Y METHOD FOR PREPARING Y TYPE MOLECULAR SIEVE HAVING HIGH SILICA TO ALUMINA RATIO

摘要

The present invention comprises mixing a tetraalkylammonium cation source as deionized water, a silicon source, an aluminum source, an alkali source and a precursor to obtain an initial gel mixture; Aging the initial gel mixture at an appropriate temperature and feeding the gel mixture into a high pressure synthesis kettle for crystallization; There is provided a process for preparing a Y-type molecular sieve having a high silica to alumina ratio, comprising separating and drying the solid product to obtain a Y-type molecular sieve having a high silica to alumina ratio. The process provides a phase-pure Y-type molecular sieve having a high degree of crystallinity,₂/ Al₂O₃Is at least six.;