Patent ID: 6238550
Filing Date: 2001-05-29
Classification: B01J,C01B,C10G,Y10S

Abstract:
A hydroprocessing method, comprising contacting a hydrocarbon with a catalytically effective amount of a SAPO catalyst under catalytic hydroprocessing conditions, the SAPO catalyst being a molecular sieve with a framework tetrahedra of silicon, aluminum, and phosphorus having a total silicon amount ranging from above about 4 molar percent to about 20 molar percent, a total aluminum amount ranging from about 40 molar percent to about 55 molar percent, and a total phosphorus amount ranging from about 30 molar percent to about 50 molar percent, the molar percents being based on the total amount of aluminum, phosphorus, and silicon present in the composition, and the molecular sieve having the topology AEL and being isostructural with conventional SAPO-11, wherein(a) the silicon present in the molecular sieve and the conventional SAPO-11 is distributed among silicon sites in the framework tetrahedra, each site having a first, a second, a third, and a fourth next nearest neighbor position, and each next nearest neighbor position being independently occupied by one atom selected from silicon, and aluminum, and(b) the molecular sieve has a substantially smaller number of silicon sites having silicon atoms among all four next nearest neighbor positions than the conventional SAPO-11 having the same silicon amount.