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 low propylene selection yield and BTX yield, etc.

Active Publication Date: 2018-05-01
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 cracking catalysts used in the conve

Method used

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

Examples

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Example Embodiment

[0053] The method for preparing the catalytic cracking catalyst provided by the present invention includes mixing and beating natural minerals, a first molecular sieve and an oxide binder such as oxide sol and / or oxide gel and water. Based on the total weight of the catalyst, the amount of each component is such that the final catalyst contains 5 wt% to 65 wt% natural minerals, 10 wt% to 60 wt% oxides and 24 wt% to 75 wt% One molecular sieve. More preferably, the amount of each component is such that the composition of the final catalyst includes: a natural mineral content of 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, for example, 30 to 55% by weight, and the content of oxide binder based on oxide is 15 to 55% by weight, for example, 20 to 50% by weight or 25 to 45% by weight or 20 to 35% by weight % Or 12% by weight to 28% by weight.

[0054] In the method for preparing the c...

Example Embodiment

[0075] Example 1

[0076] Mix 267g of aluminum sol with 200g of kaolin, and use decationized water to prepare a slurry with a solid content of 28% by weight. After stirring for 2 hours, add (on a dry basis) 45g of USY and 45g of β molecular sieve to form a composition slurry (solid content is 35% by weight), stirred uniformly, spray-dried to prepare composition microspheres, and then calcined the composition microspheres at 500° C. for 2 hours to prepare the first composition microsphere A1.

[0077] Take 200g of the first composition microspheres A1 (weight on a dry basis, the same below) prepared above, add water to make a slurry with a solid content of 10% by weight, and add 15.1g of high alkali sodium metaaluminate solution (Na 2 O is 290g / L, Al 2 O 3 The density of the solution is 40g / L, the density of the solution is 1.353g / mL), the temperature is raised to 50°C and constant temperature is stirred for 0.5h, filtered and washed until neutral (washing to neutral means that the w...

Example Embodiment

[0078] Example 2

[0079] Mix 353g of silica sol with 80g of montmorillonite and prepare it into a slurry with decationized water. After stirring for 0.5 hours, add 20g of β molecular sieve and 130g of ZSM-5 molecular sieve, and continue to stir evenly to form the first composition slurry (solid content is 35%) Weight), spray-dried to prepare composition microspheres, and then calcined the composition microspheres at 350° C. for 1-2 hours to obtain the first composition microspheres B1.

[0080] Take 200g of the first composition microspheres B1 (dry basis mass) prepared above, add water to prepare a slurry of the first composition microspheres with a solid content of 14% by weight, add 20.5g of NaOH (purity 96%), and heat to 50°C with constant temperature stirring 0.3h, filter and wash to neutral; mix the filter cake with water to make a slurry with a solid content of 10% by weight, add 25.1g oxalic acid during stirring, and then add 247g hydrochloric acid (HCl mass fraction 10%) ...

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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, 0.1 to 15% of a phosphorus additive and 0.1 to 10% of a metallic additive, 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 or composed of two or more selected from molecular sieves with pore diameters of less than 6.9 angstroms; the metallic additive is at least one selected from agroup 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 acidamount. 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; 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 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): B01J29/80C07C4/06C07C4/18C07C11/06C07C15/02C10G11/05
CPCB01J29/106B01J29/46B01J29/68B01J29/76B01J29/7615B01J29/80C07C4/06C07C4/18C10G11/05C10G2300/70C07C11/06C07C15/02Y02P20/52
Inventor 王丽霞刘宇键田辉平周翔袁帅刘俊张杰潇
Owner CHINA PETROLEUM & CHEM CORP
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