Postsynthesis of high silica beta by cannibalistic dealumination of OSDA-free beta and its catalytic applications

Al₂(SO₄)₃, as a dealuminating agent, could interact with the framework Al species in Al-rich Beta (Si/Al = 4.3) under mild condition, producing natroalunite phase and dealuminated Beta with higher Si/Al ratios of 7.6–12.