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

A catalytic cracking and catalyst technology, applied in the field of catalytic cracking and hydrocarbon oil catalytic cracking, can solve the problems of low yield of low-carbon olefins, insufficient cracking capacity of heavy and inferior crude oil, etc., and achieve the effect of improving pore structure and improving stability

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

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Problems solved by technology

[0013] The purpose of the present invention is to provide a catalyst for catalytic cracking, its preparation method and application and a method for catalytic cracking in order to overcome the problems of insufficient cracking ability of catalysts for

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

Examples

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Example Embodiment

[0058] According to a preferred embodiment of the present invention, the modified ZSM-5 molecular sieve, the pore size of 5nm to 20nm mesopore volume more than 85% of the total pore volume of medium, and more preferably at least 90%, such as 90-96 %. In that case preferably, the modified ZSM-5 zeolite pore structure is conducive to improve the catalytic performance of the modified ZSM-5 zeolite in catalytic cracking reactions.

[0059] According to the present invention, the mesopore volume Preferably, the modified ZSM-5 zeolite accounts for 30-50% of the total pore volume of the modified ZSM-5 zeolite. In that preferred case, in favor isomerization reaction and the generation and diffusion aromatization reaction intermediates and products so as to avoid the modified ZSM-5 zeolite coking deactivation.

[0060] According to a preferred embodiment of the present invention, the modified ZSM-5 zeolite of SiO 2 / Al 2 O 3 The molar ratio is 20-40. In that preferred embodiment, the clea...

Example Embodiment

[0091] The present invention can be widely selected in step (1), as long as the ZSM-5 molecular sieve is capable of contact with the base and alkaline earth metal elements. Preferably, the first solvent is water. The present invention is not particularly limited to the water, which may be water, usually used, distilled water, purified water, and deionized water can be used. In a specific embodiment of the invention, the first solvent is neutral water, and the neutral water is also known as distilled water.

[0092] The present invention has a wider selection range of the first solvent, and can be suitably selected according to the amount of the ZSM-5 molecular sieve with the amount of the base and the alkaline earth metal, as long as it is possible to provide the environment in which the contacts described in step (1) can be provided. I.e. Preferably, the first solvent has a amount of from 100 to 1000 parts by weight relative to 100 parts by weight of the ZSM-5 molecular sieve.

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Example Embodiment

[0180] Example 1

[0181] The catalytic cleavage catalyst is prepared according to the method of the present invention, and the specific steps are as follows:

[0182] (1) Take ZSM-5 molecular sieve (SIO 2 / Al 2 O 3 The molar ratio is 27) 100 g (dry base weight), 600 g of neutral water (also known as distilled water in the present invention), 20 g of NaOH solution (0.833 mol / L), and 20 g of MgO, temperature rise to 70 ° C, contact After 2 h, it was cooled to room temperature, then filtered, washed, and dried to give a solid product; to obtain a filtrate, the element content in the filtrate was measured by an ICP analysis method, in the filtrate, aluminum, aluminum in an oxide, and silicon The total weight content is 7% by weight, and the specific ingredient is listed in Table 1.

[0183] (2) Take the solid product obtained by step (1) (dry base weight), slurry with 640 g of water, then adding 40 g of a weight content of 20% by weight. 2 SO 4 , 60 g of oxalic acid, warmed to 70 ...

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Abstract

The invention relates to the field of hydrocarbon oil catalytic cracking, and discloses a catalytic cracking catalyst. The catalyst comprises a modified ZSM-5 molecular sieve, a binder and optional clay, on the basis of the dry base weight of the catalyst, the content of the modified ZSM-5 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 ZSM-5 molecular sieve comprises a ZSM-5 molecular sieve and alkaline earth metal elements; on the basis of the dry basis weight of the modified ZSM-5 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 ZSM-5 molecular sieve is 15-50. When the catalyst is applied to a cracking reaction, the cracking capability is stronger, the yield of low-carbon olefin is higher, and the propylene selectivity is higher.

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] my country's propylene production capacity has grown rapidly in recent years. my country's crude oil is heavy, and light hydrocarbons and naphtha resources are scarce. Therefore, the development of catalytic cracking technology that produces more propylene is suitable for my country's national conditions. [0003] Some domestic research institutes attach great importance to the research of low-carbon olefin production technology. In the late 1980s, the Academy of Petrochemical Sciences (referred to as "Science Academy") developed a catalytic cracking technology (DCC) that uses heavy oil as a raw material to produce light olefins. The process uses a modified five-membered ring mesoporous zeolite catalyst , use the riser pl...

Claims

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Application Information

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IPC IPC(8): B01J29/40B01J35/10C07C4/06C07C11/04C07C11/06C07C9/04
CPCB01J29/405B01J23/002B01J35/1019B01J35/1061B01J35/1038C07C4/06C07C2529/40B01J2229/18B01J2523/00C07C11/04C07C11/06C07C9/04B01J2523/12B01J2523/22B01J2523/51B01J2523/305B01J2523/3712B01J2523/47B01J2523/48B01J2523/23Y02P20/52
Inventor 张杰潇于善青凤孟龙李家兴杨民田辉平
Owner CHINA PETROLEUM & CHEM CORP
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