Patent ID: 7578987
Filing Date: 2009-08-25
Classification: B01J,C01B,C07C,Y02P,Y10S

Abstract:
1. A process for preparing a crystalline metallo-aluminophosphate molecular sieve having a framework composition on an anhydrous and calcined basis expressed by an empirical formula of wherein El is selected from the group consisting of silicon, magnesium, zinc, iron, cobalt, nickel, manganese, chromium, and mixtures thereof, “x” is the mole fraction of El and has a value from 0.001 to about 0.5, “y” is the mole fraction of Al and has a value of at least 0.01, “z” is the mole fraction of P and has a value of at least 0.01 and x+y+z=1, the process comprising: providing a reaction mixture comprising an aluminum source, a phosphorous source, water, an El source, an organic template source and a fluoride source to form a catalyst and wherein the template to phosphorus ratio on a molar basis is less than about 0.5; and crystallizing the molecular sieve at a temperature between about 100° C. and about 250° C., to provide the molecular sieve and then calcining in air, where the molecular sieve is characterized as having an essentially pure CHA framework with an average crystal size less than about 5 micrometers.