Process for producing a crystalline aluminosilicate

摘要

The present invention disclosed a crystalline aluminosilicate which has the following characteristics: (A) an SiO2/Al2O3 molar ratio as determined by chemical analysis of from 5 to 11; (B) a unit cell dimension of from 24.45 to 24.55 (C) a molar ratio of the Al contained in the zeolite framework to the total A1 contained in the aluminosilicate of from 0.3 to 0.9 calculated by the equations specified in the specification; (D) an alkali metal content, in terms of oxide, of from 0.02 to 1.5% by weight; (E) an X-ray diffraction pattern having peaks characteristic of zeolite Y; and (F) an ignition loss of from 0.5 to 20% by weight; and a process for producing the same, and a catalyst employing the same for the catalytic cracking of a hydrocarbon oil and the said catalyst which contains at least one metal selected from rare earth metals and alkaline earth metals.