MODIFICATION OF MOLECULAR SIEVE CATALYSTS FOR REDUCED METHANE PRODUCTION DURING CONVERSION OF OXYGENATES TO OLEFINS

摘要

The present invention relates to molecular sieve catalysts comprising a silicoaluminophosphate molecular sieve and an oxygenated chelating agent, the oxygenated chelating agent comprising functional groups selected from the group consisting of an anhydride, a plurality of carboxyl groups, a combination of a carboxyl group and a hydroxyl group, and salts of said functional groups.