Catalytic cracking catalyst, preparation method and application thereof, and catalytic cracking method

A catalytic cracking and catalyst technology, used in catalyst activation/preparation, catalytic cracking, physical/chemical process catalysts, etc., can solve the problems of insufficient cracking capacity of heavy and inferior crude oil, low olefin yield and selectivity, etc., and improve pore structure. , the effect of improving stability

Active Publication Date: 2021-10-26
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to provide a catalytic cracking catalyst and its preparation method and application and a catalytic cracking catalyst in order to overcome the problems of insufficient cracking ability of heavy and inferior crude oil and low yield and selectivity of C4 and below olefins in the prior art. The method, in the catalytic cracking reaction, the catalyst has the characteristics of higher yield of C4 and below olefins and higher butene selectivity

Method used

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  • Catalytic cracking catalyst, preparation method and application thereof, and catalytic cracking method
  • Catalytic cracking catalyst, preparation method and application thereof, and catalytic cracking method
  • Catalytic cracking catalyst, preparation method and application thereof, and catalytic cracking method

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Embodiment approach

[0049] According to a preferred embodiment of the present invention, in the modified Beta molecular sieve, the mesopore volume with a pore diameter of 5 nm to 20 nm accounts for more than 85% of the total mesopore volume, more preferably 90% or more, for example, 90-96% . In this preferred situation, the pore structure of the modified Beta molecular sieve is conducive to improving the catalytic performance of the modified Beta molecular sieve in the catalytic cracking reaction.

[0050] According to the present invention, preferably, the specific surface area of ​​the modified Beta molecular sieve is greater than 500m 2 / g, preferably greater than 530m 2 / g, for example 530-620m 2 / g. In this preferred situation, it is beneficial to improve the catalytic performance of the modified Beta molecular sieve in the catalytic cracking reaction. In the present invention, the specific surface area is measured by the BET adsorption method.

[0051] According to the present inventio...

specific Embodiment approach

[0083] The present invention has a wide selection range for the first solvent described in step (1), as long as the environment in which the Beta molecular sieve contacts with alkali and alkaline earth metal elements can be provided. Preferably, the first solvent is water. The present invention has no particular limitation on the water, which can be water of various hardness, and commonly used tap water, distilled water, purified water and deionized water can all be used. In a specific embodiment of the present invention, the first solvent is neutral water, which is also called distilled water.

[0084] In the present invention, the amount of the first solvent can be selected in a wide range, and can be appropriately selected according to the amount of the Beta molecular sieve and the compound of alkali and alkaline earth metal, as long as the contact in step (1) can be carried out smoothly. Preferably, relative to 100 parts by weight of the Beta molecular sieve, the amount o...

Embodiment 1

[0172] Prepare catalytic cracking catalyst according to the method of the present invention, concrete steps are as follows:

[0173] (1) Take Beta molecular sieve (SiO 2 / Al 2 o 3 Molar ratio is 25; Sodium oxide content 0.05% by weight, the same below) 100g (dry weight), add 600g neutral water (also known as distilled water in the present invention), 20g NaOH solution (molar concentration is 0.833mol / L) and 20g of MgO, heated up to 70°C, after contacting for 2 hours, cooled to room temperature, then filtered, washed and dried in sequence to obtain a solid product; the filtrate was obtained for later use, and the element content in the filtrate was determined by ICP analysis method. In the filtrate, calculated as oxides The total weight content of aluminum and silicon calculated as oxides is 6.8% by weight, and the specific components are listed in Table 1.

[0174] (2) get the solid product 80g (dry basis weight) that step (1) obtains, make a slurry with 640g water, then ad...

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Abstract

The invention relates to the field of hydrocarbon oil catalytic cracking, and discloses a catalytic cracking catalyst. The catalytic cracking catalyst comprises a modified Beta molecular sieve, a binder and optional clay, on the basis of the dry base weight of the catalyst, the content of the modified Beta molecular sieve in terms of dry base is 20-60 wt%, the content of the clay in terms of dry base is 0-50 wt%, and the content of the binder in terms of oxide is 10-40 wt%; the modified Beta molecular sieve comprises a Beta molecular sieve and alkaline earth metal elements; on the basis of the dry basis weight of the modified Beta molecular sieve, in terms of oxide, the content of the alkaline earth metal element is 10-30 wt%; and the molar ratio of SiO2 to Al2O3 of the modified Beta molecular sieve is 15 to 45. In the catalytic cracking reaction, the catalyst has the characteristics of higher yield of C4 and below olefins and higher butene selectivity.

Description

technical field [0001] The invention relates to the field of catalytic cracking of hydrocarbon oil, in particular to a catalytic cracking catalyst, a preparation method and application thereof, and a catalytic cracking method. Background technique [0002] The composition and structure of foreign oil processed by catalytic cracking are very complex. The processing raw materials and production processes of each refinery are different, and the demand for target products shows a clear trend of differentiation. The most prominent problem in production is how to process heavy and low-quality raw materials At the same time, it produces clean oil products and high value-added chemical products. Due to the characteristics of gasoline production in my country, the proportion of catalytic cracked gasoline in gasoline blending components is high, generally above 75%, and the proportion of reformed gasoline is low, resulting in generally low gasoline aromatics and benzene content; the p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/70B01J29/76B01J35/10C07C4/06C07C11/02C07C11/06C07C11/08C10G11/05
CPCB01J29/7007B01J29/7057B01J29/7615B01J37/0009C07C4/06C10G11/05B01J2229/18C10G2400/20B01J35/617B01J35/615B01J35/647C07C11/02C07C11/06C07C11/08Y02P20/52
Inventor 张杰潇李家兴于善青凤孟龙杨民田辉平
Owner CHINA PETROLEUM & CHEM CORP
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