO 3 or NH 4 OH solution, preferably (NH 4 ) 2 CO 3 or NH ...

Embodiment 1

[0054] This example introduces the preparation method of Mo, Ni, P original solution. In this example, only one original solution of Mo, Ni, and P with one concentration and ratio is prepared, and solutions with other ratios and concentrations can be prepared according to the method introduced.

[0055] Take 386g of molybdenum oxide and 123g of basic nickel carbonate into a multi-necked flask, add a certain amount of deionized water, stir until the substance in the bottle is slurry, then slowly add 86g of phosphoric acid, and then heat slowly after the initial reaction , keep the solution temperature at 90° C. to 110° C. for 1 h to 3 h. After stopping the heating, filter the obtained solution while it is hot, and after filtering out some insoluble impurities, a clear dark green original solution is obtained. The solution composition is MoO 3 : 69.27g / 100ml; NiO: 12.49g / 100ml; P: 4.10g / 100ml.

Embodiment 2

[0057] 6L sodium metaaluminate aqueous solution (Al 2 o 3 The concentration is 20g / 100mL) and 9L aluminum sulfate aqueous solution (Al 2 o 3 Concentration of 5g / 100mL) into containers with pumps, respectively connected to the feed port Ⅰ and feed port Ⅱ of the impingement flow reactor equipped with 5L distilled water, and heat the impingement flow reactor to 65°C ;Start the propeller agitator in the impinging flow reactor, adjust the included angle of the two draft tubes to 0°, adjust the rotating speed to 1500r / min, and after a period of stability, adjust the flow rate of the feed inlet I and the feed inlet II to 0.6L / min, start to inject sodium metaaluminate aqueous solution and aluminum sulfate aqueous solution, adjust the pH value to 7.0; after 15 minutes of neutralization, stop feeding, and after 10 minutes of stabilization; add sodium metaaluminate aqueous solution, adjust the pH value to 9.0, stop Feeding; after 10 minutes of stabilization, add aluminum sulfate aqueo...

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Abstract

The invention discloses a preparation method of an alumina carrier. The method of the present invention comprises: using an impingement flow reactor, the cocurrent neutralization of the acidic aluminum salt solution and the alkali metal aluminate solution is combined with the pH value swing neutralization process to carry out the gelation process, and the neutralized material is aged, filtered and washed and drying to obtain alumina dry glue, which is extruded, dried and calcined to obtain alumina carrier. The alumina carrier prepared by the method of the invention has relatively large pore size, concentrated pore size distribution, high crystallinity and complete crystal grains. It can be used to prepare wax oil and residual oil hydrotreating catalyst.

Description

technical field [0001] The invention relates to a preparation method of alumina carrier. Background technique [0002] As we all know, the current preparation methods of alumina dry glue can be classified into solid-phase method, gas-phase method and liquid-phase method. Liquid phase methods include precipitation method, sol-gel method and phase transfer method. The alumina dry rubber prepared by the conventional precipitation method has large grains, but the crystallinity is low, the particle integrity is not high, the pore distribution is relatively diffuse, and the pore structure is not ideal; Under the action of dissolved acid and shear force, it is easy to cause the collapse of the pores, the pore volume and pore diameter are small, resulting in low strength and reduced bulk density, and it is difficult to prepare a carrier with large pore volume, high specific surface area, and high strength. [0003] The impingement flow reactor is installed in the lower part of the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J32/00B01J21/04B01J35/10C01F7/02C01F7/04C10G45/04
Inventor 吕振辉薛冬彭绍忠张学辉
Owner CHINA PETROLEUM & CHEM CORP
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