Methods for preparing substantially pure SAPO-31 silicoaluminophosphate molecular sieve

摘要

Disclosed herein is a process for preparing substantially pure crystalline SAPO-31 molecular sieve. In particular, disclosed are methods for preparing SAPO-31 which methods employ specified crystallization media with specified pHs. When such crystallization media are employed, the resulting SAPO-31 is substantially pure and has no contamination from crystalline SAPO-11 silicoaluminophosphate molecular sieve.