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Preparation method of in-situ crystallization type catalytic cracking catalyst

A catalytic cracking and in-situ crystallization technology, applied in catalytic cracking, physical/chemical process catalysts, molecular sieve catalysts, etc., can solve problems such as a large increase in white powder content

Active Publication Date: 2019-12-03
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the patent does not mention the production amount of the by-product non-situ crystallization product (white powder) in the in-situ crystallization product
However, according to the principle of in-situ crystallization, the serious impact caused by the addition of aluminum source is the non-in-situ crystallization product, and the content of white powder is greatly increased, which will have a great impact on the operation in subsequent industrial production and the discharge and treatment of production sewage.

Method used

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  • Preparation method of in-situ crystallization type catalytic cracking catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] 10 kg of kaolin and water are prepared into a slurry with a solid content of 35%, and 500 g of sodium silicate is added as a dispersant, and spray molding is performed. The resulting sprayed soil ball was calcined at 940°C for 2h. After roasting, 1kg of the calcined soil ball was stirred with a 10% sodium hydroxide solution with a mass concentration of 1050mL and heated to 85°C for 120min, then 200g of directing agent was added, heated to 93°C, static crystallization for 25h, filtered, washed, and dried.

Embodiment 2

[0040] 10 kg of kaolin and water are prepared into a slurry with a solid content of 27%, and 1000 g of aluminum sol is added as a dispersant, and sprayed. The sprayed soil balls are calcined at 920°C for 6 hours to obtain high soil balls, and at 600°C for 6 hours to obtain partial soil balls. After roasting 800g of high soil ball and 200g of partial soil ball and 950mL with a mass concentration of 18% sodium hydroxide solution, stir, and heat up to 70℃ for 180min, then add 220g of directing agent, heat up to 96℃, stir and crystallize for 24h, Filter, wash and dry.

Embodiment 3

[0042] 10 kg of kaolin and water are prepared into a slurry with a solid content of 40%, and 500 g of aluminum sol is added as a dispersant, and sprayed. The sprayed soil balls are calcined at 1030°C for 1.5 hours to obtain high soil balls, and at 850°C for 1.5 hours to obtain partial soil balls. The calcined high soil balls 650g and 350g partial soil balls are stirred with 750mL of a 20% sodium hydroxide solution with a mass concentration and heated to 100°C for 45min, then 180g of directing agent is added, heated to 85°C, stirred and crystallized for 36h. Filter, wash and dry.

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Abstract

The invention provides a preparation method of an in-situ crystallization type catalytic cracking catalyst. The preparation method specially comprises the steps that by adjusting an in-situ crystallization technology, that is, roasted soil balls and a sodium hydroxide solution used for crystallization are mixed firstly, then a guiding agent is directly added for crystallization, any additional silicon source does not need to be added, and thus an in-situ crystallization product with the high crystallization degree, large pore volume and low heap ratio is obtained. Through the preparation method, a conventional method for adding special functional components into kaolin microspheres to improve a pore structure and increase the crystallization degree is avoided; the production cost of the in-situ crystallization product is lowered, as for specific embodiment, the raw material cost is low, and the additional silicon source does not need to be added; and in the synthesis process, the liquid-solid ratio is lowered, and the single-kettle yield is increased.

Description

Technical field [0001] The invention relates to a preparation method of a catalytic cracking catalyst, in particular to a preparation method of an in-situ crystalline catalytic cracking catalyst with low cost, higher crystallinity, pore volume and relatively small heap. Background technique [0002] The rapid growth of the national economy has urged my country to continuously increase its dependence on imported crude oil, and the shortage of oil has increasingly become a "bottleneck" restricting my country's economic development. Therefore, how to effectively utilize existing petroleum resources has become a major issue that urgently needs to be resolved in the refining and chemical industry. The quality of domestic crude oil is poor, and the trend of re-quality and deterioration is very obvious. The fraction above 350°C exceeds 70%. With the further increase of oilfield exploitation depth, the trend of crude oil re-quality will become more serious, and the proportion of vacuum ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/08C10G11/05
CPCB01J29/084C10G11/05
Inventor 赵红娟王宝杰胡清勋高永福王久江滕秋霞孙雪芹田爱珍曹庚振张莉熊晓云杨周侠刘宏海
Owner PETROCHINA CO LTD
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