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Catalytic cracking catalyst and preparation method thereof

A catalytic cracking, catalyst technology, applied in catalytic cracking, physical/chemical process catalyst, molecular sieve catalyst, etc., can solve the problem of low yield of BTX

Active Publication Date: 2019-12-27
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 are used to convert heavy oil to propylene yield and BTX yield is not high

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

[0051] 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. Based on the total weight of the catalytic cracking catalyst, the amount of each component is such that the final obtained catalytic cracking catalyst contains 5% by weight to 65% by weight of natural minerals, 10% by weight to 60% by weight of oxides and 24% by weight % to 75% by weight of the first 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 20 to 50% by weight or 25 to 45% by ...

Embodiment 1

[0074] 267g aluminum sol is mixed with 180g kaolin, and it is mixed with decationized water into a slurry with a solid content of 30% by weight. After stirring for 2 hours, 15gUSY, 45gβ molecular sieves and 45gZRP-1 molecular sieves are added to form a composition slurry (with a solid content of 35% % by weight), stirred evenly, and spray-dried to make composition microspheres, and then calcined the composition microspheres at 500° C. for 2 hours to obtain the first composition microspheres A1.

[0075] Get 200g of the first composition microsphere A1 (mass on a dry basis, the same below) prepared above, add water and beat 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~...

Embodiment 2

[0077] Mix 333.3g of aluminum sol with 100g of montmorillonite, and use decationized water to prepare it into a slurry with a solid content of 21.5% by weight. After stirring for 0.5 hours, add 20g of REY molecular sieve and 130g of ZSM-5 molecular sieve, and stir evenly to form the first combination The slurry (solid content: 35% by weight) was spray-dried to make composition microspheres, and then the composition microspheres were calcined at 350° C. for 2 hours to obtain the first composition microspheres B1.

[0078] 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 20.5g 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 38g hydrochlor...

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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 a first molecularsieve, and 0.1-15% of a phosphorus additive, the first molecular sieve is a molecular sieve with the pore size of less than 6.9 angstrom, and a Y type molecular sieve, or comprises more than two selected from molecular sieves with the pore size of less than 6.9 angstrom, 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 first molecular sieve, the natural minerals and the inorganic oxide binder, carrying out spray drying, treating with an alkali and a compound acid, and introducing the 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 application. 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 prop...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/80C07C4/06C07C11/06C10G11/05
CPCB01J29/084B01J29/40B01J29/65B01J29/7007B01J29/80C07C4/06C10G11/05C10G2300/70C10G2400/20C07C11/06Y02P20/52
Inventor 王丽霞周翔田辉平袁帅刘宇键刘俊
Owner CHINA PETROLEUM & CHEM CORP
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