HIGH LIGHT RECEIVED HEAVY OIL CATALYTIC CRACKING CATALYST AND PREPARATION METHOD THEREFOR

摘要

The present invention relates to a high light received heavy oil catalytic cracking catalyst and a preparation method therefor. The catalyst contains 2%-50% of magnesium modified ultra-stable rare earth Y-type molecular sieve by weight, 0.5%-30% of one or more types of other molecular sieves by weight, 0.5%-70% of clay by weight, 1.0%-65% of heat-resisting inorganic oxide by weight, and 0.01%-12.5% of rare earth oxide by weight. The magnesium modified ultra-stable rare earth Y-type molecular sieve is obtained by using an NaY molecular sieve as the raw material and by performing rare earth exchange, dispersion pre-exchange, magnesium salt exchange modification, ammonium salt exchange sodium reduction, and "exchanging twice roasting twice". The catalyst provided by the present invention has the features of high heavy oil conversion capability and high yield of light oil.