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Catalytic cracking catalyst and preparation method thereof

A catalytic cracking, catalyst technology, applied in catalytic cracking, physical/chemical process catalysts, molecular sieve catalysts, etc., can solve the problems of improving the yield of propylene, not publicly disclosed, etc.

Active Publication Date: 2018-05-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the prior art does not disclose how to further improve the propylene yield of the catalyst containing the MFI structure molecular sieve

Method used

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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

[0050] The preparation method of the catalytic cracking catalyst provided by the present invention includes mixing and beating natural minerals, the first molecular sieve, an 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 is 30 wt %-65 wt % is, for example, 30-55 wt %, and the content of the oxide binder is 15-55 wt %, for example, 25-50 wt % or 20-50 wt %. .

[0051] The preparation method of the catalytic cracking catalyst provided by the present invention, the na...

Embodiment 1

[0072] Mix 333.3g aluminum sol with 148g kaolin, and use decationized water to prepare it into a slurry with a solid content of 28% by weight. After stirring for 1 hour, add the slurry comprising 114g (on a dry basis) ZSM-5 molecular sieve to form a composition The slurry (with a solid content of 30% by weight) was uniformly stirred, and spray-dried to produce composition microspheres, and then the composition microspheres were calcined at 500° C. for 1 hour to obtain the first composition microspheres A1.

[0073] Take 200 g of the first composition microspheres A1 (dry basis mass, the same below) prepared above, add water and beat to obtain a slurry with a solid content of 10% by weight, add 15.1 g 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 neut...

Embodiment 2

[0075] Mix 529.4g silica sol with 32g montmorillonite, and use decationized water to prepare it into a slurry with a solid content of 22.2% by weight. After stirring for 2 hours, add 141g (dry basis) ZRP-1 molecular sieve, stir evenly, and form the first The composition slurry (with a solid content of 35% by weight) was spray-dried to form composition microspheres, and then the composition microspheres were calcined at 350° C. for 2 hours to obtain the first composition microspheres B1.

[0076] Take 200 g of the first composition microspheres 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 stirring, then add 54g hydrochloric acid (HCl mass ...

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Abstract

The invention provides a catalytic cracking catalyst and a preparation method thereof. The catalyst comprises 5 to 65% of natural mineral matters, 10 to 60% of an oxide binder, 24 to 75% of a MFI-structure molecular sieve, 0.1 to 15% of a phosphorus additive and 0.1 to 10% of a metallic additive, wherein the metallic additive is at least one selected from a group consisting of iron, cobalt, nickel, copper, manganese, zinc, tin, bismuth and gallium additives, and the amount of mesoporous protonic acid in the catalyst accounts for 20 to 70% of total acid amount. The preparation method comprisesthe following steps: formation of slurry including the MFI-structure molecular sieve, the natural mineral matters and the inorganic oxide binder; spray drying; treatment with alkali and compound acid;and introduction of the phosphorus additive and the metallic additive. The catalytic cracking catalyst has the advantages of higher propylene yield and BTX yield when applied to catalytic cracking ofpetroleum 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 after 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 propylen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/46C07C4/06C07C4/18C07C11/06C07C15/02C10G11/05
CPCB01J29/46C07C4/06C07C4/18C10G11/05C10G2300/70C10G2400/20C07C11/06C07C15/02Y02P20/52
Inventor 刘宇键王丽霞田辉平周翔袁帅刘俊
Owner CHINA PETROLEUM & CHEM CORP
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