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Catalytic cracking catalyst and preparation method thereof

A catalytic cracking and catalyst technology, applied in catalytic cracking, physical/chemical process catalysts, molecular sieve catalysts, etc., can solve the problems of poor catalyst activity selectivity and low propylene yield

Active Publication Date: 2020-03-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] However, the existing catalytic cracking catalysts containing IMF structural molecular sieves have poor catalyst activity and target product selectivity such as low propylene yield in larger hydrocarbon molecules such as heavy oil catalytic cracking reactions, and the prior art does not disclose how to further Improvement of Propylene Yield over Catalyst Containing IMF Structure Molecular Sieve

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  • Catalytic cracking catalyst and preparation method thereof
  • Catalytic cracking catalyst and preparation method thereof

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preparation example Construction

[0049] The preparation method of the catalytic cracking catalyst provided by the present invention comprises mixing beating of natural mineral matter, the first molecular sieve and oxide binder such as oxide sol and / or oxide gel and water. The amount of each component is such that the final catalyst contains, based on the total weight of the catalyst, 5% to 65% by weight of natural minerals, 10% to 60% by weight of oxides and 24% to 75% by weight of the second A molecular sieve. More preferably, the amount of each component is such that the composition of the final catalyst includes: the natural mineral content is 5% to 50% by weight on a dry basis, such as 8 to 45% by weight, and the content of the first molecular sieve on a dry basis The content of the oxide binder is 15-55% by weight, for example, 25-50% by weight.

[0050] The preparation method of the catalytic cracking catalyst provided by the present invention, the natural minerals include kaolin, halloysite, montmoril...

Embodiment 1

[0071] Mix 346.7g of aluminum sol with 148g of kaolin, and use decationized water to prepare it into a slurry with a solid content of 28% by weight. After stirring for 2 hours, add the slurry containing 111g (on a dry basis) IM-5 molecular sieve, and stir evenly. A composition slurry (solid content: 30% by weight) was formed, spray-dried to form composition microspheres, and then the composition microspheres were calcined at 500° C. for 1 hour to obtain the first composition microspheres A1.

[0072] Get 200g of the first composition microsphere A1 (dry basis mass, the same below) prepared above, add water and beating to obtain a slurry with a solid content of 10% by weight, add 15.1g of high alkali sodium metaaluminate solution (Na 2 O is 290g / L, Al 2 o 3 40g / L, the solution density is 1.353g / mL), heated up to 50°C and stirred at constant temperature for 0.5h, filtered and washed to neutral (washing to neutral means that the washing liquid after washing is neutral, pH6~8); ...

Embodiment 2

[0074] 529.4g silica sol was mixed with 36g montmorillonite, and it was mixed with decationized water to make a slurry, the slurry solid content was 22.5% by weight, after stirring for 0.5 hours, 138 grams (in dry basis) IM-5 molecular sieves were added, and the mixture was evenly stirred. The first composition slurry (solid content is 35% by weight) was formed, spray-dried to form composition microspheres, and then the composition microspheres were calcined at 350° C. for 1-2 hours to obtain the first composition microspheres B1.

[0075] Take 200 g of the first composition microsphere B1 (mass on a dry basis) prepared above, add water to prepare the first composition microsphere slurry with a solid content of 10% by weight, add 20.5 g of NaOH (purity: 96%), heat up to 70° C., and stir at a constant temperature 0.3h, filter and wash until neutral; add water to the filter cake and beat to obtain a slurry with a solid content of 10% by weight, add 25.1g oxalic acid during stirri...

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Abstract

The invention provides a catalytic cracking catalyst and a preparation method thereof, wherein the catalyst comprises 5-65% of natural minerals, 10-60% of an oxide binder, 24-75% of an IMF-structure molecular sieve, and 0.1-15% of a phosphorus additive, and the amount of the mesoporous protonic acid of the catalyst accounts for 20-70% of the total acid amount. The preparation method comprises: forming a slurry containing the IMF-structure molecular sieve, the natural minerals and the inorganic oxide binder, carrying out spray drying, treating with an alkali and a compound acid, and introducingthe phosphorus additive. According to the present invention, the catalytic cracking catalyst has high propylene yield and high BTX yield in the catalytic cracking of petroleum hydrocarbons.

Description

technical field [0001] The invention relates to a catalytic cracking catalyst and its preparation method and reference. Background technique [0002] Low-carbon olefins such as ethylene, propylene, and butene are essential chemical raw materials and can be used to synthesize resins, fibers, and rubber. Among them, propylene is an important raw material used to manufacture petrochemical products next to ethylene, and is mainly used to produce chemical products such as polypropylene, acrylonitrile, and propylene oxide. At present, propylene at home and abroad mainly comes from the by-products of thermal cracking to produce ethylene. The second largest source of propylene is the FCC unit, which provides about 30% of the demand. In the United States, the FCC unit provides the demand for propylene from petrochemical products. half of. [0003] In recent years, the demand for propylene has grown rapidly. According to the forecast of HIS, by 2016, the growth rate of global propyl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/70B01J29/76B01J29/78C07C11/06C07C4/06C10G11/05
CPCB01J29/70B01J29/76B01J29/78C07C4/06C07C11/06C10G11/05C10G2400/20Y02P20/52
Inventor 王丽霞田辉平刘宇键周翔袁帅刘俊张杰潇
Owner CHINA PETROLEUM & CHEM CORP