-- NaY METHOD FOR PREPARING NAY MOLECULAR SIEVE OF HIGH SILICA-ALUMINA RATIO AND PRODUCT THEREOF

摘要

The present invention relates to a process for the preparation of NaY molecular sieves with a high silica-to-alumina ratio, wherein DIs are mixed with deionized water, a silicon source, an aluminum source, an alkali source, and as a precursor to obtain an initial gel mixture; The initial gel mixture is maintained at an appropriate temperature, aged and then fed to a high pressure synthesis kettle for crystallization; The solid product is separated and dried to obtain a NaY molecular sieve having a high silica-to-alumina ratio, wherein the ILs are short chain alkylimidazolium ionic liquids. The casting agent used in the process of the present invention is low in volatility and the resulting high silicon Y molecular sieve has a high crystallinity and a silica-to-alumina ratio of 6 or more.;