A kind of macroporous kaolinite and its preparation and application

Abstract

A kind of macroporous kaolinite and its preparation and application, the average pore diameter of the macroporous structure kaolinite is 2-50nm, and the pore volume of the pores whose pore diameter is 10-50nm in the macroporous structure kaolinite Accounting for more than 80% of the total pore volume. A method for preparing kaolinite with a macroporous structure, comprising the following steps: first roasting kaolin at 650-800°C for 0.5-3 hours, then treating it in an acidic solution, and then roasting at 650-800°C for 0.5-3 hours The second calcination was carried out for 3 hours, and then treated in an acid solution in the presence of a pore-enlarging agent, filtered, and dried. The macroporous kaolinite is used as a catalytic cracking catalyst, which can improve the cracking performance of the catalyst, improve the anti-coking ability, and improve the anti-metal pollution performance.

Description

technical field

[0001] The invention relates to a kaolinite with a macroporous structure, a preparation method and an application method thereof. Background technique

[0002] With the gradual depletion of petroleum resources, the use of low-quality residual oil is a difficult problem for the oil refining industry, and how to improve the refining effect of low-quality residual oil is the top priority. Catalytic cracking (FCC) has always been the most important crude oil secondary processing method in my country's oil refining enterprises due to its strong adaptability to raw materials, high yield of light oil products, and high octane number of gasoline. Currently, catalytic cracking undertakes 75% of my country's gasoline, 35% of diesel and propylene, ethylene and other chemicals production tasks. The core of catalytic cracking is the catalytic cracking catalyst. The inferior quality of the catalytic cracking raw material will lead to the degradation of the performance of t...

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