Catalytic cracking catalyst and preparation method thereof

A catalytic cracking and catalyst technology, used in catalytic cracking, physical/chemical process catalysts, molecular sieve catalysts, etc., can solve the problems of low pore volume of silicon-based cracking catalysts, improve cracking activity, reduce pollution, and achieve good coke selectivity Effect

Active Publication Date: 2010-06-16
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0010] The technical problem to be solved by the present invention is to provide a new silicon-rich cracking catalyst and its preparation method in view of the low pore volume of existing silicon-based cracking catalysts prepared with acidic silica sol binders

Method used

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  • Catalytic cracking catalyst and preparation method thereof

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preparation example Construction

[0021] In the preparation method provided by the present invention, the alkali silica sol obtained by contacting the water glass with an acid can exist stably at a higher temperature, and has better stability in the temperature range of 0-60°C, thus The contacting can be performed at room temperature. Preferably, the temperature of the silica sol obtained by contacting water glass with acid is 0-45°C.

[0022] In the preparation method provided by the invention, described in the step (1), the water glass is contacted with the inorganic acid, which can be a batch mode or a continuous mode. During batch mode production, acid is preferably added to the water glass solution.

[0023] In the method provided by the invention, the consumption of water glass in step (1) should make the content of silicon binding agent in the prepared catalyzer meet the requirements, take the weight of the prepared catalyzer as a basis, take SiO 2 The content of the silicon binder in the prepared cat...

Embodiment 1

[0032] Under the room temperature of 34 ℃, 7.5kg sodium water glass (produced by Sinopec Catalyst Qilu Branch, SiO 2 Content 20% by weight, modulus 3.2) mixes with 10.2kg decationized water, then under stirring, adding therein concentration is 1.14kg of sulfuric acid solution of 25% by weight, obtains SiO 2 Silica sol with a concentration of 8% by weight and a pH value of 10.81. A little flocculation occurred in the silica sol after standing for 24 hours, but no gel was formed.

[0033] Add 3.2 kg of kaolin (produced by China Kaolin Company, solid content: 84% by weight) to 3.8 kg of decationized water, and beat to obtain a kaolin slurry.

[0034] Add 2.1 kg of USY molecular sieve (produced by Catalyst Qilu Branch Company, solid content 84.9%) into 2.5 kg of decationized water, and beat to obtain molecular sieve slurry.

[0035] The above-mentioned silica sol, kaolin slurry, and molecular sieve slurry are mixed and stirred to obtain a sol-state catalyst slurry with a pH valu...

Embodiment 2

[0049] Under 38 ℃, 7.8kg sodium silicate (produced by Catalyst Qilu Branch, containing SiO 2 Concentration 15%, modulus 2.8) mixes with 10.0kg decationized water, then adds 1.71kg of 15% by weight sulfuric acid thereto under stirring, obtains SiO 2 Silica sol with a concentration of 6% by weight and a pH value of 10.3.

[0050] 4.2 kg of montmorillonite (manufactured by Nanhua Hongshan Bentonite Co., Ltd., with a solid content of 78.6% by weight) was added to 4.1 kg of decationized water, and beaten to obtain a montmorillonite slurry.

[0051] Add 1.63 kg of DASY molecular sieve (manufactured by Catalyst Qilu Branch Company, solid content 91.8%) into 2.65 kg of decationized water, and beat to obtain molecular sieve slurry.

[0052] Mix the above-mentioned silica sol, montmorillonite slurry, and molecular sieve slurry, and stir to obtain a sol-state catalyst slurry with a pH value of 10.2. Spray-dry the slurry to obtain microspherical catalyst particles, and then spray the cat...

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Abstract

The invention relates to a catalytic cracking catalyst and a preparation method thereof. The preparation method of the catalyst comprises the following steps of: leading soluble glass and acid to contact to prepare alkaline silicasol with the pH value of 10-11.5 and the SiO2 content of 3-20wt%, mixing the alkaline silicasol and active components, pulping and drying. The pore volume of the cracking catalyst prepared by the preparation method of the catalyst in the invention is higher. The catalyst of the invention has higher capability of heavy oil cracking for catalyzing and cracking the heavy oil.

Description

technical field [0001] The invention relates to a hydrocarbon oil catalytic cracking catalyst and a preparation method thereof. Background technique [0002] In recent years, catalytic cracking raw materials have become increasingly heavy and inferior, which leads to high coke formation rate and low light oil yield in catalytic cracking. For this reason, cracking catalysts with high light oil yield and low coke formation rate are required. In general, silicon-rich cracking catalysts have better coke selectivity than aluminum-based catalysts. At present, silica sol binder is commonly used in the preparation of silicon-rich cracking catalysts. [0003] U.S. Patent No. 3867308 discloses a method for preparing acidic silica sol by reacting sodium silicate with inorganic acid, and then using silica sol as a binder to prepare a catalytic cracking catalyst. However, the prepared catalyst has a large bulk density, which is not conducive to fluidization, and the pore volume Small, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/08C10G11/05
Inventor 杨丽静田辉平龙军严加松
Owner CHINA PETROLEUM & CHEM CORP
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