Catalytic cracking catalyst for producing propylene as well as preparation method and application method thereof

A catalytic cracking and catalyst technology, applied in physical/chemical process catalysts, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problem of low propylene selectivity, achieve high propylene selectivity, good wear resistance, and high conversion rate Effect

Active Publication Date: 2021-03-12
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the selectivity of propylene is not high

Method used

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  • Catalytic cracking catalyst for producing propylene as well as preparation method and application method thereof
  • Catalytic cracking catalyst for producing propylene as well as preparation method and application method thereof
  • Catalytic cracking catalyst for producing propylene as well as preparation method and application method thereof

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Experimental program
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Effect test

Embodiment approach

[0040] According to the catalyst preparation method provided by the present invention, one embodiment, the preparation method of the zirconium-aluminum composite sol includes the following steps:

[0041] The mixture containing alumina precursor, zirconium dioxide precursor, acid, surfactant and water is acidified and hydrolyzed; the conditions of said acidified hydrolysis include: the temperature is 10-100°C, and the time is 0.2-5h. Preferably, the acidification hydrolysis conditions include: the temperature is 10-60° C., and the time is 0.5-2 h. More preferably, the temperature is 20-45° C., and the time is 0.5-1 h.

[0042] In the method for preparing the zirconium-modified composite sol of the present invention, there is no particular limitation on the specific method for obtaining the mixture, but in order to further improve the performance of the obtained zirconium-aluminum composite sol, preferably, the alumina precursor, zirconium dioxide The precursor, acid and water ...

specific Embodiment approach A

[0050] The method for preparing the zirconium modified composite sol of the present invention, a specific embodiment A, includes: adding the alumina precursor to the acid solution, and dispersing for 10-60min, the dispersion is preferably carried out in a homogenizer, and then adding The aqueous solution of the precursor of zirconium dioxide is dispersed for 10-60 minutes. The dispersion is preferably carried out in a homogenizer to obtain a first mixture; a surfactant is added to the first mixture for acidification and hydrolysis.

specific Embodiment approach B

[0051] According to the preparation method of zirconium modified composite sol according to the present invention, a specific embodiment B, the method includes: under stirring conditions, adding alumina precursors and zirconia precursors to the acid solution, and continuing to stir for 10-60min , to obtain the first mixture; adding a surfactant to the first mixture for acidification and hydrolysis.

[0052] According to the preparation method of the zirconium-modified composite sol of the present invention, the product of the above acidification and hydrolysis is the zirconium-aluminum composite sol, which can be directly used to prepare the catalyst. Preferably, the method further includes: reacting the product obtained by the acidification hydrolysis under ultrasonic conditions (this invention is called ultrasonic treatment). The product obtained after ultrasonic treatment was used to prepare the catalyst.

[0053] According to a preferred embodiment of the method for prepa...

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Abstract

The invention belongs to the technical field of catalytic cracking catalysts and discloses a catalytic cracking catalyst for producing propylene as well as a preparation method and an application method of the catalytic cracking catalyst. The catalyst comprises natural minerals, zirconium-aluminum composite sol, other inorganic oxide binders, a Y-type molecular sieve and an MFI structure molecularsieve. The preparation method of the catalyst comprises the following steps: mixing and pulping the MFI structure molecular sieve, the Y-type molecular sieve, the natural minerals, the zirconium-aluminum sol and other inorganic oxide binders, and carrying out spray drying. The catalyst has good strength and high activity, is used for catalytic cracking of hydrocarbon oil, and has high raw material conversion rate and high propylene yield.

Description

technical field [0001] The invention belongs to the technical field of catalytic cracking catalysts, and relates to a catalytic cracking for producing propylene, a preparation method and an application method thereof. 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. Therefore, it is an effective and efficient way t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/80B01J29/40B01J29/08B01J35/02C07C11/06C07C4/06C10G47/20
CPCB01J29/80B01J29/405B01J29/088B01J35/026C07C4/06C10G47/20C10G2400/20C07C11/06Y02P20/52
Inventor 林伟孙敏杨雪王鹏宋海涛
Owner CHINA PETROLEUM & CHEM CORP
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