Preparation method of in-situ crystallization catalytic cracking catalyst

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 catalytic cracking catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0051] Preparation of in-situ crystallization product: the directing agent is prepared by mixing 308g of water glass and 189g of peralkali sodium metaaluminate, and standing at 35°C for 15h. 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 1kg of roasted high clay balls with 1050mL of 10% sodium hydroxide solution, heat up to 85°C for 120min, then add 200g of directing agent, heat up to 93°C, statically crystallize for 25h, filter, wash and dry.

[0052] Preparation of in-situ crystallization catalyst: Mix 500g of in-situ crystallization product with 100g of ammonium chloride, 100g of ammonium sulfate and 3000g of distilled water, adjust the pH value to about 3.5 with hydrochloric acid solution, heat up to 85°C for 2 hours, filter, and filter cake Wash with 2000g of distilled water to obtain an exchange sa...

Embodiment 2

[0054] Preparation of in-situ crystallization products: the directing agent is prepared by mixing 312g of water glass and 208g of peralkali sodium metaaluminate, and standing at 33°C for 20h. 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. Stir 800g of high-soil balls and 200g of partial-soil balls after roasting with 950mL of 18% sodium hydroxide solution, and heat up to 70°C for 180 minutes, then add 220g of directing agent, heat up to 96°C, stir and crystallize for 24h, filter , wash and dry.

[0055] Preparation of in-situ crystallization catalyst: mix 500g of in-situ crystallization product with 300g of ammonium nitrate, 75g of lanthanum chloride and 3000g of distilled water, adjust the pH value to about 4.0-4.5...

Embodiment 3

[0057] Preparation of in-situ crystallization product: the directing agent is prepared by mixing 153g of water glass and 98g of peralkali sodium metaaluminate, and standing at 34°C for 32h. 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.

[0058] Preparation of in-situ crystallization catalyst: Mix 500g of in-situ crystallization product with 300g of ammonium nitrate, 25g of lanthanum chloride, 25g of lanthanum nitrate and 3000g of distilled water, adjust the pH value to about 4.0-4.5 with hy...

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Abstract

The invention provides a preparation method of an in-situ crystallization catalytic cracking catalyst. Specifically, an in-situ crystallization process is adjusted, that is, the method comprises the steps of firstly mixing roasted soil balls and a sodium hydroxide solution for crystallization, and directly adding a guiding agent for crystallization without adding any external silicon sources to directly obtain an in-situ crystallization product with high crystallinity, a large pore volume and a low bulk density, and the method provided by the invention avoids a conventional method of adding special functional components into kaolin microspheres to improve a pore structure and improve crystallinity; the method provided by the invention reduces the production costs of the in-situ crystallization product, specifically, the raw material costs are low, and additional silicon sources are not required to be added; in the synthetic process, the liquid-solid ratio is reduced, and the single-kettle yield is increased; and after the in-situ crystallization product is modified by rare earth, the conversion rate of heavy oil can be increased, and the yield of a target product 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 crystallization catalytic cracking catalyst with low cost, relatively high crystallinity, pore volume and small bulk 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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/08C10G11/05
CPCB01J29/088C10G11/05C10G2400/02C10G2400/04
Inventor 赵红娟田爱珍王宝杰熊晓云王久江胡清勋杨周侠张莉刘宏海赵晓争孙雪芹滕秋霞
Owner PETROCHINA CO LTD
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