Abstract: According to the different characteristics of residues, catalyst RDM-36 with large holes for conversion of asphaltene, demetallization catalyst RDMA-31 with doublet holes, porous foam type protective catalyst RG-30 and honeycomb cylindrical type protective catalyst RG-20 and RG-30E with special shape and pore structure were developed by RIPP. Meanwhile layered catalyst bed processes were designed especially for processing residues with high content of Ni+V, asphaltene, and Fe+Ca, respectively. The industrial application results showed that the residue hydrotreating technology with RDMA-31 can be used to treat residue with high asphaltene content. The content of metal impurities in product meets the requirement of high quality raw material for FCC unit. The residue hydrotreating technology with RDM-36 can be used to treat residual oil with a (Ni+V) content close to 200 μg/g. The removal rate of metal impurities reaches the expected target. By reasonably graded RG-30, RG-20 and RG-30E, high (Fe+Ca) content residue can be processed with relatively low pressure drop and prolonged operating cycle.

Key words: poor quality residue, hydrotreating, graded technology, catalyst