Preparation method and application of catalyst

A technology for catalysts and hydrogenation catalysts, applied in catalyst activation/preparation, molecular sieve catalysts, chemical instruments and methods, etc., can solve problems such as time-consuming, difficult to analyze results, cumbersome and complicated operation steps, etc., achieve fast speed and low wear index , the effect of simple operation

Pending Publication Date: 2022-05-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, centrifugal separation, drying, high-temperature roasting, and weighing calculation are required in the analysis process. The operation steps are cumbersome and time-consuming, and it is difficult to quickly obtain the analysis results, resulting in a decrease in catalyst production efficiency.

Method used

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  • Preparation method and application of catalyst

Examples

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preparation example Construction

[0024] A first aspect of the present invention provides a method for preparing a catalyst, the method comprising the following steps:

[0025] 1) the step of preparing an alumina suspension with the pseudo-boehmite sample to be tested and water;

[0026] 2) the step of mixing the aluminum oxide suspension obtained in step 1) with an acid to obtain a glue solution;

[0027] 3) the step of measuring the particle size of the mixed solution obtained in step 2);

[0028] Wherein, when step 3) measures particle size Dv 90 When ≤15 μm, peptization of pseudo-boehmite is used to prepare the catalyst.

[0029] The inventors of the present invention have found through a large number of studies that there is a corresponding relationship between the peptization performance of pseudo-boehmite and the particle size, when Dv 90 When the diameter is less than or equal to 15 μm, the pseudo-boehmite has good peptization performance and is suitable for preparing catalysts. According to the pr...

Embodiment 1

[0045] (1) Take 16.21g of pseudo-boehmite and add 83.5g of deionized water, and mix to obtain alumina suspension.

[0046] (2) Add 3.00 g of 20% by mass hydrochloric acid to the alumina suspension to make the acidic H + The molar ratio to the aluminum oxide suspension in terms of Al element was 0.09:1, and the mixture was stirred at a stirring speed of 500 rpm for 15 minutes to obtain a glue solution.

[0047] (3) Get 5mL of glue solution from the glue solution that keeps stirring at 500rpm, add dropwise in the sample container of laser particle size analyzer (manufactured by Malvern, model is MS3000), record particle diameter Dv 90 = 9.23 μm.

[0048] (4) Catalyst preparation: pseudo-boehmite: kaolin: molecular sieve: aluminum sol is mixed in a mass ratio of 20:40:30:10, and then water is added so that the solid content in the mixed solution is 35% by mass, mixed evenly, and then hydrochloric acid is added (the mass ratio of hydrochloric acid and pseudo-boehmite is 0.08) ar...

Embodiment 2-5

[0050] Prepare the catalyst according to the method of Example 1, the difference is that the H in the acid is added + With the molar ratio of said alumina suspension in terms of Al element and the Dv of pseudo-boehmite colloidal solution 90 for the values ​​shown in Table 1

[0051] Table 1

[0052] Example number h + Molar ratio with Al

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Abstract

The invention relates to the field of catalysts, and discloses a preparation method and application of a catalyst, and the method comprises the following steps: 1) preparing an alumina suspension from a pseudo-boehmite sample to be detected and water; (2) mixing the aluminum oxide suspension obtained in the step (1) with acid to obtain a glue solution; (3) measuring the granularity of the mixed solution obtained in the step (2); wherein when the particle size Dv90 measured in the step (3) is less than or equal to 15 microns, the pseudo-boehmite is peptized for preparing the catalyst. The method has the advantages of simplicity in operation and high speed, and the catalyst prepared by the method is low in wear index.

Description

technical field [0001] The invention relates to the field of catalysts, in particular to a catalyst preparation method and application thereof. Background technique [0002] Pseudo-boehmite, also known as pseudo-boehmite, is the first crystal phase formed in the synthesis of aluminum hydroxide, but the crystallization is incomplete. It can be acidified and peptized with nitric acid, hydrochloric acid, trichloroacetic acid, etc., and is widely used in the field of catalysis as a binder. The diaspore is used to prepare a catalytic cracking catalyst, and can simultaneously play the roles of an active matrix and a binder. When pseudo-boehmite is used as a raw material for catalyst production, it needs to be peptized with acid and then subjected to subsequent treatment. Its peptization performance has an important impact on the activity, pore structure and wear index of the catalyst. In particular, the attrition index of the prepared catalyst mainly depends on the peptization c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J35/10B01J21/04B01J35/02B01J37/03B01J29/00
CPCB01J35/1019B01J35/1038B01J21/04B01J35/023B01J37/036B01J37/038B01J37/0072B01J29/00
Inventor 胡海强杨柳任靖祝平赵保槐李柯志尹岑李腾飞
Owner CHINA PETROLEUM & CHEM CORP
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