Separation of Fluid Catalytic Cracking Equilibrium Catalysts to Improve Value and Reduce Waste

摘要

Useful portions of equilibrium catalyst from a Fluid Catalytic Cracking unit are obtained by fractionating to obtain a narrow size fraction, followed by separation of the narrow size fraction using density as a fractionating criterion. Size fractionating may be performed in vibrating sieves, and the density fractionating may be performed in an air cyclone. Both beneficial and detrimental fractions can be identified; in one embodiment, large particles are removed from ECAT to improve the coking factor.

主权项

1. Method of making a catalyst composition having at least one improved catalytic property from a particulate equilibrium catalyst comprising (a) fractionating said equilibrium catalyst by size, (b) recovering at least one particulate size fraction from step (a) comprising at least 80% particles within a size range having limits no greater than 30 microns apart, (c) further fractionating said at least one particulate size fraction in an air classifier, to obtain at least two subfractions, and (d) recovering at least one subfraction having at least one improved catalytic property.