The preparation process of molecular sieves with structure faujasu00ectica Y type, pre molded bodies, and use of the same composition catalu00ectica

摘要

"The process of preparation of molecular sieves with structure faujasu00ectica Y type, pre molded bodies, and use of the same composition catalu00ectica".It is described a process for the preparation of molecular sieve with structure faujasu00edtica, type Y, bodies and pre molded molecular sieve with faujasu00edtica structure type.The process comprises the preparation of a gel precursor from a mixture of a source of silica alumina or an alumina source and a source of silica and an inorganic conductorof structure.In molar ratio SiO ~ 2 ~ / Oh ~ 2 ~ ~ 3 ~ suitable for the formation of zeolites Y type, drying of the gel precursor and the contact of the gel precursor of Y type zeolites with water vapor.Optionally followed a, caustic washing, without formation of other crystalline phases different zeolites type y.The pre molded body prepared with the gel precursor of zeolites y, when subjected to the process described here.Presenting its external surface more preferably covered with crystals of zeolites Y type, in a non-homogeneous distribution mode, which brings advantages.These products can be used as a catalyst or adsorbent in various processes of the oil and chemical industry.