Catalytic cracking catalyst and preparation method thereof

A cracking catalyst and catalytic cracking technology, applied in catalytic cracking, physical/chemical process catalysts, molecular sieve catalysts, etc., can solve the problems of complex preparation process and high cost, and achieve the effects of high pore volume, increased specific surface area, and improved conversion rate

Active Publication Date: 2012-07-18
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation of low-sodium silica sol by this method requires ion exchange, and the preparation process is complicated and the cost is high

Method used

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  • Catalytic cracking catalyst and preparation method thereof

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preparation example Construction

[0018] In the preparation method provided by the present invention, after the catalyst microspheres are mixed with inorganic ammonium salt and water in step (2) and step (4), keep in contact for a period of time, wash and exchange, and wash for the first time in step (2) Exchange, carry out the second washing exchange in step (4). Catalyst in step (2): inorganic ammonium salt: H 2 The weight ratio of O is preferably 1:(0.8-1.6):(8-25), the stirring time after mixing is preferably 30-80 minutes, and the exchange washing temperature is preferably 60-90°C, more preferably 70-90°C ; Catalyst in step (4): inorganic ammonium salt: H 2 The weight ratio of O is preferably 1:(0.8-1.6):(8-25), the stirring time after mixing is preferably 30-80 minutes, and the exchange washing temperature is preferably 60-90°C, more preferably 70-90°C . Said ammonium salt can be one or more of ammonium sulfate, ammonium chloride, ammonium nitrate, ammonium phosphate, ammonium hydrogen phosphate or am...

Embodiment 1

[0029] Under the room temperature of 22 ℃, get concentration 25% by weight sulfuric acid solution 3.5kg, with 7.2kg sodium water glass (catalyst Qilu branch production, containing SiO 2 Concentration 20%, modulus 3.2) mixed with 7.3kg decationized water for dilution, then slowly added the diluted sodium water glass into the above dilute sulfuric acid solution under stirring to obtain SiO 2 A silica sol with a concentration of 8% by weight and a pH value of 1.55.

[0030] Add 3.0 kg of kaolin (produced by China Kaolin Company, solid content 84% by weight) to 3.6 kg of decationized water, and beat to obtain a kaolin slurry. Mix the kaolin clay slurry with the silica sol slurry and stir evenly.

[0031] Add 2.0kg USY molecular sieve (produced by Catalyst Qilu Branch Company, solid content 84.9%) in 2.3kg decationized water, fully disperse with homogenizer, adjust pH value to 3.5 with dilute hydrochloric acid.

[0032] The molecular sieve slurry is added to the above silica sol-...

Embodiment 2

[0041] At room temperature of 34°C, 17.7kg of sodium water glass (produced by Sinopec Catalyst Qilu Branch, SiO 2 Content 8.47% by weight, modulus 3.2) adding concentration under stirring is the sulfuric acid solution 1.14kg of 25% by weight, obtains SiO 2 Silica sol with a concentration of 8% by weight and a pH value of 10.81.

[0042] 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.

[0043] Add 2.1 kg of USY molecular sieve (manufactured by Catalyst Qilu Branch, solid content 84.9%) into 2.5 kg of decationized water, and beat to obtain molecular sieve slurry.

[0044] The above-mentioned silica sol, kaolin slurry, and molecular sieve slurry are mixed and stirred to obtain a catalyst slurry with a pH value of 10.78, and then the slurry is spray-dried to obtain catalyst microspheres. The composition of the catalyst is 45% by weight kaolin, 30% by weight molecular sieve,...

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Abstract

The invention provides a catalytic cracking catalyst and a preparation method thereof. The preparation method of the catalyst comprises the steps of beating silica sol, zeolite and clay-containing matrix, spray-drying the obtained product, allowing the obtained product to be in contact with ammonium salt at a pH between 9 and 11 for first washing exchange and calcination and allowing the obtainedproduct to be in contact with the ammonium salt for second washing exchange. The method can increase the pore volume of the catalyst prepared. The catalyst is used for the catalytic cracking of hydrocarbon oil and can raise conversion rate, gasoline yield and the octane number of gasoline.

Description

technical field [0001] The invention relates to a hydrocarbon oil catalytic cracking catalyst and a preparation method thereof. Background technique [0002] In the process of catalytic cracking, in order to meet different needs and obtain maximum economic benefits, different catalysts are usually used for different raw materials. However, as crude oil becomes increasingly heavy and inferior, catalytic cracking requires more processing of heavy oil, Residual oil and imported oil with high heavy metal content put forward higher requirements on the anti-coking performance of the cracking catalyst. Due to the characteristics of high gasoline selectivity and low coke formation rate of silicon-rich matrix catalysts, the use of silicon-based cracking catalysts to process heavy oil has gradually attracted attention. [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 bin...

Claims

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Application Information

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Patent Type & Authority Patents(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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