Process for catalyst recovery and optional recycle in a slurry hydrocracking process

摘要

A process for slurry hydrocracking catalyst recovery is described. In one embodiment, the process includes separating effluent from a slurry hydrocracking zone into a first portion comprising solvent and clarified pitch and a second portion comprising pitch and catalyst. The second portion is contacted with an acid to leach the catalyst out of the pitch forming an aqueous solution and pitch residue. The aqueous solution is contacted with an anion to form an insoluble salt which is the catalyst.

主权项

1. A process for catalyst recovery wherein the catalyst comprises Fe(1-x)S, where x is between 0 and 0.2, the process comprising:
separating effluent from a slurry hydrocracking zone into a first portion comprising solvent and clarified pitch and a second portion comprising pitch and Fe(1-x)S catalyst; contacting the second portion with H2SO4 to leach the Fe(1-x)S catalyst out of the pitch forming an aqueous solution of FeSO4 and pitch residue; and contacting the aqueous solution of FeSO4 with Na2S to form insoluble Fe(1-x)S and an aqueous solution of Na2SO4.