Method for preparing NaY molecular sieve of high silica-alumina ratio and product thereof

摘要

The present invention relates to a method for preparing a NaY molecular sieve of a high silica-alumina ratio, wherein deionized water, a silicon source, an aluminum source, an alkali source and ILs as a template agent are mixed to obtain an initial gel mixture: the initial gel mixture is kept at an appropriate temperature and aged, then fed into a high pressure synthesis reactor for crystallization; the solid product is separated and dried, to obtain the NaY molecular sieve of a high silica-alumina ratio, wherein the ILs is a short chain alkylimidazole ionic liquid. The template agent used in the method of the present invention is less volatile, and the resulting high silicon Y molecular sieve has a high degree of crystallinity and a silica-alumina ratio of not less than 6.