Use of magnetic separation to remove non-magnetic, particles from FCC catalyst

摘要

A process for use of magnetic separation to remove non- magnetic particles from FCC catalyst is disclosed. A stream of circulating catalyst from a fluidized catalytic cracking (FCC) unit is charged to a magnetic separator. The catalyst is magnetically fractionated into at least three fractions, a high-metals fraction which is discarded, an intermediate-metals content fraction which is directly recycled to the FCC unit, and an inert, relatively magnetic metals-free fraction which is also discarded. Preferably, the high-metals fraction is immediately mixed with the inert, low-metals fraction, and the combined high- metals/inert fraction is pneumatically transmitted together to a spent catalyst storage facility for disposal.