A SILICOALUMINOPHOSPAHTE ISOMERIZATION CATALYST

摘要

A catalyst system for treating a hydrocarbonaceous feed comprising a matrix selected from the group consisting of alumina, silica alumina, titanium alumina and mixtures thereof; a support medium substantially uniformly distributed through said matrix comprising a SAPO-11 molecular sieve; and about 0.1 to about 1.0 wt % (based on the total weight of the catalyst system) of a catalytically active metal phase supported on said medium and comprising a metal selected from the group consisting of platinum, palladium, ruthenium, rhodium or mixtures thereof. The catalyst system is characterized in that said SAPO-11 molecular sieve has: a) a silica to alumina molar ratio of about 0.08 to about 0.24,- b) a phosphorous to alumina ratio of about 0.75 to about 0.83; c) a microsurface area of at least about 150m2/g; d) a crytallite size in the range of abouth 250 to about 600 angstroms, and e) a sodium content of less than about 2000 ppm weight.