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Preparation method of catalytic cracking catalyst

A catalytic cracking and catalyst technology, used in catalytic cracking, physical/chemical process catalysts, molecular sieve catalysts, etc., can solve the problems of difficulty in recycling, complex composition, and high water content, and achieve recycling, product quality stability, and dosage reduction. Effect

Active Publication Date: 2013-04-24
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the complex composition, low whiteness and high moisture content of these catalyst filter residues, it is difficult to recycle them, and the discharge of these catalyst filter residues into the environment will cause serious environmental pollution

Method used

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  • Preparation method of catalytic cracking catalyst
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preparation example Construction

[0013] The preparation method of described catalytic cracking catalyst according to the present invention comprises the following steps:

[0014] (1) The catalyst filter residue, NaY molecular sieve gel, kaolin and binder are mixed and slurried, and the resulting slurry is spray-dried to obtain microspheres, wherein, relative to 100 parts by weight of the microspheres, the catalyst The amount of the filter residue on a dry basis is 10-60 parts by weight, the amount of the NaY molecular sieve gel on a dry basis is 5-20 parts by weight, and the amount of kaolin on a dry basis is 20-70 parts by weight;

[0015] (2) Carrying out gas-phase crystallization of the microspheres obtained in step (1), and then roasting;

[0016] (3) The product obtained after roasting is mixed with directing agent, sodium silicate and sodium hydroxide, and subjected to hydrothermal crystallization, and then the product obtained after hydrothermal crystallization is filtered, washed and dried to obtain N...

Embodiment 1

[0040] This example is used to illustrate the preparation method of the catalytic cracking catalyst of the present invention.

[0041] (1) Preparation of NaY molecular sieve

[0042] 2.8kg (dry basis) kaolin, 0.48kg NaY molecular sieve gel (in dry basis, SiO 2 :Al 2 o 3 :Na 2 The molar ratio of O is 8.4:1:2.6) and 0.4kg catalyst filter residue (on a dry basis, SiO 2 :Al 2 o 3 :Na 2 O:Fe 2 o 3 : Re 2 o 3 :Cl - : SO 4 2- The weight ratio is 62.5: 21.56: 5.8: 0.24: 1.26: 1.27: 6.24) mixed, and water and 1.3kg water glass (containing 20.03% by weight of SiO 2 , 6.39 wt% Na 2 (2, the balance being water), making a slurry with a solid content of 32% by weight, which was then spray-dried to obtain 4kg of spray microspheres A1.

[0043] The sprayed microspheres A1 were vapor-phase crystallized in a saturated water vapor atmosphere at 98°C for 24 hours, and then calcined in a muffle furnace at 600°C for 2 hours to obtain calcined microspheres B1.

[0044] Under stirrin...

Embodiment 2

[0052] This example is used to illustrate the preparation method of the catalytic cracking catalyst of the present invention.

[0053] (1) Preparation of NaY molecular sieve

[0054] 2.4kg (dry basis) kaolin, 0.48kg NaY molecular sieve gel (in dry basis, SiO 2 :Al 2 o 3 :Na 2 The molar ratio of O is 8.4:1:2.6) and 0.8kg catalyst filter residue (on a dry basis, SiO 2 :Al 2 o 3 :Na 2 O:Fe 2 o 3 : Re 2 o 3 :Cl - : SO 4 2- The weight ratio is 62.5: 21.56: 5.8: 0.24: 1.26: 1.27: 6.24) mixed, and water and 1.3kg water glass (containing 20.03% by weight of SiO 2 , 6.39 wt% Na 2 (2, the balance being water), making a slurry with a solid content of 32% by weight, which was then spray-dried to obtain 4kg of spray microspheres A2.

[0055] The sprayed microspheres A2 were vapor-phase crystallized in a saturated water vapor atmosphere at 100°C for 24 hours, and then calcined in a muffle furnace at 600°C for 2 hours to obtain calcined microspheres B2.

[0056] Under stirri...

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Abstract

The invention relates to a preparation method of a catalytic cracking catalyst. The preparation method comprises the following steps of: (1) mixing catalyst filter residues, NaY molecular sieve gel, kaolin and binders to prepare pulp, and spray-drying the obtained pulp to obtain a microsphere; (2) carrying out gas-phase crystallization on the microsphere obtained in the step (1), and then roasting the product; (3) mixing the product obtained after roasting with a guiding agent, sodium silicate and sodium hydroxide, carrying out hydrothermal crystallization, and then filtering, washing and drying the product obtained after hydrothermal crystallization to obtain an NaY molecular sieve; and (4) carrying out ion exchange and roasting on the NaY molecular sieve obtained in the step (3). According to the method, recycling of the catalyst filter residues can be achieved and the dosage of kaolin can be reduced, thus the production cost is lowered, and the obtained catalytic cracking catalyst shows higher catalytic cracking activity in the catalytic cracking reaction of heavy oil.

Description

technical field [0001] The invention relates to a preparation method of catalytic cracking catalyst. Background technique [0002] In the field of catalytic cracking catalysts, NaY molecular sieves are the main source of active components. The usual method for preparing NaY molecular sieves is to use an alkaline silica-alumina gel system to synthesize, and the synthesized molecular sieves have the characteristics of high molecular sieve content and high silica-alumina ratio. [0003] In the 1970s, the Engelhard Company of the United States developed a new method for the synthesis of NaY molecular sieves - kaolin in-situ crystallization method, that is, using kaolin as a raw material to simultaneously prepare active components and matrix in-situ crystallization of zeolite. The FCC catalyst obtained by in-situ crystallization is called kaolin-type catalyst, also known as all-clay catalyst. Compared with the FCC catalyst prepared by the semi-synthetic process with the Y-type ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/08C10G11/05
Inventor 于向真贺勇陈伟君
Owner CHINA PETROLEUM & CHEM CORP
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