| abstract |
Described is STA-18, a molecular sieve having an SFW structure and containing phosphorus in the framework. STA-18AP (as prepared) may be a lower alkylamine, e.g. Trimethylamine, and one of 1,6- (1,4-diazabicyclo [2.2.2] octane) hexyl cations (from diDABCO-C6) or 1,7- (1,4-diazabicyclo [2.2.2] octane ) heptyl cations (from diDABCO-C7) or 1,8- (1,4-diazabicyclo [2.2.2] octane) octyl cations (from diDABCO-C8) as SDAs. A lower alkylammonium hydroxide, such as tetrabutylammonium hydroxide, can be used as a pH modifier to make SAPO STA-18. A calcined product, STA-18C, which is formed from STA-18AP is also described. Methods of making STA-18AP, STA-18C, and metal-containing, calcined counterparts of STA-18C are as well as methods of using STA-18C and metal-containing, calcined counterparts of STA-18C in a variety of methods, such as. As treating exhaust gases and converting methanol to olefins described. |