Synthesis and characterization of a novel extra large pore aluminophosphate molecular sieve, NCL-6

Catalysis Division, National Chemical Laboratory, Pune-411 008, India E-mail: venkat@cata.ncl.res.in Fax: 91-20-5893761 Manuscript received 10 July 2003, revised 12 April 2004, accepted 30 August 2004 A novel extra large pore aluminophosphate molecular sieve NCL-6, has been prepared and characterized by various techniques such as XRD, SEM, TG/DTA, carbon and nitrogen analysis, FT-IR and MAS NMR are reported. X-Ray diffraction pattern shows that the synthesized sample is crystalline and have novel structure. SEM analysis indicate the phase purity and having granules morphology with 3 x 5 µm particle size. FT-IR spectrum in the framework region shows that the sample is similar to the other known aluminophosphates. TG/DTA shows that the sample losses 30.45% due to the loss of water and organic molecules. Aluminium and phosphorous NMR shows that the presence of four different aluminium and three different phosphorous sites. The NMR are similar to VPl-5, NCL-2 and NCL-3