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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 problem of low selectivity of propylene

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

[0008] However, the existing cracking catalysts containing Y-type molecular sieves and shape-selective molecular sieves have low propylene selectivity

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

[0046] 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 30% to 65% by weight, such as 30 to 55% by weight, the content of the oxide binder in terms of oxides is 15 to 55% by weight, such as 25 to 50% by weight or 15 to 45% by weight or 20 to 35% by weight % or 12% to 28% by weight.

[0047] The preparat...

Embodiment 1

[0068] 267g aluminum sol was mixed with 168g kaolin, and it was formulated with decationized water into a slurry with a solid content of 31% by weight. After stirring for 0.5 hours, the molecular sieve slurry containing 24gUSY, 45gβ molecular sieve and 45g ferrierite was added to form a composition slurry ( solid content is 35% by weight), stirred evenly, and spray-dried to make composition microspheres, and then calcined the composition microspheres at 500° C. for 1 hour to obtain the first composition microspheres A1.

[0069] Take 200 g of the first composition microsphere 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 11.4 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 solution afte...

Embodiment 2

[0071] Mix 411.8g silica sol with 80g montmorillonite, and use decationized water to prepare it into a slurry with a solid content of 30% by weight. After stirring for 2 hours, add the slurry formed by 75gREY molecular sieve and 60gZSM-5 molecular sieve and water, stir Uniform, form the first composition slurry (solid content is 35% by weight), spray-dry to make composition microspheres, then bake the composition microspheres at 350° C. for 2 hours to obtain the first composition microspheres B1.

[0072] 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 16 g of NaOH (purity 96%), heat up to 70° C. and stir at a constant temperature for 0.3 h, filter and wash to neutrality; the filter cake is beaten with water to obtain a slurry with a solid content of 10% by weight, add 16g oxalic acid in the stirring, then add 38g hydrochloric acid (H...

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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 first molecular sieves, wherein the first molecular sieves are composed of molecular sieves with pore diameters of less than 6.9 angstroms and optional Y type molecular sieves, and the amount of mesoporous protonic acid in the catalyst accounts for 20 to 70% of total acid amount. The preparation method comprises the following steps: formation of slurry including the first molecular sieves, the natural mineral matters and the inorganic oxide binder; spray drying; and treatment with alkali and compound acid. The catalytic cracking catalyst has the advantages of higher propylene yield and BTX yield when applied to 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 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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IPC IPC(8): B01J29/80C07C11/06C07C4/06C10G11/05
CPCB01J29/80C07C4/06C07C11/06C10G11/05C10G2400/20Y02P20/52
Inventor 王丽霞袁帅刘宇键田辉平刘俊周翔
Owner CHINA PETROLEUM & CHEM CORP
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