High zeolite content FCC catalysts and method for making them.

摘要

A method for making increased zeolite content clay derived microspheres by reaction porous precursor microspheres with a sodium silicate solution in the presence of seeds to crystallize zeolite Y in situ in macropores of the precursor microspheres composed of a mixture of metakaolin and kaolin calcined to undergo the exotherm. The increased zeolite content comes from increased macroporosity of the precursor microspheres and increased content of metakaolin in the precursor microspheres. The increase in zeolite is associated with an increase in catalytic activity and unexpectedly improved selectivity.