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Catalytic cracking catalyst as well as preparation method and application thereof

A catalytic cracking and catalyst technology, used in catalyst activation/preparation, catalytic cracking, physical/chemical process catalysts, etc., can solve the problems of increased coke content, hydrogen and dry gas by-products of catalytic cracking

Inactive Publication Date: 2021-08-31
潍坊正轩稀土催化材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, when the current in-situ crystallization catalyst treats heavy oil containing heavy metal pollutants, the amount of coke, hydrogen and dry gas by-products of catalytic cracking increases significantly.

Method used

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  • Catalytic cracking catalyst as well as preparation method and application thereof
  • Catalytic cracking catalyst as well as preparation method and application thereof
  • Catalytic cracking catalyst as well as preparation method and application thereof

Examples

Experimental program
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preparation example Construction

[0034] The invention provides a kind of preparation method of catalytic cracking catalyst, comprises the following steps:

[0035] Alkaline extraction is carried out by mixing calcined kaolin, the first strong base and water to obtain an extraction matrix and an extraction mother liquor, and the calcined kaolin includes γ-Al 2 o 3 , the extraction matrix includes γ-Al 2 o 3 and silicon-aluminum composite oxides;

[0036] Part of the extraction matrix, binder (with SiO 2 meter), kaolin and water are mixed to obtain a mixed slurry;

[0037] The mixed slurry is dried to obtain a solid product;

[0038] Carrying out the first calcination of the solid product to obtain the partial earth precursor, the temperature of the first calcination is 800-850°C;

[0039] Carrying out the second calcination of the solid product to obtain the high soil precursor, the temperature of the second calcination is 900-1000°C;

[0040] Mixing the partial earth precursor, high earth precursor, si...

Embodiment 1

[0117] Get 500g metahydrokaolin (85% of dry basis mass percentage composition of kaolinite, Al 2 o 3 40% by mass on a dry basis, SiO 2 The mass percentage of dry basis is 52%, Na 2 O and K 2 The dry basis mass percentage of the total mass of O is 0.6%, the dry basis mass percentage of the total mass of CaO and MgO is 0.8%; the specific surface area is preferably 7 ~ 10m 2 / g, the average particle size is preferably 1-4 μm) pre-calcined at 1050 ° C for 6 hours to obtain calcined kaolin;

[0118] Adopt BET specific surface area test method to test the specific surface of described calcined kaolin, the isothermal adsorption curve figure of described calcined kaolin is as follows image 3 shown by image 3 Draw the specific surface of described calcined kaolin to be 7~10m 2 / g;

[0119] Take 300 g of calcined kaolin and transfer it into a beaker, add 360 g of sodium hydroxide solution (32% by mass of NaOH), add 150 g of water and stir and mix for 35 min. Stir to form a slu...

Embodiment 2

[0139] The preparation method is basically the same as in Example 1, except that: the pre-calcination temperature is 1150°C to obtain Matrix-2; XRD shows figure 2 Shown: the present invention has prepared SiO by alkali extraction 2 -Al 2 o 3 of composite oxides. A catalytic cracking catalyst was obtained from matrix 2 by the same preparation method as in Example 1, which was designated as C-2.

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Abstract

The invention belongs to the technical field of supported molecular sieve catalysts, and particularly relates to a catalytic cracking catalyst and a preparation method and application thereof. The preparation method provided by the invention comprises the following steps: carrying out alkali extraction on calcined kaolin to obtain an extraction matrix; mixing the extraction matrix with kaolin, adding a binder and water to obtain a mixed slurry, drying the mixed slurry, performing first calcination and second calcination, controlling the temperatures of the first calcination and the second calcination to obtain a partial soil precursor and a high soil precursor with different silica-alumina ratios, adding a silicon source, a second strong base, a guiding agent and water, and performing hydrothermal crystallization reaction; after the Y-type molecular sieve is generated in the pore channels of the partial soil precursor and the high soil precursor through in-situ crystallization, performing ion exchange so that cations in the Y-type molecular sieve are exchanged into rare earth ions, wherein the obtained catalytic cracking catalyst still has high catalytic activity under the condition of high heavy metal content in heavy oil.

Description

technical field [0001] The invention belongs to the technical field of supported molecular sieve catalysts, in particular to a catalytic cracking catalyst and its preparation method and application. Background technique [0002] Heavy oil catalytic cracking is an important means to improve the processing depth of crude oil and increase the yield of light oil. Catalytic cracking is to rely on the action of a catalyst to crack heavy oil into light oil products through a series of chemical reactions at a certain temperature (460-530°C). [0003] Since catalytic cracking catalysts are generally solid, when heavy oil reacts with the catalyst, heavy metal pollutants (such as nickel and vanadium) in the heavy oil will deposit on the catalyst, causing the catalyst to lose its activity and selectivity. Moreover, after heavy metal pollutants are deposited on the surface of the catalyst, a large amount of by-products such as coke, hydrogen and dry gas will be catalyzed, and the genera...

Claims

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Application Information

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IPC IPC(8): B01J29/08B01J37/30B01J37/10B01J35/10C01B39/24C10G11/05
CPCB01J29/088B01J37/30B01J37/10C01B39/24C10G11/05B01J2229/186C10G2400/02C10G2400/28C10G2300/70B01J35/615
Inventor 邵明迪段成林刘玉玲阮征陈璠
Owner 潍坊正轩稀土催化材料有限公司