STA-18, a new member of the molecular sieves type SFW family, its preparation and use

摘要

STA-18 having a SFW structure and containing phosphorus in the skeleton, molecular sieve will be described. STA-18AP (as prepared) is a lower alkylamine, such as trimethylamine, and 1,6- (1,4-diazabicyclo [2.2.2] octane) hexyl cation (from diDABCO-C6 as SDA). ), Or 1,7- (1,4-diazabicyclo [2.2.2] octane) heptyl cation (from diDABCO-C7), or 1,8- (1,4-diazabicyclo [2.2.2] It can have one of the octane) octyl cations (from diDABCO-C8). Lower alkyl ammonium hydroxides such as tetrabutylammonium hydroxide can be used as a pH modifier to make SAPO STA-18. A fired product formed from STA-18AP, STA-18C, is also described. Methods for preparing STA-18AP, STA-18C, and STA-18C metal-containing calcined counterparts can be used in various processes, such as treating exhaust gas and converting methanol to olefins, STA-18C, and STA- A description will be given together with a method using an 18C metal-containing baked counterpart. [Selection] Figure 1