Conversion of oxygenates to light olefins using high-silica molecular sieve CHA

摘要

A method is disclosed for converting oxygenates to light olefins by reacting the oxygenate at effective conditions over a catalyst comprising a molecular sieve having the CHA crystal structure and having a mole ratio of greater than 50 to 1500 of (1) an oxide selected from silicon oxide, germanium oxide or mixtures thereof to (2) an oxide selected from aluminum oxide, iron oxide, titanium oxide, gallium oxide or mixtures thereof.