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Preparation method of modified aluminium oxide-based carrier

An alumina-based, alumina-based technology, applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., can solve the problem of catalyst acidity and weak comprehensive adjustment of active phase, reduced utilization of additives, and impact on Catalyst comprehensive performance and other issues, to achieve the effect of reasonable acidity and acidity distribution, and improve performance

Active Publication Date: 2016-06-29
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The above-mentioned prior art uses co-precipitation method or adding additives during molding. The former will cause active metals and Si and other additives to enter the bulk phase during the co-precipitation process, and multiple substances are precipitated at the same time. The same precipitation conditions cannot be simultaneously The best precipitation conditions for a variety of substances, and the additives have no selectivity to the formation of the active metal active phase and the adjustment of the acidity of the catalyst, thus affecting the overall performance of the final catalyst; while the latter adds Si and other additives during kneading molding, It is not conducive to the uniform dispersion of additives, not only the utilization rate of additives is reduced, but also the comprehensive adjustment effect on the acidity and activity of the catalyst is weak, which is not conducive to the improvement of the comprehensive performance of the catalyst

Method used

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preparation example Construction

[0020] According to the preparation method of the modified alumina-based carrier provided by the present invention, it can specifically adopt the following steps:

[0021] 1. Prepare the soluble aluminum-containing compound into solution A, wherein the concentration of the aluminum-containing compound is 0.1g / 100mL~32g / 100mL in terms of alumina;

[0022] 2. Prepare water-soluble silicone oil into solution B, wherein the concentration of water-soluble silicone oil is 0.1g / 100mL~20g / 100mL in terms of silicon oxide;

[0023] 3. Mix soluble aluminum-containing compound and water-soluble silicone oil to prepare solution C, wherein the concentration of aluminum-containing compound is 0.1g / 100mL~16g / 100mL in terms of alumina, and the concentration of water-soluble silicone oil is 0.1g / 100mL~ in terms of silicon oxide 10g / 100mL;

[0024] 4. Use at least one of the following methods to introduce water-soluble silicone oil and aluminum-containing compounds onto the alumina-based carrie...

Embodiment 1

[0044] Take 3800g of macroporous aluminum hydroxide dry rubber powder, 200g of SB powder, add 160g of citric acid and 160g of safflower powder, and mix well. Then uniformly add 2900 g of dilute nitric acid aqueous solution, wherein the concentration of nitric acid is 2.9 wt%. The material was kneaded for 15 minutes, then rolled for 20 minutes, and extruded with a clover orifice plate with a diameter of 1.7 mm. Dry at 120°C for 4h and then bake at 500°C for 4h. The calcined carrier is marked as Z.

[0045] The physical and chemical properties of alumina carrier Z are shown in Table 2:

[0046] Table 2 Physicochemical properties of alumina carrier Z

[0047]

Embodiment 2

[0049] Weigh 34.5 g of aluminum nitrate, add an appropriate amount of deionized water to dissolve, and make the volume 105 mL to prepare solution A1. Weigh 16.5 g of water-soluble silicone oil A, add an appropriate amount of deionized water to dissolve, and make the volume 105 mL, and prepare solution B1. While stirring, slowly pour 35mL of B1 solution into 35mL of A1 solution, and add an appropriate amount of deionized water to make the final volume 78mL to prepare C1 solution.

[0050] Take 100g of alumina carrier Z, spray the solution C1 evenly on the alumina carrier, after curing for 10 hours, heat-treat at 100°C for 2h, then heat-treat at 220°C for 2h to obtain the modified carrier S1.

[0051] Take 100g of alumina carrier Z, dilute 35mL solution B1 to 78mL with deionized water, spray evenly on the carrier Z, keep in good condition for 10 hours, heat-treat at 100°C for 2 hours, then dilute 35mL solution B1 to 76mL with deionized water, and evenly Spray on the carrier, af...

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Abstract

The invention discloses a preparation method of a modified aluminium oxide-based carrier. The preparation method comprises following steps: water soluble silicone oil and a soluble aluminum-containing compound are introduced into an aluminium oxide-based carrier successively or simultaneously, and the modified aluminium oxide-based carrier is obtained via heat treatment. The preparation method is capable of adjusting distribution of acid centers and hydrogenation active centers, achieving coordination effects, and improving catalyst performance; and the modified aluminium oxide-based carrier is suitable to be taken as a hydrogenation catalyst carrier.

Description

technical field [0001] The invention relates to a preparation method of a modified alumina-based carrier, especially a silicon- and aluminum-modified alumina-based carrier, which is suitable as a carrier for a hydrogenation catalyst. Background technique [0002] Most supported catalysts are prepared by impregnation method, such as various hydrogenation catalysts. Alumina is often used as a carrier material for this type of catalyst. but pure Al 2 o 3 The interaction force between the active metal on the surface and the carrier is relatively large, and it is easy to form inactive species (such as the formation of nickel-aluminum spinel), and it is difficult to completely vulcanize to form a type II active phase with high hydrogenation activity. At the same time, the acidity of the catalyst surface has a great influence on the activity of the hydrogenation catalyst. The removal of heteroatoms in the raw material requires the catalyst to have hydrogenolysis activity, which ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/12B01J27/19C10G45/08
Inventor 杨占林方向晨唐兆吉姜虹温德荣王继锋王平孙立刚
Owner CHINA PETROLEUM & CHEM CORP
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