Abstract: The fluid catalytic cracking (FCC) slurry was treated with different kinds of flexible filter materials developed indepently to remove solid particles. The effects of filter temperature and feed rate on the removal of solid particles in FCC slurry, and the performance, stability and adaptability of the flexible filter material to different FCC slurries were investigated. The results show that the third-generation filter has the highest solid removal rate, the second-generation filter has slightly higher solid removal rate than the first-generation filter, and the increasing filter temperature, the decreasing feed rate, the desolidation period increases. The third generation of flexible filter material can adapt to high viscosity and high solid particle content of the FCC slurry, and has stable performance and good regeneration performance. With the third generation of flexible filter after mutiple regeneration, the mass fraction of Al and Si in the desolidated slurry is less than 10 μg/g, and the initial pressure drop of the filter is basically the same.

Key words: fluid catalytic cracking, slurry, flexible filter medium, desolidation