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A kind of preparation method of in-situ crystallization type catalytic cracking catalyst

A catalytic cracking, 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: 2022-02-01
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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  • A kind of preparation method of in-situ crystallization type catalytic cracking catalyst

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Experimental program
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Effect test

Embodiment 1

[0038] 10 kg of kaolin and water were prepared into a slurry with a solid content of 35%, and 500 g of sodium silicate was added as a dispersant for spray molding. The obtained spray soil balls were roasted at 940°C for 2h. Stir 1 kg of roasted soil balls with 1050 mL of 10% sodium hydroxide solution, heat up to 85°C for 120 minutes, then add 200 g of directing agent, heat up to 93°C, conduct static crystallization for 25 hours, filter, wash, and dry.

Embodiment 2

[0040] 10 kg of kaolin and water were prepared into a slurry with a solid content of 27%, and 1000 g of aluminum sol was added as a dispersant for spray molding. The obtained sprayed soil balls were roasted at 920°C for 6 hours to obtain high soil balls, and roasted at 600°C for 6 hours to obtain partial earth balls. After roasting, 800g of high-soil balls and 200g of partial-soil balls were stirred with 950mL of 18% sodium hydroxide solution, and the temperature was raised to 70°C for 180 minutes, then 220g of directing agent was added, the temperature was raised to 96°C, and stirred for 24 hours to crystallize. Filter, wash and dry.

Embodiment 3

[0042] 10 kg of kaolin and water were prepared into a slurry with a solid content of 40%, and 500 g of aluminum sol was added as a dispersant for spray molding. The obtained sprayed soil balls were roasted at 1030°C for 1.5h to obtain high soil balls, and roasted at 850°C for 1.5h to obtain partial earth balls. Stir 650g and 350g of high earth balls after roasting with 750mL of 20% sodium hydroxide solution, and heat up to 100°C for 45min, then add 180g of directing agent, heat up to 85°C, stir and crystallize for 36h, Filter, wash and dry.

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Abstract

The invention provides a method for preparing an in-situ crystallization type catalytic cracking catalyst, specifically, by adjusting the in-situ crystallization process, the roasted soil balls and the sodium hydroxide solution used for crystallization are firstly mixed, and then directly Adding a directing agent for crystallization, without adding any external silicon source, directly obtains a method of in-situ crystallization products with high crystallinity, large pore volume, and low bulk ratio. This method avoids the conventional addition of silicon to kaolin microspheres. Special functional component, method to improve pore structure and increase crystallinity. Moreover, the method reduces the production cost of the in-situ crystallization product, which is embodied in the low raw material cost and no need to add an external silicon source; the liquid-solid ratio decreases during the synthesis process, and the single-pot yield increases.

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 crystallization type catalytic cracking catalyst with low cost, high crystallinity, pore volume and small pile ratio. Background technique [0002] The rapid growth of the national economy has prompted my country's increasing 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 the existing petroleum resources has become a major issue that needs to be solved urgently in the refining and chemical industry. The quality of domestic crude oil is poor, and the trend of heavy and inferior quality is very obvious, and the fraction above 350 °C exceeds 70%. With the further increase of oilfield exploitation depth, the trend of heavy crude oil will become more serious, and the proportion of vacuum residu...

Claims

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Application Information

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Patent Type & Authority Patents(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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