A kind of anti-heavy metal type catalytic cracking catalyst and preparation method thereof

Abstract

The invention provides an anti-heavy metal catalytic cracking catalyst and a preparation method thereof. The anti-heavy metal catalytic cracking catalyst has 80-50 parts of matrix, preferably 75-60 parts, containing 1-20 parts, preferably 2-12 parts, of rare earth medium and macroporous silicon-alumina materials; 0.5-15 parts, preferably 1-12 parts, of large-grain alumina materials; 20-50 parts, preferably 25-40 parts, of molecular sieves. The catalytic cracking catalyst prepared by the method has the characteristics of strong heavy metal resistance, low oil slurry yield and high total liquid product yield.

Description

technical field [0001] The invention relates to a preparation method of a catalytic cracking catalyst, in particular to a preparation method of an anti-heavy metal catalytic cracking catalyst. Background technique [0002] Since the 1980s, as the world's crude oil has become increasingly heavy and inferior, refineries in various countries have vigorously developed fluid catalytic cracking (FCC) technology for blending or fully refining heavy oil and residual oil, in order to broaden the source of FCC raw oil, To meet the demand for light oil products in the global market and maximize economic benefits. Compared with conventional FCC raw oils (such as AGO and VGO), the content of Ni, V, Fe, Cu and other metals in residual oil or heavy oil is obviously higher, which seriously pollutes FCC catalysts, and the most influential ones are nickel and vanadium, which deposit On the catalyst, the cracking activity of the catalyst is reduced, the product selectivity is poor, and when t...

AI Technical Summary

Problems solved by technology

However, the introduction of these active components does not passivate heavy metals, but lacks further optimization of catalyst matrix acidity and pore structure, resulting in insufficient catalyst performance in heavy oil conversion and coke selectivity.

Images